Thermocouple Measure - Fluke 753 Calibration Manual

Thermocouple Measure

To verify the thermocouple measure function.
1. Use Type-K thermocouple wire and copper wire to connect the 5522A output to
the UUT-TC jack as shown in Figure 10. The Type K-to-Copper junctions must
be welded or made with tight screw terminals and submersed in the lag bath
(room temperature). Use the standard thermometer (0.1 °C accuracy) to measure
the temperature of the lag bath.
2. Set the 5522A to source dc millivolts and the UUT to the thermocouple measure
function, TC Type K; ITS-90 scale, internal reference, and °C.
3. Stop for a minimum of 1 minute for thermal "emfs" (caused by insertion of the
connectors) to dissipate, and let the lag bath become stable for a minimum of
15 minutes.
4. Use the 5522A to source the millivolt equivalents of the temperatures in
Table 13. At each point, correct the 5522A output voltage. To do this, subtract
the millivolt equivalent of the temperature at the lag bath junction (use reference
chart below).
5. Continue through the test points. See if the value shown on the UUT is in the
range shown in the applicable column of Table 13.
6. When you complete the test, set the 5522A to STANDBY.
Documenting Process Calibrator
Performance Verification Tests
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