The AUT9 generates either a swept ultrasonic (above normal hearing  range) or audible tone that is applied to the wires under test via the small alligator clips. The AUT9 is input protected to 400 volts DC or normal 100+ volt 20/30 Hz AC telephone ring signals. DO NOT CONNECT THE AUT9 TO 110 OR 220 VAC 50/60 HZ POWER LINES. Use the neutral and ground wires for tracing these lines. If a ground does not exist, make sure the lines contain NO AC voltage.  The ULTRASONIC tone can be applied to a telephone line even while it is being used. OPERATION: The AUDIBLE tone from the AUT9 can be traced with the SLR9A (OPTIONAL), an audio amplifier/preamplifier (such as the1059) or an AM radio. To trace a pair of wires, connect the AUT9 across the pair. Search with the SLR9A or 1059 until the pair is located. To trace a wire bundle, connect one lead of the AUT9 to any wire in the bundle and the other lead to EARTH GROUND. This is usually the ground pin of an AC outlet. Hold the antenna of the AM radio at right angle to the cable bundle and tune near 540KHz for the loudest signal. Follow the signal. The ULTRASONIC tone can be traced with either the SLR9A (OPTIONAL) or AM radio. Connect the AUT9 across the wire pair and place the power switch in ULTRASONIC. Search with the SLR9A in ULTRASONIC until the tone is located. To locate a wire bundle, connect one lead from the AUT9 to any wire in the bundle and the other to EARTH GROUND. Search for the tone with either the SLR9A or AM radio.  When using the AM radio, tune near 540 KHz for the loudest harmonic of the ultrasonic tone. Follow the signal. 8/09 Back To Products      Home