Fluke 5820A, Service Manual

Page: 66 / 158

5820A
Service Manual
3-28
Table 3-11. DC Current Verification
Calibrator Mainframe
output
HP 3458A Reading
(mA dc)
Tolerance (mA dc)
0.100 mA 0.000750
-0.100 mA 0.000750
0.550 mA 0.001875
-0.550 mA 0.001875
1.099 mA 0.003248
-1.099 mA 0.003248
1.100 mA 0.003250
-1.100 mA 0.003250
5.50 mA 0.014250
-5.50 mA 0.014250
10.99 mA 0.027975
-10.99 mA 0.027975
11.00 mA 0.028000
-11.00 mA 0.028000
50.00 mA 0.125500
-50.00 mA 0.125500
100.0 mA 0.250500
-100.0 mA 0.250500
3-35. AC Current Verification
The setup to measure the topline and baseline of ac current uses the HP 3458A triggered
by a change in input level (see Table 3-12 for HP3458A settings). The trigger level is set
to 1% of the DCV range, with ac coupling of the trigger signal. Connect the precision
resistor assemblies, as indicated, to the banana jacks on the front panel. Connect the
DMM to the precision resistor. Set the HP 3458A to DCV, Auto Range, NPLC = 10,
FIXEDZ = on. Use the same delays and settings used in the section “AC Current
Calibration”. Record the HP3458A readings in Table 3-13.
Table 3-12. AC Measurement HP3458A Settings
HP 3458A Settings
Input Frequency NPLC DELAY (topline) DELAY (baseline)
45 Hz .01 .0002 s .012
500 Hz .01 .0002 s .0012 s
1 kHz .01 .0002 s .0005 s