SAM Manual E

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    Process Gas Chromatograph MicroSAM

    Operation Manual C79000-G5376-C560-2

    Valid as from software version V4.0

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    Contents

    MicroSAM documentation

    Safety instructions

    EU conformity declaration . . . . . . . . . . . . . . . 6

    Use according to the regulations . . . . . . . . . . . 6Safety instructions . . . . . . . . . . . . . . . . . . . . . 6

    Electrostatically sensitive device! . . . . . . . . . . . 9

    Exclusion from liability for external accessories 9Symbols and abbreviation use in this manual . 9

    Explosion protection

    Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 10

    Identification for explosion protection . . . . . . 10

    Switching on the chromatograph . . . . . . . . . . 10

    Opening the housing with the power supply

    switched off . . . . . . . . . . . . . . . . . . . . . . . . 10Opening the housing with the power supply

    switched on . . . . . . . . . . . . . . . . . . . . . . . . 10

    Maintenance on parts upon which the explosion

    protection depends . . . . . . . . . . . . . . . . . . . 11

    Installation

    Location requirements . . . . . . . . . . . . . . . . . 12

    Space requirements . . . . . . . . . . . . . . . . . 12

    Dimensional drawing . . . . . . . . . . . . . . . . 13Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

    Gas lines . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

    Sample lines . . . . . . . . . . . . . . . . . . . . . . . . 15

    Exhaust lines . . . . . . . . . . . . . . . . . . . . . . . . 15

    Material of common exhaust line . . . . . . . . 15

    Breathing device . . . . . . . . . . . . . . . . . . . . . 15

    Power switch and fuse . . . . . . . . . . . . . . . . . 15

    Connecting the power supply cable . . . . . . . 15

    Per missible cable length . . . . . . . . . . . . . . 16

    Equipotential bonding cable / earthing . . . . . . 16

    Lightning protection . . . . . . . . . . . . . . . . . . . 16

    Assembly of communication cable . . . . . . . . . 17

    Conversion of serial interface to RS232 or

    RS485 . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Ter minating resistors for MODBUS with RS485

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

    Connecting the digital inputs and outputs . . . 17Connection of control unit . . . . . . . . . . . . . . 18

    Local connection of control unit . . . . . . . . . . 18Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

    Technical data . . . . . . . . . . . . . . . . . . . . . . . 20

    Climatic conditions . . . . . . . . . . . . . . . . . 20

    Power supply . . . . . . . . . . . . . . . . . . . . . . 20

    Dimensions and weights . . . . . . . . . . . . . 20 Installation . . . . . . . . . . . . . . . . . . . . . . . . 20

    Electromagnetic compatibility . . . . . . . . . . 20

    Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

    Oven . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Columns and gases . . . . . . . . . . . . . . . . 21

    Sample and injection . . . . . . . . . . . . . . . . 21

    Detectors, calibration and performance data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

    Electronics: communication and analyticalcontroller (CAC) . . . . . . . . . . . . . . . . . . . . 22

    Electronics: real-time signal processor (RSP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

    Interfaces . . . . . . . . . . . . . . . . . . . . . . . . 22

    Inputs/outputs: basic configuration . . . . . . 22 Controller . . . . . . . . . . . . . . . . . . . . . . . . . 22

    Recommended control unit . . . . . . . . . . . . 23

    Startup

    Connecting the gases . . . . . . . . . . . . . . . . . 24

    Adjusting the gases . . . . . . . . . . . . . . . . . . . 24

    Switching on the chromatograph . . . . . . . . . 24

    Connecting the sample pressure . . . . . . . . . 24

    Additionally for maintenance and first startup 25

    Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . 25

    Operation

    Various stages of operation . . . . . . . . . . . . . 26Where and how the data are organized . . . . 26How the data originate . . . . . . . . . . . . . . . . . 27

    Monitoring the chromatograph's function . . . . 27

    Contents

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    Maintenance of the analysis module

    Internal tubing diagram . . . . . . . . . . . . . . . . . 30

    Analysis modules . . . . . . . . . . . . . . . . . . . . . 30

    Removing the analysis module . . . . . . . . . . . 31Fitting the analyzer module . . . . . . . . . . . . . . 34

    Adjusting mechanical zero of the pressure

    regulators . . . . . . . . . . . . . . . . . . . . . . . . . . 36

    The Live injection

    Filling the injection loop . . . . . . . . . . . . . . . . 38

    Purging the injection loop . . . . . . . . . . . . . . . 38

    Injection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38Backflush . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

    The Live column switching

    Advantages of live switching . . . . . . . . . . . . . 40

    How Live switching functions . . . . . . . . . . . . 41

    Function description of electronics

    Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

    Removal of electronic modules . . . . . . . . . . 45

    Fitting of electronic modules . . . . . . . . . . . . 47

    Spare parts

    Spare parts list . . . . . . . . . . . . . . . . . . . . . . . 48

    Contents

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    MicroSAM documentation

    PLEASE READ OUR SAFETY INSTRUCTIONS FIRST!

    The chromatograph complies with the relevant safety standards. If the handling and safety

    instructions are observed, the chromatograph will not normally lead to any danger whichcould result in damage to property or the health of persons.

    Our safety instructions warn of danger which could result in damage to property or persons.

    In addition to the information in this help file, you can find further information in the file More Informa-

    tion.htm.

    NOTE:

    For displaying this help file, the settings of Microsoft Internet Explorer are used. There you can select the desired font sizein the menu View| Font Size.

    Technical support

    Technical support and further information you can find at http://www.siemens.com/processanalytics

    Order No.: C79000-D5376-C564-2 (5/2004)

    Siemens AG 2004 All rights reserved.

    MicroSAM documenta tion

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    Safety instructions

    For clarity reasons, this User's Guide does not contain all detailed information on all types ofthe chromatograph. In addition, it cannot describe every possible case in connection with instal-

    lation, operation or maintenance.

    Should you require further information on this device, or should particular problems occur

    which are not handled in sufficient depth in this User's Guide, help can be requested throughyour local Siemens office or representative.

    The contents of this User's Guide are not part of a previous or existing agreement, commitment

    or statutory right and do not change the latter. All commitments on the part of Siemens are con-

    tained in the respective sales contract which also contains the complete and solely applicable

    warranty conditions. These warranty conditions in the contract are neither extended nor limited

    by the contents of this User's Guide.

    EU conformity declaration

    The original of the conformity declaration can be viewed at:

    Siemens AG

    A&D PI 2 RDD-76181 Karlsruhe

    Use according to the regulations

    This chromatograph is used for separation and determination of components of a gaseous sample.

    Safety instructions

    The chromatograph complies with the relevant safety standards. If the handling and safety instructions

    are observed, the chromatograph will not normally lead to any danger which could result in damage toproperty or the health of persons.

    Our safety instructions warn of danger which could result in damage to property or persons. These in-structions are found

    n in this User's Guide and in the Man ualn on the chromatographn on components of the chromatograph.

