Thermocouples and RTDs are the most common sensors used to measure process temperature. Simulation of the process sensor signal to the process device or control system input allows the technician to check whether the device responds correctly to the temperature measured by the device. There are many methods for performing RTD imaging and thermal amplification for experimental purposes.
Both RTDs and thermocouples belong to the category of temperature sensors that can be used in a wide variety of applications. However, they are completely different and can be used depending on your consumption. https://councils.clark.edu/eportfolios/8011/
To simulate a thermocouple or a decade box resistor and a temperature-to-temperature coating table To simulate RTD, you can use the mV dc source and the mV temperature coating table. However, this method is obsolete with the modern temperature calibration that performs the conversion for the user. Using modern calibrations, simply select the type of sensor for imaging, enter the temperature at the source, and connect to the devices being tested.
A thermocouple is an electrical device consisting of two dissimilar electrical conductors forming an electrical junction. A thermocouple produces a temperature-dependent voltage as a result of the thermoelectric effect, and this voltage can be interpreted to measure temperature. Thermocouples are a widely used type of temperature sensor.
How to perform the test using RTD and thermocouple simulation
To use a thermocouple simulator to test a device with thermocouple input:
Disconnect the process measurement sensor and connect the test connection wires in place (Fig. A).
Connect the mini connector from the test wires to the TC source of the calibrator.
Connect a DMM or other measuring tool to the mA port of the tested device.
Verify the range of the devices or their range of adjustment. Apply the value 0% using the simulator and verify using the DMM the value of the mA or the output voltage as expected.
Repeat the test, applying the 50% and 100% temperature signals.
If the measured output of the instrument is within limits, the test is complete. If not, set the device to zero (offset, 0%) and range (gain, 100%).
Repeat steps 4 and 5 and make sure the answer is correct.
To use an RTD simulator to test a device with RTD input:
Connect the calibration to the device input as shown in Figure B.
Connect the calibration output with the correct combination to match the device configuration (2, 3 or 4 wires).
Use the test procedure on the left to test a thermocouple, starting with step 3.
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