ADS Environmental Services Eureka2R QR 775019 A1 - Manual (Page 18)

ADS Eureka2R Leak Noise Correlator User Manual
14
Installing Hydrophones
Connecting a hydrophone to a hydrant requires a hydrant cap suitable for the
local hydrant and an adaptor that accommodates the 1-inch male BSP threaded
connection on the hydrophone and the female threaded port on the selected
hydrant cap.
Note: ADS recommends removing the hydrant cap and allowing the
hydrant to flow to clear out debris and stagnant water in the pipe prior
to attaching the hydrophone hydrant cap assembly and re-pressurizing
the hydrant for the survey. In addition, verify that the hydrant exhibits
adequate water pressure.
Mount the hydrophone to the hydrant in the following way:
1. Assemble the hydrophone and hydrant cap using the transitional thread
adaptor and tighten to ensure a good seal under pressure. Consider
using sealing washers or thread seal tape (also known as PTFE or
plumber’s tape) on the threading to prevent leakage.
2. Verify that the hydrant valve is closed.
3. Install the hydrophone assembly onto the hydrant, and then tighten it in
place.
4. Make sure the bleed valve is closed and the assembly is secure.
5. Slowly open the hydrant valve, and verify that no leakage occurs from
the hydrophone. If leakage occurs, close the valve, remove the
assembly, and apply measures (such as seals or taping) to the assembly
threading to address the leakage before proceeding.
6. If no leakage exists, fully open the hydrant valve to completely charge
(e.g., fill) the hydrant. Filling the hydrant applies pressure to the caps,
including the hydrophone assembly, on the hydrant.
7. Open the hydrophone bleed valve slightly to allow air to escape.
8. Close the bleed valve once only water is escaping.
Once installed correctly, connect the hydrophone directly into the Eureka2R or
to the radio transmitter.
Before removing a hydrophone assembly, make sure the hydrant valve is
closed. Then, reopen the bleed valve to release the pressure.