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Notes for Guidance on THE WEIGHING EQUIPMENT (AUTOMATIC CATCHWEIGHING INSTRUMENTS)

REGULATIONS 2003 (SI 2003/2761) Issue 1 October 2004 © Crown copyright National Weights and Measures Laboratory Stanton Avenue Teddington Middlesex TW11 0JZ UK STD 7750

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Disclaimers ♦ These Notes for Guidance are not and do not purport to be an authoritative interpretation of the law. The law can only be interpreted by the Courts, although the Secretary of State does have certain powers to adjudicate when differences arise on interpretation of the Weighing Equipment (Automatic Catchweighing Instruments) Regulations 2003, SI 2003/2761, as described in section 15(4) of the Weights and Measures Act 1985 (see Annex 1). Where examples are given throughout this guidance they represent an opinion and do not form an authoritative interpretation. In case of any doubt, users of this guidance are advised to seek and rely on their own independent, including legal, advice. ♦ Health and Safety at Work Act 1974: Nothing in these Notes for Guidance should be construed as overriding, amending or deferring safety regulations and requirements issued by the Health and Safety Executive, in connection with the conduct of persons and the condition and use of machinery and equipment on any premises. Foreword The Weighing Equipment (Automatic Catchweighing Instruments) Regulations 2003, SI 2003/2761, hereafter referred to as “the 2003 Regulations”, implement International Recommendation R 51 of the Organisation Internationale de Métrologie Légale (OIML) into our law, that is to say the law of Great Britain. As members of OIML, we have a moral obligation to do this. This Recommendation covers automatic catchweighing instruments, such an instrument being defined as an "instrument which weighs pre-assembled discrete loads or single loads of loose material" (R 51 T.1.3) but the definition in the 2003 Regulations specifically excludes automatic weight grading instruments and automatic checkweighing instruments. The 2003 Regulations came into force on 3 March 2004. The 2003 Regulations set out requirements for compliance with the type approval (also known as pattern approval) of automatic catchweighing instruments, the manner in which such instruments should be erected and installed, their use and manner of use, their verification and the need for them to meet with certain marking and other requirements if they are to be used for trade. The weights and measures legislation in Northern Ireland is expected to be brought into line in due course. Please note that for the purposes of this guidance: (a) Statutory Instrument Number is abbreviated to “SI” (b) the terms ‘material/s’ and ‘product/s’ and ‘goods’ shall be taken to have the

same meaning

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Contents Paragraph number Part 1 – General................................................................................................................................. 1 • Introduction.............................................................................................................................................1 • Scope and Application ...........................................................................................................................4 • Transitional Exclusion ............................................................................................................................5 • OIML and removal of barriers to trade ..................................................................................................6 • Changes made by the 2003 Regulations............................................................................................9 • Use of supplementary indications .......................................................................................................11 Part 2 - Guidance for Manufacturers/Importers ........................................................................... 12 • Automatic Weighing Instrument/NAWI: Aid to Classification .........................................................14 • Obtaining Type Approval ....................................................................................................................15 • Class of instrument .............................................................................................................................25 • Testing and Stamping.........................................................................................................................26 • Obliteration of the Stamp....................................................................................................................33 Part 3 - Approved Verification under Section 11A of the Weights And Measures Act 1985............................................................................................................................................................39 Part 4 - Guidance for Inspectors (Trading Standards Officers) .....................................................46 • Testing and Stamping.........................................................................................................................47 • Schedule 5 Prescribed Limits of Error...............................................................................................54 • Obliteration of the Stamp....................................................................................................................55 • Electronic access to OIML Recommendations.................................................................................58 Part 5 - Guidance for Owners and Users.............................................................................................59 • Testing .................................................................................................................................................59 • Manner of Erection and Installation ...................................................................................................60 • Variations to the instrument................................................................................................................64 Annex 1

• Extracts from the Weights and Measures Act 1985 referred to in these Notes for Guidance

Annex 2 • Extracts from Acts relating to the definition of ‘waste’ referred to in Schedule 3 to

the 2003 Regulations Annex 3

• Extracts from OIML R 51 Part 1, which are referenced in the 2003 Regulations but not reproduced there, or which are required for testing for passing as fit for use for trade

Annex 4 • Principles from OIML R 51 Part 2, entitled: Automatic catchweighing

instruments Part 2: Test report format Annex 5

• Extracts from Draft 3 of the EU Growth Programme ‘MID-AWI’ Proposal for WELMEC Guide 2.6 ‘Guide for the testing of automatic catchweighing instruments’

Annex 6 • Index to these Notes for Guidance

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PART 1 GENERAL Introduction 1. These Notes have been prepared to help explain the Weighing Equipment (Automatic Catchweighing Instruments) Regulations 2003, SI 2003/2761 ("the 2003 Regulations"), which implement OIML R 51 (“R 51”). The 2003 Regulations apply to a range of automatic catchweighing instruments (“catchweighers”), with certain exclusions, that are used for a variety of trade purposes. A catchweigher may, amongst other things, be a weigh labeller or a weigh-price labeller, or an on-board weighing system i.e. a garbage weigher or a front-end loader. Weigh-price labellers are often used in the food packaging industry in factories for packing and labelling products such as meat, cheese, fruit or vegetables; weigh labellers are used in the weighing of parcels to determine a conveying tariff, front-end loaders might be used by builders’ merchants to weigh sand, for example, and garbage weighers are used for weighing waste or recycled goods, such as glass. The Notes are for the guidance of all who are concerned with observing or applying the controls required by the 2003 Regulations. This includes the weighing instrument manufacturing industry, Inspectors of Weights and Measures (Trading Standards Officers - TSOs), users and owners of catchweighers. For guidance on instruments which can be used as both a catchweigher and a non-automatic weighing instrument (NAWI) and to which a different set of Regulations applies depending on the purpose for which it is being used i.e. “hybrid instruments”, please see paragraphs 4(b)(iv), 13 (last bullet), 14, and 38 or 57. It may also be useful to refer to the latest issue of the Notes for Guidance on the Non-automatic Weighing Instruments Regulations 2000 (SI 2000/3236), (available on NWML’s website at www.nwml.gov.uk). 2. The 2003 Regulations provide:

(a) for the principles of the construction and marking of catchweighers - please note that a catchweigher under the 2003 Regulations is marked with ‘R 51’;

(b) for the manner of their erection, installation and use; (c) for their testing, passing as fit for use for trade, stamping, and obliteration of stamps; (d) for their prescribed limits of error; and (e) that an accuracy class shall be confirmed and that, where these instruments are used for certain purposes, instruments of a certain accuracy class must be used.

3. The 2003 Regulations also made a change that did not derive from R 51, but reflected pre-existing policy on weighing and measuring instruments, which was to permit these instruments to be imported from another State of the European Economic Area (EEA) without the need for further testing within Great Britain, provided that they have already been tested on the same or equivalent basis as that required by the 2003 Regulations. The 2003 Regulations will help to reduce barriers to trade as they play a part in harmonising requirements for these instruments throughout the EEA. The 2003 Regulations also contain enforcement provisions.

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Scope and Application 4(a) The 2003 Regulations, in effect, apply only to those catchweighers that fell

into accuracy classes III and IIII of the Weighing Equipment (Non-automatic Weighing Machines) Regulations 2000, SI 2000/932, as amended (“the Weighing Machines Regulations 2000"). Accuracy class Y(a) of the 2003 Regulations approximately corresponds with class III of the Weighing Machines Regulations 2000, and accuracy class Y(b) of the 2003 Regulations approximately corresponds with class IIII of the Weighing Machines Regulations 2000.

4(b) Accordingly, the 2003 Regulations do not apply to: (i) catchweighers which meet the requirements for accuracy classes I and II of

the Weighing Machines Regulations 2000 because there are no corresponding accuracy classes in R 51

(ii) catchweighers which were in use for trade before the 2003 Regulations came

into force: however, these catchweighers may have been prescribed under national legislation by the Weighing Machines Regulations 2000. Modification of an instrument that was already in use before the 2003 Regulations came into force will not make any difference to whether or not the 2003 Regulations apply - such instruments will continue to be subject to the Weighing Machines Regulations 2000

(iii) automatic weight grading instruments and automatic checkweighing

instruments as respectively defined in the exclusion to the definition of “automatic catchweighing instrument” in the 2003 Regulations

(iv) hybrid instruments, when being used in NAWI mode. Where a catchweigher

has, in addition to its automatic weighing mode of operation, a non-automatic mode of operation, the non-automatic mode is subject to the requirements of the Non-automatic Weighing Instruments Regulations 2000, SI 2000/3236 (“the NAWI Regulations”), or regulations in other EEA States implementing Directive 90/384/EEC. A hybrid instrument is also subject to type approval under the same legislation. It will therefore be required to carry the CE conformity marking and the metrology marking, as well as the Crown stamp. It should be noted that a catchweigher can operate in either a dynamic or static (start-stop) mode of automatic operation. The static (start-stop) automatic mode should not be confused with an instrument operating as a NAWI.

4(c) Where a catchweigher has a non-automatic mode of operation solely for the

purpose of calibration or setting up, then it is subject only to the 2003 Regulations, not to the NAWI Regulations or regulations in other EEA States implementing Directive 90/384/EEC

4(d) Where a catchweigher bears a mark indicating the purpose for or manner in

which it is to be used, it should not be used for a purpose or in a manner which does not accord with that marking (see section on obliteration of stamps, paragraphs 33 and/or 55). Instruments of accuracy class Y(b) shall only be used for weighing ballast or waste or other goods - for example, sand - in accordance with the particulars of the approved pattern (see ‘Specified purpose or manner of use’, Schedule 3).

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4(e) Catchweighers which do not fall within the scope of the 2003 Regulations may continue to be passed as fit for use for trade under the Weighing Machines Regulations 2000, e.g. class II catchweighers.

