5500A
Operator Manual
7-26
7-30. AC Voltage Accuracy with a DC Offset
Note
This verification test is optional. It is not necessary to guarantee the full
calibration of the instrument. However, it may be useful when
troubleshooting an instrument when other functions and/or parameters are
incorrect.
The AC Voltage Accuracy with a DC Offset tests the accuracy of the ac output in the
presence of a dc offset. For this test, be sure to ac couple the input to the meter.
Nominal
ACV
Value (V)
Nominal DC
Value (V)
Frequency
(Hz)
Measured Value
(VAC)
Deviation
%
90-Day Spec.
(%)
3.3 mV 50 mV 1 kHz 0.716%
33 mV 500 mV 1 kHz 0.101%
330 mV 5 V 1 kHz 0.038%
3.3 V 45 V 1 kHz 0.048%
7-31. Non-Operator Fuse Replacement
In addition to the operator-replaceable line fuse (see “Replacing the Line Fuse”), there
are additional fuses mounted on printed circuit assemblies (PCAs) internal to the 5500A
Calibrator. The internal fuses are summarized in Table 7-3 and are not operator-
replaceable. For instructions on replacing a PCA fuse, refer to the 5500A Service
Manual (PN 105798).
Table 7-3. Non-Operator Fuse Replacement Locations
Fuse Description Printed Circuit
Assembly
Reference Quantity Part
Number
0.125 A, 250 V, Slow
Blow
A5, Synth Z Board A5F2, A5F3 2 832261
0.5 A, 250 V, Slow Blow A12, Filter Board A12F1, A12F2 2 831990
2 A, 250 V, Slow Blow A3, Mother Board A3F1 to A3F10 10 806331
W To ensure safety, use exact replacement only
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