    Depending on the degree of danger, we differentiate between:

    DANGER

    means that death, severe personal injury or substantial damage to property will occur if you

    do not observe the specified safety measures.

    WARNING

    means that death, severe personal injury or substantial damage to property can occur if you

    do not observe the specified safety measures.

    Safe ty instructions

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    CAUTION

    means that slight personal injury or damage to property can occur if you do not observe thespecified safety measures.

    IMPORTANT:

    is important information on the chromatograph or a part of the User's Guide to which weparticularly wish to draw your attention.

    NOTE:

    is information on the chro ma to graph or a part of the User's Guide to which we wish to refer for better understanding.

    WARNING

    Only suitably qualified personnel may carry out interventions on this device.

    These persons must be completely acquainted with all sources of danger and maintenance

    measures according to this User's Guide.

    Correct and safe operation of this device is dependent on:

    n Proper transportn Proper storagen

    Proper installation and assemblyn Careful operation and maintenance.

    Please observe the instructions in the manual in order to prevent damage to persons or the

    device!

    Qualified personnel

    in the sense of this User's Guide and the warning information on the chromatograph and its compo-

    nents are persons who are acquainted with installation, assembly, commissioning and operation of the

    chromatograph and its components and who process qualifications corresponding to their activity, e.g.:

    n Trained and authorized to activate/deactivate, ground and tag circuits and devices/systems according

    to safety standards, in particular in potentially explosive atmospheres

    n Trained according to safety standards with respect to the care and use of appropriate sa fety equip -ment

    n Trained in first aid.

    Sa fe ty instructions

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    WARNING: dangerous gases!

    The chromatograph operates with various gases which may be more or less dangerous.

    Before carrying out work on the chromatograph, always determine which gases the chroma-

    tograph is operating with, in particular the composition of the sample gas.

    Pass all exhaust gases from the chromatograph into a common line and route away from the

    installation location.

    Always make sure that there is sufficient ventilation

    n if you are working with hydrogen since this forms an explosive mixture with airn if you are working with liquid CO2. Breathing in of larger quantities of CO2 results in an

    oxygen deficiency even up to unconsciousness or death through suffocation.n if you permit the sample gas line to run empty, and the sample gas contains corrosive or

    toxic components.

    The analysis of mixtures containing CS2 is not permitted.

    WARNING: danger of explosion!

    The chromatograph may require gases for operation which form an explosive mixture with

    air!

    Before carrying out work on the chromatograph, always determine which gases the chroma-

    tograph is operating with.

    Pass all exhaust gases from the chromatograph into a common line and route away from the

    installation location.

    Always make sure that there is sufficient ventilation.

    WARNING: danger of explosion!

    The chromatograph is intended for the analysis of gaseous flammable and non-flammable

    media. Hydrogen or inert gases are used as carrier gases. In the analysis of flammable me-

    dia or when using hydrogen as the carrier gas, only traces of oxygen occur in the sample; inother cases, the oxygen content of the sample is limited to the concentration that normally

    occurs in inhaled air.

    The analysis of mixtures of flammable gases and other gases at a pressure of > 1.1 bar isnot permissible for explosive mixtures.

    Flammable gases that are explosive under the conditions relevant to the analysis, even with

    the exclusion of oxygen, may only be contained in the mixture for analysis in concentrationsthat are not critical for safety.

    CAUTION: danger of corrosion!

    The housing is extremely resistant to solvents, weak alkalis and acids. When used in envi -

    ronments with strong alkalis and acids at increased temperatures, the resistance should be

    tested in individual cases.

    Safe ty instructions

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    Electrostatically sensitive device!

    Before touching such components or modules:

    n Switch the chromatograph off.n Discharge all static from yourself by touching a grounded object or by wearing an ESD

    wrist band.n

    Only use tools which are free of static charges.n Do not touch any pins or printed conductors. Only hold modules on their edges.

    Exclusion from liability for external accessories

    If you use or wish to connect accessories to your chromatograph which we have not expressly recom-mended, please ask us to first confirm that the operational safety of the chromatograph will not be influ-

    enced by these external accessories. Without this confirmation we will accept no liability for the opera-

    tional safety.

    Symbols and abbreviation use in this manual

    Designation SymbolAbbreviati-

    onRemarks

    Pressure regulatorDR

    Pressure transducerDW

    ManometerMA

    Pressure reducerDB With or without class data

    Needle valveNV With Teflon or graphite gasket

    Restrictor capillary DS

    Solenoid valveMV Closed when de-ener gi zed

    Solenoid valveMV Open when de-ener gized

    Absorber

    Preliminary column

    Main column

    VS

    HS

    Thermal conductivity detectorFlame ionization detector

    TCDFID

    Liquid injection valve

    Gas injection valve

    FDV

    GDV

    Sa fe ty instructions

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    Explosion protection

    The installation and operation of electrical equipment in potentially explosive atmospheres is re-

    gulated by the guideline RL 99/92/EU (ATEX 137). Reference is made in this guideline to general

    technical regulations.

    WARNING:

    The test certificate for your explosion-proof chromatograph only applies to the original confi-

    guration with connection and installation according to the Siemens circuit and piping dia -

    grams. The explosion protection for your device is cancelled if one or more components are

    modified.

    Conditions

    The test certificate together with any supplements includes all conditions specified for installation and

    operation of the chromatograph.

    Identification for explosion protection

    The chromatograph is flameproof, i.e. the housing is resistant to an internal explosion pressure. The

    housing of your MicroSAM has a rating plate on which the identification for explosion protection is spe-

    cified: II 2 G EEx d IIC T4

    Switching on the chromatograph

    The power supply to the chromatograph must only be switched on if it has been correctly connected!

    Opening the housing with the power supply switched off

    Before opening the housing in the potentially explosive atmosphere, the power supply must be switched

    off and an essential waiting time of 60 minutes subsequently observed.

    WARNING:

    As a result of hot components and residual electric charges in the chromatograph, explo-

    sions may occur if the housing is opened too soon. A corresponding reference to this is pre-

    sent on the chromatograph!

    Opening the housing with the power supply switched on

    A diagnostics plug is located behind the status display panel. The housing must be opened in order toaccess this. In the potentially explosive atmosphere, this is only permissible with a fire permission certi-ficate.

    WARNING:

    Opening the housing in the potentially explosive atmosphere with the power supply switched

    on is only permissible with a fire permission certificate.

    Explosion protection

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    Maintenance on parts upon which the explosion protection depends

    WARNING:

    The regulations of guideline RL 99/92/EU (ATEX 137) must be observed when carrying outmaintenance and repairs!

