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Calibration and Verification
Optional Tests
3
3-45
3-35. DC Voltage Output Noise
(
0
.
1 to 10 Hz
)
Test
Proceed as follows to test for dc voltage output noise in the range 0.1 to 10 Hz:
1. Place the 8520A DMM into Math Program 8 with the Display Option Register set to
register 8.3 (Standard Deviation Computed Variable)as follows:
a. Press SHIFT, 8, and PROGRAM SELECTION. Then press SHIFT, 0, ., 1,
PROGRAM SELECTION, 8, ., 3, PROGRAM DATA.
b. Set the DMM to 200 mV DC Range, 20 Samples/Second, and 1000 ms Filter.
c. Set PROGRAMS IN USE to the ON position.
2. Lock the Calibrator in the 22V range and set it to 100 mV dc. Place the Calibrator in
operate.
3. Connect the DMM to the Calibrator OUTPUT binding posts and press the DMM
reset button once. Verify that after 10 seconds the DMM reads less than 0.0010E-3.
4. Lock the Calibrator in the 220V range and set it to 100 mV dc. Place the Calibrator
in operate.
5. Press the DMM reset button once. Verify that after 10 seconds the DMM reads less
than 0.0100E-3.
6. Set the Calibrator to standby.
3-36. AC Voltage Distortion Test
Equipment required for these tests is listed in Table 3-14. Proceed as follows to test for
distortion in the ac voltage function. Use Table 3-37 for test record.
Table 3-14. Equipment Required for Distortion Test
Equipment Model
DMM Wavetek 1281 or HP 3458A
Distortion Analyzer Krohn-Hite 6900B
Spectrum Analyzer (only for 5700A-03) HP 8590A
Non-wirewound load resistors Any (see *Table 3-50 for values)
1. Connect the Calibrator output terminals to the distortion analyzer.
2. Measure the Calibrator distortion at the output voltages and frequencies tabulated in
Table 3-37. Verify that the distortion measured is within the limits shown.
WWarning
A non-reactive voltage divider may be necessary to scale the
test voltages to match the distortion analyzer characteristics.
3-37. Wideband Distortion Testing
Proceed as follows to test for distortion in the wideband output function (for units with
the Option 5700A-03 Wideband AC Module only).
1. Connect the Wideband output terminated in 50Ω to the spectrum analyzer input.