RD4000 Locating System User Manual
Page 54
ACCESSORIES
Note: For ease of identification all transmitter accessories have 4 pin connectors
and all receiver accessories have 8 pin connectors.
Receiver Accessories
Receiver accessories include:
a) Headphones
d) Stethoscopes
b) Clamps
e) Submersible antennas (for underwater use)
c) Sondes
f) Accessory A-frame
Summer headphones and winter headphones
Headphones are useful in noisy environments such as that caused by
heavy traffic and enable the user to hear the audio response from the
receiver. Radiodetection headphones are lightweight or heavyweight for
use in different climatic conditions.
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.
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.
Note: The standard clamp cannot be used with CM or CD. A special CM/CD clamp is available.
Connecting the clamp
Put the clamp connector into the accessory socket on the front
of the RD4000.
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 bargraph
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.
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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