Instruction Manuals: Hydrophone

Your new Hydrophone is an extremely sensitive microphone designed to pickup noises underwater. In most cases when water escapes from the pool it produces a turbulence as it passes through the hole. The highly sensitive Hydrophone allows you to pin point leaks by listening for, and locating the source of this turbulence.

Equipment Needed:

• Anderson's Hydrophone
• XLT16 Electronic Listening Device

Set Up:

• Have pool filled to normal operating level.
• Turn off pump and heater before performing any test with the hydrophone.
• Hookup the Hydrophone to the XLT16 by plugging the 5 pin connector into the back of the amplifier box.
• Lower the Hydrophone into the pool, turn the sensitivity control "ON", and very slowly raise the volume to the desired level.

Test:

Identify all areas you plan to test. Here are some suggested areas to use your Hydrophone:

• Skimmers and Returns: The hydrophone can detect leaks in the plumbing lines and around fittings.
• Light Niches: Move the hydrophone around the outer rim of the light. If you suspect the leak is in this area, remove the light and scan the area with the Hydrophone.
• Main Drains and Cracks in the shell of a Gunite Pools: Attach the Hydrophone to the end of a vacuum pole and survey the area.

Here are a few tips:

• Most leaks will create a wooshing type sound that increases in volume as you move closer to the leak.
• You can get a good idea of the type of sound you are listening for by discharging a syringe underwater.
• Turn the volume down or use the mute switch when moving from one area to another.
• Leaks near the surface may be more difficult to detect because of the reduced pressure and resulting turbulence, and the confusing surface noises that are transferred into the water. Use the frequency filter to eliminate confusing noises and highlight the leak sound.