Schonstedt MAC 51-
In the LO and HI modes, the receivers audio signal provides a sharp null when its tip is directly over the target. In the MAG mode (no transmitter required) the audio signal peaks when the receiver's tip is over the target. You can trace the 571 Hz LF signal conductively applied to any continuous metal conductor up to 4000 feet.
The receiver's on-
Transmitter Inductive Mode (HF only)
Induction is achieved by placing the transmitter over the target cable/pipe or by using the optional Inductive Signal Clamp. It's the easiest and quickest way to applying a trace signal that is strong enough for tracing most lines. The trace signal generates an alternating magnetic field around the cable which induces a signal into the receiver's cable sensor. A sharp null in the audio signal between the two peaks occurs when the receiver's tip is directly over the cable.
Transmitter Conductive Mode
If an exposed section of a target gas or water pipe is accessible, conductive coupling
is the most reliable method for applying the trace signal. This mode has to be used
to apply both HF and LF frequencies so that you can use all three features on-
Magnetic Locating Mode
Only the MAC-
Operating Voltage Battery Life 9 V (2 alkaline or 2 lithium batteries) 60hrs, alkaline
(on & off usage @ 70°F) 120 hrs, lithium (on & off usage @ 70°F) Audio Output Approx.
40 Hz idling tone from speaker Frequency of pulsing tone (increases or decreases)
with signal intensity Weight Operating Temp. Overall Length Waterproof Length Nominal
Sensor Spacing 2.64 lb. (1.20 kg.) -
Operating Voltage Battery Life RF Output 12 V (8 alkaline C-
Toll Free: 1-