ADS Environmental Services Eureka Digital QR 775020 A0 - Manual (Page 56)

ADS Eureka Digital System User Manual
52
Attaching the Transducers
The following sections include instructions on installing accelerometers
and hydrophones.
Accelerometers
The transmitters have magnets integrated into the base and a built-in
accelerometer. This configuration typically provides good results when
the transmitter is located aboveground. If the transmitter must be on the
ground surface for adequate radio reception, use the remote accelerometer.
1. Place onto a metal fitting (preferably an unpainted, rust-free, clean
metal surface).
2. Ensure a rigid physical contact.
3. Check the connection by listening through the headphones.
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 value 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.