Ac Voltage Amplitude Verification; Verification At 1 M - Fluke 5820A Service Manual

3-28. AC Voltage Amplitude Verification

This procedure uses the following equipment:
Hewlett-Packard 3458A Digital Multimeter
BNC(f) to Double Banana adapter
50 feedthrough termination
N to BNC cable supplied with the Scope Calibrator
N to BNC cable to connect the Calibrator Mainframe TRIG OUT to the HP 3458A
Ext Trig
Set the Calibrator Mainframe to the Volt menu. Follow these steps to verify the ac
voltage function.

3-29. Verification at 1 M

For the 1 M verification, connect the Calibrator Mainframe's CHAN 1 connector to the
HP 3458A input, using the cable supplied with the Calibrator Mainframe and the BNC(f)
to Double Banana adapter. Connect the Calibrator Mainframe TRIG OUT connector to
the HP 3458A Ext Trig connector located on the rear of that instrument.
Make sure the Calibrator Mainframe impedance is set to 1 M . (The blue softkey under
Output @ toggles the impedance between 50
1. When making measurements at 1 kHz, set the HP 3458A to DCV, NPLC = .01,
TRIG EXT, and the DELAY to .0007 for measuring the topline of the wave form,
and the DELAY to .0012 for measuring the baseline of the wave form. Manually
lock the HP 3458A to the range that gives the most resolution for the topline
measurements. Use this same range for the corresponding baseline measurements at
each step.
2. Enable the Calibrator Mainframe external trigger by toggling the blue softkey under
TRIG to /1.
3. Measure the topline first, as indicated in Table 3-7. For each measurement, take
samples for at least two seconds, using the HP 3458A MATH functions to determine
the average or mean value.
4. Measure the baseline of each output after the corresponding topline measurement, as
indicated in Table 3-7. The peak-to-peak value is the difference between the topline
and baseline measurements. Compare the result to the tolerance column.
5. When making measurements at the other frequencies, set up the HP 3458A (NPLC
and topline and baseline DELAY) per Table 3-2.
Calibration and Verification
and 1 M .)
3
Verification
3-23