General Tools and Instruments NGD8800 - Manual (Page 11)

COMBUSTIBLE GAS DETECTOR
10
z How to Find Leaks
NOTE: A sudden whipping of the leak detector probe or
"blowing" into the sensor tip will affect the air flow over
the sensor and cause the instrument to alarm.
(1) Power-Up & Reset function key:
The key turns the combustible leak detector
instrument ON or OFF and is also the reset function.
Press it once to turn on the combustible leak detector.
The display will illuminate with flash, for 1.5 minutes to
heat up the sensor.
Press it again to reset the ambient base concentration.
Press and hold this button for 5 seconds to turn OFF the
power.
(2) Verify the condition of the unit and sensor:
ƒ Monthly testing of unit is recommended using the
included reference leak source or when even it is
suspected that the reading is not correct.
ƒ Set the sensitivity level to “Hi”.
ƒ Open the leak check bottle cover and slowly move it
closer to sensor.
ƒ If the indication moves up to high from low then you
should move the check bottle away and the LED
should go off again. This shows that the unit is under
working condition.
ƒ If the unit does not perform as expected, bring the
unit for maintenance at your local sales office.