Related Manuals for WIKA PASCAL ET-P
Summary of Contents for WIKA PASCAL ET-P
- Page 1 Operating instructions Multichannel Calibrator PASCAL ET, ET-P, ET/IS, ET-P/IS Documenting Multivariable Multichannel Calibrator PASCAL ET, ET-P, ET/IS, ET-P/IS...
- Page 2 5 - 84 Operating instructions ET, ET-P, ET/IS, ET-P/IS Rev. 10 – October 2017. © 2017 WIKA Alexander Wiegand SE & Co. KG All rights reserved. WIKA® is a registered trademark in various countries. Prior to starting any work, read the operating instructions!
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Page 3: Table Of Contents
Hold On – Hold Off ..........................65 6.5.3 6.5.4 Modification of the generation/simulation value ................... 65 Report ..............................66 6.6.1 Report of Tc/Rtd with dry well calibrator or dry block management ............ 71 Data Logger ............................77 WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... - Page 4 Maintenance ............................83 Cleaning ............................... 83 Recalibration ............................83 Dismounting, return and disposal .................. 84 Dismounting ............................84 Return ..............................84 Disposal ............................... 84 Declarations of conformity can be found online at www.wika.com. WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS...
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Page 5: General Information
Factory calibrations/DKD/DAkkS calibrations are carried out in accordance with international ■ standards. Further information: ■ Internet address: www.wika.de / www.wika.com Relevant Data Sheet: CT 18.02 Application consultant: Tel.: (+49) 9372/132-9986 Fax: (+49) 9372/132-8767 E-Mail: testequip@wika.de WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 6: Safety
Serious injuries and/or damage can occur should these not be observed. Further important safety instructions can be found in the individual chapters of these operating instructions. WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 7: Intended Use
Special operating conditions require further appropriate knowledge, e.g. of aggressive media. WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 8: Additional Safety Instructions For Instruments With Atex Approval Only Pascal Et/Is
Non-observance of these instructions and their contents may result in the loss of explosion protection. Battery operation: ■ Use only the rechargeable battery which is supplied by WIKA! Only charge the battery outside of the hazardous area! Operation of the serial interface in the hazardous area is prohibited. ■... -
Page 9: Special Hazards
In order to avoid any possible damage to the multichannel calibrator or the test ■ equipment, use the correct leads, the correct function and the correct range for the measuring application. WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 10: Labelling / Safety Marks
ATEX European Explosion Protection Directive (Atmosphère = AT, explosible = Ex) Instruments bearing this mark comply with the requirements of the European Directive 94/9/CE (ATEX) on explosion protection. IECEx for IEC 60079-0, IEC 60079-11 WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 11: Specifications
3 Specifications 3 Specifications WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... - Page 12 3 Specifications WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 13 3 Specifications WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 14 3 Specifications WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 15 3 Specifications For further specifications see WIKA data sheet CT 18.02 and the order documentation. WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
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Page 16: Design And Function
Temperature monitor switch ■ Thermocouple and thermoresistance ■ Compensation device (up to 4 in-out signals) ■ Electronic and pneumatic receiver ■ Electronic and pneumatic controller ■ Electronic and pneumatic recorder ■ Miscellaneous instrument WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 17: Scope Of Delivery
To avoid false measurements, charge the rechargeable batteries as soon as the battery indicator appears. If the batteries run too low the Pascal ET, ET-P, ET/IS, ET-P/IS will automatically shut down. Use only the original AC/DC converter which is supplied by WIKA WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 18: Transport, Packaging And Storage
2. Place the instrument, along with shock-absorbent material, in the packaging. 3. If stored for a prolonged period of time (more than 30 days), place a bag, containing a desiccant, inside the packaging. WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 19: Commissioning, Operation
■ Electrical and temperature signals generation/simulation ■ Pressure generation and regulation ■ Environmental parameters measurement Many different configurations are available according to the specific requirements of the user. WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 20: Input Module For Electrical/Temperature Signals
The following figure shows the output module for electrical/temperature parameters. Figure 2 – Output panel module The 2 INPUT cards and 2 OUTPUT cards are plug and play modules and can be installed by the user himself. WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 21: Pressure Module
