Resistance Checks - Fluke 8508A Service Manual

Table 3-9. AC Voltage Verification Points and Sequence (cont)
8508A Range Voltage
200V
1000 V
1000 V
1000 V
[1] Based on 365 day Tcal 1 C 99 %CL Absolute specifications. See comments in Applicable Verification Tolerance section above
regarding the impact of calibration uncertainties and use of other specifications.

Resistance Checks

When verifying the resistance function, each of the resistance modes (Normal , Tru ,
LoI and HiV ) must be individually checked. The following procedure assumes use of
a multifunction calibrator and verifies each resistance mode in turn, range by range. If
individual standard resistors are used it may be more convenient to check all the modes in
turn for each resistance value to avoid connecting the same resistance standard several
times during the calibration sequence. A 1 G standard resistor is used for ranges above
200 M as the highest resistance available from the 5720A calibrator is 100 M .
Equipment Configuration
1. Ensure that the calibrator output is set to
Guard (
EXT GRD
2. Connect the equipment as described for Routine Calibration.
3. Press the
4. Press the
CONFIG
5. Confirm that the Multimeter is configured for internal guard (External Guard is
deselected) by checking that the
display.
Frequency
100 V 20 Hz
100 V 55 Hz
100 V 1 kHz
100 V 3 kHz
100 V 10 kHz
100 V 30 kHz
100 V 60 kHz
100 V 100 kHz
500 V 55 Hz
500 V 1 kHz
500 V 3 kHz
500 V 10 kHz
500 V 30 kHz
1 kHz
30 kHz
is deselected).
key
key. Select ,
Filt RESL7
Ext Grd
Calibration and Verification
8508A Filter
10 Hz
40 Hz
100 Hz
100 Hz
100 Hz
100 Hz
100 Hz
100 Hz
40 Hz
100 Hz
100 Hz
100 Hz
100 Hz
100 Hz
100 Hz
and configured for Internal
STANDBY
, and .
4W
legend does not appear on the left-hand
Performance Verification
[1]
Tolerance
0.0144 V
0.0119 V
0.0099 V
0.0119 V
0.0119 V
0.0295 V
0.0795 V
0.0795 V
0.088 V
0.088 V
0.088 V
0.088 V
0.223 V
0.331 V
1.476 V
3
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