Calibration And Offset Adjustment; A/D Calibration - Fluke 51 Service Manual

Calibration and Offset Adjustment

Calibration consists of two parts:
1. Calibration of the A/D converter, using the set up shown in Figure 3.
2. Reference junction calibration, using the ice bath test set up shown in Figure 2.

A/D Calibration

To calibrate the A/D portion of the thermometer, follow these steps:
1. Connect the calibrator to the T1 input of the thermometer using copper (non-
thermocouple) wire and a copper thermocouple connector. Refer to Figure 3 for
proper equipment connections.
2. Turn the thermometer on, with a small, blunt probe, press the calibration button
located on the back and in the center of the thermometer. Refer to Figure 4.
5700A
Calibrator
+
-
Copper
wire
Figure 3. Calibration Connections
Thermometer
Calibration and Offset Adjustment
Copper
Thermocouple
connector
- +
51, 52, 53, or 54
Series II
Thermometer
zb06f.eps
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