HT instruments HT5000 - Manual (Page 22)

HT-5000
EN - 21
4.3.4 Determining the depth of a line
The RX5000 receiver has an automatic push key depth measurement feature. One
precondition is that a clear signal from the TX5000 transmitter is coupled onto the
conductor to be measured. For this procedure, the transmitter's signal has to be
continuous (not pulsed) (see paragraph 4.2.1).
In addition to this precondition, automatic depth measurement will only function when the
mode of operation of the receiver is set to TRANSMITTER. It will not function if set to
POWER
GRID or RADIO
If these preconditions are not met, a rough estimate of the depth may be made using the
manual method
If the depth of a non-metallic pipe needs to be determined, the measurement has to be
made with aid of a probe, e.g. FlexSonde GOK50-R (see paragraph 4.2.2.4). In order to
accommodate the transmission characteristics of a probe, the RX5000 receiver has a
special depth measurement mode which has to be activated through the system settings
(see paragraph 4.3.1.3)
As a result, the way a depth measurement can be performed depends not only on the
active operation mode but also on how the depth measurement mode is set (Transmitter
or Probe). A symbol in the lower left of the display indicates which mode is currently
accessible
Symbol Description
For determining the depth of a probe which has been pushed into a
non-metallic pipe
For determining the depth of a line, the signal of an active transmitter
is coupled onto
For determining the depth of a line which carries radio signals or grid
frequency signals
ATTENZIONE
Even after the depth has been successfully determined, all excavation work
should be done with caution. This is particularly important if a rough estimate
of the depth was made, as this can result in even greater deviations
Follow the steps below to determine the depth of a metallic conductor:
Step Action
1
If the depth of the conductor will be determined with the aid of the
TX5000 transmitter, couple the transmitter's signal onto the metallic
conductor in such a way that there is as little signal loss as possible
(see paragraph 4.2.2 e paragraph 4.3.1)
Do not forget to set the transmitter to continuous signal, not a
pulsed signal when measuring depth
2
Press to switch on the receiver
3
Select the desired mode of operation by pressing the key (see
paragraph 4.3.1). The symbol for the currently selected mode of
operation is shown in the lower right-hand corner of the display
3