3M
™
Advanced Systems Tester 900AST Series
30
Tone
Use this function to send an interrupted ID tone on
a pair of conductors or between a conductor and
ground for identification using a tone probe (not
supplied with the 900AST tester). Connect the Red
and Black test leads to the conductors under test.
Press to start sending the ID tone.
The volume of the tone heard in the 900AST tester
speaker may be adjusted. Press the
and keys
to adjust the volume. Use
to stop sending.
Note: The volume control does not affect the level
of the tone sent on the circuit.
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