Fluke 5500A, Service Manual

Page: 213 / 296

SC300 Option
Verification
6
6-87
6-115. AC Voltage Amplitude Verification
This procedure uses the following equipment:
•
Hewlett-Packard 3458A Digital Multimeter
•
BNC(f) to Double Banana adapter
•
50
Ω
feedthrough termination (as required)
•
BNC cable supplied with the SC300
For ac voltage amplitude verification, refer to Figure 6-19 for the proper setup
connections.
Set the Calibrator Mainframe to SCOPE mode, with the Volt menu on the display. Then
proceed with the next sections to verify the AC Voltage function.
6-116. Verification at 1 M
Ω
For the 1 M
Ω
verification, connect the Calibrator Mainframe’s SCOPE 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
Ω
. (The blue softkey under
Output Z toggles the impedance between 50
Ω
and 1 M
Ω
.)
1. When making measurements at 1 kHz, set the HP 3458A to the values shown in
Table 6-48. 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. Measure the topline first. For each measurement, take samples for at least two
seconds, using the HP 3458A MATH functions to determine the average or mean
value. See “Setup Square Wave Measurements” earlier in this section for more
details.
3. Measure the baseline of each output after the corresponding topline measurement.
The peak-to-peak value is the difference between the topline and baseline
measurements. Compare the result to the tolerance (1-year spec.) column.
4. When making measurements at the other frequencies, set up the HP 3458A (NPLC
and topline and baseline DELAY) per Table 6-48.