Keithley 2182, Service Manual, Page: 23 / 120

5. Verify temperature measurement accuracy for each of the temperature settings listed in
Table 1-4 . For each measurement:
• Set the Model 2182 for the appropriate thermocouple type.
• Set the temperature calibrator to the correct thermocouple type and temperature
setting.
• Verify that the Model 2182 temperature reading is within the limits given in the
table.
Analog output accuracy
Use the following procedure to verify accuracy of the analog output.
NOTE Be sure that DC voltage measurement accuracy is within required limits before
attempting this procedure.
1. With the power off, connect the Model 2182 CHANNEL 1 input jack to the DC voltage
calibrator, and connect the rear panel ANALOG output jack to the digital multimeter, as
shown in
Figure 1-4 .
Table 1-4
Temperature measurement accuracy limits
Thermocouple
type Temperature calibrator
setting (°C) Model 2182 temperature reading limits
(1 Year, 18°C-28°C)
J, K, N, T
J, K, N, T
J, K, N, T
J, K, N
K, N
E
E
E
R, S
R, S, B
R, S, B
-200
0
400
700
1300
-200
0
1000
0
400
1700
-200.2 to –199.8°C
-0.2 to 0.2°C
399.8 to 400.2°C
699.8 to 700.2°C
1299.8 to 1300.2°C
-200.2 to -199.8°C
-0.2 to 0.2°C
999.8 to 1000.2°C
-0.2 to 0.2°C
399.8 to 400.2°C
1699.8 to 1700.2°C
1-10 Performance Verification