Programming instructions

44 Chapter 4 Performance Verification Tests
points.
11. If any of the differences calculated are greater than the
specified
limits, refer to Chapter 3, "Adjustment Procedures", to make
adjustments.
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 standa
rd
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
-- NPLC 100
-- Trig SGL