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753/754 Calibration Manual 24 5522A CALIBRATOR Fl u ke 75X Room Temperat u re La b Bath Fluke 1551A Ex Thermometer Fluke 5522A TYPE-K Thermocouple Wire Cu Cu gso12.eps Figure 10. Temperature Me asure (TC) Verification Co…

Documenting Process Calibrator

Performance Verification Tests

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.

753/754

Calibration Manual

5522A

CALIBRATOR

Fluke 75X

Room Temperature

Lab Bath

Fluke 1551A Ex

Thermometer

Fluke 5522A

TYPE-K

Thermocouple

Wire

CuCu

gso12.eps

Figure 10. Temperature Measure (TC) Verification Connections

Documenting Process Calibrator

Performance Verification Tests

Table 13. Temperature Measure Verification

Input dcmV (referenced to 0 °C)

Minimum

1-Year °C

Maximum

1-Year °C

Minimum

2-Year °C

Maximum

2-Year °C

-5.550 mV (-180 °C) -180.9 -179.1 -181.2 -178.8

0.000 mV (0 °C) -0.5 0.5 -0.6 0.6

52.410 mV (1300 °C) 1299.1 1300.9 1298.8 1301.2

Lag Bath Reference Table, Type K, ITS-90

Tem

. °C 18 19 20 21 22 23 24 25 26 27 28

mV 0.718 0.758 0.798 0.838 0.879 0.919 0.960 1.000 1.041 1.081 1.122

Thermocouple Source

To verify the thermocouple source function:

Note

This test uses a Type-K thermocouple setting on the UUT.

1. Use Type-K thermocouple wire and copper wire to connect the 8508A to the

UUT -TC jack as shown in Figure 10 (the 8508A is used in place of the 5522A).

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 % accuracy) to measure the temperature of the lag bath.

2. Set the UUT to the thermocouple source function, linear mode, TC type K, ITS-

90 scale, internal reference, and °C.

3. Set the 8508A to measure mV dc.

4. 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.

5. Source each of the temperatures in Table 14 from the UUT. At each point,

correct the DMM measured voltage. To do this, add the millivolt equivalent of

the Type-K junction at the lag bath temperature (use the Type-K ITS-90 chart).

6. Continue through the test points. See if the value shown on the UUT is in the

range shown in the applicable column in Table 14.

7. When you complete the test, push  on the UUT two times to turn the source

function off. This conserves battery life.