52120A
Users Manual
5-8
10. Set the DMM ‘-c’ and ‘÷z’ stores to 0.8.
11. Turn on the ‘*m’, ‘-c’ and ‘÷z’, and % math functions on the DMM.
12. Set the 5720A output to the values in Table 5-3 for the +2 and -2 volt verification
points.
13. Set the DMM ‘-c’ and ‘÷z’ stores to -0.8 for the -2 volt measurement. Let each
measurement become stable for a minimum of one minute and then record the
measured error.
14. Set the 5720A output to the values in Table 5-3 for all the ac voltage verification
points and record the measured error. Use the transfer method for all ac
measurements.
For each ac measurement in Table 5-3:
• Set the 5720A output voltage and frequency to the reference level shown in
Table 5-3.
• Let the measurement become stable for a minimum of one minute and then
record the measured error in Table 5-3.
• 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 5-3.
Table 5-3. 2 Amp Range Verification
5720A
Output
8508A
ACV
filter
8508A
Input
A40B
Measured
Error (%)
Product
Specification
(99 %)
Measurement
uncertainty
(99 %)
TUR
1 V dc - Front 2 A ±0.0200 % ±0.0036 % 5.6:1
-1 V dc - Front 2 A ±0.0200 % ±0.0036 % 5.6:1
2 V dc - Front 2 A ±0.0150 % ±0.0030 % 5.0:1
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