Perfection in per formance, equipment and design

WT3 and WK3 Temperature and Climate Test Chambers

Weiss Umwelttechnik GmbHSimulationsanlagen Messtechnik

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The product range comprises testsystems of all test chamber volumesfor temperature and climatic testing,simulation of exposure to weather,temperature shock, corrosion andlong-time testing – in research, development, quality control andproduction.

Walk-in systems and in-line plantsare designed, produced and instal-led in accordance with customerspecifications.

An excellent after-sales service en-sures optimum support for our cu-stomers and a high degree of opera-tional safety of our systems.

Characteristics, function and servicelife of systems or components areinfluenced by varying thermal andclimatic conditions during trans-port, storage and use.

For this reason, tests have to be carried out in order to safeguard andoptimise the quality of the product.

The temperature and climate testchambers produced by Weiss Um -welt technik set standards with re-gard to ease of operation, perfor-mance and equipment.

Weiss Umwelttechnik GmbH is oneof the leading manufacturers of testdevices and systems for environ-mental simulation worldwide.

Reliable test results by means of reproducible environmental conditions

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Perfection in perfor-mance, equipmentand design ...

Performance optimised climateand temperature conditioning system creates power reservesfor your tests

a separately activatable condensa-tion protection prevents conden-sation formation on the specimen

Stainless steel ports (approx. Ø 50 and 125 mm) for insertingthe supply lines – even in thestandard version of the equipment

Self-cleaning humidity sensorwith considerable increase of theservice life

Optimised guidance of the airand temperature distribution –better than ± 1.5 K spatially guaranteed

For very safe operation the testchambers are designed for ex -treme environmental conditions

Compliance with demanding state-of-the-art test standards bymeans of increased humidi ficationoutput

Large water container easily accessible

Low noise level

Operation, monitoring and docu-mentation of the test systemwith the control and monitoringsystem S!Mpac*

8’’ TFT-colour touch screen displaywith simple, menu-guided userinterfaces as a convenient inter-face with the operator (no pro-gramming knowledge nece ssary)

Lighted CONTROLPAD* for displaying the operating modeand the actual values in the frontof the test chamber (if the systemis equipped with 8’’ and 12’’ TFT-colour touch screen display)

USB and Ethernet interface

Networking with other test systems possible

Remote control and remote monitoring possible via intranetor internet

Integrated recording of measure-ment data for a complete docu-mentation of the test procedure

High-precision temperature andclimate conditions due to auto -adaptive control

Integrated service information system

Standard humidity bath flushingto prevent contamination of hu-midification water

Long-time testing 85 °C/85% r. h.– our WK3 climate test chambersare the solution

Factory calibration of temperatureand humidity values is part ofour standard

Supply connections located in acentral and protected position inthe rear part of the device

For further equipment details please see page 8.

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Patented temperature condi -tioning and climate technology

An airstream that is temperatureconditioned and/or air conditionedprecisely continuously flows throughthe test space of the unit and ensu-res an optimum spatial distributionof air and temperature. Generously dimensioned axial fanswith an external drive motor drawthe air out of the test chambers intemperature and air-conditionedpro cess. The circulating air thenflows through a fin-type heat ex -changer in which it is cooled if required. For heating of the circula-ting air an electrical heater is in -stalled behind the heat exchanger.

Reliable conditions

Due to special circuits any undesi-red formation of condensate is pre-vented to ensure the best possibleconstancies in terms of temperatureand humidity. To ensure a high relative humidityeven with a heat load the air passesover a water bath. Integrated heatelements ensure quick and preciseheating of the water. For exact control of humidity in thetest space the humidity is measuredpsychrometrically. Here, the humidity sensor is wettedautomatically and cleaned in theprocess.Due to this technology the servicelife of the test chamber considerablyincreases.

The sully developed 32-bit controland monitoring system of S!Mpac*

ensures controlling of temperatureand humidity.

The units are compatible with theS!MpaTI* software package and canbe integrated into their networkingenvironment (data logging operationin S!MpaTI*).

The functional principle … Humidity diagrams:

1 = Standard working range

2 = Dewpoint range +4 °C …-3 °C discontinuously

3 = Dewpoint extension from -3 °C …-12 °C controlled (option: compressed air dryer)

4 = Dewpoint extension to -20 °Ccontrolled (option compressedair dryer and capacitive sensor)

Tem

per

ature

in °C

Relative humidity in %

Dewpoint temperature in °C

100

90

80

70

60

50

40

30

20

10

0

0 10 20 30 40 50 60 70 80 90 100

100

90

80

70

60

50

40

30

20

10

0-20 -10 0 10 20 30 40 50 60 70 80 90 100

WD

i a

00

2a

Tem

per

ature

in °C

4 3 2 1

4 3 2 1

Stainless steel test space

Humidity sensor

Access to water tank

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Perfectly manufactured

The external housing is made ofcorrosion-resistant, galvanised steelsheet and solvent-free powder coa-ted. The stainless steel test space iswelded vapour-tight. Its environmen-tally friendly insulation gua ran teesthe best possible insulation valuesand, hence, the lowest possible ope-rating costs.

