Imperial LD920 User Manual Download Page 4

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.)

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Summary of Contents for LD920

Page 1: ...H2 N2 Tracer Gas Leak Detector Detects 5 H2 in 95 Nitrogen Tracer Gas LD920 User Manual Made in U S A LeakDetectors LD920 UserManual indd 1 12 7 16 2 26 PM...

Page 2: ...m The 5 H2 95 N2 Tracer Gas mixture is consistent with the teaching of EMC Directive 2014 30 EU for use with Low GWP Leak Detection System Tracer Gas The LD920 does not require rechargeable batteries...

Page 3: ...n 9 5 mm and no faster than 3 in sec 75 mm sec If the detector alarms make smaller sweeps back and forth until the leak source can be pin pointed NOTE The LD920 only responds to changes in leak concen...

Page 4: ...oximate 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 r...

Page 5: ...xpose the vent hole in the top of the screw cap see fig below 2 Turn on the leak detector and allow the instrument to complete the warm up cycle 3 Place the sensor close to the small hole in the top o...

Page 6: ...th the raised keyway on sensor socket holder see figure below Note Do not force sensor into socket Misalignment can damage the sensor pins IMPORTANT The instrument s software is designed to alert the...

Page 7: ...eted The 5 H2 95 N2 Tracer Gas mixture is consistent with the teaching of EMC Directive 2014 30 EU for use with Low GWP Leak Detection System Tracer Gas The LD920 detects the Hydrogen component of the...

Page 8: ...ls should be returned to the buyer s place of purchase SERVICE TECHNICAL QUESTIONS CALL TOLL FREE 888 467 8665 30333 Emerald Valley Pkwy Glenwillow Ohio 44139 888 467 8665 REPLACEMENT PARTS Item Part...

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