52120A
Users Manual
5-12
• Set the 5720A output voltage and frequency to the reference level shown in
Table 5-5.
• Push M on the Product.
Note
For currents larger than 50 % of Product range, let the shunt become
stable for a minimum of five minutes.
• Set the DMM to rear input.
• Turn off the ‘*m’, ‘-c’ and ‘÷z’, and % math functions on the DMM.
• Let the measurement become stable for a minimum of one minute. Longer when
the 10 Hz and 40 Hz filter is on.
• Use Last Reading and Enter to store the last measurement in the ‘÷z’ and ‘-c’
stores of the DMM.
• Turn on the ‘-c’ and ‘÷z’ math functions on the DMM.
Note
The DMM measurement must be 0.000000 V plus a few digits of noise.
• Turn on the ‘*m’ and ‘%’ math functions to apply the correction factor and show
the measurement in percent.
• Set the 5720A to the values in the row below the reference level row.
• Set the DMM to front input.
• Let the measurement become stable and then write in the measured error in
Table 5-5.
Table 5-5. 120 Amp Range Verification Points
5720A
Output
8508A
ACV
filter
8508A
Input
A40B
Measured
Error (%)
Product
Specification
(99 %)
Measurement
uncertainty
(99 %)
TUR
0.6 V dc - Front 100 A ±0.0200 % ±0.0082 % 2.4:1
-0.6 V dc - Front 100 A ±0.0200 % ±0.0082 % 2.4:1
1 V dc - Front 100 A ±0.0160 % ±0.0047 % 3.4:1
-1 V dc - Front 100 A ±0.0160 % ±0.0047 % 3.4:1
0.56 V, 10 Hz 10 Rear 100 A - Reference level
0.7 V, 10 Hz 10 Front 100 A ±0.0493 % ±0.120 % 4.1:1
0.8 V, 57 Hz 40 Rear 100 A - Reference level
1 V, 57 Hz 40 Front 100 A ±0.0390 % ±0.0085 % 4.6:1
0.8 V, 300 Hz 100 Rear 100 A - Reference level
1 V, 300 Hz 100 Front 100 A ±0.0660 % ±0.0085 % 7.8:1
0.8 V, 1 kHz 100 Rear 100 A - Reference level
1 V, 1 kHz 100 Front 100 A ±0.2200 % ±0.0085 % >25:1
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