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4.2 Preliminary route inspection
1
. Place the acoustic sensor over
the supposed pipeline location
5.
Set the headphones to
required volume
buttons◄/►
7.
We recommend you to record
the points where signal level is the
highest into the memory of the
device by pressing the memory
button
The receiver has an ability
to record/view 30 saved
signal levels Output signal
level values are recorded every time
by pressing the memory button
measurement mode
using the button
the filter
6.
As you move along the route, move the acoustic sensor
in increments of approx.1 m. and place markers in the
using
7.1.
Browse the saved memory (Appendix B), select the
areas with the highest signal and search for leaks in the
marked spots If on the extraneous background sounds you
can hear the distinctive sound of the leak, set the filter
(p.4.3). If not - move the sensor to another proposed
Number of the
memory cell.
Selection of the
required memory
cell is made by
◄/► buttons
levels of useful signal, fixed by memory buttons
2.
Switch on the
3.
Set the
broadband mode
, by pressing
button.
spots where the signal level is the highest
Signal level
location
pressings
9
4.
Set input signal level using
sensitivity buttons
Narrow scale indicator
readings should be preferably
at 50...90% of maximum value
МAX
valid value signal leve
и
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