It can be inserted in the front panel in place of OUT A or OUT B module. It is a fully galvanically isolated board (like IN and OUT modules) from internal electronics of the Pascal. WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... - Page 22 Please consider, if the user enable the internal load resistance, this will be connected between the +HART and COM terminals. Here same examples: Transmitter HART slave Figure 4 - Case 1: 24V from module, 250Ω from module WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 23 6 Commissioning, operation 250 Ω Transmitter HART slave Figure 5 - Case 2: 24V from module, 250Ω external Transmitter 24V ext. HART slave Figure 6 - Case 3: 24V external, 250Ω from module WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
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Page 24: Environmental Parameters Module (Optional)
The Pascal ET, ET-P, ET/IS, ET-P/IS are multifunction calibrators. The electrical modules can be maximum four, two of them are input modules (IN A – IN B), and the other two are output modules (OUT A – OUT B). WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 25: Electrical Measurements
(-100…100) mA 0.0001 mA Resistance (0…400) Ω 0.001 Ω (0…10000) Ω 0.01 Ω Frequency (0.4…50000) Hz 0.001 Hz Pulse 0,4…20 Hz Contact Open - Closed Table 1 - Range of input signals WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 26: Thermocouple Measurements
This temperature value is used for compensation. The Standard connector Mignon for thermocouple is shown in Figure 1. The thermoresistance for compensation of the reference cold junction is integrated in the same connector. WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 27: Thermoresistance Measurements
In the case of three wires connection the pin identified with the writing 3W must also be used. While for the four wires measurement, the most accurate of the above, is performed by using all four pins. WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 28: Generation Of Electrical Parameters
150…1760 0.01 -50…1760 170…1760 0.01 50…1820 920…1820 0.01 -200…400 -160…400 0.01 -200…760 -200…760 0.01 -270…1300 0…1300 0.01 -270…1000 -200…1000 0.01 0…2300 0…2000 0.01 -50…1410 -50…1410 0.01 Table 5 – Thermocouple simulation table WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 29: Thermoresistance Simulation
In generation or simulation on any particular channel the simulated value can be rapidly changed by pressing immediately to the right of the simulated value. By pressing the displayed value a virtual numerical keyboard appears. WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 30: User Interface
5. Key for selecting the field options of the selected module (where applicable), i.e. Tc or Rtd type 6. Key for selecting the unit of the selected field (where changeable) 7. Line for display status messages when active (i.e. filter, ramp, offset, etc…). WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... - Page 31 Figure 10 – Typical display of Pascal ET, ET-P, ET/IS, ET-P/IS with 4 windows 8. Selection of the Channel Role (None, REF, DST) 9. MAX and MIN values indication. Press the button to reset data WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
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Page 32: Channel Configuration
Channel Letter located in the top left corner of the corresponding Channel Window, is indicated in white on grey background or not. See figure below. Figure 11 – Channel A selected WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... - Page 33 Figure 12 – Changing the Channel Letter By pressing and keeping pressed the key Q the following screen appears: Figure 13 – Selecting the Channel Letter Press the “Channel C” button to assign the Channel. WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 34 The following screen appears (depending on the installed modules): Figure 15 – Source selection As we need to measuring from the input, select the option “IN A”: The screen will change as follows: Figure 16 – IN A Selected WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 35 It is also possible select an Rtd type “User” if not listed in the pre-defined options. To select the Rdt type “User” press the button indicated with “Q” on the figure above. WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 36 By pressing and keep pressed that button you can enter the pages for setting the desired parameters related to the custom or user thermoresistance (Ptd). WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 37 X * 10 °C X * 10 °C Resistance @ t = 0,01 °C Value Further specific parameters can be also configured for the already configured channel by pressing the button WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
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Page 38: Other Assignments
The particular channel is selected by pressing the channel letter (the background of the button changes in gray) Then, press the button indicated with “Q” to assign the desired functional module: Figure 23 – Channel assign selection WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... - Page 39 = absolute pressure). This information is displayed under the writing PE-1 (first external sensor) or PE-2 (second external sensor). See the figure above as example. When the sensor has been selected, the following screen appears: WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 40 REF and a DUT channel has to be done. The resolution can also be changed based on the desired number of decimal digits (related to the selected engineering unit): Figure 27 – Sensor range setup WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS...
