Fluke 52120A-C User Manual page 80

52120A
Users Manual
17. Set the DMM '-c' and '÷z' stores to -0.8 for the -2 volt measurement.
18. Record the measured errors.
19. Set the 5720A output to the values in Table 5-4 for all the ac voltage verification
1 V dc
-1 V dc
2 V dc
-2 V dc
0.56 V, 10 Hz
1.4 V, 10 Hz
0.8 V, 57 Hz
2 V, 57 Hz
5-10
verification points.
points and record the measured error. Use the transfer method for all ac
measurements.
For each ac measurement in Table 5-4:
•
Set the 5720A output voltage and frequency to the reference level shown in
Table 5-4.
•
Push M on the Product.
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.
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 5-4.
Table 5-4. 20 Amp Range Verification Points
8508A
5720A 8508A
ACV
Output Input
filter
- Front
- Front
- Front
- Front
10 Rear
10 Front
40 Rear
40 Front
Note
Note
Product
Measured
A40B Specification
Error (%)
±0.0200 %
20 A
±0.0200 %
20 A
±0.0150 %
20 A
±0.0150 %
20 A
20 A -
±0.1007 %
20 A
20 A -
±0.0750 %
20 A
Measurement
uncertainty
(99 %) (99 %)
±0.0069 %
±0.0069 %
±0.0036 %
±0.0036 %
Reference level
±0.0076 %
Reference level
±0.0057 %
TUR
2.9:1
2.9:1
4.1:1
4.1:1
13:1
13:1