Transitional exclusion

5. The 2003 Regulations allow, at regulation 4, a transitional period during which catchweighers which fall within the scope of the 2003 Regulations, may nevertheless continue to be first passed as fit for use for trade under the Weighing Machines Regulations 2000 up until and including 2 March 2014 - thereby allowing manufacturers of these instruments to make the most of type approvals that have already been granted. During this transitional period either the 2003 Regulations or the Weighing Machines Regulations 2000 may be applied but this would depend under which Regulations the particular type approval was granted. If a catchweigher were approved under the 2003 Regulations, the type approval certificate would require it to be marked ‘R 51’; whereas, if a catchweigher were approved under the Weighing Machines Regulations 2000, the type approval certificate would not make such a requirement. At the end of the transitional period the 2003 Regulations will replace the Weighing Machines Regulations 2000 to the extent that they apply to the same catchweighers (although any instruments that were passed as fit for use for trade under the Weighing Machines Regulations 2000 before the end of the transitional period can remain in use). OIML and removal of barriers to trade 6. All of the EU member States, and many other countries, are members of OIML. The OIML is an intergovernmental body which is dedicated to harmonising the national metrology regulations of its members. Harmonisation not only provides an important basis for measurement credibility, but also serves to promote international trade through the elimination of technical barriers. Members of OIML have an obligation to implement its Recommendations into their national law, in order to effect this. 7. In line with this, the 2003 Regulations help to remove barriers to trade by harmonising the scope of our national legislative requirements for catchweighers with the related wider scope of the requirements of OIML Recommendation R 51. Therefore if manufacturers are manufacturing catchweighers for any of the OIML member countries which have implemented this Recommendation, they need meet only the requirements of this Recommendation, which should eliminate the technical barriers to trade and considerably reduce the regulatory burden, although this is not a direct consequence of the 2003 Regulations which have effect in Great Britain only. (For EEA member States reference should be made to the WELMEC type approval agreement - see paragraph 16.) 8. Copies of OIML R 51 may be obtained from NWML's Regulatory Directorate. Contact Catherine Hill at catherine.hill@nwml.gov.uk, telephone number 020 8943 7274 (mornings only). R 51, Part 1, currently costs 80 Euros and R 51, Part 2, 112 Euros. Purchases from NWML will be charged at the sterling exchange rate of the day plus a postage/handling charge of £1.50. Changes made by the 2003 Regulations 9. In implementing the requirements of R 51, the 2003 Regulations make the following changes of substance from the Weighing Machines Regulations 2000:

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(a) they allow catchweighers that fall into the lowest accuracy class to be used for weighing waste as well as ballast;

(b) they make new requirements for the marking of catchweighers, including for catchweighers to bear the marking “R51” where the 2003 Regulations have been complied with (this latter requirement does not derive from R51 itself, but is intended to enable Inspectors to know more readily whether a catchweigher was passed under the Weighing Machines Regulations 2000 or the 2003 Regulations);

(c) they make new requirements for the construction, erection and installation of catchweighers, and relating to their use;

(d) a person in possession of a catchweigher which requires testing may be required to provide a control instrument for the Inspector’s use (see paragraph 29); and

(e) the tests that will be applied to catchweighers and the error limits to be applied derive directly from R 51.

10. The 2003 Regulations also go further than the Weighing Machines Regulations 2000 in providing for the testing of instruments to be carried out at a place other than the place of use, where the Inspector is satisfied that any subsequent dismantling, re-assembly or transportation to the intended place of use will not affect the accuracy or functioning of an instrument. The 2003 Regulations do not provide for self verifiers to notify the Chief Inspector of Weights and Measures of details such as the location, certificate number and date of installation of a catchweigher. However, should the self verifier wish to do so in the interests of openness, there is nothing to prevent him. Use of supplementary indications 11. Regulation 7 of the 2003 Regulations permits, until 31 December 2009, instruments to provide a supplementary indication of the quantity of material weighed, as well as the metric indication. This means that catchweighers may indicate the imperial measurements of the quantity as a supplementary indication, in addition to the metric indication, until that date. Part 2: GUIDANCE FOR MANUFACTURERS/IMPORTERS 12. This part is intended to provide advice for manufacturers. Manufacturers will wish to check first whether their instrument is subject to legislation (including the 2003 Regulations), and if so, which particular legislation applies to it (regulations 3 and 4). It is possible for manufacturers to continue to have instruments to which the 2003 Regulations could apply, passed as fit for use for trade under the Weighing Machines Regulations 2000, up until and including 2 March 2014. It has also been possible, from the coming into force of the 2003 Regulations, for manufacturers to have instruments passed as fit for use for trade under those Regulations. In both cases it will be dependent on which set of Regulations the type approval was granted under. Under certain circumstances, it is also possible that neither set of Regulations will apply, and the Scope and Application section above at paragraph 4 gives guidance on this. Please note the guidance regarding testing of catchweighers which are both subject to the 2003 Regulations and imported from other EEA States at paragraph 30 below.

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13. The ‘test’ for the potential applicability of the 2003 Regulations, would be that the following statements all apply: • the instrument weighs pre-assembled discrete loads or single loads of loose

material (for the purposes of this guidance, the terms ‘material/s’ and ‘product/s’ and ‘goods’ shall be taken to have the same meaning)

• the instrument is automatic, meaning that it follows a predetermined programme of automatic (weighing) processes without an operator intervening and that the feed of the material and determination of the weight of the load is automated

• the instrument is not an automatic weight grading instrument, that is to say, it is not an instrument which sub-divides articles of different mass into several sub-groups each characterised by a given mass range

• the instrument is not an automatic checkweighing instrument, that is to say, it is not an instrument which sub-divides articles of different mass into two or more sub-groups according to the value of the difference between their mass and the nominal set point

• the instrument is (or will be) in use for trade, meaning that the material being weighed will form part of a transaction for money or money’s worth, or relates to the payment of a toll or duty, and the instrument will be the final arbiter of the weight of that material (it is not to be checkweighed on another instrument for the purposes of such a transaction)

• the instrument has not already been verified and brought into use under the Weighing Machines Regulations 2000; and

• if the instrument is a “hybrid instrument” (see paragraph 1), it is being used in its automatic weighing mode

Automatic Weighing Instrument/NAWI: Aid to Classification 14. The following interpretation of the definition of an automatic weighing instrument (AWI) or a NAWI (taken from Clause 3.1.9 of WELMEC Guide 2 on Directive 90/384/EEC) is intended to be used only when doubt exists in applying the definitions contained in the OIML recommendations and Directive 90/384/EEC: ‘An instrument capable of performing consecutive weighing cycles without any intervention of an operator is always regarded to be an AWI. If an instrument needs the intervention of an operator, it is regarded to be a NAWI only if the operator is required to determine or verify the weighing result. Determining the weighing result includes any intelligent action of the operator that affects the result, such as deciding when an indication is stable or adjusting the weight of the weighed product. Verifying the weighing result means making a decision regarding the acceptance of each weighing result on observing the indication. The weighing process allows the operator to take an action which influences the weighing result in the case where the weighing result is not acceptable. Note: the necessity to give an instruction to start the weighing process or to release a load is not relevant in deciding the category of instrument’. Obtaining Type Approval (also known as Pattern Approval) 15. In order for an instrument to be passed as fit for use for trade, a type approval certificate must have been issued by the Secretary of State under national legislation (regulation 6(a) and the definition of “certificate of approval” in regulation 2(1)) which is in force when the instrument is so passed. This means that the design of the instrument must be examined and tested to ensure that it meets certain legal,

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technical and accuracy requirements. Note that the 2003 Regulations do not actually make provision for type approval, other than that it must have been carried out (by reference to the type approval certificate in regulation 6(a)). Subject to compliance with that certificate, the 2003 Regulations take effect from the point at which the instrument is submitted for initial verification, which is subsequent to type approval. However, in practice, those carrying out type approval in Great Britain will take into account the requirements of the 2003 Regulations. R 51 itself makes provision for type approvals. 16. For instruments that will be used in the UK, manufacturers need to apply to NWML for type approval, using form TE/02 headed ‘Application for Type examination’. Since there is at present no EC Directive for catchweighers, type approvals issued are only valid in the UK. However, NWML can also issue an OIML certificate of conformity which, when associated with a UK type approval certificate, will mean in practice that type approval will be granted in most European countries which have signed the WELMEC Type Approval Agreement without further testing being carried out. Further details of the Agreement can be found at www.welmec.org. Conversely, instruments that have been granted an R 51 Certificate of Conformity by another European type approval authority will automatically meet most of the requirements of the 2003 Regulations; no further examinations or tests on the instrument will be required within this country, and the type approval here will be a paperwork exercise, except where the instrument is not accompanied by the required documentation or where there was some doubt as to the validity of the testing which had been carried out. 17. Before applying for type approval, manufacturers may wish to take advice on what the necessary construction etc. requirements are for instruments under the 2003 Regulations. Manufacturers can apply to NWML for consultancy, using form TE/01. At present, the first hour of consultation is offered free to new customers to NWML. 18. Guidance note TE/03 provides some further details on applying both for consultancy and for type approval. Guidance note TE/12 provides advice on the acceptance by NWML of test results from another organisation, as a part of issuing a type approval. 19. The guidance notes and the application forms can all be downloaded from NWML’s website at www.nwml.gov.uk. Alternatively they can be faxed to you – contact the Type & Test Business Team administrator on telephone number 020 8943 7209 (every day except Wednesdays) providing your fax and, if available, e-mail details. 20. Modules, peripherals, or major parts of weighing instruments can be tested by NWML as separate parts and issued with a Test Certificate. The test certificate may be quoted in a type approval certificate, thus reducing the time required to examine an instrument made from test certificated modules and components. The range of modules that can be issued with a Test Certificate include indicators, load cells, printers, EPoS devices, peripheral devices, and software. 21. Clause 5.2.1 of R 51 indicates what information manufacturers would need to submit as a part of their application for a type approval. Each of the requirements listed may be explained as follows: • Metrological characteristics of instrument: manufacturers should indicate

which accuracy class (described in Schedule 1 to the 2003 Regulations, and

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referred to as ‘class of accuracy’ in clause 3.8.2 of R 51, which is reproduced in Schedule 4 to those Regulations) they are intending that the instrument should achieve. It may be that the use to which the instrument will be put will have a bearing on the manufacturer’s intentions for the accuracy class. The maximum and minimum capacities and the scale interval – ‘e’ – should be given.