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Page 41: Thermocouple Signal Measurement
Channel A. In this case press the button “IN A” to measuring from the input. The main screen changes as follows: WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... - Page 42 Figure 31 – Selecting the unit “Tc” for the module “IN A” Press the button “Tc” and the main screen changes as follows: Figure 32 – Module “IN A” with unit “Tc” selected WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 43 Press “R” first in order to change the Cj type into external Cj type (E), then keep pressed the button “R” (a semi triangle symbol on the bottom right corner of the button “R” appears”: Figure 33 – Tc parameters selection: External Jc type (manual) WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
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Page 44: Electrical Parameter Measurement
Channel A. In this case press “IN A” for measuring from the input. The main screen changes as follows: WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... - Page 45 Tc and the following screen appears: Figure 37 – Selecting “mA” unit for module “IN A” By selecting the unit mA the following screen appears: Figure 38 – Unit “mA” selected for module “IN A” WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
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Page 46: Temperature Simulation
In this case the option OUT A or OUT B should be selected. From the main screen, now the loop type must be selected between: passive (the calibrator Pascal supply the current loop) or active (current loop supplied externally): WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 47: Channel C Or D - Mathematic Functions
C, or D, then the button for selecting the source: Figure 42 – Selecting module Calc Pressing CALC the followings screen is displayed: Figure 43 – Selecting assignment of channel Calc WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... - Page 48 Otherwise the channel 4 will be displayed as: Figure 45 - Calculation non possible for the Channel 4 WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 49 6 Commissioning, operation For the Cell Load, the channel 4C or D can calculate the result coming from a load cell connected as per the below scheme: Figure 46 – Cell Load connection WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 50 Moreover, on channel 4C or D, the SCALING function can be assigned through the menu CHANNEL SETTINGS (button ) in order to display an engineering unit more appropriate (for example Kg or a pressure unit). Figure 48 – Cell Load calculation with Scaling function active WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS...
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Page 51: Hart Channel Assignment
Then, press the button indicated with “Q” to assign the desired functional module: Figure 49 – HART Channel assign selection The following screen appears: Figure 50 – Selecting the source “HART” WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... - Page 52 Here the user has the possibility to change some HART parameters: Select the channel with active HART communication (in this case the channel A) Push the button Channel Settings to open the following screen: WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 53 Push the button “HART FUNC” and the following screen appears: Figure 54 – HART function screen Push the button “DATA” to display the HART data: Figure 55 – HART data display WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
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Page 54: Hart Trimmer Calibration
If the user wants to recalibrate the Trim. an INPUT mA measurement channel has to configured as REF channel. In addition, the loop wiring needs to flow to the IN mA terminals. If no REF mA Input channel is configured first an error will be shown. WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... - Page 55 The HART instrument is put in fixed mode generation (4 or 20 mA) and the REF channel is measuring the true analog mA generation. To re-align to the correct 20 mA (or 4 mA) generation press “CALIBR.” button. If needed follow the same procedure for “Zero Trim”. WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
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Page 56: Hart Scale Adjust
Now set the REF Channel to the desired value that permits to output the transmitter the 20mA value (example 150°C). When the value is stable press ADJ. URV button. Now the transmitter will generate 4 and 20 mA between 20 °C – 150 °C. WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 57: Setting Channel, Function, Instrument
If, for example, the channel is configured for thermoresistance measurements, by pressing the button “Chanel setting” the screen could be show the following parameters: Figure 56 – “IN” Channel setting WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... - Page 58 With this function the user can program a ramp by automatically shifting the generation value in configurable steps. If both the 2 generation board are installed, and they are been assigned to two different channels, a different ramp for each output can be programmed. WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 59 Go back to the previous screen and press the button “RAMP ON” shortly to run the ramp function: the calibrator will show the main screen and on the output channel the indication “ramp” will appears (ramp active on channel B). WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
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Page 60: Functions Setting
Figure 61 – Functions setting Here the user can set different functions grouped by: REPORT PRESET LOGGER MEMORY REPORT section: This section is intended for the reports management. For detailed information see chapter 6.7 WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 61: Instrument Setting
WILL NOT be deleted but a certain time should be necessary to complete the process. 6.4.3 Instrument setting This menu enables to see and change the settings of the instrument. Figure 62 – Instrument setting screen WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 62: Setting The "F" Key Of The Keyboard
Hold All ON/OFF: press the F key to enable/disable the HOLD function on all active measuring channels. Recall Report list: press the F key load the list of the saved reports Recall Preset list: press the F key load the list of the saved presets WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 63: Channel Settings
Offset Off function is activated (the button shows the indication “Offset on”). The text “OFS” on the blue bar of the main screen indicates that the function is activated. WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 64: Scaling
“Signal”. The following screen shows two channels and the first one displays the active Scaling function: WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 65: Hold On - Hold Off
Figure 70 – Channel with HOLD enabled 6.5.4 Modification of the generation/simulation value The generated/simulated value of an Output card or KEY can be modified from the main screen directly, by pressing the value: WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 66: Report
For the DUT: remember to define the max error and the declaration. A bargraph will be displayed on the DUT channel. When the channel is device under test, the symbol DUT will appear. Options are available on the screen for the Functions Setting (see paragraph 6.5.2.): WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... - Page 67 Press SETUP to create a new Report. Info required are: Report name DUT model (Device Under Test) DUT Serial Number (Device Under Test) Operator Job Number Found Left Up Down N. Points WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 68 Once completed Press STORE per memorize the data. The following screen will appear: Figure 76 – Store Report request Press YES to store the report set up and then press again yes to run the report. WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 69 Press again OFFSET OFF to come back to the original configuration: OFS will disappear. Once the last calibration point is done, press STORE (or ABORT): the Report will end automatically and the display will go back to its original configuration. WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 70 Selecting the area with light grey background next to the report name, the SETUP of the report will be displayed: Figure 80 – Display Report setup WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS...
