GX-2012 Operator’s Manual Leak Testing • 91
Locating a Leak
1. Start up the GX-2012 as described above in “Turning On the GX-
2012, Leak Check Mode” on page 83.
2. Move the probe tip or tapered nozzle tip back and forth along the
area where a leak is suspected.
3. Observe the display reading. If the gas level increases, the
numerical reading will increase, the bar graph level will increase,
and the beeping and buzzer pulsing frequency will increase.
4. Your gas reading may exceed your display range or 100% LEL. For
a description of both scenarios, see the following section.
5. Use the increasing and decreasing of the reading to locate the leak
point.
6. To exit Leak Check Mode and return to the Leak Check Mode
Select Screen at any time, press and hold the (SHIFT)T button for 5
seconds.
Overscale Conditions
There are three overscale conditions that the GX-2012 may experience
while operating in Leak Check Mode.
• Exceeding display range
If you are using a display range of 500, 1000, or 2000 ppm and the
gas level goes above the display range, the full scale value of the
display range will be displayed but it will not be an overscale
condition unless the gas level is above 5000 ppm.
• Exceeding 5000 ppm
If the combustible gas level exceeds 5000 ppm, the GX-2012 will
display an overscale condition but will continue displaying the gas
reading in %LEL.
32
5000
%LEL
ppm
LEAK CK MODE
CH4
OVER
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