4 Locating
Page 23 of 33
Switch on the transmitter. The Induction signal will radiate outward through 360 degrees into the ground
ensuring any cables and pipes in close proximity to the transmitter will have signal induced into them.
Position the vScan receiver approximately 10m from the transmitter and with the flat of the blade pointing
directly at the transmitter. Switch it on and adjust the sensitivity so that approximately 20% reading is
observed.
Walk slowly around the transmitter watching for an increase in signal level. At an increase, pinpoint the
source of the signal and mark the ground at the maximum point. Repeat until the complete circle is checked.
Finally check the route of the services detected by placing the transmitter in the more conventional way (ie
flat on the ground and across the direction of the service) and tracing the signal though the area.
Note that, when the transmitter is positioned vertically as above, there is no signal induced directly below the
transmitter. It is therefore necessary to move the transmitter approximately one meter to the side and repeat
the locate exercise in case a service crossed directly below.
