Fluke 8508A, Service Manual, Page: 74 / 120

8508A
Service Manual
3-34
5. 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.
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.
8. Set the calibrator output to
STANDBY
.
Table 3-8. DC Voltage Verification Points and Sequence
8508A Range Voltage Tolerance
[1]
0 mV
Perform input zero operation to calibrator range locked zero output
+100 mV
±
0.00072 mV
200 mV
-100 mV
±
0.00072 mV
0 V
Perform input zero operation to calibrator range locked zero output
+1 V
±
0.0000045 V
2 V
-1 V
±
0.0000045 V
0 V
Perform input zero operation to calibrator range locked zero output
+1 V
±
0.000009 V
+10 V
±
0.000045 V
+19 V
±
0.000081 V
-1 V
±
0.000009 V
-10 V
±
0.000045 V
20 V
-19 V
±
0.000081 V
0 V
Perform input zero operation to calibrator range locked zero output
+100 V
±
0.00065 V
200 V
-100 V
±
0.00065 V
0 V
Perform input zero operation to calibrator range locked zero output
+1000 V
±
0.0066 V
1000 V
-1000 V
±
0.0066 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.