• A set of specifications for the instrument: the information that is detailed under the list of required markings at clause 3.8.1 and 3.8.2 of R 51 (reproduced in Schedule 4 to the 2003 Regulations) should be provided. Please note that in clause 3.8 (reproduced in Schedule 4 to the 2003 Regulations) type designation means the model name or number of the instrument, i.e. what it is called by the manufacturer, and pattern approval sign, pattern approval certificate and pattern approval number are all one and the same thing. The number of load cells in the instrument should also be indicated as knowledge of this aids NWML in its assessment of the character of the instrument.

• A functional description of the components and devices: this should include details of how they operate.

• Drawings, diagrams and general software information (if applicable), explaining the construction and operation, including interlocks.

• Any document or other evidence that the design and construction of the instrument complies with the requirements of R 51: the manufacturer’s version number for the type of instrument should be given. Details should also be provided of the security of the weighing parameters and how these are protected from being changed. If any tests have already been carried out on the instrument under the WELMEC Type Approval Agreement (see above), the report of those tests should also be submitted if it is intended that NWML should take account of these previous test results.

22. NWML prefers to receive the above information electronically. Manufacturers should be aware that NWML may also need to see a representative instrument installed in order to issue a new type approval certificate; and that this may also be required in the case of instruments that manufacturers are proposing to import into the UK. The installed instrument could be either at the manufacturer’s premises or elsewhere, so long as the installation is representative of how the instrument will be used and it is possible to carry out a representative test on the instrument. NWML can advise on whether or not an installation would be appropriate. 23. Once these details have been submitted, NWML’s Type & Test Business Team can usually provide a cost estimate for the type approval within 10 days. The type approval itself can usually be completed by NWML in 4 - 6 weeks. 24. Where there are proposals to introduce alternative parts to a catchweigher, it may be necessary to apply for a variation to the type approval certificate. Whilst type approval of every proposed alternative part may not be required, any change from the components which have been described in the type approval certificate for that instrument should be notified to the body who issued the type approval, so that the body can assess the likelihood that the fitting of those components will affect the accuracy of the instrument. A change that is likely to necessitate a variation to the type approval is, for instance, changing the load cell type. The need for notification to the approval body of changes does not extend to the replacement of identical parts during repair.

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Class of instrument 25. When a manufacturer submits a catchweigher for initial verification testing in accordance with the provisions of the 2003 Regulations, he will submit either a class Y(a) or a class Y(b) instrument and it will either pass or fail: the accuracy class of an instrument is not determined at initial verification, but shall be confirmed at that stage if the verification is successful - see regulation 6(c) and paragraph 49 below. Testing and Stamping Please note, if you are a manufacturer importing catchweighers from another EEA State and if the relevant tests have been carried out successfully in that other EEA State in accordance with R 51 or on an equivalent basis, no further tests will be required provided the instrument is also accompanied by the “requisite documentation” – see paragraph 30. 26. Regulation 6 specifies the requirements to be satisfied for an instrument to be passed as fit for use for trade and regulation 8 makes supplementary requirements. The testing and examination for passing as fit for use for trade will normally be carried out at the place at which the instrument will be installed. 27. However, where the testing has been carried out elsewhere, regulation 8(4) provides that instruments which have then been dismantled, transported and re-assembled, need not necessarily be tested again if the Inspector is satisfied that the requirements for accuracy and functioning are still met by the instrument. 28. Manufacturers are often uncertain as to whether their instrument must be tested in-situ, or whether it is transportable. As a guide, it should be considered whether the instrument needs to be taken apart in order to transport it, and if so, whether the detachment and re-attachment of even peripheral parts could have an effect on the instrument’s accuracy and functioning. 29. Under regulation 8(2), manufacturers requiring an Inspector to pass an instrument as fit for use for trade must provide suitable material for the Inspector to use in testing the instrument and must make available for the Inspector’s use a control instrument; which is an instrument which will be used to carry out an independent test of the weight of the test material. 30. Regulations 9 and 10(2) will be relevant for manufacturers importing catchweighers from another EEA State. In that event and if the relevant tests have been carried out successfully in that other EEA State in accordance with R 51 or on an equivalent basis, no further tests will be required provided the instrument is also accompanied by the “requisite documentation” - see regulation 9(2). In practice, “requisite documentation” means a copy of the test report completed for that instrument indicating that the instrument has been so successfully tested (see ‘Sample test report’ on pages 80 - 82 of R 51 Part 2, reproduced in Annex 4 of these Notes for Guidance; you may also find it useful to refer to ‘Annex 2 to WELMEC 2.6’ from Committee Draft 3 of WELMEC Guide 2.6, reproduced in Annex 5 of these Notes for Guidance). Further, the relevant test results presented must relate to testing with the same material with which the current instrument will be used. However, in each case, it will be for the Inspector to decide whether re-testing is necessary if he is not satisfied as regards the authenticity of the test report or results, that those results relate to the instrument being imported, or the effect of any dismantling of the instrument after such tests - see regulation 9(3).

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31. When the Inspector is satisfied that the instrument may be passed as fit for use for trade, the instrument will be stamped on the verification mark support unless there is any mark on the instrument which might be mistaken for the stamp or other expression of approval or guarantee of accuracy – see regulation 11(1) and (2), the definition of “the stamp” or “verification mark” in regulation 2(1) and the provisions of clause 3.9.2 of R 51 (reproduced in Schedule 4 to the 2003 Regulations). Some manufacturers have queried whether clause 3.9.2 infers that the verification mark can be made other than by way of a stamp (such as a sticker) but, in the context of the other requirements of R 51 and its implementation in the 2003 Regulations, it is considered that the verification mark can only be made with a stamp (i.e. the prescribed stamp) in the case of catchweighers; however, this may be an issue which will be addressed in the next revision of R 51, in which case a suitable amendment of the 2003 Regulations would be considered at an appropriate time to clarify any ambiguity. 32. The manufacturer will need to determine whether the catchweigher is going to be permanently fixed or mobile. An instrument that has been type approved only for a fixed installation would be illegal for mobile use. If an instrument is to be used as a mobile unit it will need to have undergone tilt testing at the type approval stage. Clause 2.9.3 of R 51 (reproduced under the heading ‘Tilting’ in Schedule 3 of the 2003 Regulations) requires that mobile units which do not have a level indicator should be tested at levels of tilt of 5%. However, it has been accepted within WELMEC that on-board weighing systems should be either fitted with a tilt inhibiting device or tested at levels of tilt of 10%. In such cases NWML is prepared to issue letters of dispensation under section 14(4) of the Weights and Measures Act 1985 for any system not provided with a tilt inhibiting device that requires testing to 10%. Obliteration of the Stamp 33. For the purposes of the following paragraphs, where a stamp (see paragraph 31 above) is to be obliterated for any reason, regulation 12 of the 2003 Regulations specifies the method of obliteration. The stamp may be obliterated or shall be obliterated, by an Inspector, depending on the precise circumstances described in regulations 13 to 16 of the 2003 Regulations. Manufacturers will need to be aware, on behalf of their customers, of those circumstances. 34. Regulation 14(1) provides that an Inspector shall obliterate the stamp on an instrument which has, since it was last stamped, had any alteration or addition made to it such that it could not be passed as fit for use for trade under regulation 10 (which describes circumstances under which an Inspector shall not pass as fit for use for trade such an instrument). That provision overrides any other circumstance in which an Inspector shall or may obliterate the stamp. 35. Regulations 14(2) and (3) draw a distinction between cases in which an Inspector shall obliterate the stamp and cases where the Inspector may obliterate the stamp. The distinction is that where alterations or additions etc. have been made to an instrument that might affect its accuracy and function, and the local Chief Inspector of Weights and Measures was informed about it beforehand, the Inspector then has the discretion not to obliterate the stamp. However, if the Inspector comes across such an instrument and has not been informed about the alteration or addition etc. beforehand, then the stamp must be obliterated. This provision is intended to encourage users of instruments to inform their local Inspector of alterations that they intend to make to an instrument. It is suggested that, where packers or other users are proposing to make alterations to an instrument that may affect its accuracy or function, they should send written details to their local Chief Inspector of Weights and

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Measures, in order to minimise the likelihood that the stamp on the instrument will be obliterated. 36. A further distinction is drawn, in regulation 13(1) and (2), between cases in which an Inspector shall obliterate the stamp and may obliterate the stamp. Subject to the circumstances described in paragraphs 34 and 35 (above), an Inspector shall obliterate the stamp on an instrument which does not fall within the prescribed limits of error for in-service testing or does not comply otherwise with the 2003 Regulations. However, where the instrument does not fully comply but in the Inspector’s opinion, immediate obliteration of the stamp is not required, the Inspector shall require compliance within a specified period not exceeding 28 days; if correction is not made within the specified period, the Inspector shall obliterate the stamp. 37. See regulation 15 - in addition, an Inspector may obliterate the stamp in the following circumstances: either where an instrument is in use for trade for a particular purpose and such use does not meet the requirements of regulation 5, or is used for trade in extraordinary environmental or operating conditions which the Inspector considers prevent the instrument from operating properly or maintaining its metrological characteristics. 38. A “hybrid instrument” (see paragraph 1 above), being both a catchweigher and a NAWI, will bear two verification marks, one under the 2003 Regulations for the catchweigher mode of operation and the other under the NAWI Regulations for the non-automatic mode of operation. Dependent upon the circumstances requiring obliteration of the relevant verification mark, the Inspector will wish to consider whether either or both modes of operation require obliteration/disqualification of the relevant verification marks - see regulation 16(2). Part 3: VERIFICATION BY APPROVED VERIFIERS UNDER SECTION 11A OF THE WEIGHTS AND MEASURES ACT 1985 39. The Deregulation (Weights and Measures) Order 1999 (SI 1999/503) introduced new provisions into the Weights and Measures Act 1985 which permit self-verification of weighing and measuring equipment intended for use for trade in certain circumstances. 40. Amongst other things, the Order introduced section 11A to the 1985 Act which permits the Secretary of State to approve persons (manufacturers, installers or repairers of equipment to which section 11 applies) to conduct the testing, passing as fit for use for trade and stamping with the prescribed stamp (verification) of equipment to which section 11 applies. 41. This provision is underpinned by a requirement that the approved verifier must possess an acceptable documented quality system which will be expected to conform with the relevant clauses of ISO 9001:2000 and which must also fully encompass the requirements of Schedule 3A of the Weights and Measures Act 1985. 42. Among other things the approved verifier’s quality system documentation in the case of catchweighers shall include:

