![Imperial LD920 User Manual Download Page 4](http://html1.mh-extra.com/html/imperial/ld920/ld920_user-manual_2048879004.webp)
LEAK SIZE INDICATOR
The digital leak size indicator remains off normally but once a leak is detected,
a number from 1-9 will be displayed for all H2/N2 tracer gas regardless of the
sensitivity setting.
The number will continue to increase or decrease depending on the amount of
tracer gas sensed. The maximum value will be displayed once the leak source has
been located. The table below can be used to approximate the size of leak:
Maximum #
Approx. Leak Size
Approx. Leak Size
Displayed
(oz/yr)
(g/yr)
1 -3
< 0.1
<3
4-6
0.1 to 0.5
3 to 14
7-9 > 0.5
>14
LOW BATTERY INDICATOR
Replace the 4 AA Alkaline batteries when the red LED on the control panel is lit.
Follow battery installation instructions under
Maintenance
section.
AUDIO MUTE FUNCTION
To silence or mute the audio beep and alarm signal, press the MUTE button.
To restore the audio sound, press the MUTE button again. (Note: a few seconds
is required to restore sound if the mute button is pressed in rapid succession.)
4
LeakDetectors-LD920-UserManual.indd 4
12/7/16 2:26 PM