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Calibration and Verification
Determining Test Limits for Other Calibration Intervals
3
3-55
Table 3-19. DC Voltage Test Record for 5700A
Divider
Setting
5700A
Range
5700A
Output
(1)
Null Detector
Reading(µV)
(2)
Null Det Limit
(µV)
Meter Limit
Rattle (µV)
0.1V 0.22V 0.1V ±1.45 (2) NA
1V 2.2V 1V ±7.2 (2) 0.55
1V 11V 1V (3) ±9 (2) 2.2
10V 11V 10V (4) ±54 3.5
10V 22V 10V (3) ±58 5.5
100V 220V 100V ±70 7.5
1000V 1100V 1000V ±86 4.5
0.1V 0.22V -0.1V ±1.45 (2) NA
1V 2.2V -1V ±7.2 (2) 0.55
10V 11V -10V ±9.0 (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.