Calibration Procedures 6
Adjustments procedures
U3606A User’s and Service Guide 189
Adjustments procedures
You will need a test input cable and connectors set, and a shorting plug to
adjust the instrument (see “Input Connections” on page 141).
Zero offset adjustment
Each time you perform a zero offset adjustment, the instrument stores a
new set of offset correction constants for measurement functions and
ranges. The instrument will sequence through all required functions and
ranges automatically and store new zero offset calibration constants.
Zero offset adjustment procedure
Be sure to allow the instrument to warm up and stabilize for 120 minutes
before performing the adjustments.
1 Follow the steps outlined below. Review the “Test Considerations” on
page 140 before beginning this test.
2 After unsecuring the instrument, the instrument goes into the
adjustment mode (“CALib” is shown on the lower secondary display)
with the upper secondary display showing “Short”. Connect the shorting
plug between the V (red) and LO (black) front panel input terminals.
Leave the current input I (red) open.
After each adjustment finishes successfully, the primary display briefly
shows “PASS”. If the calibration fails, the instrument beeps, the primary
display shows “FAil” and an error number is shown in the upper secondary
display. Calibration error messages are described on page 263. In the event
of a calibration failure, correct the problem and repeat the procedure.
Never turn off the instrument during zero offset adjustment. This may
cause ALL calibration memory to be lost.
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