Thermocouple Measurement Accuracy; Thermocouple Sourcing Accuracy; Thermocouple Measuring Accuracy - Fluke 5500A Operator's Manual

7-16. Thermocouple Measurement Accuracy

The Thermocouple Measurement Accuracy test checks the internal temperature
reference. To perform this test, measure a lag bath temperature within + 5 C of the
5500A. Set the 5500A to Internal Reference, J thermocouple type. (See "Setting
Temperature Simulation (Thermocouple)" in Chapter 4.) Make connections with J-type
thermocouple wire.
Nominal Value ( C)
Lag bath temp.

7-17. Thermocouple Sourcing Accuracy

The Thermocouple Sourcing Accuracy test checks the accuracy of the thermocouple
sourcing circuitry. For this test, measure the dc output at the 5500A front panel TC
connector with a dc meter (observe polarity on the TC connector). Select External
Reference, and the linear output 10 V/ C as the thermocouple "type." (See "Setting
Temperature Simulation (Thermocouple)" in Chapter 4.)
Nominal Value ( C)
0 C
100 C
-100 C
1000 C
-1000 C
10000 C
-10000 C

7-18. Thermocouple Measuring Accuracy

The Thermocouple Measuring Accuracy tests the accuracy of the thermocouple
measuring circuitry. For this test, input a dc voltage into the 5500A front panel TC
terminals using copper plugs and wire (observe polarity on the TC connector), select
External Reference, and the linear output 10 V/ C as the thermocouple "type." (See
"Setting Temperature Simulation (Thermocouple)" in Chapter 4.)
(Optional: You can also source a known temperature using a J-type thermocouple
connection and Internal Reference. Source 0 C, 100 C, 1000 C, and -200 C.)
Input Value Nominal Reading
(V)
0 V 0.00 C
100 mV 10,000.00 C
-100 mV -10,000.00 C
5500A Reads ( C)
Equivalent Value Measured Value
(mV)
0.000 mV
1.000 mV
-1.000 mV
10.000 mV
-10.000 mV
100.000 mV
-100.000 mV
Actual Reading
( C) (mV)
Performing a Calibration Check
Deviation C
Deviation
(mV) %
Deviation %
Maintenance
90-Day Spec. ( C)
0.1
90-Day Spec.
(mV or %)
0.003 mV
0.305%
0.305%
0.035%
0.035%
0.008%
0.008%
90-Day Spec.
(mV or %)
0.003 mV
0.008%
0.008%
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