    Explosion protection

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    Installation

    Location requirements

    It is essential to observe the following information underTechnical data.

    n Permissible ambient temperaturen

    Permissible relative humidityn Power supply, power consumptionn Lightning protectionn Gas connections, gas purity

    Space requirements

    n Distance from the wall or next chromatograph, on both sides: 300 mmn Distance from the ceiling and floor: at least 200 mm

    The MicroSAM can be mounted in different manners. The four M10 threaded holes at the rear are al-ways used.

    n Mounting on a wall/mounting platen Mounting on a pole using and an additional sup port

    CAUTION

    MicroSAM has to be mounted horizontally with the analytical module on top. You can identify

    the correct position looking to the inspection window: You should be able to read the words

    without standing on your head.

    Installa tion

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    Dimensional drawing

    Installation

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    4 x M10 x 25

    L = 4000 mm L = 400 mm

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    Mounting

    The following mounting operations are always necessary:

    n Gas lines, sample lines, exhaust linesn Power supply switch, mains fuse, mains cablen Equipotential bonding cablen Communication cable

    CAUTION

    Leave the dummy plugs on the gas inlets until you wish to start the chromatograph. The

    commissioning engineer should only connect the gas lines to the chromatograph when they

    have been checked!

    WARNINGDo not use a different carrier gas, than specified in the application documentation!

    The thermal conductivity detectors may be damaged otherwise.

    Gas linesn Material: copper or stainless steel 6 mm x 1 mm (1/4"). Only use extremely clean gas lines. Clean

    them if necessary prior to assembly.n Route the gas lines up to the chromatograph according to the piping diagram. Connect a shut-off val-

    ve in each line upstream of the chromatograph.

    Cleaning the pipes

    n Flush using a volatile solvent (acetone, hexane, but not chlorinated hydrocarbons!)n Then heat the pipes while flushing with protective gas, e.g. five minutes at 200 C. Purity of protecti-

    ve gas 99.999 %.

    Gas connections on the chromatograph

    n All gas inlets and outlets, pipe 1.5 x 0.25 mmn All gas inlets and outlets have a label with a numbern The gas connections for sample and carrier gas are equipped with 3mm adaptors. These adaptors

    are containing a filter each and must not be removed.

    Number Function Remarks

    1 Analyzer vent Heated

    2 Analyzer vent Heated

    3 Sample Heated

    4 Sample Heated

    5 Car rier gas inlet Not heated

    6 Outlet from pneumatic plug Not heated

    7 Outlets for control air from solenoid valves Not heated

    8 Spare Not heated

    Installa tion

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    IMPORTANT:

    All chromatograph-specific connection diagrams can be found in the manual in the RegisterExternal piping and wiring diagrams.

    CAUTION:

    The 3mm adaptors at the gas connections 3, 4 and 5 are containing a filter each.They must not be removed.

    Sample linesn The sample conditioning must be fitted close to the chromatograph so that the connection lines are

    short.n The sample line to the chromatograph should have a downward gradient.

    IMPORTANT:

    The injector valves have a shorter life if the sample contains solid components! A filter is re -

    quired upstream of the injector in this case. We recommend filters with a separating ca pacity:

    n Liquid sample: 98% for 0.3 m particlesn Gaseous sample: 99.99% for 0.1 m particles.

    Siemens sample conditioning units contain such filters.

    Exhaust lines

    All exhaust gases from the chromatograph must be routed into a common line. The individual exhaust

    lines must have a downward gradient to the common line. Their diameter must not be reduced.

    Material of common exhaust line

    Stainless steel pipe with an internal diameter of at least 12 mm (1/2") with welded couplings and scre-

    wed glands. Minimum downward gradient 1 : 10.

    Breathing device

    If the MicroSAM housing is purged with air or inert gas, a piping can be connected here. This piping

    must be designed in such a way that atmospheric pressure conditions are present in the piping system.

    WARNING: Breathing device

    The breathing device may not be locked!

    Power switch and fuse

    The chromatograph does not have a power switch. A power switch and fuse with a rating of 2.5 A at

    min. 24 V must be fitted in the building installation. The power switch should be installed close to the

    chromatograph.

    Connecting the power supply cable

    The chromatograph is delivered with a 4-m long cable. The cable diameter is 18 mm.

    Installation

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    All conductors must be connected since a single conductor is insufficient for the maximum current! Thecable must be fixed and terminate in a box with recognized protection type.

    Suitable cable gland: M32 with a diameter range from 13 to 21 mm.

    Conductor color Function

    White + 24 V DC

    Brown + 24 V DCGreen + 24 V DC

    Yellow + 24 V DC

    Gray GND 24 V DC

    Pink GND 24 V DC

    blue GND 24 V DC

    red GND 24 V DC

    black (r)

    Permissible cable length

    The power at the MicroSAM must be 24 VDC +10% - 15%. If the power sup ply provides exactly 24 V

    and only one MicroSAM is connected, the cable length is depending from the conductor cross-sectionas follows (2 x Distance = Cable length):

    Conductor cross-section Distance

    1,5 mm2

    40 m

    2,5 mm2

    70 m

    4,0 mm2 110 m

    6,0 mm2

    170 m

    10,0 mm2

    280 m

    16,0 mm2

    450 m

    Equipotential bonding cable / earthingAn equipotential bonding cable is required for explosion-proof chromatographs depending on the local

    installation regulations. Independent of this, the housing of the MicroSAM must be earthed for electro -

    magnetic compatibility reasons.

    Connect the earthing screw (symbol r) at the back right on the chromatograph to a central earthing

    point. Cable cross-section 2.5 to 6 mm2. The contact washer must always be present between the cable

    lug and the housing. Sequence: housing, contact washer, cable lug, plain washer, M6 screw.

    Lightning protection

    In areas where storms occur, we recommend appropriate lightning protection equipment to protect per-

    sonnel and equipment. The following are required for comprehensive protection:

    n Lightning conductorn Earthed metal band in building to protect against static charges. This is especially important at grea-

    ter heights and with dry air.n Transient suppressor in all lines leading to the chromatograph. These are available e.g. from Phoenix

    Contact.

    Installa tion

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    Assembly of communication cable

    Conductor color Function Remarks

    Violet RS232 RxD / RS485 B+

    Black RS232 TxD / RS485 A-

    Gray/pink RS232 / RS485 shield

    Red/blue RS232 / RS465 GNDBrown/green Ethernet 10BaseT TX+ Ether net ca ble oran ge/whi te

    White/green Ethernet 10BaseT TX- Ether net ca ble oran ge

    White/yellow Ethernet 10BaseT RX+ Ether net ca ble green/whi te

    Yellow/brown Ethernet 10BaseT RX- Ether net ca ble green

    Cable type

    We recommend twisted pair cables, 0.14 mm2, shielded, AWG 26.

    Conversion of serial interface to RS232 or RS485

    MicroSAM has only one serial interface which can be switched between RS232 and RS485. It is neces-

    sary to assign com1 to RS232 and com2 to RS485 in the System Manager, as described in the SystemManager instructions.

