Uut Thermocouple Calibration; Thermocouple Accuracy Test - Fluke 9190A Operator's Manual

UUT Thermocouple Calibration

Table 4-14 shows the order of the tests to be performed on the UUT thermocouple input.
# Test Name
1

Thermocouple Accuracy Test

2 Thermocouple Reference Junction
Accuracy Test
3 Thermocouple Reference Junction
Alignment
4 Thermocouple Accuracy Alignment
5 Thermocouple Reference Junction
Accuracy Test
6

Thermocouple Accuracy Test

Thermocouple Accuracy Test
The Thermocouple Accuracy Test is used to collect As Found, Alignment, and As Left
data.
Perform the Thermocouple Accuracy Test as follows:
1. Connect the voltage source.
2. Turn on the TC reference in the UUT.
3. Set the instrument conversion type for the UUT thermocouple input to mV.
4. Turn on and set the voltage source to -10 mV.
5. Let the readout stabilize for a minimum of 20 seconds.
6. Take a minimum of 40 samples at a 2-second interval.
7. Turn on and set the voltage source to 0 mV.
8. Let the readout stabilize for a minimum of 20 seconds.
9. Take a minimum of 40 samples at a 2-second interval.
10. Turn on and set the voltage source to 50 mV.
11. Let the readout stabilize for a minimum of 20 seconds.
12. Take a minimum of 40 samples at a 2-second interval.
13. Turn on and set the voltage source to 100 mV.
14. Let the readout stabilize for a minimum of 20 seconds.
15. Take a minimum of 40 samples at a 2-second interval.
16. Calculate the average of the measurements taken.
17. Record the data as appropriate for the type of calibration or step in the process.
Table 4-14. Thermocouple Input Testing Process
Nominal(s) mV
−10, 0, 50, 100
25 °C
-
-
25°C
−10, 0, 50, 100
9190A Input Panel Calibration
Notes
As Found/Alignment data
As Found/Alignment data
Calculate reference junction offset with
Alignment data
Calculate offsets with Alignment data
As Left data
As Left data
4
Calibration
4-21