3M
™
Advanced Systems Tester 900AST Series
16
High Voltage
This screen indicates that a high voltage (120 VAC/
VDC or greater) has been detected between the test
leads when the 900 AST tester is not in the Voltage
Mode. The 900AST tester has opened an internal
relay to protect itself from damage. Use standard
customer safety practices for disconnecting the test
leads since a high voltage is present.
Press the
key to restart the 900AST tester.
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