Performance Verification Tests
4
Keysight 3458A Calibration Manual
61
– DCV
– NDlG 8
– NPLC 100
– Trig SGL
DC voltage function offset test
The following procedure tests the offset voltage specification with the input
terminals shorted. A low-thermal short must be used to minimize thermally
induced errors. Also, you must allow five minutes before making the first
measurement to allow for thermal stabilization of the range relays.
1
Connect a low thermal short across the front panel HI and LO input terminals
of the DMM under test (see Figure 3-1 on page 39).
2
Set the range of the 3458A under test as specified in
3
Let the instrument sit for five minutes before taking the first reading to allow
the range relay and short to thermally stabilize. NOTE: The thermal
stabilization achieved for the 100 mV range is present for the 1V and 10V
ranges since these ranges use the same relays. The range relays are opened
for the 100V and 1000V ranges and therefore, have no thermal impact on the
measurement.
4
Execute Trig and record the offset reading (absolute value) for each range
listed in
Test Card provided at the
end of this chapter.
Table 4-1
Offset performance tests
Offset test number
DMM range
1
100 mV
2
1 V
3
10 V
4
100 V
5
1000 V
Содержание 3458A
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