Performance Verification Tests 4
Keysight 3458A Calibration Manual 69
– NPLC 100
–Trig SGL
DC current function offset test
The following procedure tests the DC current offset specifications with the input
terminals open.
1 Set the 3458A under test to the DC Current Function (DCI).
2 Set the range of the 3458A under test as specified in Table 4-4.
3 Let the instrument sit for 5 minutes to allow the range relays to thermally
stabilize.
4 Execute Trig and record the absolute value of the offset reading of each range
listed in Table 4-4 on the DC CURRENT TESTS Test Card provided at the end of
this section.
5 If the offset tests are out of specification, perform another ACAL before
performing step 6 below.
6 If any of the offset readings are beyond the limits specified in the Test Record,
the instrument should be adjusted. Refer to Chapter 3, “Adjustment
Procedures” to make adjustments.
Table 4-4 Current offset performance tests
Offset test number DMM range
1 100 µA
21 mA
310 mA
4100 mA
51 A
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