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5700A/5720A Series II Calibrator
Service Manual
3-54
Table 3-18. DC Voltage Test Record for 5720A
Divider
Setting
5720A
Range
5720A
Output
(1)
Null Detector
Reading(µV)
(2)
Null Det Limit
(µV)
Meter Limit
Rattle (µV)
0.1V 0.22V 0.1V ±1.20 (2) NA
1V 2.2V 1V ±4.8 µV (2) 0.55
1V 11V 1V (3) ±6 (2) 2.2
10V 11V 10V (4) ±33 3.5
10V 22V 10V (3) ±35 5.5
100V 220V 100V ±45 7.5
1000V 1100V 1000V ±65 4.5
0.1V 0.22V -0.1V ±1.20 (2) NA
1V 2.2V -1V ±4.8 (2) 0.55
10V 11V -10V ±6.0 (2) 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
µ
V.