Elcometer 701 Operating Instructions Manual page 16

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RANSMITTER USE
4.3.3 Inductive signal coupling
For lines which are not easily
accessible, the signal
transmitter has to be inductively
coupled via the integrated antenna.
This is highly recommended
unknown lines are to be located (e.g.
at a construction site).
To determine the orientation of a
specific line, the transmitter has to be
positioned directly above the line as
shown in the following illustration. The
best signal coupling is achieved when
the handle of the transmitter housing
is aligned with the lay of the line.
When locating lines using inductive
signal coupling,
guidelines should be observed:
• As the signal can be coupled to
other conductors when using
inductive coupling,
coupling (see pages 10-13) of the transmitter is always preferable when locating lines
selectively. Inductive signal coupling should only be chosen in cases where the line being
located is not easily accessible.
• While taking measurements, make sure that a distance of at least 15 m is always maintained
between the receiver and transmitter in order to prevent the coupling of the transmitter's signal
through the air.
• When searching for unknown lines at a site, the position of the transmitter has to be changed
at least once by one metre and 90°.
• It is also a good idea to position the transmitter at visible cable ends such as at distribution
boxes or light poles.
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SETUP AND SIGNAL COUPLING
from the
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the following
direct