sewerin Hydrophone HA, Use And Installation

Page: 3 / 4

2
Hydrophone HA – Use and Installation
1 Use
Hydrophone HA
is a device used for receiving leak noise at non-
metallic water-filled piping systems up to pressure stage PN 16.
The device may be mounted only on hydrants or on conus-shaped
Whitworth 1” female threads (e.g. water meter connectors).
The device contains a Piezo sensor. This sensor records leak
noise by contact with the water. The noise signals are transmit-
ted via cable to a radio transmitter and are then evaluated by a
correlator, together with the signals of a second Hydrophone HA
device.
To permit a more accurate evaluation of the signals, a frequency
filter (e.g. active filter ZF OI) can be used.
2 Installation
Flush the line until the water flowing out is free from dirt.
Notes:
Make sure that no dirt enters the piping system du-
ring mounting.
Make sure that there are no leaks at the junction
points to avoid interfering noise at the Hydrophone.
If necessary, seal the 1” thread.
Applies only to underground hydrants: Install an adapter as
follows:
Apply a thin film of lubricant (e.g. Vaseline) on the rubber
seals of the adapter. Use only lubricants which are not harm-
ful to drinking water.
Place the adapter on the hydrant opening.
Turn the adapter until the claw nut locks in at the limit stop
below the claws of the hydrant.
Use the turning tool to turn the inner part of the adapter until
the adapter sits firmly on the hydrant.
Screw the Hydrophone manually into the adapter / 1” thread.
The coupling for the venting hose must point upwards.
Connect the venting hose to the coupling.


–
–
–
–

