Heath-consultants Aqua-Scop Manual de usuario descargar pdf (Pagina 23)

(Figure 10)

As you can see from Figure 10, in preliminary detection the Direct Contact

Microphone is connected with the Amplier Module and the Headset is

plugged into the jack on the Amplier Module. The Volume is then turned

clockwise and the amplication is turned up enough so that the sound

of a leak is recognizable. The position of 4 to 6 on the volume control is

recommended for best sound intensity.

Procedure of Preliminary Detection: The point of the Direct Contact

Microphone is placed on the part of the line, which is to be checked. The

point should be abraded and rmly held against the line to insure good

contact. When the Direct Contact Microphone is rmly placed on the line,

the “Listen” control switch on the Amplier Module is depressed. This will

complete the electrical contact between the microphone and the amplier.

The switch should not be depressed before or while making contact, as

the noise of making contact is unpleasant to the ear. Tests are made in this

manner and sound levels for the tests compared (see Figure 11). Figure

12 is an example of the above technique in a eld situation. The Direct

Contact Microphone should not be immersed in water. If a test must be

taken in deep water, use the extensions or contact the line or desired test

point with a rod or key. The tip of the Direct Contact Microphone is then

used on the rod or key.

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Heath-consultants Aqua-Scop Manual de usuario Pagina 23