• details of the organisational structure • procedures for the testing of the equipment for which an approval is sought

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• procedures for ensuring that only catchweighers complying with the 2003 Regulations and with a certificate of type approval are passed as fit for use for trade

• procedures for ensuring that staff involved in verification activities are competent and for their training to be kept up to date

• procedures for the identification and control of measuring and test equipment used to perform verification testing

• procedures for the control of documents and records • procedures for undertaking internal reviews and audits of his quality system • procedures to notify NWML of any changes to the quality system which might

have an influence on the businesses’ verification activities. 43. Normally, an applicant becoming an approved verifier will have had their quality system certified by an acceptable Accredited Certification Body which will have undertaken its assessment of the applicant’s quality system in accordance with requirements which have been issued by NWML. Alternatively NWML is able to conduct its own assessment of an applicant’s quality system. 44. Approved verifiers will also be subjected to audits to confirm that their verification activities continue to be conducted to the requirements of the approval. In the case of approved verifiers possessing an acceptable certified quality system these audits will generally form part of the normal surveillance and audits conducted by the certification body. Approved verifiers not in possession of an acceptable certified quality system will be subject to similar audit by NWML. (However, the Secretary of State may require additional audits and may issue directions to the approved verifier in respect of matters specified in its approval.) 45. NWML has funding for additional inspection visits upon approved verifiers as it sees necessary. Part 4: GUIDANCE FOR INSPECTORS (TRADING STANDARDS OFFICERS) 46. Inspectors will need to determine first whether an instrument with which they have been presented falls within the scope of the 2003 Regulations – see paragraphs 4, 5 and 12 above. Please note the guidance regarding testing of catchweighers which are both subject to the 2003 Regulations and imported from other EEA States at paragraph 30 above. Testing and Stamping 47. Inspectors who are presented with an instrument for passing as fit for use for trade should be able to obtain the type approval details from the TSI website which may be accessed from the following link: https://secure.tslinkonline.co.uk or from a hard copy version, available from Publications at NWML. For imported instruments, the Inspector would also need to ensure that type approval had been granted in this country. The Inspector may take account of the results of tests, associated with the certificate of conformity, set out in the format followed in the sample test report on pages 80 - 82 of R 51 Part 2, reproduced in Annex 4 of these Notes for Guidance or equivalent. 48. Inspectors who are asked to carry out the initial verification of an instrument should be aware that the type approval documentation for the instrument may have resulted from the testing of the prototype with different products or materials from

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those with which the instrument currently before the Inspector will be used. The type approval only indicates that the instrument was able to operate accurately with the particular product with which it was tested. The Inspector will need to be satisfied that the instrument will function correctly within the appropriate accuracy class with the product that is now proposed. Where the instrument which is being presented is made up of modules which have been type approved, provided that the type approval is valid for the system as a whole the verification may be carried out without the need for the Inspector to contact NWML. 49. Inspectors will wish to take account of all of the provisions of the 2003 Regulations in passing instruments as fit for use for trade, but especially those at regulations 6 and 10. Regulation 6(c) provides for initial verification testing, including testing to an accuracy class specified by the manufacturer (see paragraph 25 above), and refers to clause 5.3 of R 51 Part 1, which is headed ‘Initial verification and in-service inspection’. This sets out the examinations and tests that the Inspector will need to carry out. Note that clause 5.3.1 refers to ‘clause 2 excluding 2.8’ – this should read ‘2.9’. Although the third paragraph of clause 5.3.1 stipulates that the tests must be carried out in-situ, this requirement has necessarily been relaxed, to take account of arrangements for the mutual recognition of test results with our EEA partners – see regulation 8(4). Clause 5.3 as a whole cross-refers to various other clauses of R 51, to which the Inspector would need to refer, in particular, clauses 6.1.1 and 6.1.2. Inspectors may find it useful to refer to the guidance given in WELMEC 2.6 ‘Guide for the testing of automatic catchweighing instruments’ (“WELMEC Guide 2.6”) – see Annex 5 to these Notes, which contains a draft revision of the initial verification section and extracts from associated annexes of WELMEC Guide 2.6. Please note that Committee Draft 3 of WELMEC Guide 2.6 is subject to further revision. The final version will be published on the WELMEC website at www.welmec.org approximately one to two years after the publication of these Notes for Guidance. That version will be more useful to the reader than the current published version (i.e. Issue 1 of May 2001). Reference to WELMEC Guide 5.1 ‘European Directory of Legal Metrology’ may assist in determining whether the “requisite documentation” defined in regulation 9(2)(a)(i) is genuine’. WELMEC Guide 5.1 gives details of leading weights and measures organisations in European countries and either contact details or links to the same. It can be accessed by clicking on the following link: http://www.welmec.org/countries.asp. 50. The equipment and test material that the Inspector will need in order to carry out testing of an instrument should be provided by the person or organisation in ownership of the instrument (see regulation 8(2) and paragraph 29 above). However, it would be advisable for the Inspector to discuss in advance the material that will be needed and whether it would be practicable to attempt to recycle the same material for each test. Typically only four test loads (one near Min, one near Max and two at critical points in the weighing range) of the type representative of what the instrument is to be used for, are required. These test loads shall be of known weight, determined on a control instrument. The person submitting or manufacturer of the catchweigher may be able to provide testing equipment that the Inspector can use, provided that it is traceable (section 5(2)(a) of the Weights and Measures Act 1985 refers). 51. The following applies only to automatic instruments that weigh statically and can be verified in the static mode of operation─ In the case of an instrument provided with a means of giving a visual indication and/or printout of the value of the measurement made of individual weighments, the Inspector will need to provide:

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• weights or masses to load the instrument to its maximum capacity; and • change point weights equivalent to one-tenth of the scale interval, to cover at

least one scale interval. The inspector will also need to have available protective clothing and stationery as required. 52. In connection with regulation 10(1), Inspectors will need to know whether an instrument has been approved as a fixed or mobile installation, and if the instrument is intended to be mobile they will need to ensure that the type approval permits this (testing to ensure compliance with clause 2.9.3 of R 51 Part 1 - reproduced in Schedule 3 to the Regulations for the purposes of catchweighers - will need to have taken place as a part of type approval). 53. See paragraph 30 above regarding catchweighers imported from other EEA States and testing in accordance with R 51 or on an equivalent basis. Prescribed Limits of Error 54. For digital indicators that have a high resolution indication (i.e. 0.2e), it is possible to ascertain the errors given in Table 3 of R 51 (which is reproduced as Table 1 in Schedule 5 to the 2003 Regulations) during automatic operation. It should be noted that in this case the 0.5e added for the digital rounding error should be subtracted from the error limits specified. For digital indicators that do not possess a high resolution indication, the test load value (weight value) has to be selected so as to eliminate the rounding error. Obliteration of the Stamp 55. Regulation 12 provides for the method of obliteration of stamps and it is accepted that the verification mark takes the form of a stamp (see paragraph 31 regarding the second paragraph of clause 3.9.2 of OIML R 51, reproduced in Schedule 4 to the 2003 Regulations). 56. The Inspector is required to obliterate the stamp on any instrument which does not meet with the requirements of the 2003 Regulations. This might be because it does not meet with the limits of error requirements, or it has been altered or adjusted such that its accuracy or function have been affected and the local Chief Inspector was not forewarned of the alteration in advance – see regulations 13 and 14. Other reasons for obliterating the stamp include: that the loads the instrument is being used to measure are outside of the minimum to maximum capacity range; that the instrument is being subjected to extraordinary operating conditions; or that it is being used for an unsuitable purpose. See also paragraph 37 on guidance to regulation 15, and paragraph 63 for information. 57. A “hybrid instrument” (see paragraph 1 above), being both a catchweigher and a NAWI, will bear two verification marks, one under the 2003 Regulations for the catchweigher mode of operation (i.e. the prescribed stamp – see regulation 2(1) for the definition of “the stamp” or “verification mark”) and the other under the NAWI Regulations for the non-automatic mode of operation. Depending upon the circumstances requiring obliteration of the relevant verification mark, the Inspector will wish to consider whether either or both modes of operation require obliteration/disqualification of the relevant verification marks - see regulation 16(2).

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Electronic access to OIML Recommendations 58. It has been agreed with the Bureau International de Métrologie Légale that Trading Standards Departments should have free electronic access via a password to OIML Recommendations. Such access is available via the following link to the NWML website: http://www.nwml.gov.uk/inter/oimlr.asp. Part 5 GUIDANCE FOR OWNERS AND USERS Testing 59. When submitting a catchweigher to an Inspector for testing and stamping, the owner or user of the instrument would normally need to arrange for suitable test loads to be available (regulation 8(2)), along with access to and use of a control instrument (likely to be a separate non-automatic weighing instrument). Manner of Erection and Installation 60. Schedule 2 to the 2003 Regulations makes requirements in relation to the manner of erection and installation of instruments. When an instrument is permanently installed, it should be level. This may necessitate alignment with a spirit level when it is being installed. 61. A moveable instrument should have undergone tilt testing at the type approval stage and ideally should be fitted with one or more integral level indicating devices which should be used to set it into its reference position. When the instrument is (temporarily) installed, the integral level indicating device should be utilised or a spirit level with the appropriate degree of sensitivity should be used. 62. An example relating to regulation 15(a)(ii) may be if a front end loader, accuracy class IV, is being used to determine general household waste in a recycling plant where it is used occasionally to weigh scrap metal for sale to a processor, rather than going to landfill, which would require the use of a class III instrument. 63. Regulation 15(b) of the 2003 Regulations makes provision for the obliteration of the stamp on a catchweigher where environmental or operating conditions adversely affect the operation or metrological characteristics of the catchweigher - please note that requirements relating to the use of catchweighers are made at Schedule 3 to the 2003 Regulations. Variations to the instrument 64. If the owner or user of the instrument discovers that they will need to change some of the parts of the instrument in order to use it for a different purpose, they will need to refer to the type approval certificate in order to ensure that any changes that are made to the instrument are compatible with the certificate. If the change may be incompatible, a variation to the type approval certificate which was issued to the manufacturer will be needed. Owners and users should also be aware that changes made to an instrument could result in the obliteration of the stamp on that instrument under regulation 14, thereby taking the instrument out of use - see paragraphs 34 and 35 above.

