Ohms Function Performance Verification - Fluke 27 Service Manual

27
Service Manual
6. Verify that the UUT indicates between 196.8 and 203.2 mA.
7. Program the DMM Calibrator output for zero amps.
8. Switch the UUT to the ac µO function (µO), then program the DMM Calibrator
9. Verify that the UUT indicates between 1968 and 2032 µA.
10. Program the DMM Calibrator to standby.
11. Connect the DMM Calibrator output to the UUT amp (A) and common (COM) input
12. Switch the UUT to the AC mA/A function, then program the DMM Calibrator
13. Verify that the UUT indicates between 4.91 and 5.09 A. Program the DMM
14. Set the UUT to the dc mN/A function(mN/A).
15. Program the DMM Calibrator output for an output of 5.0 A dc.
16. Verify that the UUT indicates between 4.94 and 5.06 A.
17. Program the DMM Calibrator to standby.
18. Turn the function switch on the UUT to the dc mN/A position (mN/A).
19. Connect the DMM Calibrator output to the UUT mA/µA input terminal, then
20. Verify that the UUT indicates between 26.78 and 27.22 mA.
21. Program the DMM Calibrator output for 2700 µN dc. Set the UUT to the dc µN
22. Program the DMM Calibrator for 2.7 mA.
23. Verify that the UUT indicates between 2678 and 2722 µA.

3-16. Ohms Function Performance Verification

The following test may be used to verify correct ohms function operation and to verify
UUT accuracy in the various ohms ranges.
1. Connect the DMM Calibrator to the UUT using the volts/ohms/diode-test input
2. Turn the function switch to the J position.
3. Switch on power to the DMM Calibrator. Program the DMM Calibrator to the
3-14
output for 2000 µO at 500 Hz.
terminals.
output for 5 A at 1 kHz.
Calibrator to standby.
program the DMM Calibrator for an output of 27 mA dc.
function (µN).
terminal and common.
resistance values indicated in Table 3-2, and verify that the UUT indication is within
the tolerances given for each input value.