Service manual

8508A
Service Manual
3-42
Procedure
Repeat the following sequence for each range, starting with the 200μA range and
working up to the 20A range, as listed in Table 3-12.
1. Select the required Multimeter range.
2. On the calibrator set the output to the current and frequency for the point being
verified as listed in Table 3-12. Set the output to
OPERATE.
3. 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.
4. Repeat steps 2 – 4 for each point to be verified on the Multimeter’s range to be
verified.
5. Repeat steps 1 – 5 for each Multimeter range to be verified.
6. Set the calibrator output to
STANDBY.
Table 3-12. AC Current Verification Points and Sequence
8508A Range Current Frequency Tolerance
[1]
100 μA
300 Hz
± 0.0830 μA
100 μA
1 kHz
± 0.0830 μA
100 μA
3 kHz
± 0.0830 μA
100 μA
5 kHz
± 0.0830 μA
200 μA
100 μA
10 kHz
± 0.0830 μA
1 mA 300 Hz
± 0.000580 mA
1 mA 1 kHz
± 0.000580 mA
1 mA 3 kHz
± 0.000580 mA
1 mA 5 kHz
± 0.000580 mA
2 mA
1 mA 10 kHz
± 0.000580 mA
10 mA 300 Hz
± 0.00580 mA
10 mA 1 kHz
± 0.00580 mA
10 mA 3 kHz
± 0.00580 mA
10 mA 5 kHz
± 0.00580 mA
20 mA
10 mA 10 kHz
± 0.00580 mA
100 mA 300 Hz
± 0.0545 mA
100 mA 1 kHz
± 0.0545 mA
100 mA 3 kHz
± 0.0545 mA
100 mA 5 kHz
± 0.0545 mA
200 mA
100 mA 10 kHz
± 0.0545 mA
1 A 300 Hz
± 0.000945 A
1 A 1 kHz
± 0.000945 A
1 A 3 kHz
± 0.001055 A
1 A 5 kHz
± 0.001055 A
2 A
1 A 10 kHz
± 0.001055 A
10 A 300 Hz
± 0.01140 A
10 A 1 kHz
± 0.01140 A
10 A 3 kHz
± 0.02740 A
10 A 5 kHz
± 0.02740 A
20 A
10 A 10 kHz
± 0.02740 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.
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