General Tools and Instruments BF10 - Manual (Page 8)

To identify the breaker or fuse associated with the branch
circuit the transmitter is plugged into:
1. Slide the function switch on the transmitter to the left (the
Breaker Find position).
2. Go to the circuit breaker panel and begin scanning
breakers by touching the tip of the receiver to each breaker
in turn. If the panel is in a dark area, turn on the built-in
flashlight (Fig. 1, Callout C) by pressing the
button
(Callout I). Touching breakers will cause the red LED on the
receiver (Fig. 1, Callout G) to light but at least one breaker
will cause the green LED on the receiver (Fig. 1, Callout F)
to light. If only one breaker causes the green LED to light,
that breaker is the one associated with the outlet that the
transmitter is plugged into.
3. If more than one breaker caused the green LED to light,
scan all breakers in the panel again. If doing so causes the
green LED to light just once, the breaker that “tested
positive” is the breaker associated with the outlet that the
transmitter is plugged into.
4. If the second scan lights the green LED more than once,
scan all the breakers a third time. A third scan will always
light the green LED on the receiver just once. The breaker
that tested positive is the one associated with the outlet
that the transmitter is plugged into.
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