The
MAC-51Bx (the most cost-effective, all-purpose locating system on the
market) consists of a receiver and a transmitter that simultaneously
transmits on two frequencies - 571 Hz (LF) and 82.5 KHz (HF). The receiver
has a three position switch that lets you change modes, "on-the-fly",
between LO, HI, and MAG, for cable and line tracing with break locating,
pinpointing a ferrous metal target, or identifying and pinpointing an
energized 50/60 Hz power line.
In the LO
and HI modes, the receiver's 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-the-fly mode-changing feature lets you locate a complete break
using the LO mode, and then continue on to trace beyond the break in the HI
mode, or trace a metal pipe joined with non-conductive gaskets.
The
MAC-51Bx by simultaneously transmitting 82.5 kHz (HF) and 571 Hz (LF)
signals. This feature lets you select and compare received audio signals
from both frequencies along with magnetic information without having to
return to the transmitter.
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-the-fly. Providing a good electrical
contact between the clip and the conductive portion of the target line by
removing rust or paint before attaching the clip is very important.
Magnetic
Locating Mode
Only the MAC-51Bx receiver is required when operating in the magnetic mode.
Just set the Mode switch to MAG, the Gain control to mid-range, and you're
ready to locate underground ferrous pipes, water meters, water valves, and
property markers - or anything that has a magnetic field including the
50/60Hz electro-magnetic field generated by energized power lines.
Options
Mini-Transmitter
The MT-2 (Mole) is a miniature transmitter designed to be used in
conjunction with the MAC-51Bx Receiver. It is just what you need to trace
non-metallic pipes, pinpoint obstructions in pipes, locate concrete septic
tanks, and monitor the course of utility tunneling under highways.
As the Mole, attached to the end of a sewer/ drain cleaning snake, is pushed
through a non-metallic pipe, it emits a strong signal that you can detect
and trace at depths up to 18 feet using the MAC-51Bx receiver set to the HI
mode.
The MT-2 is very easy to attach to a plumber's snake with the use of
electrical tape, due to it's one concave surface side.
The MT-2 provides years of trouble-free operation and uses one AAA penlight
battery to provide up to 30 hours of operation. The battery cap also serves
as the On/Off switch. You turn the power off by rotating the battery cap
counterclockwise.
Conductive Cable Assembly
The Conductive Cable Assembly is used for applying the tracing signal
directly to an exposed section of a cable, line or metal conduit for maximum
tracing distance.
Accessory
Inductive Signal
Clamp
The Inductive Signal Clamp increases the versatility of the MAC-51Bx by
providing a convenient method of selectively applying the trace signal to
conductors covered with non-metallic insulation.
