Fluke 5700A Series II Service Manual page 122

5700A/5720A Series II Calibrator
Service Manual
Divider
Setting
0.1V
1V
1V
10V
10V
100V
1000V
0.1V
1V
10V
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 V.
3-52
Table 3-18. DC Voltage Test Record for 5720A
5720A
5720A
Output
Range
(1)
0.22V 0.1V
2.2V 1V
11V 1V (3)
11V 10V (4)
22V 10V (3)
220V 100V
1100V 1000V
0.22V -0.1V
2.2V -1V
11V -10V
Null Detector
Null Det Limit
Reading( V)
(2)
1.20 (2)
4.8 V (2)
6 (2)
33
35
45
65
1.20 (2)
4.8 (2)
6.0 (2)
Meter Limit
( V) Rattle ( V)
NA
0.55
2.2
3.5
5.5
7.5
4.5
NA
0.55
2.2