    Terminating resistors for MODBUS with RS485

    RS485 cables must be terminated at both ends with 120- resistors in order to prevent reflections. This

    resistor is present in the MicroSAM. It can be switched on using the software. This is usu ally carried out

    in the MicroSAM which is furthest away.

    CAUTION: explosion protection

    All conductors must be connected in the junction box. This means that cables must not have

    more conductors than are actually required.

    Always refer to the connection diagram.

    Connecting the digital inputs and outputs

    Conductor color Function Remarks

    White/gray Digital output 1+

    Relay contact

    0.5 A / 100 V / 10 W

    Gray/brown Digital output 1-

    White/red Digital output 2+

    Brown/red Digital output 2-

    Brown/blue Digital input 1+

    24 V to opto isolatorWhite/blue Digital input 1-

    White/pink Digital input 2+

    Pink/brown Digital input 2-

    Suppression diodes for solenoid loads

    If you connect e.g. solenoid valves to the digital outputs you need suppression diodes.

    Cable type

    We recommend twisted pair cables, 0.14 mm2, shielded, AWG 26.

    Installation

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    Connection of control unit

    Connect the Ethernet connection of the operator PC to the corresponding conductors of the chromato-graph (see Table Communication cables).

    WARNING: explosion protection

    You require a fire permission certificate to transport a laptop through the Ex zone and if youwish to open a chromatograph in zone 1.

    Local connection of control unit

    Loosen the 1.5 mm hexagon socket screw on the retaining ring of the inspection window. Unscrew the

    ring. If it cannot be opened by hand, you can increase the lever arm e.g. by inserting two matchingscrewdrivers into the holes at the edge of the ring (yellow arrow in picture Following local operation).

    Lever out the insert from the chromatograph as shown below.

    A 25-contact Sub-D socket is then visible. Connect the Ethernet connection of the operator PC to the

    corresponding pins of the chromatograph according to the table. If the display board is removed, theEthernet connection via the standard cable is interrupted.

    Pin No. Meaning Remarks

    22 Ether net 10BaseT TX+ Ether net cable orange/white

    23 Ether net 10BaseT TX- Ether net cable orange24 Ether net 10BaseT RX+ Ether net cable green/whi te

    25 Ether net 10BaseT RX- Ether net cable green

    WARNING: explosion protection

    You require a fire permission certificate if you wish to open a chromatograph in zone 1.

    Installa tion

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    Following local operation

    n Screw in the securing ring carefully as far as possiblen Rotate the 1.5 mm hexagon socket screw clockwise in the securing ring (top red arrow) as far as

    possible.

    WARNING

    The explosion protection regulations specify that the cover of the MicroSAM must only be

    opened using a tool. This is guaranteed by the hexagon socket screw.

    Networks

    There are so many possibilities for generating networks that we cannot provide any generally applicable

    regulations here. You can find more details on networking possibilities in the Section Software and

    networking.

    Installation

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    Technical data

    Climatic conditions

    Permissible ambient tem pe ra tu re - 20 to 55 C

    Permissible sto ra ge/trans port tem pe ra tu re - 30 C to 70 C

    Permissible relative hu mi di ty Max. 90 %

    Protection against dust and moisture

    according to EN 60529 / IEC 60529

    according to NEMA 250

    IP 65

    NEMA 4

    Power supply

    Power supply 24 VDC +10% -15%

    Fuse T2.5 A

    Power consumption, typical 18 VA

    Power consumption, max. 60 VA

    Dimensions and weights

    Width x depth x height 360 x 300 x 220 mm (approx. 14" x 12" x 9")

    Weight 15 kg (35 lb.)

    Installation

    Installation on Pole, pipe or wall

    Dis tan ce from wall or next chro ma to graph 300 mm (12")

    Dis tan ce from cei ling or floor 200 mm (8")

    Electromagnetic compatibility

    Radio interference suppression According to CISPR 11 / EN 55011 / DIN VDE 0875

    Limit class B

    EMC According to IEC 60801 / DIN VDE 0843

    Conducted interferences

    on AC power supply lines- According to Part 4 (burst)

    - According to Part 5 (s pulses), bet ween con duc tors

    - According to Part 5 (ms pulses), between conductor and earth

    Conducted interferences on signal li nes

    - According to Part 4 (burst)

    Interference immunity to disch ar ges of static electricity

    - According to Part 2 (ESD)

    Interference immunity to fields

    - According to Part 3 and Part 6

    2 kV

    1 kV

    2 kV

    1 kV

    8 kV

    10 V/m

    Safety

    Elec tri cal sa fe ty IEC 61010 / DIN VDE 0411

    Explosion protection CENELEC II 2 G Ex d IIC T4

    Certificate DMT 03 ATEX 069 X

    NEC / CSA available soon

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    Oven

    Number / type 1 / isothermal

    Purging with N 2 Possible

    Dimensions (WxH) 160 x 10 mm

    Max. heat output 35 VA

    Tem pe ra tu re ran ge 60 to 165 C

    Tem pe ra tu re sta bi li ty 0.1 K (60 to 165 C)

    Tem pe ra tu re ac cu ra cy 3 K (60 to 165 C)

    Retention time variations

    per 10 C change in ambient temperature Approx. 0.3%

    Heating-up time from 30 to 100 C 10 minutes

    Columns and gases

    Column type Capillary columns 0.15 to 0.25 mm internal diameter

    Column switching Multi-dimensional chromatography

    with backflushing and live cut

    Multi-function diaphragm valve For dosing and backflushingGas connections Pipe 1.5 x 0.25 (approx. 1/16")

    Pressure regulator Max. 4 single-channel electronic pressure regulators

    Solenoid valves for control of diaphragm val ve 2 NC contacts, 2 NO contacts

    Carrier gas H2, N2, He, Ar

    - Gas pu ri ty (mi ni mum re qui re ment) 99.999 % (5.0)

    - Par ti cu la tes < 0.1m

    - Required fil tra ti on Separation 99.99% for 0.1 m particles

    - Consumption 10 to 60 ml/min

    - I nput pressure 500 to 700 kPa

    Instrument air Not required

    Sample and injection

    Sample lines 1

    Calibration lines Max. 2

    Phase Gaseous

    Permissible sample pres su re 10 to 50 kPa

    Sample flow 20 to 100 ml/min

    Max. sample temperature 120 C

    Particulates < 0.1m

    Required filtration Separation 99.99% for 0.1 m particles

    Materials wetted by the sam ple Stainless steel, fused silica, polyimide

    Injection "Valveless" live injection

    - Control With multi-function diaphragm valve

    - I njection volume adjustable using switching times From 2 to 50 l

    - Max. operating temperature 165 C

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    Detectors, calibration and performance data

