Ac Current Checks - Fluke 8508A Service Manual

6. On the calibrator select the value required for verification in the negative polarity.
7. Note the Multimeter's reading. Compare the result with the allowable tolerance,
taking into account any known error from nominal of the calibrator for this output.
Table 3-11. DC Current Verification Points and Sequence
8508A Range
200 A
2 mA
20 mA
200 mA
2 A
20 A
[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.

AC Current Checks

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
ACI
4. Press the
CONFIG
5. Confirm that the Multimeter is configured for internal guard (External Guard is
deselected) by checking that the
display.
Current
0 A
Perform input zero operation to calibrator range locked zero output
+100 A
-100 A
0 mA
Perform input zero operation to calibrator range locked zero output
+1mA
-1mA
0 mA
Perform input zero operation to calibrator range locked zero output
+10mA
-10mA
0 mA
Perform input zero operation to calibrator range locked zero output
+100mA
-100mA
0 A
Perform input zero operation to calibrator range locked zero output
+1A
-1A
0 A
Perform input zero operation to calibrator range locked zero output
+10A
-10A
is deselected).
key
key. Select
RESL6
Ext Grd
Tolerance
0.00190 A
0.00190 A
0.0000190 mA
0.0000190 mA
0.000200 mA
0.000200 mA
0.00530 mA
0.00530 mA
0.0002260 A
0.0002260 A
0.004950 A
0.004950 A
and configured for Internal
STANDBY
and 100Hz Filter.
legend does not appear on the left-hand
Calibration and Verification
Performance Verification
[1]
3
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