Even in the standard version of theequipment all sizes are equippedwith two standard stainless steelports (approx. Ø 50 and 125 mm).They can be used for inserting mea-surement and control cables, othersupply connections or additionalequipment.

Safe design

The test chambers are equipped withan adjustable safety cut-out againsthigh and low temperatures (testspecimen protection with separatesensor) according to EN 60159-2(1993). Any safety alarm is issuedvisually as well as acoustically.

The door latch ensures an optimumclosing pressure while ensuringprotection against excess pressureat the same time. The large obser-vation window which is availableas an option allows an optimumview of the test space and it isequipped with multiple glazing andheated in order to prevent the for-mation of condensate.

A potential-free contact is availableon the test chamber. Every electricalfunctional circuit is equipped withits own safety facility which shutsdown the functional circuit affectedor the entire test chamber in case ofa malfunction. The electrical systemcomplies with the approved stateof the art in the field, the safety regulation “Electrical Systems andFacilities” (BGV A3) as well as withthe relevant VDE regulations. Alltest chambers fulfil the EMC, low-voltage and machinery directive.The hermetic refrigeration circuitsoperate with environmentally frien d-ly refrigerants (CFC-free).

Design features ...

Ready for use

A quality inspection of every testunit is effected before delivery. Theyare designed ready for plug-in andare directly ready for use. There isno need for an assembly on site.

Stainless steel port

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Comfortable operation

The units WT3 and WK3 are equippedwith an 8’’ TFT-colour touch screendisplay. In addition, an easily readableCONTROLPAD* is integrated into thedoor, started and stopped throughtest cycles, and actual values for tem-perature and humidity can be easilyread. Simple, menue-guided user in-terfaces are the convenient interfacewith the operator. There is no needfor programming knowledge.

With the integrated process visu -alisation, the device function is ex-plained in a way that is easy to un-derstand.

Control and program control with the digital measurement and control system S!MpaC*

8” TFT-colour touch screen display and CONTROLPAD* (standard)

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Numerous ways of networking

Control is governed by the 32-bit-I/O system with integrated soft-PLC.A webserver can place test and diagnostic information into the in-tranet via Ethernet, if desired. The devices can be reached andoperated from almost any place inthe world. All it takes is networkaccess to the device's webserver inthe intranet or in the internet, if activated accordingly.Standard interfaces are Ethernet100 /10 megabit and USB for exter-nal storage of measurement dataon a USB stick. Four potential-freeoutputs and four inputs (24 V-DC)are available for test specimen con-trol.

3,5” TFT-colour touch screen display (option)

12” TFT-colour touch screen display andCONTROLPAD* (option)

Fully developed software

With the optionally available S!MpaTI*

software, you have the optimal sy-stem for operation and control ofthe test system. The software notonly permits evaluation and docu-mentation of the test sequences,but also allows problem-free inte-gration of the system into a PC net-work. Archiving of the data and parameters is always ensured withthe S!MpaTI* software.

Alternatively equipped with12’’ or 3.5’’ TFT-colour touchscreen display

As an alternative, the test chambercan be equipped with a 12’’ TFT-co -lour touch screen display. The 12’’display contains an industrial PC including the Windows softwarepackage S!MCONTROL*, which ma-kes the test chamber into a purecommunication marvel. Simulationprograms and test results are stored on the integrated hard diskand can be easily exchanged viaUSB interface.All test information can be called upby touch. Tests can be programmedwithout complication using a gra-phic editor.

In an additional option, the devicecan be equipped with a 3.5’’ TFT-colour touch screen display (320 x240 px). The display is integratedin the door in place of the CON-TROLPAD* and is delivered with theS!MpaTI* program tool for simplecontrol of the test chamber. The3.5’’ display thus ensures optimaloperation of the system at a favou-rable price.

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Digital measuring and control system S!MPAC*

8’’ TFT-colour touch screen display

Controlpad* for displaying of temperature values, lighting,start/stop, etc. on the front panelof the device

Auto-adaptive control system

Ethernet and USB interface

Psychrometric humidity measure-ment with automatically wetted,self-cleaning sensor

Protection against condensationon test specimen

Refrigeration unit, air-cooled

Stainless steel ports approx. Ø 50 mm and 125 mm in the leftand right side panel

Safety cut-out against high andlow temperatures (protection oftest specimen as per EN 60519-2(1993) adjustable, with separatesensor

Insertion rack (stainless steel)

Adjustable and vibration ab sorbing feet

4 digital outputs (24 V-DC), 4 digital inputs (24 V-DC)

Potential-free contact for specimen disconnection

2 temperature values are cali brated (+23 °C and +80 °C)

Additional equipment for WK3series

Integrated limit value monitoringsystem for humidity

Large water tank, easily accessible

Automatic feeding in of additionalwater without interruption ofoperation

Display of the humidity values at the Controlpad*

Humidity bath flushing for cleaning of the humidifier water

2 climate values are calibrated(23 °C/50% r.h. and 95 °C/50% r.h.)

