15
78-9000-0021-3-D
November 2016
Induction Method
If you cannot make a direct connection, or use the 3M
™
Dynatel
™
Dyna-Coupler clamp to apply a locating signal on the target, use the
induction method . This method uses the internal coil of the transmitter
to generate a magnetic field. This is the least preferred method of
applying a signal on a target conductor because it can easily be picked
up by other non-target conductors in the area . However, it is the
preferred method of applying a signal to multiple cables/pipes in the
same trench .
1 . Verify battery level of transmitter and remove any cables from the
output jack .
2 . Position the transmitter over the target facility, with the hinge of
the transmitter over and in line with the cable/pipe path .
3 . Align the Induction Direction arrows on the transmitter with the
target conductor .
4 . Turn on the transmitter by pressing the frequency key .
5 . Select high output level when using a 3-watt transmitter, or high
output or max output level when using a 12-watt transmitter, for the
best signal-to-noise ratio .
6 . Trace the signal path with the receiver using the Induction Peak
mode .
The Induction Peak mode of the receiver is a mode in which the
upper antenna of the receiver is tuned to minimize distortion from the
magnetic field of the transmitter.
This mode is indicated by the induction icon in the bottom left-hand
corner of the receiver's locate screen .
Note: If nothing is plugged into the output jack of the transmitter, the transmitter
will automatically turn on the internal antennae, and 82 kHz will broadcast
in induction mode. For best results, the receiver should be at least 25 feet
(7.6 m) away from the transmitter to begin tracing the target path. Attempt-
ing to trace the target close to the transmitter may lead to false indications
due to the receiver detecting the large magnetic field radiating from
the transmitter.
Summary of Contents for Dynatel 2220M-C3W-CPLR
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