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6 Measuring the sound velocity
Measuring the sound velocity
To create a source of noise, either generate a man-made leak
(e.g. open hydrant) or bang on the fitting in quick succession
using a hammer.
Select „start“ using the arrow keys.
The measuring procedure will begin.
After the
measurement, the correlation function will appear in
the display.
The cursor will automatically be placed at the position with the
greatest value. Check whether this position is your man-made
leak. If necessary, move the cursor to the man-made leak us-
ing the arrow keys or the rotary regulator.
If you select
“accept“ in the menu:
The calculated
sound velocity will be applied in the internal
memory.
You will exit the
“measure sound velocity” measuring method
(and return to the “standard” measuring method).
Return to the main screen.
You can now perform a correlation measurement to detect the
real leak. When entering any modifications to the
pipe data,
also enter the calculated sound velocity by selecting “manual”
under pipe material.
If you select “cancel“ in the menu:
the calculated sound velocity will not be applied.
you will exit the “measure sound velocity” measuring method
(and return to the “standard” measuring method).
Return to the main screen.
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