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ANNEX 1 EXTRACTS FROM THE WEIGHTS AND MEASURES ACT 1985 REFERRED TO IN THESE NOTES FOR GUIDANCE SECTION 11 Weighing or measuring equipment for use for trade 11.-(1) The provisions of this section shall apply to the use for trade of weighing or measuring equipment of such classes or descriptions as may be prescribed. (2) No person shall use any article for trade as equipment to which this section applies, or have any article in his possession for such use, unless that article, or equipment to which this section applies in which that article is incorporated or to the operation of which the use of that article is incidental,- (a) has been passed by an inspector or approved verifier as fit for such

use, and (b) except as otherwise expressly provided by or under this Act, bears a

stamp indicating that it has been so passed which remains undefaced otherwise than by reason of fair wear and tear.

(3) If any person contravenes subsection (2) above, he shall be guilty of an offence and any article in respect of which the offence was committed shall be liable to be forfeited. (4) Any person requiring any equipment to which this section applies to be passed by an inspector as fit for use for trade shall submit the equipment, in such manner as the local weights and measures authority may direct, to the inspector who (subject to the provisions of this Act and of any regulations under section 15 below) shall- (a) test the equipment by means of such local or working standards and

testing equipment as he considers appropriate or, subject to any conditions which may be prescribed, by means of other equipment which has already been tested and which the inspector considers suitable for the purpose,

(b) if the equipment submitted falls within the prescribed limits of error

and by virtue of subsection (10) below is not required to be stamped as mentioned in paragraph (c) of this subsection, give to the person submitting it a statement in writing to the effect that it is passed as fit for use for trade, and

(c) except as otherwise expressly provided by or under this Act, cause it

to be stamped with the prescribed stamp. (4A) An approved verifier may (subject to the provisions of this Act, to any regulations under section 15 below and to any conditions included in his approval)- (a) test any equipment to which this section applies by means of other

equipment which has already been tested and which the verifier considers suitable for the purpose,

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(b) if the equipment being tested falls within the prescribed limits of error

and by virtue of subsection (10) below is not required to be stamped as mentioned in paragraph (c) below, make a statement in writing to the effect that it is passed fit for use for trade, and

(c) except as otherwise expressly provided for by or under this Act, stamp

it with the prescribed stamp. (5) There shall be charged in respect of any test carried out under subsection (4) above such reasonable fees as the local weights and measures authority may determine. (6) An inspector shall keep a record of every test carried out by him under subsection (4). (6A) In this Act ‘approved verifier’, in relation to weighing or measuring equipment of any class or description, means a person who is for the time being approved under section 11A below in relation to the testing, passing and stamping of weighing or measuring equipment of that class or description. (7) Except as otherwise expressly provided by or under this Act, no weight or measure shall be stamped as mentioned in subsection (4)(c) or (4A)(c) above unless it has been marked in the prescribed manner with its purported value. (8) Subject to subsection (9) below, where any equipment submitted to an inspector under subsection (4) above is of a pattern in respect of which a certificate of approval granted under section 12 below is for the time being in force, the inspector shall not refuse to pass or stamp the equipment on the ground that it is not suitable for use for trade. (9) If the inspector is of opinion that the equipment is intended for use for trade for a particular purpose for which it is not suitable, he may refuse to pass or stamp it until the matter has been referred to the Secretary of State, whose decision shall be final. (10) The requirements of subsections (2), (4), (4A) and (7) above with respect to stamping and marking shall not apply to any weight or measure which is too small to be stamped or marked in accordance with those requirements. (11) Where a person submits equipment to an inspector under this section, the inspector may require the person to provide the inspector with such assistance in connection with the testing of the equipment as the inspector reasonably considers it necessary for the person to provide and shall not be obliged to proceed with the test until the person provides it; but a failure to provide the assistance shall not constitute an offence under section 81 below. (12) If an inspector refuses to pass as fit for use for trade any equipment submitted to him under this section and is requested by the person by whom the equipment was submitted to give reasons for the refusal, the inspector shall give to that person a statement of those reasons in writing. (13) In the case of any equipment which is required by regulations made under section 15 below to be passed and stamped under this section only after it has been installed at the place where it is to be used for trade, if after the equipment has been

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so passed and stamped it is dismantled and reinstalled, whether in the same or some other place, it shall not be used for trade after being so reinstalled until it has again been passed under this section. (14) If any person- (a) knowingly uses any equipment in contravention of subsection (13)

above, or (b) knowingly causes or permits any other person so to use it, or (c) knowing that the equipment is required by virtue of subsection (13)

above to be again passed under this section, disposes of it to some other person without informing him of that requirement,

he shall be guilty of an offence and the equipment shall be liable to be forfeited. (15) Subject to subsection (13) above, a stamp applied to any equipment under this section shall have the like validity throughout Great Britain as it has in the place in which it was originally applied, and accordingly that equipment shall not be required to be re-stamped because it is used in any other place. (16) If at any time the Secretary of State is satisfied that, having regard to the law for the time being in force in Northern Ireland, any of the Channel Islands or the Isle of Man, it is proper so to do, he may by order provide for any equipment to which this section applies duly stamped in accordance with that law, or treated for the purposes of that law as if duly stamped in accordance with it, to be treated for the purposes of this Act as if it had been duly stamped in Great Britain under this section. SECTION 11A 11A.-(1) Subsection (2) below applies where, as regards a person who carries on business (whether in Great Britain or elsewhere) as a manufacturer, installer or repairer of equipment to which section 11 above applies, the Secretary of State- (a) is satisfied that the person would, if approved under this section,

satisfy the requirements set out in Part II of Schedule 3A to this Act, and

(b) considers the person a fit and proper person to be so approved. (2) The Secretary of State may approve the person for the purpose of- (a) testing any equipment to which section 11 above applies and which is

manufactured, installed or repaired by him, (b) passing any such equipment as fit for use for trade, and (c) stamping any such equipment with the prescribed stamp. (3) Before granting an approval under this section, the Secretary of State may carry out such audits and inspections of the person’s systems and procedures as he considers necessary to establish that the conditions of the approval would be observed.

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(4) Schedule 3A to this Act (which relates to approvals under this section and matters connected with such approvals) shall have effect. (5) In that Schedule ‘approval’ means an approval under this section and ‘the verifier’, in relation to such an approval, shall be construed accordingly. SECTION 15(4) If any difference arises between an inspector and any other person as to the interpretation of any regulations made under this section or as to the method of testing any weighing or measuring equipment, that difference may with the consent of that other person, and shall at the request of that other person, be referred to the Secretary of State, whose decision shall be final. SCHEDULE 3A SCHEDULE Article 2(13) “SCHEDULE 3A TO THE 1985 ACT” APPROVALS UNDER SECTION 11A PART I APPROVALS: GENERAL Fees 1. Where- (a) any person makes an application for an approval, or (b) an approval is to be, or has been, granted to any person, the Secretary of State may require that person to pay, in respect of any work carried out by or on behalf of the Secretary of State in relation to the application or the approval, such reasonable fee as the Secretary of State may determine with the approval of the Treasury. Form, effect and conditions of approvals 2.-(1) An approval shall be in writing and, unless previously withdrawn in accordance with any term in that behalf contained in the approval and subject to the following provisions of this Part of this Schedule, shall continue in force for such period (not exceeding five years) as may be specified in the approval. (2) An approval- (a) shall specify the classes or descriptions of weighing or measuring

equipment for the testing, passing as fit for use for trade and stamping of which the verifier is approved,

(b) may include such conditions as appear to the Secretary of State to be requisite or expedient having regard to the need to ensure that only such equipment as is fit for use for trade is passed as fit for such use, and

(c) shall contain conditions requiring the verifier to satisfy the requirements set out in Part II of this Schedule.

(3) Without prejudice to the generality of sub-paragraph (2) above, conditions included in an approval by virtue of that sub-paragraph may-

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(a) require the verifier to comply with any direction given by the Secretary of State as to such matters as are specified in the approval or are of a description so specified;

(b) require the verifier to ensure that his procedures for the testing of weighing or measuring equipment conform with such quality standards as are specified in the approval or are of a description so specified.

