Heath-consultants Aqua-Scop Manual de usuario descargar pdf (Pagina 24)

SOUND LEVEL INTENSITY AT DIFFERENT TEST POINTS

(Figure 11)

Example of a Preliminary Detection (Figure 12): After opening valve boxes

on the main at 1, 2 and 3, the valve stems are checked with the Direct

Contact Microphone. At all three valves a small noise is recognized. The

noise at valve 2 is a little bit louder but it is not enough louder to determine

a difference in the intensity of sound. To decide the further direction of

examination, take comparative measurements at curb valve 4, at hydrant

9 and at curb valve 10. While the noise at point 4 is louder, no noise is

heard at point 9 and 10. The search is continued in the direction of point 4.

Further listening at points 5 and 6 shows a small increase of intensity of

sound and a slight decrease at point 7.

(Figure 12)

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Heath-consultants Aqua-Scop Manual de usuario Pagina 24