Process Calibration Tools Catalog EN

Suggested test tools Simulating thermocouples and RTDs for calibration and testing Thermocouples and RTDs are the most common sensors used in process temperature measurements. Simulating a process sensor signal into a process instrument or control system input enables a technician to verify whether the device responds correctly to the temperature measured by the instrument. There are many different ways to simulate these sensors for testing purposes. You can use a mV dc source and a mV vs temperature look up table (below on the left), for simulating thermocouples or a resistance decade box and resistance vs temperature look up table (below on the right), for simulating RTDs. This method, however, has become outdated with modern temperature calibrators that do the conversion for the user. With modern calibrators, simply select the sensor type to simulate, input the temperature to source and connect to the devices under test. Thermocouple Table – Temperature vs mV RTD Table – Temperature vs Resistance °C 0 1 2 3 0 0.000 0.039 0.079 0.119 10 0.397 0.437 0.477 0.517 20 0.796 0.838 0.879 0.919 30 1.203 1.244 1.285 1.326 40 1.612 1.653 1.694 1.735 50 2.023 2.064 2.106 2.147 60 2.436 2.478 2.519 2.561 70 2.851 2.893 2.934 2.976 80 3.267 3.308 3.350 3.391 90 3.682 3.723 3.765 3.806 100 4.096 4.136 4.179 4.220 °C Ohm Diff. 0 100.00 0.39 1 100.39 0.39 2 100.78 0.39 3 101.17 0.39 4 101.56 0.39 5 101.95 0.39 6 102.34 0.39 7 102.73 0.39 8 103.12 0.39 9 103.51 0.39 °C Ohm Diff. 10 103.90 0.39 11 104.29 0.39 12 104.68 0.39 13 105.07 0.39 14 105.46 0.39 15 105.85 0.39 16 106.24 0.39 17 106.63 0.39 18 107.02 0.39 19 107.40 0.38 °C Ohm Diff. 20 107.79 0.39 21 108.18 0.39 22 108.57 0.39 23 108.96 0.39 24 109.35 0.39 25 109.73 0.39 26 110.12 0.39 27 110.51 0.39 28 110.90 0.39 29 111.28 0.38 7526A Precision Process Calibrator See pg 5 726 Precision Multifunction Process Calibrator See pg 6 754 Documenting Process Calibrator See pg 5 714B Thermocouple Temperature Calibrator See pg 17 712B RTD Temperature Calibrator See pg 17 50 Temperature Applications