12’’ TFT-colour touch screen display with integrated industrialcomputer

Uninterruptible power supply (UPS)for integrated PC for pro tectionagainst data loss in case of short-term interruptions of power supply(only with 12’’ TFT-colour touchscreen display)

3.5’’ TFT-colour touch screen display (without Controlpad*)

S!MPATI* software package forWindows, as off XP

Test space door with observationwindow including optimised testspace lighting

Door with hand-hole port

Door hinged on right side

Water-cooled version for coolingtower, chilled water or mains water

Mobile installation by means ofmoveable version

Speed-controllable fan in order tovary the circulating air volume flow

Fresh air purge facility in order tokeep the air in the test chamberclean

Shelves for optimum use of thetest space

Stainless steel ports approx. Ø50, 80 and 125 mm for connectionof the test specimens

Temperature measurement on the test specimen

Interface RS 232 C and further interfaces upon request

Other voltages and frequencies

Digital I/O, 4 inputs and 4 outputs

Calibration in deviation to thestandard

Additional calibration (WKD –Factory Calibration and DKD –German Calibration Service)

Reinforced test chamber floor up to 150 kg (200 kg from 600 l)

Floor for heavy loads up to 500kg (only available as of 600 l)

Flat notches or notches for the fixed placement of connected testspecimens

Ports in the area of the roof

Upgradeable for special test regulations (automotive, photo-voltaic, etc.)

Additional equipment for WK3series of models

Dewpoint extension in climateworking range up to -12 °C controlled

Independent capacitive humiditysensor (temperature and humi -dity measurement)

Pressure-resistant deminerali -sation cartridge

Dewpoint extension in climateworking range up to -20 °C controlled

Further options/special accessories, tailor-made foryour special requirements,upon request.

Standard version Options

Main switch, test specimen protection and interfaces

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180/ 180/ 340/ 340/ 600/ 600/ 1000/ 1000/ 1500/ 1500/40 70 40 70 40 70 40 70 40 70

190 190 335 335 600 600 990 990 1540 1540

750 750 750 750 950 950 950 950 950 950

580/ 580/ 580/ 580/ 800/ 800/ 1100/ 1100/ 1100/ 1100/

5404) 5404) 5404) 5404) 7604) 7604) 10604) 10604) 10604) 10604)

450 450 765 765 800 800 950 950 1475 1475

1805 1805 1805 1805 2005 2005 2005 2005 2005 2005

780 780 780 780 1000 1000 1300 1300 1300 1300

875 875 875 875 1095 1095 1395 1395 1395 1395

1385 1385 1700 1700 1750 1750 1925 1925 2450 2450

1545 1545 1860 1860 1910 1910 2085 2085 2610 2610

+180 +180 +180 +180 +180 +180 +180 +180 +180 +180

-42 -72 -42 -72 -45 -75 -45 -75 -45 -75

4.0 3.0 4.0 3.0 3.0 2.5 3.0 2.5 2.5 2.3

4.0 4.0 3.2 3.0 4.0 4.0 4.0 4.0 3.5 3.5

1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0

2300 1500 2300 1500 2500 2500 4500 3000 4200 3000

±0.1 to ±0.5

±0.5 to ±1.5

+23 and +80

only WK3

+10 to +95

+4 to 94 (up to -3)7) (up to -12)8)

10 to 98

±1 to ±3

±0.1 to ±0.3

±0.5 to ±1.0

400 400 400 400 500 500 500 500 500 500

+23 °C / 50 % r.h. and +95 °C / 50 % r.h.

3/N/PE AC, 400 V ±10 %, 50 Hz9)

CEE connector, 16 A CEE connector, 32 A

IP 54

4.1 4.9 4.1 4.9 7.8 9.1 11.5 13.8 11.5 13.8

12.5 14 12.5 14 15 19 22 29 22 29

56 57 56 57 61 62 62 63 62 63

optionally air-cooled / water-cooled

425 460 490 500 620 680 840 955 1020 1130

WT3 series of models and WK3 series of models

Permissible ambient conditions from +10 to +35 °C and max. relative air humidity of 75 %.1) Overall dimensions – the external dimensions can be reduced by dismantling components2) Between +125 °C and -25 °C for the models …/ 40 and +125 °C and -40 °C for the models …/ 703) The performance data refer to +25 °C ambient temperature, 400 V nominal voltage, without specimen,

with additional equipment and heat compensation, with water cooling at a flow temperature of 28 °C4) Width between the shelf supports5) According to IEC 600 68-3-5, in temperature range from +180 to –40/-70 °C6) Referring to the adjusted setpoint value in the temperature range of a minimum temperature to 150 °C7) Intermittent operation8) Dewpoint extension as an option9) Other voltages and frequencies as an option

