PCMx Operation Manual
© 2021 Radiodetection Ltd 21
Connect the white cable from the PCM transmitter to the
pipeline connection, and the green cable from the PCM
transmitter to the anode.
Note: If the anode is heavily depleted it will be high
resistance, and the transmitter signal lights will
indicate higher voltage.
In this case it is advisable to use a series of long ground
stakes to provide low resistance grounding for the
transmitter.
Whatever grounding is used for the transmitter, it should
have a resistance of less than 20 Ohms to ensure good
current output from the transmitter.
Using another pipeline as a ground for the transmitter is
an effective way of applying the signal.
Note: Make sure that the other pipeline runs in a different
direction from the pipeline being survey.
Streams, drainage ditches, dykes, marshes, or any mass
of water can be used to ground the transmitter.
Connect the green lead to any large metal object and
submerge it in the water.
Note: Make sure that the pipeline is not running through
the same wet area.
Other electrical fixtures can be used to ground the PCM
transmitter. However, this will cause all electrical cables
in the area to carry the PCM Transmitter signal.
If these cables run near the pipeline, they may affect the
survey results.
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