    Detector type TCD, max. 8 sensors

    Cell volume 0.02 l

    Calibration Manual or automatic, single-level or multi-level

    Repeatability for measuring ranges > 300 ppm

    Repeatability for measuring ranges 300 ppm

    1% of full-scale value

    2% of full-scale value

    Detection limit for measuring ranges > 300 ppm 1% of full-scale value

    Smallest measuring ran ge 300 ppm

    Linear range 104

    Cycle time Typically 30 to 120 s

    In flu en ce of ambient tem pe ra tu re Neglig ible

    In flu en ce of vi brat ions Negligible

    Mean time to repair / MTBF < 1 hour / 3 years (without consumable materials)

    Electronics: communication and analytical controller (CAC)

    Microprocessor Intel 586 architecture

    Flash-EPROM 16 MB

    Dy na mic RAM 64 MB

    Operating system Windows CE 3.0

    Software Downloaded from operator PC via network or locally

    Electronics: real-time signal processor (RSP)

    Microprocessor Motorola 68376, 20 MHz

    Flash-EPROM 1 MB

    Static RAM 1 MB

    Operating system Forth

    Software Downloaded via internal service interface

    Interfaces

    Communication 1 x Ethernet 10BaseT / TCP/IP

    Interfacing to control system 1 x RS 485 or RS 232 / MODBUS RTU

    Inputs/outputs: basic configuration

    Digital outputs (relay contact 0.4 A / 24 VDC) 2, for free use (*1)

    Digital inputs (24 V to opto isolator) 2, for free use (*1)

    *1) Ex pan da ble with NAU

    Controller

    Sample lines 1

    Calibration lines Max. 2

    Status LEDs for Power supplySoftware heartbeat

    Ready

    Maintenance requestFault

    Sample flow

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    Recommended control unit

    Personal computer Desktop or laptop

    Processor Pentium III or better

    Clock 600 MHz

    Interfaces 1 x Ethernet

    Operating system Windows 98, NT, 2000 or XP

    Software Advance System Tools, Version 4.0 or later

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    4 x M10 x 25

    L = 4000 mm L = 400 mm

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    Startup

    CAUTION

    To prevent damage to the chromatograph, carry out all work in the sequence listed in the se

    instructions.

    Connecting the gasesn Check that all gas lines correspond to the piping diagram and that all gases and gas lines are cleann Thoroughly purge the gas lines againn Remove the dummy plugs from the gas inlets and outletsn Connect the gas lines according to the piping diagramn Connect the exhaust lines according to the piping diagram

    Adjusting the gases

    Open up the carrier gas valve.

    WARNING: danger of explosion

    Observe the explosion protection regulations if you are starting up an explosion-proof chro-

    matograph!

    Switching on the chromatograph

    Switch on the power supply. The MicroSAM does not have a power switch. We recommend an external

    power switch.

    WARNING: danger of explosion

    If flammable gases are supplied at a pressure of > 1.1 bar, the chromatograph and the gas

    inlet pipe must be purged with carrier gas before switching on the chromatograph.

    If atmosphere can infiltrate the pipe system as a result of repair or maintenance, the chro ma-

    tograph must be switched off before starting the maintenance. After completion of the work,

    the gas supply pipe must be purged with carrier gas before the chromatograph is switchedon again.

    Testing the system for leaks

    Using an appropriate flowmeter, check that no gas is released from line 6. Refer to Gas connections on

    the chromatograph . If gas is released, there is a leak in the pneumatic connector.

    Connecting the sample pressure

    Please observe the information on Filters and Permissible sample pressure.

    Starting the PC and control software

    The System Manager must be started and the connection to the chromatograph made so that data can

    be recorded on the PC. Refer to Establishment of communication.

    Startup

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    Additionally for maintenance and first startup

    WARNING: danger of explosion

    You require a fire permission certificate to transport a laptop through the Ex zone and if you

    wish to open a chromatograph in zone 1.

    It is essential that you refer to the information in the registerExplosion protection.

    Connecting local PC to chromatograph

    Connect the local PC to the chromatograph as described in the registerInstallation: Local connection of

    control unit, and start the control software as described in the registerOperation.

    Starting cyclic operation

    if the application is correct, switch the chromatograph to cyclic operation as described in the register

    Operation.

    Disconnecting local PC from chromatograph

    Disconnect the local PC from the chromatograph as described in the registerInstallation : Localconnection of control unit.

    ShutdownThe separating system and detector are contaminated least if the chromatograph is in operation. There-

    fore do not switch off the chromatograph if the system is not used for a short period (up to 3 weeks).

    Only switch off the output devices.

    If you nevertheless switch off the chromatograph, we recommend the following sequence:

    n Turn off all sample lines. Vent the lines if necessary, and flush them dry.n Switch the power supply off.n Allow the chromatograph to cool down. Up to half an hour may be required depending on the oven

    temperature.n Switch off the carrier gas.

    Startup

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    Operation

    MicroSAM can be operated via Ethernet and a PC, or via the built-in control panel (MMI) of a MAXUMchromatograph, or via a network access unit (NAU).

    Various stages of operation

    Operation on the PC comprises three stages:

    n System Manager - network monitoring and configuration of the chromatographn EZChrom - development of method and control of analysisn MMI emulation - operation and monitoring

    System Manager configure database and applications

    Provides the connection to the chromatograph, and an overview of the network.

    Serves for configuration and high-level monitoring of the chromatograph. Also branches to the MMI

    emulation, EZChrom and the basic editor.

    The System Manager outputs almost exclusively static displays, i.e. it fetches a table from the chroma -

    tograph's database, and saves it again later. Only results and alarms are displayed in dy namic mode.

    The System Manager displays the hardware in tables, i.e. the system table includes all hardware com-

    ponents of the chromatograph: detectors, valves, ovens, digital outputs etc.

    EZChrom generate methods and sample sequences

    Methods and sample sequence lists of an application can be generated and modified using EZChrom,

    e.g. optimize evaluation parameters, modify time programs, display chromatograms and results, re-inte-gration.

    Access to the chromatograph's database is exclusively static.

    MMI emulation operation and monitoring

    This is identical to operation on the built-in control panel of a MAXUM or an NAU. It is used for operati-

    on and monitoring, e.g. view results, switch valves, modify temperatures. However, there are only mini-mum facilities for editing configurations and tables.

    MMI is always a dynamic display.

    Where and how the data are organized

    One must be acquainted with the following terms when using the chromatograph: database, application,

    methods, sample sequences.

    The database

    All parameters of a chromatograph are saved in a database. This contains configuration data and appli-

    cations of the System Manager, EZChrom methods, sample sequences, archive and alarm log. This da -

    tabase can be viewed in static or dynamic mode.

    Staticcorresponds to a snapshot of the database, i.e. tables are imported from the database into the

    PC, edited, and subsequently exported to the chromatograph again. The display is not automatically up-

    dated. The data must be imported again in order to view modifications.

    Dynamic means that the values are updated as soon as they change. Most of the MMI displays are dy-

    namic. With the System Manager, only the results and alarms. EZChrom is always static.

