20
The measurement can be stopped before the end of the set
measurement period by pressing the (stop) soft key.
Figure.17 illustrates a typical sound level graph created during a
continuous measurement. After positioning the microphone in
contact with the water line he or she wished to monitor, the operator
activated the continuous measurement mode on the HL 5000
. He
or she then closed and, after a short time, re-opened the valve
supplying water to the line being monitored. In this case, the
graph shows that the leak sound disappeared when the valve was
closed and reappeared when the valve was opened again.
Fig 17: Continuous Memory Measurement Display
Pressing the ESC soft key will exit the continuous
measurement mode and return the user to the main screen.
3.10 Pipe Location Using the RSP-3 (HL5000 Professional)
Most of today s technology for locating non-metallic water lines
involves creating sound impulses on the water line itself and then
tracing the line by hearing those sounds with an acoustic listening
device like the HL 5000
. When in normal leak measurement
mode, the HL 5000
suppresses intermittent impulse sounds, but
when placed in Line Location Mode, it easily detects impulse sounds
(like those generated by Metrotech s RSP-3 Plastic Pipe Locator,
sold separately) and becomes a valuable tool for helping to locate
non-metallic lines.
