Vivax Metrotech 4.04.000170, User Handbook Manual

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Page 29 of 66
3 Using the vLoc3 RTK-Pro
3.2.3 Induction (for frequencies above 8kHz)
When no direct connection lead or signal clamp is connected, the transmitter will automatically start to radiate (induce) a signal
around the transmitter. These signals will penetrate the ground and couple onto buried lines. The signal will then travel along the
line, which can be detected with the vLoc3 receiver.
Applying an induction signal to a line.
Remove all connections from the output connector. Switch on the transmitter and place it over the suspected position of the line
and position it so that it is in line with the target. In the case of the Loc3 series transmitters, that is with the handle pointing along
the line.
The induction mode is particularly useful where there is no access to the line, but it should be noted that this is the least efficient
method of applying a signal. It is also prone to signals being applied to adjacent lines.
15ft
(4.5m)
d
d
Also, note that the signal will radiate out to the sides and below the transmitter. For this reason, it is recommended that when
applying a signal using the induction method, a distance of at least 4.5m (15-feet) is kept from the transmitter when pinpointing
or taking depth readings.
When using the induction mode, avoid placing the transmitter over metallic manhole covers. Doing so will severely reduce the
transmitter's effectiveness and, in extreme cases, cause damage to the transmitter’s circuitry.