Suspension of approvals 3.-(1) If it appears to an inspector that, otherwise than in accordance with section 15A of this Act, the prescribed stamp has been, or is being, applied by an approved verifier to equipment which had not, or has not, been duly tested and passed as fit for use for trade, he may give to the verifier a notice (a “suspension notice”) suspending the verifier’s approval (either generally or in relation to particular areas or places) for a period not exceeding 28 days. (2) Where an inspector gives a suspension notice, he shall forthwith send a copy of the notice to the Secretary of State and inform the approved verifier in writing of- (a) the circumstances which have led to the giving of the notice; (b) the date on which the notice takes effect; and (c) the effect of the following provisions of this paragraph. (3) An approved verifier who has taken steps to prevent a recurrence of the circumstances which led to the giving of a suspension notice may apply to the inspector for the suspension to be withdrawn before the expiry of the specified period; and an application under this sub-paragraph- (a) shall be made by notice to the inspector given not later than 21 days

after the date of the suspension notice, and (b) shall state the steps taken to prevent such a recurrence. (4) An inspector shall consider any application made to him under sub-paragraph (3) above and, having done so, shall notify the approved verifier of his decision. (5) An approved verifier who is aggrieved by a suspension notice may apply to the Secretary of State to review the suspension; and an application under this sub-paragraph- (a) shall be made by notice to the Secretary of State given not later than

21 days after the date of the suspension notice, and (b) shall state the grounds on which the application is made. (6) The Secretary of State shall consider any application under sub-paragraph (5) above and, having done so, shall notify the approved verifier and the inspector of his decision. (7) Where the Secretary of State decides under sub-paragraph (6) above to uphold the suspension, he shall also notify the approved verifier and the inspector of the grounds for his decision. (8) Where the Secretary of State decides under sub-paragraph (6) above not to uphold the suspension, he shall instruct the inspector to withdraw the suspension. Withdrawal of approvals 4.-(1) Subject to sub-paragraph (2) below, the Secretary of State may by written notice withdraw an approval if at any time during the continuance of the approval- (a) he is of the opinion that if the approval had expired at that time he

would have been minded not to grant a further approval; (b) it appears to him on reasonable grounds that the verifier is, or has

been, in breach of any condition contained in the approval; or

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(c) any fee due to the Secretary of State by virtue of a requirement made by him under paragraph 1 above has not been paid.

(2) Except where the Secretary of State considers in the circumstances of any particular case that it is necessary for him to withdraw an approval without delay, he shall not withdraw an approval unless he has given the verifier at least 28 days written notice of his intention to do so and of the grounds for withdrawal. (3) Where the Secretary of State withdraws an approval without giving the notice required by sub-paragraph (2) above, he shall, at or before the time when the withdrawal takes effect, give the verifier written notice of the grounds for withdrawal and of his reasons for considering it necessary to withdraw the approval without delay. (4) Where a verifier receives notice under sub-paragraph (2) or (3) above, he may within 21 days of receipt of the notice make representations in writing to the Secretary of State. (5) The Secretary of State shall consider any representations so made and, having done so, shall notify the verifier of his decision. Grant of new approval following withdrawal 5.-(1) Where the Secretary of State decides, whether in the light of representations or otherwise, that an approval which has been withdrawn should not have been withdrawn, he shall as soon as reasonably practicable grant a new approval to the former verifier. (2) The new approval shall expire on the date on which the withdrawn approval would have expired and (except as may otherwise be agreed with the former verifier) shall be subject to the same terms and conditions as the withdrawn approval. (3) Where the Secretary of State grants a new approval under sub-paragraph (1) above, the verifier shall be deemed to have remained approved for the period beginning on the date on which the original approval was withdrawn and ending on the date on which the new approval took effect. Application for further approval 6.-(1) This paragraph applies where, not less than three months before the end of the period specified in an approval as the period for which the approval is to continue in force, the verifier applies to the Secretary of State for the grant of a further approval in the same, or substantially the same, terms as those of the existing approval. (2) The existing approval shall remain in force until the Secretary of State gives the verifier notice of the Secretary of State’s decision with respect to the application. PART II REQUIREMENTS TO BE MET BY APPROVED VERIFIERS Maintenance of quality system 7.-(1) An approved verifier shall maintain in force such systems and procedures (in this Part of this Schedule referred to as his quality system) as will ensure that- (a) any weighing or measuring equipment passed by the verifier as fit for

use for trade satisfies any requirements relating to it imposed by or under this Act; and

(b) adequate testing procedures are undertaken by the verifier having regard to the nature of weighing or measuring equipment with which

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the verifier is concerned and, in particular, to whether any such equipment is electronic.

(2) An approved verifier shall give the Secretary of State written notice, within five working days of their occurrence, of any modifications to the verifier’s quality system which are liable to affect its appropriateness or effectiveness. (3) An approved verifier shall permit the Secretary of State, at any reasonable time after giving written notice, to carry out such audits and inspections of the verifier’s quality system as the Secretary of State considers necessary to establish that the conditions of the approval have been, and will continue to be, observed. Preparation etc. of quality system manual 8.-(1) An approved verifier shall prepare and keep up-to-date a quality system manual, that is to say, a document- (a) showing how his quality system satisfies the requirements of paragraph

7(1) above; (b) setting out the objectives of that system; (c) containing details of his organisational structure, including details of- (i) the persons who have management responsibility for that system,

including their names and individual responsibilities; (ii) the persons who are authorised to test, pass or stamp weighing or

measuring equipment with which the verifier is concerned, including their names and qualifications;

(d) containing details of the equipment and other items required for the testing of weighing or measuring equipment with which the verifier is concerned;

(e) containing a description of the regulations made under this Act, and certificates of approval issued under section 12 of this Act, which are applicable to the testing, passing or stamping of weighing or measuring equipment with which the verifier is concerned;

(f) containing a description of the verifier’s procedures- (i) for the testing of weighing or measuring equipment; (ii) for ensuring that weighing or measuring equipment passed as fit for

use for trade conforms with any such regulations and (where applicable) any such certificates of approval;

(iii) for ensuring that weighing or measuring equipment which does not conform with any such regulations, or (where applicable) any such certificates of approval, is prevented from being passed as fit for use for trade;

(iv) for ensuring that any persons conducting tests of weighing or measuring equipment have the necessary skills and qualifications to do so;

(v) for ensuring that the verifier exercises control over and retains responsibility for the actions of any sub-contractor of his in relation to the testing of weighing and measuring equipment;

(vi) for enabling identification of individual items or batches of weighing or measuring equipment;

(vii) for the control of the equipment used for the testing of weighing or measuring equipment;

(viii) for the control and use of the prescribed stamp; (ix) for the control of documents and data; (x) for undertaking internal reviews and audits of the verifier’s quality

system; and (g) containing a description of the verifier’s system of records for showing

that any weighing or measuring equipment passed as fit for use for

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trade conforms with any such regulations and (where applicable) any such certificates of approval.

(2) An approved verifier shall, on demand by the Secretary of State, provide him with such copies of or extracts from the verifier’s quality system manual as may be specified or of a description specified in the demand. Keeping of records 9. An approved verifier shall keep a record of every test carried out by him of equipment to which section 11 of this Act applies.

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ANNEX 2 EXTRACTS FROM ACTS RELATING TO THE DEFINITION OF ‘WASTE’ REFERRED TO AT SCHEDULE 3 OF THE 2003 REGULATIONS Environmental Protection Act 1990 Section 75 (1) The following provisions apply for the interpretation of this Part. (2) “Waste” includes -

(a) any substance which constitutes a scrap material or an effluent or other unwanted surplus substances arising from the application of any process; and

(b) any substance or article which requires to be disposed of as being

broken, worn out, contaminated or otherwise spoiled; but does not include a substance which is an explosive within the meaning of the Explosives Act 1875.

(3) Any thing which is discarded or otherwise dealt with as it if were waste shall be presumed to be waste unless the contrary is proved. (4) “Controlled waste” means household, industrial and commercial waste or any such waste. (5) Subject to subsection (8) below, “household waste” means waste from -

(a) domestic property, that is to say, a building or self-contained part of a building which is used wholly for the purposes of living accommodation;

(b) a caravan (as defined in section 29(1) of the Caravan Sites and

Control of Development Act 1960) which usually and for the time being is situated on a caravan site (within the meaning of that Act);

(c) a residential home; (d) premises forming part of a university or school or other educational

establishment; (e) premises forming part of a hospital or nursing home.

(6) Subject to subsection (8) below, “industrial waste” means waste” from any of the following premises -

(a) any factory (within the meaning of the Factories Act 1961); (b) any premises used for the purposes of, or in connection with, the

provision to the public of transport services by land, water or air;

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(c) any premises used for the purposes of, or in connection with, the supply to the public of gas, water or electricity or the provision of sewerage services; or

(d) any premises used for the purposes of, or in connection with the

provision to the public of postal or telecommunications services. (7) Subject to subsection (8) below, “commercial waste” means waste from premises used wholly or mainly for the purposes of a trade or business or the purposes of sport, recreation or entertainment excluding -

(a) household waste; (b) industrial waste; (c) waste from any mine or quarry and waste from premises used for

agriculture within the meaning of the Agriculture Act 1947 or, in Scotland, the Agriculture (Scotland) Act 1948; and

(d) waste of any other description prescribed by regulations made by the

Secretary of State for the purposes of this paragraph.

(8) Regulations made by the Secretary of State may provide that waste of a description prescribed in the regulations shall be treated for the purposes of provisions of this Part prescribed in the regulations as being or not being household waste or industrial waste or commercial waste; but no regulations shall be made in respect of such waste as in mentioned in subsection (7)(c) above and references to waste in subsection (7) above and this subsection do not include sewage (including matter in or from a privy) except so far as the regulations provide otherwise. (9) “Special waste” means controlled waste as respects which regulations are in force under section 62 above. Radioactive Substances Act 1993 Section 2 In this Act “radioactive waste” means waste which consists wholly or partly of - (a) a substance or article which, if it were not waste, would be radioactive

material, or (b) a substance or article which has been contaminated in the course of the

production, keeping or use of radioactive material, or by contact with or proximity to other waste falling within paragraph (a) or this paragraph.

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ANNEX 3 EXTRACTS AND PRINCIPLE FROM R 51 WHICH ARE REFERENCED IN THE 2003 REGULATIONS BUT NOT REPRODUCED THERE, OR WHICH ARE REQUIRED FOR TESTING FOR PASSING AS FIT FOR USE FOR TRADE

CLAUSE IN R 51 WHERE IN REGULATIONS (IF REFERRED TO)

5.3 Initial verification and in-service inspection

5.3.1 Tests

Instruments shall be tested to verify that they comply with the requirements in clause 2, excluding 2.8*, and clause 3 for the type of article(s) for which they are intended and when operated under the normal conditions of use.

Instruments that weigh statically may be tested in

nonautomatic mode.

