Calibrate A Fluke 51 Thermometer; Verification Procedure - Fluke 5560A Operator's Manual

5560A/5550A/5540A
Operators Manual

Calibrate a Fluke 51 Thermometer

The Fluke 51 Thermometer measures temperature using a type J or K thermocouple. The Calibrator
simulates both thermocouples, simplifying testing and calibration. This section demonstrates how the
Calibrator is used to calibrate this thermometer.
These procedures are included here as an example. The Model 51 Service Manual contains
the authoritative testing and calibration procedures.

Verification Procedure

Conduct this test only after the thermometer has had time to stabilize to an ambient temperature of
23 °C ±5 °C (73 °F ±9 °F).
1. Connect the Fluke 51 Thermometer to the Calibrator using the appropriate connection cable
(Figure 14). The connection cable and miniconnector material must match the thermocouple type.
For example, if testing a K thermocouple, the cable and miniconnector are for a type K
thermocouple.
Figure 14. Cable Connections for Testing a 50 Series Thermometer
For Figure 14, connection wiring must match the thermocouple type (for example, K, J).
2. Go to the TC Source function and push 0, I, and E.
3. Tap the Thermocouple Type button to select the thermocouple type. Ensure that the Reference
Junction softkey selection indicates Internal. If not, tap the Reference Junction softkey.
4. Enter the Calibrator settings listed in Table
60
Note
17 and verify that performance is within specification.