    In the System Manager, copies of the database can be saved on the hard disk, and saved da tabases

    loaded into the chromatograph (file extension.AMD).

    Application

    Applications share the chromatograph hardware. Parts of the system table are assigned to each appli-

    cation. These quasi generate a virtual chromatograph. Each application has sample flows, one or more

    sample sequence lists, inputs/outputs, several EZChrom methods, basic programs, chromatograms,

    temperature controllers, pressure regulators, results.

    Operation

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    Each chromatograph can have several applications.

    Methods

    A method contains information required to analyze a sample stream: configuration data of detectors,valves etc., peak detection parameters and evaluation parameters, time programs. Methods are genera-

    ted using EZChrom and exported to the chromatograph's database.

    Sample sequences

    These are lists of sample streams and assigned methods. Each application has at least one normal se-

    quence and one calibration sequence. Although an application can have several sequences, only one is

    active at a time.

    How the data originaten When the chromatograph is switched on for the first time, it automatically generates the required en -

    tries in the system table by Plug&Play. However, the chromatograph only recognizes, for example,

    that it has an electronic temperature controller, but does not know which type of oven is to be con -trolled using it.

    n In the second step, all hardware of your chromatograph is completely written in the factory by a confi-

    guration program. The existing hardware is then assigned to one or more applications. The configura-tion program generates a text file which is imported into the chromatograph by the System Manager.

    n The applicable data are subsequently determined, and entered using EZChrom: valve switching, eva-luation parameters etc. These data are saved as methods and a sample sequence list using EZ-

    Chrom.n All data are finally exported together from the chromatograph's database as an AMD file using the

    System Manager, saved with the remaining documentation on a CD, and supplied with the chromato-graph.

    Monitoring the chromatograph's function

    MicroSAM is completely parameterized when you switch it on (if you didn't order a basic unit and an an-

    alytical module separately). It need only be integrated into the communication network, and calibrated of

    course. It is subsequently only necessary to monitor correct functioning at regular intervals.

    The LEDs

    The LEDs behind the inspection window of your MicroSAM provide a initial impression of the status of

    your MicroSAM. They have the following meanings:

    Operation

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    Health status

    24 V DC

    Heart beat

    Ready

    Maintenance request

    Failure

    Sample flow

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    LED Meaning when LED lights up

    Power supply 24 V po wer supp ly pre sent

    Heart beat Software sign-of-life

    Ready MicroSAM is ready

    Maintenance request MicroSAM has a maintenance request

    Failure MicroSAM has an alarm

    Sample flow Sample is flowingHealth status (left) Ether net link is present

    Health status (right) Communication is taking pla ce

    Establishment of communication

    The IP address is factory-set in the MicroSAM to 192.168.144.0xx. "xx" corresponds to the last two di -

    gits of the serial number on the rating plate. For example, the IP address is 192.168.144.047 if the seri-

    al number of the MicroSAM is HX R5 347. The Subnet mask is always 255.255.255.0.

    To permit your PC to communicate with the MicroSAM, its IP address must be in the same "world". This

    means that its IP address must be manually set to 192.168.144.0 to 255, but of course must not be

    identical to the IP address of the MicroSAM. We recommend that you set 192.168.144.254, and

    255.255.255.0 as the Subnet mask.Once the System Manager has started, the new chromatograph must be entered using the functionAdd

    Unit. More detailed information on the subject of Ethernet networking can be found in the description of

    the System Manager.

    Alarms

    Open the associated chromatograph in the System Manager, and click on Alarm Log. All alarms are dis -

    played here. These alarms can be deleted so that it is possible to check whether they occur again.

    Checking the chromatogram

    EZChrom can be used to compare the current chromatogram with previous chromatograms. This per -mits conclusions to be made concerning changes in the analytical system.

    Checking the results

    EZChrom can be used to check whether the results are complete and realistic.

    IMPORTANT

    The number of time events in EZChrom for MicroSAM must not exceed eight at the sameexecution time (Retention windows, valve switching etc.). Otherwise you will get an error

    message later while executing the time events.

    If you need more than eight time events at the same execution time, you must use slightly

    different execution times for groups of eight time events each.

    Operation

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    Maintenance of the analysis module

    We use standardized analysis modules with MicroSAM. They are very powerful and thus are suit ablefor many different applications.

    The most important feature is the in-line detection. The columns and the thermal conductivity detectors

    (TCD) are connected in series. So MicroSAM can collect the results from the locations, where the com -

    ponent separation is optimum.The TCDs are semi bridges w/o reference. Two TCDs are connencted in each case to a completebridge circuit in a way, that no overlapping of signals will occur.

    Internal tubing diagram

    Analysis modules

    All analysis modules are containing a Live injection and a Live column switching. The anal ysis modules

    A01 to A03 have two detectors more and one column more than the analysis moduules A04 to A08.

    The analysis modules are suitable for the following components:

    A01

    Injection TCD Sil5 TCD PoraPLOT/Porabond Q TCD Live Molecular sieve TCD

    C3, C4, C5, C6+ CO2, C2, H2S, H2O H2, (Ar+O2), N2, C1, CO

    A02

    Injection TCD Sil5 TCD SilicaPLOT TCD Live Molecular sieve TCD

    C5+ C2, C3, C4 (saturated,

    unsaturated), C5+

    H2, (Ar+O2), N2, C1, CO

    A03

    Injection TCD Sil5 TCD Wax TCD Live ALOX TCD

    C5+ polar volatile components

    like alcoholes, ethers,

    ketones, aldehydes. C7+

    C1, C2, C3, C4

    (saturated, unsaturated)

    A04

    Maintenance of the analysis module

    30 SAM-Manual_E.vp, Issue 06.05.2004

    Column 3

    Pressurecontroller 3

    Live

    switching

    Sample in

    Membranevalve

    Carrier gas

    Pressurecontroller 1

    Pressurecontroller 2

    Backflush

    Live

    Injection

    Sample outSample in

    TCD TCD

    TCD

    TCD

    A01 ... A03

    Column 1b

    TCD TCD

    Column 1a

    A04 ... A08

    Column 1a Column 1b Column 2

    TCD TCD TCD TCD

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    Injection TCD Wax TCD Live SilicaPLOT TCD

    polar volatile componentslike alcoholes, ethers, ke -

    tones, aldehydes. C7+

    C1, C2, C3, C4, C5, C6(saturated, unsaturated)

    A05

    Injection TCD Wax TCD Live Wax TCD

    polar aromatic andaliphatic hydrocarbons

    polar ar o matic andaliphatic hy dro car bons

    A06

    Injection TCD Sil5 TCD Live Sil5 TCD

    non-po lar ar o matic and

    aliphatic hydrocarbons

    non-po lar ar o matic and

    aliphatic hy dro car bons

    A07

    Injection TCD Wax TCD Live Sil5 TCD

    polar aromatic andaliphatic hydrocarbons

    non-po lar ar o matic andaliphatic hy dro car bons

    A08

    Injection TCD Porabond Q TCD Live Molecular sieve TCD

    all components except

    Molsieve components

    H2, (Ar+O2), N2, C1, CO

    Removing the analysis module

    WARNING

    Observe the regulations for explosion protection if the MicroSAM is installed in a potentially

    explosive atmosphere.

