Calibration Procedures 1
Using the Front Panel for Adjustments
U1231A/U1232A/U1233A Service Guide 25
1 Connect a dual banana plug to the output voltage
terminals of the calibrator.
2 Hold the multimeter so that the top of the multimeter is
vertically and horizontally centered and in contact with
the banana plug’s Hi terminal.
Figure 1-10 Vsense functional test
3 Adjustment or repair is required if the multimeter fails
any of the Vsense functional test.
Do not touch the dual banana plug with your hand while the calibrator
output is turned on.
Step Test function Range 5520A input Vsense alert status
1
Vsense Turn the rotary
switch to the position.
Press and hold for more
than 1 second.
Hi.SE
Output off No alert
10 V, 55 Hz Alert on
Lo.SE
5 V, 55 Hz No alert
15 V, 55 Hz Alert on
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