Tests shall be carried out by the appropriate metrological authority, in-situ, with the instrument fully assembled and fixed in the position in which it is intended to be used. The installation of an instrument shall be so designed that an automatic weighing operation will be the same whether for the purposes of testing or for use for a transaction.

The appropriate metrological authority:

• shall conduct the tests in a manner that prevents an unnecessary commitment of re-sources,

• may, where appropriate and to avoid duplicating tests previously done on the instrument for pattern evaluation under 5.2.3.1, use the results of observed tests for initial verification.

Dynamic tests shall be done:

• in accordance with the descriptive markings (3.8), • under the rated conditions for which the instrument is intended, • in accordance with the test methods in clause 6 using test

loads described in 6.1.3.

Accuracy requirements shall be applied in accordance with the appropriate part or parts in 2.2 or 2.3.

Note: The accuracy class that was achieved at approval stage

may not be achieved at initial verification if the loads to be used are significantly less stable or of different dimensions. In this case a lower accuracy class shall be marked in accordance with 2.2 or 2.3 and 3.8.4. Marking of a higher accuracy class than was achieved at approval stage is not permitted.

6(c); 8(2)(a)(i); 9(2)(a); 13(1)(a)

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CLAUSE IN R 51 WHERE IN REGULATIONS (IF REFERRED TO)

5.3.2 Provision of means of testing

For the purposes of testing, the metrological authority may require from the applicant an appropriate quantity of articles, a control instrument and personnel to perform the tests.

* Should read ‘2.9’. 6.1.1 Values of the mass of test loads

Test loads shall be applied as follows:

a) test load values close to Min and Max, b) test loads at two critical points in between Min and Max.

It is only necessary to use one test load at each of the above nominal values.

6.1.2 Number of test weighings

The number of consecutive test weighings taken and used to determine the mean value and the standard deviation shall be as specified in Table 4.

Table 4 Class Number of test weighings Y(y) Minimum 10 weighments for any load

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ANNEX 4 PRINCIPLES FROM OIML R 51 PART 2, ENTITLED: AUTOMATIC CATCHWEIGHING INSTRUMENTS PART 2: TEST REPORT FORMAT SAMPLE TEST REPORT FOR AUTOMATIC CATCHWEIGHING INSTRUMENTS (CLASS Y) The following is the sample test report for catchweighers, which fall into accuracy class Y(a) or Y(b) of the 2003 Regulations. Copies of it should be printed or made as necessary. Weighing performance test in automatic operation Pattern designation: ................................

Serial number: ................................

Observer: ................................

Date: ................................ Time: ................................ Test reference: ................................

Verification scale interval e:

Resolution during test (smaller than e):

................................

................................ Automatic zero-setting and zero-tracking device is:

Non-existent Not in operation Out of working range In operation

Rate of operation (max): .................................

CLASS Y Summary of test results (see result sheets for individual weight values)

Load L

Number of weighings

Maximum error mpe

Close to Min

Critical point 1

Critical point 2

Close to Max

Passed Failed Remarks

31

Result sheet to record individual weight values for automatic operation Test reference: ................................ Load value: ................................

Test Indication Error Test Indication Error

1 16

2 17

3 18

4 19

5 20

6 21

7 22

8 23

9 24

10 25

11 26

12 27

13 28

14 29

15 30

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Weighing performance test in automatic operation Pattern designation: ................................

Serial number: ................................

Observer: ................................

Date: ................................ Time: ................................

Verification scale interval e:

Resolution during test (smaller than e):

................................

................................ Automatic zero-setting and zero-tracking device is:

Non-existent Not in operation Out of working range In operation

CLASS Y E = I + ½ e - ∆L - L Ec = E - Eo with Eo = error calculated at or near zero (*)

Indication I Add load ∆L

Error Corrected error Ec mpe Load L

↓ ↑ ↓ ↑ ↓ ↑ ↓ ↑

(*) (*)

Passed Failed Remarks

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ANNEX 5 EXTRACTS FROM DRAFT 3 OF THE EU GROWTH PROGRAMME ‘MID-AWI’ PROPOSAL FOR WELMEC GUIDE 2.6 ‘GUIDE FOR THE TESTING OF AUTOMATIC CATCHWEIGHING INSTRUMENTS’ 6. Advice for initial verification

6.1 Instruments with a transport system (excluding front-end loading weighing instruments)

The following tests or checks shall be performed, if applicable, during the initial verification: − Standard operation test in normal operation mode. This test will be performed

with (pre-) packages at the (highest) operation speed according to the data plate.

− Effect of eccentric loading.

− Suitability for use.

− Securing of operations.

− Zeroing and tare devices (not for category 2 instruments).

− Indications of weighing results.

− Printing devices.

− Price computing instruments.

− Weigh or weigh-price labelling instruments.

− Descriptive markings.

− Verifications marks.

− Weighing performance testing during normal conditions of use (not during the temperature testing) shall include testing with a maximum length of test load and a minimum length of test load following each other in a sequence. The minimum distance between these two lengths of test loads shall also be tested in a sequence. {class Y(y)}

− Accuracy of net weighing. The instrument should be tested with the maximum specified tare on the data plate in action, with the object of determining the maximum net load together with the maximum tare load. (Note that the maximum permissible errors apply to net weighing). {class Y(y)}

− Dynamic setting. To be aware of: − Take into account the value of the tare weight of the product to be checked and

take the MPE for the net load.

− The rate of operation in relation to the Maximum capacity of the automatic catchweighing instrument should be confirmed during verification.

− If the automatic weighing cycle of a catchweigher comprises two weighings, one weighing the Gross weight and the other weighing the Tare weight, the verification is carried out on the Net weight indication of the catchweigher.

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− If a catchweigher is built with two weighing systems, the first weighing the Tare weight and the second weighing the Gross weight, the verification is carried out on the Net weight indication of the catchweigher. The verification method will be:

− Determine from each package the “true” Tare weight

− Feed each package through the complete weighing system (so through the tare and gross weighing system

− Take the Net weight indication from the weighing system

− Determine from each corresponding package the “true” Gross weight

− Calculate the “true” Net weight

− Calculate the errors by subtracting the Net weight indication from the “true” Net weight

6.2 Front-end loader weighing instruments The following tests or checks shall be performed, if applicable, during the initial verification: − Standard operation test in normal operation mode. Instruments that weigh

statically may be tested in non-automatic mode This test can be performed with standard weights, or loose material which is then loaded into a suitable container on a control instrument satisfying R51-1 CD31 section 6.1.5.

− Effect of eccentric loading. The eccentricity performance will have been tested during type approval. No further eccentricity testing is advised during initial, and subsequent, verification due to safety and operational difficulties.

− Suitability for use.

− Securing of operations (for example: proximity switches, warm-up of hydraulic fluid).

− Zeroing (for example: enforced after switch-on, after print out, after fixed time).

− Indications of weighing results (includes number of weighings assigned to the total if no printer).

− Weight acceptance control (weighing while driving the loader).

− Printing devices (number of weighed shovels if only total weight is printed).

− Tilt test (Only the functional test of the tilt limiting device shall be performed where applicable. If no tilt limiting device is fitted, tilt tests are required.)

− Descriptive markings.

− Verifications marks.

− Accuracy of net weighing. (Only required where applicable). The instrument should be tested with the maximum specified tare on the data plate in action, with the object of determining the maximum net load together with the maximum tare load. (Note that the maximum permissible errors apply to net weighing). {class Y(y)}

− Dynamic setting. (Only required where applicable).

1 Committee Draft 3

35

See also: ♦ Annex 1 to WELMEC 2.6 – Extracts relating to verification advice for front-

end loader weighing instruments, and ♦ Annex 2 to WELMEC 2.6 - Test report format for the in-situ test of front-end

loader weighing instruments

36

Annex 1 to WELMEC 2.6 Extracts relating to verification advice for front-end loader weighing instruments Please note: Some of the items below are applicable to type approval only 2. TECHNICAL CONDITIONS 2.1 A change of hoist lever, lifting cylinder, operating points of the proximity

switches or of the load carrier will require reverification. 3. TYPE APPROVAL TESTS 3.3 Field Tests 3.3.1 Field tests shall be carried out at a typical site for all front-end loaders in

accordance with Table 1 Test Type Approval Initial Verification Dynamic setting Yes (if present) No** Zero-setting Yes (if set dynamically) No** Eccentricity Yes No Operating speeds Yes (if different speeds) No Weighing performance Yes Yes Tilting Yes* Tilt limit device only

Table 1 - Tests to be performed at type approval and/or initial verification on a complete and fully operational instrument Not all tests will be applicable as they depend upon the mode of operation of the instrument. N.B. if the instrument weighs statically then the instrument can be tested statically (even at initial verification). * health and safety concerns may limit this to a test of the tilt limiting device (if fitted). ** these are devices which have been proved at type approval and are more a function of the software of the instrument. If the zero-setting device is not functioning correctly then this will become apparent in the weighing performance tests. 4. METROLOGICAL TESTS 4.1 For verification, examine for conformance with the type approval certificate

and any conditions imposed by it. The tests listed in the appropriate column of Table 1 shall be carried out. For type approval carry out the metrological tests detailed in the appropriate column of Table 1.

4.2 Tests 4.2.1 General

The test is to be carried out with a full standard load corresponding to the integer multiple of the weighing instrument's verification scale interval. The

37

standard load must be applied to loading shovels so that their centre of mass lies, if possible, in the centre of the shovel cross section.

For the accuracy test: it may be necessary to cancel the weighing results without adding and printing them where an interlock turns the no-load message on.

Carry out each weighing with a particular test load and record the reading. For type approval carry out ten weighings, for verification five weighings. The reading is taken directly from the digital display. It may not be possible to determine the analogue errors of the weighing instrument by adding additional weights up to the point where the digital display changes, or using a higher resolution for test. This is because in automatic operation the equilibrium device or the acceptance control programme sometimes prevents this. Note: For verification, if one of the five weighings has an error greater than the verification mpe but less than the in service mpe, extend the test to ten weighings. When using high resolution indications - it should be noted that the errors for class Y include an extra 0.5 e for the digital rounding error of the indication. This 0.5 e should be subtracted from the error when high resolution is used. If approach to the weighing position from above is not interlocked, the maximum permissible errors must be complied with during this process. An additional test at 50 e and close to Max is normally sufficient to check this.