    When using the chromatograph in explosion hazardeous areas, a waiting time of 60 min.must be observed before opening the housing. After this time, the surface temperatures in-

    side the chromatograph have cooled to < 135C and the electrical charge of internal compo-

    nents will have reduced to an uncritical level.

    n Loosen the hexagon socket screw (1.5 mm) in the top cover of the MicroSAM by two rotations.n Unscrew the top cover. If the cover cannot be opened by hand, you can increase the lever arm e.g.

    by inserting two matching screwdrivers into the holes at the edge of the cover.n Remove the insulation.

    Maintenance of the analysis modu le

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    n Loosen the large nut using a 21 mm open-ended spanner until it is flush as shown below on the

    right.

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    n Loosen the small nut using a 10 mm open-ended spanner, and completely unscrew the securingnut.

    n Rotate the screw using the extraction tool as far as shown below.

    Maintenance of the analysis modu le

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    n Insert the dovetail of the extraction tool behind the hexagon screw head on the analyzer module,and fix it by rotating clockwise.

    n Hold the bottom part of the extraction tool, and rotate the screw clockwise until the ana lyzer mo -

    dule falls out.

    n Remove the analyzer module from the guide pin.

    Fitting the analyzer modulen Slide the new analyzer module onto the guide pin such that the three electrical plugs underneath fit

    into the corresponding sockets.

    Maintenance of the analysis module

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    CAUTION

    The type of the new analyzer module must be identical to the old module.This type identification is printed on the white label on the analyzer module.

    Example: 05-126. The first two digits (05 in this case) correspond to the module type.

    n Press the analyzer module tight by hand.n Adjust the securing nut until it is flush as shown below on the right.

    n Screw the securing nut by hand onto the guide pin, making sure that the adjustment is retained.n Carefully tighten the securing nut using the specially supplied 10 mm wrench.n Rotate the large nut in the clockwise direction using the specially supplied 21 mm wrench until ap-

    prox. 1.5 mm of the thread is visible, as shown above on the left.

    CAUTION

    The glands of the analyzer module are sealed in the process by the pneumatic plug. Only

    use the specially supplied wrench. The connection will be damaged if you exert too much

    force by using a longer lever arm.

    n Insert the in su la ti onn Carefully screw on the cover as far as pos si blen Rotate the 1.5 mm hexagon socket screw in the cover (bottom red arrow) clockwise as far as possi-

    ble.

    Maintenance of the analysis modu le

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    WARNING

    The explosion protection regulations specify that the covers of the MicroSAM housing areprotected against unintentional opening by a locking screw.

    These screws must be loosened before opening.

    After locking, these locking screws must be tightened.

    n It is still necessary to load the analyzer parameters after switching on the MicroSAM again. To do

    this, import the supplied text file into the MicroSAM as described in the documentation of the System

    Manager.

    Adjusting mechanical zero of the pressure regulators

    If the pressure regulation is under suspicion to cause faulty analytical results, e.g. shifted retention

    times, the function of the pressure regulators should be checked, and the mechanical zero should be

    adjusted if necessary

    WARNING

    This service procedure may only be carried out by trained experts.

    Danger of causing short circuits at the electronical boards.

    For adjusting the mechanical zero the appropriate special tool has to be used.

    On MMI in Maintenance Mode select the menu App I/O, Temperature & Pressure and in this menu theitem Pressure Controller. In the column PWMyou see the controller output signals for the four pressure

    regulators. The controller output should read 10 to 30 %. If this value reads 0 or 100 %, the mechanical

    zero should be adjusted.

    Using the MMI, adjust the set value for the pressure according to the application documentation. Thenuse the special tool to adjust the pressure regulator until the PWM value reads approximately 20 %.

    The photo shows the position of the pressure regulators. On the lower left you will find reg ulator 1 (yel -

    low arrow), the numbers increase counterclockwise. While adjusting, off course, the electronic boards

    are in place. You have to find the pressure regulators by "feeling" with the special tool.

    Maintenance of the analysis module

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    If PWM was 0, turn left, the PWM value should increase. If PWM was 100, turn right, the PWM valueshould decrease. Adjust half rotation at maximum. If this is not sufficiet, ship the MicroSAM back to

    Siemens for service.

    Maintenance of the analysis modu le

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    The Live injection

    The injection volume of the Live injection system can be adjusted by time events for the in jection valve.Thus a small well defined amount of sample is cut out of a big sample flow.

    Filling the injection loop

    The injection loop is beeing filled with sample.

    Purging the injection loop

    The injection loop is purged via the Live injection piece to the backflush vent.

    Injection

    A small part of the injection loop's volume is purged into the column. This injection volume can be

    defined by modifying the pulse width for the injection valve.

    The Live injection

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    Carrier gas

    Backflush

    Sample in / out

    Carrier gas

    Backflush

    Sample in / out

    Carrier gas

    Backflush

    Sample in / out

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    Backflush

    The columns are purged backwards to the backflush vent.

    The Live injection

    SAM-Manual_E.vp, Issue 06.05.2004 39

    Carrier gas

    Backflush

    Sample in / out

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    The Live column switching

    Two columns are connected in series by the Live T-piece. The columns have e.g. different sepa-

    rating characteristic. The various operating states of the live switching circuit are activated by

    pressure changes in the gas supply lines of the Live T-piece: Straight, Backf lush, Cut. The elec-

    tronic pressure regulators are controlled by time events.

    Straight

    The components pass through two columns in suc-

    cession.

    Backflush

    Once a number of components have passed

    through the first column, the flow direction in this

    column is reversed. The components which are

    still present in the first column are collected againat the beginning of this column and flushed out

    into the open air via the backflush outlet.

    This permits the analysis cycle to be drastically shortened: higher boiling components which only pass

    through the first column slowly need not be removed at a higher temperature, a process which often re-

    quires a long time.

    Cut

    Once a number of components have passed

    through the first column, they are flushed out

    through the cut outlet. They never reach the sec -ond column.

    This method is used:

    n to keep components away from the second column which cannot be backflushed because they are

    followed by components which are still of interestn if components falsify the result or damage the second columnn to directly pass components onto a further detector, e.g. in order to shorten the duration of the analy-

    sisn to divide components further on a third column (distribution).

    Advantages of live switchingn The sample only comes into contact with metal parts in the live T-piece, but with no valves.n There are no temperature limitations because the switching valves are mounted outside the oven.n Maintenance-free since there are no moving parts.n Minimum dead volume, highly suitable for capillary columns.

