4 Performance Verification Tests
68 Keysight 3458A Calibration Manual
DC Current Performance Tests
Required equipment
The following equipment or its equivalent is required for these performance tests.
– Stable DC current source (Fluke 5700A or equivalent)
– Transfer standard DMM (3458A Opt. 002 within 90 days of CAL)
– Low thermal test leads (such as Keysight 11053A, 11174A, or 11058A)
Preliminary steps
1 Verify that the DC current source is properly warmed up.
2 The 3458A requires a 4 hour warm-up period. If this has not been done, turn
the instrument ON and allow it to warm up before proceeding.
3 The internal temperature of the 3458A under test must be within
5 degrees C of its temperature when last adjusted. The current internal
temperature is obtained by executing TEMP?. Compare this temperature to the
calibration temperature obtained by executing the command CAL? 60. Record
these temperatures on the DC CURRENT TESTS Test Card.
4 If the instrument self test has not been run, make certain all inputs are
disconnected and execute the TEST function. The display must read “SELF
TEST PASSED”.
5 Execute the ACAL OHMS function on both the transfer standard DMM and the
UUT. This auto calibration will take approximately ten minutes to complete.
6 Configure the transfer standard DMM as follows:
–DCI
–NDIG 8
– NPLC 100
–Trig SGL
7 Configure the DMM under test as follows:
–DCI
–NDIG 8
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