4.2.2 Maximum permissible errors

The maximum permissible errors include: - the uncertainty of zero point adjustment, - the equilibrium condition (acceptance control according to 1.2.2) and - the digital rounding error (R51, 1996 Edition).

4.2.3 Performance of the metrological test

Prior to the test, the weighing instrument should be ready for use, follow the manufacturers operating instructions where applicable.

A. ZEROING

- Set the weighing instrument to zero, then - carry out 5 no-load weighings: The average value of the 5

weighings shall not exceed + 0.25 e. B. ACCURACY (vehicle at a standstill)

- test at increasing load up to Max, - test at m = 50 e after reducing the load from Max as quickly as

possible. Tests should be carried out at Min, Max, and two other loads. Each load tested 10 times for type approval, 5 times for verification. If the lift speed can be varied, tests should be carried out at various operating speeds throughout the range. Note: This high repetition rate does not correspond to normal use and may result in high oil temperature or even seal failure. It may be appropriate to reduce the tests to groups of 3 or 4 followed by a few

38

minutes delay, or to seek the manufacturers advice about repetition rate.

C. ZERO POINT

- Carry out 5 weighings after having removed the load from the weighing instrument, without zeroing,

The maximum permissible errors according to test B apply. D. DYNAMIC EFFECTS

Ensure these tests are carried out in a safe manner and that no sudden or harsh acceleration/deceleration takes place. Test of the equilibrium control of instruments for static weighing and test of the acceptance criterion of instruments for dynamic weighing - with standard load of about 80% of Max, with the vehicle driving

forward and backward, - recording of at least 5 weighing results in each test, - in the case of dynamic weighings, ensure weighing is accurate or

the weight value is not displayed because of a sensor interlock. If necessary drive the vehicle over uneven ground, or operate the vehicle outside its weighing range but within safe limits.

- during static weighing, the load carrier must swing sufficiently that no result is displayed; then reduce the vehicle's speed until the result is displayed.

The maximum permissible errors according to test B apply.

E. ECCENTRIC LOADING Verification: No eccentricity tests need to be carried out during verification. Type Approval:

- Test at, or near, 1/3 of Max and distribute the standard mass over about half the surface of the load carrier on the right hand side, at right angles to the driving direction (direction of lifting). Repeat this test on the left hand side of the load carrier.

The maximum permissible errors according to test B apply.

F. ADDITION and PRINT-OUT - In the operating state, simulate some loading processes with any

load and print out three weighings prior to and/or after addition of these. Check interlocks (1.2.1) and printout (2.8).

G. STABILITY OF ZERO DURING LOADING

Pushing the shovel into loose material and lifting of the shovel inside it may cause loads during the loading process, which exceed the weighing instrument's maximum capacity. Despite this, the zero must remain sufficiently stable: a) clean the shovel, set weighing instrument to zero according to

letter A, b) drive the shovel toward the loose material with the shovel lowered

and push the shovel firmly into the heap while turning and lifting the shovel,

c) empty the shovel and clean it, if necessary, d) carry out 5 no-load weighings,

39

e) carry out the sequence of operations according to letters b to d at least twice without zeroing the weighing instrument between such operations; record the values from the test.

The maximum permissible errors according to test B apply. If no suitable loose material is available, instead of loading according

to letter b one may proceed as follows: carefully attempt to lift a safe immovable object with the shovel until the rear wheels of the front-end loader are lifted from the ground. Continue the test as described above.

H. TILT TEST Safety Note: Before carrying out tilt tests ensure the manufacturers

specifications will not be exceeded. Ensure testing is carried out in a safe way, for example, personnel should not be near the vehicle during tilt tests.

Verification:

Where fitted, only the operation of any tilt limit device needs to be tested. This should normally be achievable without any load being carried.

If no tilt limiting device is fitted carry out tests with loads of ½ Max. Test in 4 directions (10% tilt back, forward, right, left), re-zeroing before each tilt direction, and repeat each load test 3 times. If the instrument is fitted with a tilt sensor then the correct function shall be checked at least tilting the instrument longitudinally (back, forward, right and left) to the upper limit of tilting using a load of ½ Max, re-zeroing before each tilt direction, repeating each load test 3 times.

4.2.4 For verification, additional tests as detailed in the certificate of approval.

40

Annex 2 to WELMEC 2.6 Test report format for the in-situ test of front-end loader weighing instruments Maximum permissable errors are for: Verification / in-service (delete as necessary) A. ZERO-SETTING • Set weighing instrument to zero, then carry out 5 empty weighings. Weighing No.

Zero point deviation Limits

kg 1 2 3 +0.25e 4 5 B. ACCURACY (vehicle stationary) • The load’s centre of gravity must lie in the middle of the loader cross section • Do not add or print. • If the lift speed can be varied, tests should be carried out at various speeds. Lift speed = slow/normal/fast* Lift speed = slow/normal/fast * delete as necessary Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

Min= Min=

41

Lift speed =slow/normal/fast Lift speed =slow/normal/fast Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

(Max-Min)/3 approx.

(Max-Min)/3 approx

Lift speed =slow/normal/fast Lift speed =slow/normal/fast Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

~2(Max-Min)/3

~2(Max-Min)/3

Lift speed =slow/normal/fast Lift speed =slow/normal/fast Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

Max Max

42

Lift speed =slow/normal/fast Lift speed =slow/normal/fast Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

50e 50e C. ZERO POINT • Remove load from weighing instrument and do not zero Load Zero point deviation Max Perm. Errors (kg) kg 0 D. DYNAMIC EFFECTS Note: Ensure these tests are carried out in a safe manner and that no sudden or

harsh acceleration/deceleration takes place. Test of equilibrium device for instruments with static weighing or Test of acceptance criterion for instruments with dynamic weighing • with standard load of approx. 80% max, driving forwards and backwards • drive during weighing to make the load receptor vibrate • also weigh driving round a curve if this can be done safely for dynamic weighing provoke an adequate number of error messages • if maximum permissible errors are exceeded, first check whether the standard

weights are still at the loader’s centre of gravity

43

Driving forwards: Driving backwards: Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

Number of error messages: Number of error messages: Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

Number of error messages: Number of error messages: Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

Number of error messages: Number of error messages: E. ECCENTRIC LOAD (not for control of instruments in service) Note: Consider safety before carrying out this test. • Apply load on half of load receptor ( perpendicularly to direction of travel)

Position: 1 2 Load m (kg,t)

Indic’n I1 (kg,t)

Error I1-m (kg,t)

Indic’n I2 (kg,t)

Error I2-m (kg,t)

Maximum permissible error

At or near 1/3 Max

44

F. ADDING AND PRINTING • Print three to five weighings at any load before and/or after adding. No. Indication

(kg,t) Printout (kg,t)

Indication (kg,t)

Printout (kg,t)

1 2 3 4 5 Total: Printout (Total) Printout (Total)Number (kg,t) (kg,t) G. ZERO POINT STABILITY DURING LOADING Note:

1. Consider safety before carrying out this test. 2. Do not subject the loader to excessive forces that might damage it.

• Push the loader firmly into the heap of loose material while turning and lifting. • May test by fixing the loader instead. Weighing Zeroing(s) Zero point deviation in (kg) after No. (repeat if necessary

until limits repected)

first load

scond load

third load

fourth load

1 2 3 4 5 Limits: Maximum for one weighing ±1e

Maximum permissible errors on verification ±1d / 1 x ±2e

H. TILT TEST NOTE: 1. Consider safety before carrying out this test. The manufacturers

specifications must not be exceeded. 2. At verification, only the action of any tilt limit switch or sensor needs to be

checked. This can normally be achieved without any load being carried. 3. Test at 10% tilt if no tilt limiting device fitted.

45

Tilt Back 10% or limit of tilt switch = % Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

Max/2 Tilt Forward 10% or limit of tilt switch = % Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

Max/2 Tilt to right side 10% or limit of tilt switch = % Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

Max/2

46

Tilt to left side 10% or limit of tilt switch = % Load m (kg,t)

Indication I (kg,t)

Error I-m (kg,t)

Max Perm Err

Max/2

47

ANNEX 6 INDEX TO NOTES FOR GUIDANCE References to regulations within these notes: Regulation.........................................................................................................referred to at paragraph : 3 ..................................................................................................................................................................12 4 ..............................................................................................................................................................5, 12 6 ............................................................................................................................................................26, 49 6(a)..............................................................................................................................................................15 6(c)........................................................................................................................................................25, 49 7 ..................................................................................................................................................................11 8 ..................................................................................................................................................................26 8(2)..................................................................................................................................................29, 50, 59 8(4)........................................................................................................................................................27, 49 9 ..................................................................................................................................................................30 9(2)..............................................................................................................................................................30 9(2)(a)(i) ......................................................................................................................................................49 9(3)..............................................................................................................................................................30 10 ..........................................................................................................................................................34, 49 10(1)............................................................................................................................................................52 10(2)............................................................................................................................................................30 11(1)............................................................................................................................................................31 11(2) ...........................................................................................................................................................31 12 ..........................................................................................................................................................33, 55 13 ..........................................................................................................................................................33, 56 13(1) and (2)...............................................................................................................................................36 14 ..........................................................................................................................................................56, 64 14(1) ...........................................................................................................................................................34 14(2) and (3) ..............................................................................................................................................35 15 ..........................................................................................................................................................37, 56 15(a)(ii)........................................................................................................................................................62 15(b)............................................................................................................................................................63 16 ................................................................................................................................................................33 16(2)......................................................................................................................................................38, 57 Schedule 1..................................................................................................................................................21 Schedule 2..................................................................................................................................................60 Schedule 3.............................................................................................................................4(d), 32, 52, 63 Schedule 4......................................................................................................................................21, 31, 55 Schedule 5..................................................................................................................................................54