3M
™
Advanced Systems Tester 900AST Series
23
Self-Calibration
Use this function to calibrate the 900AST tester
anytime the outside temperature changes by more
than 35°F (20°C). Calibrate the 900AST tester at
the same temperature at which it will be used.
Note: Initiate a self-calibration prior to the very
first use of your 900AST tester.
You will see the following screen as soon as you
select Self-Calibration from the Toolbox.
Short the test leads together, then press to
continue.
The screen shows “Self-Calibration Complete”
when the calibration is done, or “Self-Calibration
Failed” if the calibration fails. In this last case,
check the test lead connections and try again.
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