Fluke 515A - 4.6 AC VOLTAGE TEST

4.5.2 Set the TI AC output control(s) to obtain an output of 10V at 400 Hz and set the thermal transfer standard
(TTS) range switch to 10V.
4.5.3 Set the TTS mode switch to the ac transfer position. Establish a galvanometer null at its most sensitive
range while maintaining an on–scale meter indication by adjusting the applicable reference–adjust control(s) when
switching to a more sensitive range. Adjust galv zero control for electrical zero as required.
4.5.4 Set the TTS galv switch to open and the sensitivity switch to low.
NOTE
Allow for stabilization time. The Fluke 540B may initially take as long as 10 minutes; however,
it is considered stabilized when the galvanometer indication drifts less than 2 small divisions per
minute in its most sensitive position. Readjust the reference–adjust controls to reestablish the
galvanometer null.
4.5.5 Set the TTS mode switch to dc transfer.
4.5.6 Vary the dc voltage standard output control(s) as required to reestablish the galvanometer null indication.
(Do not adjust the TTS reference control(s) while in dc mode.)
4.5.7 Obtain a null indication successively in the medium” and high” positions of the TTS sensitivity switch
by adjusting the dc voltage standard output control(s).
4.5.8 Allow 15 to 30 seconds for the galvanometer to stabilize. Verify that the dc voltage standard output
indication is within 9.996 to 10.004 volts.
4.5.9 Repeat steps 4.5.3 through 4.5.8 at each of the following TI output settings. At each setting, verify that the
dc voltage standard output indication is within the tolerance limits shown.
TI Output Setting Tolerance Limits
Range Freq (DC Volts)
10V 4 kHz 9.996 to 10.004
10V 50 kHz 9.990 to 10.010
4.5.10 Set the equipment control(s) for minimum voltage output, and disconnect the test configuration.
4.6 AC VOLTAGE TEST
4.6.1 Connect the AV source to the differential voltmeter as shown by the solid line in Figure 6.
NAVAIR 17–20AQ–70
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