RTD/Thermocouple Calibrator
712B Performance Verification
712B Performance Verification
Verify that the 712B performance is within the 1 or 2 year specifications as
desired.
Turn the 712B on and let it warm up for 5 minutes.
Verify Ohms Source
1. Make connections between the 712B and the 8508A, as shown in Figure 2.
Fluke 712B
Fluke 8508A
hwp011.eps
Figure 2. Verify 712B Ohms Source
2. Set the 8508A to 4-wire ohms measurement mode. Set the resolution of
Ohms measurement mode to 7 1/2-digits or above. Set the range of Ohms
measurement mode as shown in Table 4.
3. Set the 712B to Ohms Source mode.
a. Push .
b. Push until Ohms is highlighted.
c. Push again.
d. Push as necessary to enter Source mode.
4. Set the 712B to output the resistance values at the first column in Table 4.
5. Wait approximately 10 seconds until the 8508A shows a stable reading, and
verify that the 8508A readings are within the appropriate limits in Table 4.
Note
The 8508A must be set to 4-Wire measurement and in the requested
range to maintain currents that are within 712B’s limits.
6. Disconnect the 712B from the 8508A.
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