10) In the range from +25 °C to 95 °C and <90 % r.h.11) Measured in 1.60 m height under free field conditions at 1 m distance from front of the system

We reserve the right to make any technical alterations.Some equipment photos show chambers with optionalaccessories.

Type WT/WK

Test space contents Litre

Test space dimensions Height approx. mm

Width approx. mm

Depth approx. mm

Outside dimensions Height approx. mm

Width approx. mm

Width1) approx. mm

Depth approx. mm

Depth1) approx. mm

Performance for temperature tests

Maximum temperature °C

Minimum temperature °C

Temperature changing rate cooling K/min3+5)

Temperature changing rate heating K/min3+5)

Temperature changing rate linear K/min2+3)

Maximum heat compensation W3)

Temperature constancy in time K

Temperature homogeneity in space K6)

Calibration values °C

Performance for climate tests

Temperature range °C

Dewpoint temperature range °C

Humidity range % r.h.

Humidity constancy in time % r.h.

Temperature constancy in time K

Temperature homogeneity in space K6)

Maximum heat compensation W3+10)

Calibration values

Electrical connection

Type of protection, electrical parts, max.

Electrical connection approx. kW

Max. current consumption approx. A

Sound pressure level11) approx. dB(A)

Condenser

Weight kg

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The standards – we have the proven solution

IEC 68-2-38 Test Z/AD, Fig. 2a

DIN IEC 68-2-30 Test Db, Version 1(humid heat, cyclic)

DIN IEC 68-2-14 Test Nb(Temperature change with defined rate, one-chamber method)

End of the temperature rise

Rel

ativ

e hum

idit

y in

%

Rel

ativ

e hum

idit

y in

%

Relativehumiditynot defined

Time inhours

Air

tem

per

ature

in

the

test

cham

ber

in °C

Air

tem

per

ature

in

the

test

cham

ber

in °C

Start of temperature decrease

ZeitUpper temperature +2 ºC

*Time tolerances at these points ±5 min.

1st cycle

TA = lower temperatureTB = upper temperatureA = beginning of first cyclet1 = dwell time

2nd cycle

Upper temperature -2 ºC

Tem

per

ature

in

the

test

cham

ber

Time t

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Walk-in temperature and climate test chambers of modular construction, series M.C.S.The walk-in temperature and climatechambers of the WT/WK series werespecially developed for large testobjects.

The test chamber is available in 5standardized sizes (8, 12, 17, 22,27 m3). The machine unit comprisesa fan, refrigeration unit, humidifi ca-tion and heating equipment, switchcabinet and system control.

It is completely pre-assembled andtested at the Weiss factory andconnec ted to the installed cel on site.

Thus, the installation time on site isreduced considerably.

Depending on the customers require -ments, we can configure the completesystem. For configuration purposes,we simply require the following data:

Desired mode of operation (temperature or climate tests)Desired cooling or heating rateDesired test chamber size

Special ranges and sizes are possi-ble on request. Please contact us.

Test systems for professionals. Test the best …

A complete product range for tem-perature and climate testing is avail -able, with test space volumes of ap-prox. 34 litres to 2160 litres andworking ranges of –75...+180°C and10 ... 98 % r.h.In addition, we also offer an exten -sive selection of proven test systemsfor simulating exposure to weather,temperature shock, corrosion andlong-term testing for research, de-velopment, quality assurance andproduction.

As one of the leading manufacturersof simulation systems worldwide,Weiss Umwelttechnik offers the entirerange of high-quality test equipment:from economical series devices towalk-in systems process-integratedsystems built to customer specifi -cation.

A high-performance after-sales ser-vice ensures the optimal support forour customers and high operationalsafety of the systems. Decades ofexperience in the various fields ofapplication and an intensive ex -change of information with our cus -tomers throughout the world all ser-ve to guarantee good co-operation.

If you value know-how, service andall-round safety, ask Weiss Umwelt -technik.

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Weiss Umwelttechnik GmbHSimulationsanlagen Messtechnik35447 Reiskirchen-Lindenstruth / Germany • Greizer Str. 41 –49Telefon +49 6408 84-0 • Telefax +49 6408 84-8710www.weiss.info • E-Mail: info@wut.com

www.weiss.infoFurther information, offices in Ger many, sub sidiaries and represen tativesworldwide are avail able at