Fluke 5700A/5720A Series II Calibrator, 18. DC Voltage Test Record for 5720A, Divider Setting

5700A/5720A Series II Calibrator

Service Manual

Table 3-18. DC Voltage Test Record for 5720A

Divider Setting

0.1V

1V

1V

10V

10V

100V

1000V

0.1V

1V

10V

5720A Range

0.22V

2.2V

11V

11V

22V

220V

1100V

0.22V

2.2V

11V

5720A Output

(1)

0.1V

1V

1V (3)

10V (4)

10V (3)

100V

1000V

-0.1V

-1V

-10V

Null Detector

Reading(μV)

(2)

Null Det Limit

(μV)

±1.20 (2)

±4.8 μV (2)

±6 (2)

±33

±35

±45

±65

±1.20 (2)

±4.8 (2)

±6.0 (2)

Meter Limit Rattle (μV)

NA

0.55

2.2

3.5

5.5

7.5

4.5

NA

0.55

2.2

1:Mathematically, the true 5700A/5720A Series II output programmed is the certified value of the reference standard divided by the reference standard nominal value, multiplied by the required 5700A/5720A Series II nominal output. In other words, the 5700A/5720A Series II output is always programmed for the nominal output adjusted up or down by the same percentage as the certified value of the reference standard.

2:On the 752A 0.1 and 1V ranges, the null detector polarity is reversed. A low input (5700A/5720A Series II output) causes a positive null detector reading.

3:Use Range Lock to obtain 1V on 11V and 10V on 22V range. Deactivate Range Lock before setting the next voltage output.

4:Line regulation can be verified at this time by adjusting the autotransformer for a ±10% change in line voltage. The null detector reading must remain constant within ±1 μV.

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