    The Live column switching

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    How Live switching functions

    Pressures and flows are important

    Two columns are connected in series, and a pres-

    sure of P1 is connected to the beginning. Atmo-

    spheric pressure is present at the end. The pres -

    sure distribution and flows are then as shown onthe left.

    Conclusion:

    In the straight operating mode shown here, the

    pressure P2 is present in the middle between the

    two columns.

    NOTE:

    In reality, the pressure drops are not linear, they are

    curved.

    Time for reflection

    The pressure P2 read on the Y-axis in the above

    figure is now applied between the two columns.

    The input of the first column is left open. This re -

    sults in a pressure distribution and flows as shown

    on the left.

    Conclusion:

    Backflushing is now being carried out in the first

    column.

    What we don't know yet ...

    If we wish to prevent a specific peak from disappearing into the second column once it has passedthrough the first column, we need an outlet betwwen the columns (cut outlet). And we need a connec-tion for he pressure P2 from the reflection above. The solution is the live T-piece.

    The two columns are connected via the coupling capillary in the Live T-piece (red in the right image be-

    low). Because this coupling capillary has a flow resistance, we have to recognize two pres sures now:

    P2 after the coupling capillary and P3 before the coupling capillary. In the Straightmode everything re -

    mains like mentioned above at Pressures and flows are important. Just P3 has been added.

    The Live column switching

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    P1

    P2

    Atm.

    P1

    P2

    Atm.

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    And now the cutWe set P3 a bit lower than P2. The result is shown

    on the left. The components are flushed into open

    air as soon as they leave the first column.

    Because the pressure on the left hand side of the

    coupling capillary is lower than the pressure at the

    right hand side, all the gas from the first column is

    forced to leave via the cut outlet!

    If it really were that simple ...

    ... then we would be finished. Why does live switching therefore have to the adjusted? This we have

    done for you already in the factory. But it may be helpful for you, to understand the procedure anyhow:

    The live T-piece has 6 connections, of which the three right ones can be outputs. This means that a

    peak can be divided simultaneously amongst up to three outputs. And we can do without that!

    So we will inject a test mixture and monitor the detector signals at the three outlets. Then we have todecide, how to change the pressures P2 and P3, to get clear flow conditions forStraightand Cut:

    Straight

    Everything from the first column must enter thecoupling capillary, and everything from the coupling

    capillary must enter the second column. This func-

    tions reliably if the "red" flow is supplemented by

    the flows of the auxiliary inlets P2 and P3. The

    flow direction in the coupling capillary is from left to

    right.

    The Live column switching

    42 SAM-Manual_E.vp, Issue 06.05.2004

    P1

    P2P3

    Atm.

    P2

    P3

    P 3

    P 2P1

    P2

    P3

    Atm.

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    Cut

    Everything from the first column must pass on tothe cut outlet. This functions reliably if the "red"

    flow is supplemented by a sufficient flow of the

    auxiliary inlet P2. P2 also supplies the second col -

    umn. The flow direction in the coupling capillary is

    now inverted from right to left.

    The flow P3 decreases automatically.

    Backflush

    Backflushing functions exactly as described previously underTime for reflection. The position in which

    the live T-piece is currently being operated is irrelevant.

    The Live column switching

    SAM-Manual_E.vp, Issue 06.05.2004 43

    P2

    P3

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    Function description of electronics

    Overview

    The following block diagram shows the basic design of the electronics.

    RSP

    Real-time signal processor

    CACCommunication

    and analytical controller

    EPC

    Electronic pressure controller

    Function description of electr onics

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    Removal of electronic modules

    WARNING

    Observe the regulations for explosion protection if the MicroSAM is installed in a potentiallyexplosive atmosphere.

    When using the chromatograph in explosion hazardeous areas, a waiting time of 60 min.must be observed before opening the housing. After this time, the surface temperatures in-

    side the chromatograph have cooled to < 135C and the electrical charge of internal compo-

    nents will have reduced to an uncritical level.

    n Loosen the hexagon socket screw (1.5 mm) in the bottom cover of the MicroSAM by two rota-

    tions.n Unscrew the bottom cover. If the cover cannot be opened by hand, you can increase the lever

    arm e.g. by inserting two matching screwdrivers into the holes at the edge of the cover.n Loosen all electrical connections.n Loosen the six T30 Torx screws.

    n Carefully remove the RSP module.

    CAUTION: electrostatically sensitive devices!Before touching such components or modules:

    n Switch the chromatograph off.n Discharge all static from yourself by touching a grounded object or by wearing an ESD

    wrist band.n Only use tools which are free of static charges.n Do not touch any pins or printed conductors. Only hold modules on their edges.

    Function description of electr onics

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    n Loosen the four T10 Torx screwsn Loosen the three plug connections

    n Carefully remove the EPC module.

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    Fitting of electronic modules

    Fit in the reverse order to the removal instructions above

    CAUTION

    Make sure that the modules are fitted in the correct position:

    n The EPC module has three plug connectors. The side on which the connector is "missing"must point towards the cable bushing of the MicroSAM.

    n The RSP module has a cut-out. This must point towards the cable bushing of the Micro-

    SAM.

    n Carefully unscrew on the cover as far as possiblen Rotate the 1.5 mm hexagon socket screw in the cover (bottom red arrow) clockwise as far as possi-

    ble.

    WARNING

    The explosion protection regulations specify that the covers of the MicroSAM housing areprotected against unintentional opening by a locking screw.

    These screws must be loosened before opening.

    After locking, these locking screws must be tightened.

    n It is necessary to load the analyzer parameters after switching on the MicroSAM again. This is des -

    cribed in the documentation of the System Manager.

    Function description of electr onics

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    Spare parts

    Spare parts list

    Designation Or der No.

    Analyzer cover A5E00117263

    Insulation cover A5E00146499

    Small cover, analyzer circumference A5E00117261

    Inspection window A5E00196428

    Cable feed-through, with integrated cable A5E00140216

    RSP board A5E00102270

    CAC board A5E00102279

    EPC board A5E00104837

    Display board A5E00140232

    O-ring set with two of each 200x2 and 63x1.5 as well

    as six threaded pins M3x6A5E00209858

    Solenoid valve (NC) A5E00105041

    Solenoid valve (NO) A5E00162568

    Extraction tool for analyzer module A5E00209905

    Wrench for securing nut A5E00267144

    Securing nut for analyzer module A5E00160856

    Analyzer module type A01 A5E00209700

    Analyzer module type A02 A5E00209753

    Analyzer module type A03 A5E00209756

    Analyzer module typeA04 A5E00209765

    Analyzer module type A05 A5E00209774

    Analyzer module type A06 A5E00209800

    Analyzer module type A07 A5E00209802

    Analyzer module type A08 A5E00209808

    Spare parts

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    Index

    Index