Fluke 725Ex - Lower Display Thermocouple Measurement Tests

Multifunction Process Calibrator
Performance Tests
23
Lower Display Thermocouple Measurement Tests
1. Remove the test leads from the UUT terminals; then connect a type J thermocouple
lead between the TC jack on the UUT and the TC jack on the 5520A as shown in
Figure 10.
2. Press T on the UUT until J appears on the lower display. If necessary, press D
so the temperature is displayed in °C.
3. Set the 5520A to output the type J thermocouple voltages shown in Table 12 and
verify the UUT temperature readings are within the limits shown (values use the ITS-
90 curves).
4. Press STBY on the 5520A.
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Figure 10. Lower Display Thermocouple Test Connections
Table 12. Type J Thermocouple Readings
5520A Settings (referenced to 0 °C) UUT Readings
-180.0 °C (-7.403 mV) -179.0 °C to -181.0 °C
0.0 °C (0.000 mV) -0.7 °C to +0.7 °C
750.0 °C (42.281 mV) 749.3 °C to 750.7 °C