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Page 71: Report Of Tc/Rtd With Dry Well Calibrator Or Dry Block Management
Pascal calibrator is able to connect to some dry well calibrators and automatically set the temperature value e and detect the reached stability in order to automatically store the temperature points and then run the test autonomously. WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... - Page 72 • WIKA model CTD-9100-1100 • Giussani’s dry well calibrators Pyros Series The models of the WIKA CTD-9100-x Series require an adapter kit for the conversion from RS-232 to RS-485. The order code for the kit is: 241113. NOTE: for some dry well calibrators a switching on safety condition could prevent the automatic setting of a set point.
- Page 73 “not defined” otherwise the Pascal Report software will be not able to run the proper report type. “Dry well type”: select the dry well calibrator connected to the Pascal calibrator WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 74 This allows to detect a stable temperature value. The value describes above depend of the type of the connected dry well calibrator and its setting specifications. Consider the following chart: WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 75 Importing the Report on a PC by using the Pascal Report Software: The report can be imported on a PC when completed in order to be printed. The software will use the proper template based on the set “thermocouple” or “RTD” parameter: WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
- Page 76 6 Commissioning, operation This template differs from the standard one in some freely settable fields as indicated below: This template will also shows the errors in the set engineering unit and not in percentage. WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS...
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Page 77: Data Logger
The flashing of the disc icon, on the bottom right side of the screen, shows that the LOGGER is active. The data will be stored on all 4 Channels (if assigned) simultaneously WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 78: Communication
Witk the Software Program PascalReport, all reports can be downloaded to a PC. Through the Software Program PasLog, all logs can be downloaded to a PC. Following configuration is required for the download of the data: press the button WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 79: Calibration Examples
Set a channel for mA reading at the inputs IN A or IN B (if present), assigned as DUT Enable the 24 V power supply by pressing the button from the side bar Make the connections as indicated on the picture above WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 80: Example 2 - Calibration Of Ptz Gas Volume Converters
(IN B) as REF (Reference), In this way the two measures can be compared, the calculated error is reported on the calibration report. The figure below shows the connection of the calibrator WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... - Page 81 6 Commissioning, operation Comparison method Reference RTD DUT RTD Thermostat (Liquid Bath – Dry Block) Figure 90 – 4-wire thermoresistance calibration example WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...
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Page 82: Example 4 - Calibration Of Thermocouples
You must also select the cold junction compensation if the internal, external or assigning a compensation value. The figure below shows the connection of the calibrator: Comparison method Reference TC DUT TC Thermostat (Liquid Bath – Dry Block) Figure 91 – Thermocouple calibration example WIKA Operating Instruction, Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 83: Maintenance, Cleaning And Servicing
12 months. Every factory recalibration includes, additionally, an extensive free- of-charge check of all system parameters with respect to their compliance with the specification. The basic settings will be corrected if necessary. WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS... -
Page 84: Dismounting, Return And Disposal
Only disconnect test- and calibration installations once the system has been depressurised! Return WARNING! Strictly observe when shipping the instrument: All instruments delivered to WIKA must be free from any kind of hazardous substances (acids, bases, solutions, etc.). When returning the instrument, use the original packaging or a suitable transport package. - Page 85 Tel. (+48) 542 3011-00 poration (Thailand) Co., Ltd Fax: (+48) 542 3011-01 850/7 Ladkrabang Road, E-Mail: info@wikapolska.pl Ladkrabang www.wikapolska.pl Bangkok 10520 Tel. (+66) 2 326 6876-80 Fax: (+66) 2 326 6874 E-Mail: info@wika.co.th www.wika.co.th WIKA Operating Instruction, Model Pascal ET, ET-P, ET/IS, ET-P/IS...