Operational Verification Tests
2
Keysight 3458A Calibration Manual
29
Operational Tests
Required equipment
The following equipment or its equivalent is required for these operational tests.
– Stable DC voltage/resistance standard (Fluke 5700A or equivalent)
– Transfer standard DMM (3458A Opt. 002 within 90 days of CAL)
– Low thermal short (copper wire)
– Low thermal test leads (such as Keysight 11053A, 11174A, or 11058A)
Preliminary steps
1
Verify that the DC voltage/resistance standard is properly warmed up.
2
The 3458A requires a 4 hour warm-up period. If this has not occurred 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
°
C of its
temperature when last calibrated. Use the TEMP? command to obtain the
current internal temperature and compare it to the calibration temperature
obtained by executing the command CAL? 59 for DCV and CAL? 60 for OHMS.
You can use the
←
and
→
scroll keys to view entire CAL? message. Record
the temperatures on the 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. This auto calibration will take approximately
ten minutes to complete.
6
Configure the transfer standard DMM as follows:
NOTE
– Equipment required for the adjustment procedures can be used for
operational tests since the three-point test verifies the external adjustment
points of the adjustment procedure.
– To have your transfer standard 3458A OPT. 002 calibrated to 90 day
specifications, contact your Keysight Technologies sales and service office.
Содержание 3458A
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