RKI Instruments GX-2012 Manual - Manual (Page 100)

92 • Leak Testing GX-2012 Operator’s Manual
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
CH
4
OVER