6
Setup
NOTE: REMOVE PROTECTIVE TAB IN BATTERY COMPARTMENT BEFORE
USE. UNIT WILL NOT POWER UP WITH TAB IN PLACE.
Note: The transmitter produces high voltage. Turn the transmitter off before
handling the output leads. Disconnect all wires from the controller when fault
locating. Turn the selector knob to the BATTERY TEST position. The meter
should read between 8 and 10.
Before starting, you must ensure the transmitter is set up properly.
IMPORTANT:
To ensure that the 521A transmitter is producing optimum signal,
connect the red and black leads together and turn the unit on. Turn the selector knob
to position #5. The meter needle should rise to at least a 10 reading. If the meter
reads below 10 and the batteries are known to be good, return the unit for repair.
Electric shock hazard:
Do not connect transmitter to any active AC circuits over 120 VAC.
Failure to observe this precaution may result in injury and can damage the
instrument.
1. With the transmitter off, connect the red lead to the wire to be located and the
black lead to a good earth ground with the stake provided. (Refer to Figure 1.)
If the clock is indoors, the earth ground stake MUST be grounded at the point
where the wires exit the building. It might require running a length of wire to the
outside. Do not use a common ground inside (i.e., electrical or water pipe).
2. Now turn the transmitter on and start rotating the selector knob clockwise.
Once you leave the BATTERY TEST position and go to #1, the meter needle
will fall off to near zero. As you increase the output, the needle will rise slightly
with each advancement. Stop when
the meter reads between 4 and
8. The transmitter is now set for
maximum efficiency for this job. If a
reading of 4 is not obtainable, you
may not have enough of a ground
fault to locate the wire.
3. Plug the optional headset into
the receiver if desired, turn it on
and point the antenna or probe
end at the transmitter. A pulsing
tone should be heard through the
headset and an indication should
register on the receiver meter.
Note: High pitched tones from
the headset may occur if the
headset cord gets too close
to the receiver antenna or the
receiver battery is low.
Transmitter
Wire
Earth
Ground
Figure 1 – Transmitter Setup
