HT instruments HT5000 - Manual (Page 14)

HT-5000
EN - 13
4.2.2.4 Signal coupling in non-metallic pipes
With the aid of the FlexSonde GOK50-R the transmitter's signal can be transmitted
through non-metallic pipes, as shown in the picture below:
Fig. 9: Signal coupling in non-metallic pipes
Alternatively, any other active probe (e.g. a camera probe) with adequate transmitting
frequency can be located using the receiver. For a detailed description, please refer to the
manual of the respective product.
When locating non-metallic pipes, the following guidelines should be observed:
• Contrary to the line location, a probe location has to be performed in perpendicular
position to the probe, i.e., the handle of the receiver has to be hold at right angle to the
probe
• Practice locating the probe or FlexSonde head before pushing it into the drain or duct.
• Strongest signal will be detected when the receiver is above and perpendicular to the
probe (as shown in Fig. 9)
The signal transmitted by the probe results in three signal maxima on the ground surface
level. Typically, there is a smaller maximum in front of the actual signal maximum and one
behind it.
For this reason, it should be always evaluated whether there are further signal maxima in
front of or behind the detected signal maximum. An accurate depth determination can only
be performed directly above the actual (highest) signal maximum.
If the receiver is operated in automatic sensitivity level adjustment mode, these lower
signal maxima are usually masked-out