General Machine Products RD7000 Traceable Rod Detection - Manual (Page 29)

RD7000 Operation Manual 23
Section 7. – Using Accessories
7.1 About accessories
Both the transmitter and receiver are compatible with
a wide range of accessories, including most RD4000
accessories. Use clamps to help apply a signal to pipeline
or live wire. Use an A-Frame to provide the RD7000
receiver with advanced fault-finding capabilities.
When an accessory is connected, the receiver or
transmitter will instantly recognize it and will enable
the mode appropriate to the accessory. For example,
attaching an A-Frame to the RD7000 receiver will
automatically switch the receiver to fault-find mode and
limit the number of available frequencies to those that are
compatible with the A-Frame. The LCD will also display
an icon of the accessory and will remove any non-
essential icons from the screen.
For a full list of supported accessories, please refer to
Appendix 9.6
7.2 Receiver clamps
A receiver clamp is used to positively locate and identify a
cable when several cables are running close together.
A target cable can be identified in a chamber, on a tray or
other access point by fitting a clamp to the receiver and
examining each cable in turn. Signal strength response
shown on the receiver display should be noted for each
cable.
7.2.1 When to use clamps
Clamps can be used where:
Several cables or pipes run in close proximity to
each other.
A cable or pipe is accessible at an inspection hole or
manhole.
•
•
7.2.2 Connecting a clamp
Put the clamp connector into the accessory
socket on the front of the RD7000 receiver.
Place the clamp around the pipe or cable and
switch the receiver on.
Set the frequency to the same as that on the
transmitter.
Put the clamp around each cable in turn and note
the bar graph response. Compare the strength
of response from each cable. The cable with a
substantially stronger response than the others
will be the cable to which the transmitter signal
has been applied.
1.
2.
3.
4.
Figure 7.1: Connecting a
receiver clamp
To ensure that the target cable has been correctly
identified, reverse the positions of the transmitter and
receiver and check that the strongest response is still
received from the target cable by the receiver in its new
position.
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