General Machine Products RD7000 Traceable Rod Detection - Manual (Page 21)

RD7000 Operation Manual 15
The first person operates the transmitter and the second
person operates the receiver. The transmitter induces a
signal onto lines as it passes over them and the lines are
then detected with the receiver 20 paces upstream or
downstream of the transmitter. Hold the transmitter with
its length aligned with the assumed direction of any lines.
The second person holds the receiver at the start of
the area to be searched and with the receiver antennae
at right angles to the probable direction of the buried
lines. Set the receiver sensitivity level as high as possible
without the receiver picking up any airborne signals
directly from the transmitter.
When the transmitter and receiver are in line both
operators start to move forward in parallel. The operator
with the receiver sweeps it backwards and forwards,
keeping the receiver vertical, as they proceed in parallel
with the transmitter. This method allows for misalignment
of the transmitter, receiver and buried line.
The transmitter applies the strongest signal to the lines
directly below it, which are then located with the receiver.
Move the transmitter from side to side to establish the
highest signal which indicates that the transmitter is also
directly above the line(s).
Mark the ground at the point of each peak signal detected
with the receiver. Repeat the search along any other
possible paths of lines.
Once the positions of any lines have been marked,
reverse positions, place the transmitter over and along
each line in turn, and trace the line out of the search area.