Product Manual

LIST OF FIGURES

Figure Title Page

3-1 Amplifier Connectors & Controls 3-1

3-2 LD-12 with Ground Microphone 3-3

3-3 Listening Ranges for Combinations of Filters 3-4

3-4 Limitter and Filter-Thru Switches 3-6

3-5 Ground Microphone for Streets 3-7

3-6 Magnet Base for Hydrants & Valves 3-7

4-1 Sound Intensity vs. Water Pressure Graph 4-2

4-2 Filtered Frequencies Graphs 4-2

4-3 Absorption of Sound Frequencies by Soil 4-3

4-4 Sound Attenuation of Different Frequencies 4-4

by 4 feet of Soil

4-5 Sound Transmission vs. Distance from Leak 4-4

4-6 Leak Survey at a Hydrant 4-6

4-7 Water Leak Pinpointing 4-7

4-8 Leak Survey at a Meter 4-8

4-9 Leak Pinpointing Over a Hydrant Line 4-9