Resistance Checks - Fluke 8508A User Manual

8508A
Users Manual
8508A Range
200V
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
2. Connect the equipment as described for Routine Calibration.
3. Press the
4. Press the
5. Confirm that the 8508A is configured for internal guard (External Guard is
6-36
Table 6-9. AC Voltage Verification Points and Sequence (cont)
Voltage
100 V
100 V
100 V
100 V
100 V
100 V
100 V
100 V
500 V
500 V
500 V
500 V
500 V
1000 V
1000 V
Guard ( is deselected).
EXT GRD
key
key. Select
CONFIG
deselected) by checking that the
display.
Frequency 8508A Filter
20 Hz 10 Hz
55 Hz 40 Hz
1 kHz 100 Hz
3 kHz 100 Hz
10 kHz 100 Hz
30 kHz 100 Hz
60 kHz 100 Hz
100 kHz 100 Hz
55 Hz 40 Hz
1 kHz 100 Hz
3 kHz 100 Hz
10 kHz 100 Hz
30 kHz 100 Hz
1 kHz 100 Hz
30 kHz 100 Hz
STANDBY
, , and
Filt RESL7 4W
legend does not appear on the left-hand
Ext Grd
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
and configured for Internal
.
1