92 • Leak Testing GX-2012 Operator’s Manual
• Exceeding 100% LEL
If the combustible gas level exceeds 100% LEL, the GX-2012 will
display an overscale alarm.
NOTE: If a vol% sensor is installed, “OVER” will still appear at the bottom
of the screen but the instrument will display the gas reading in
%volume.
The GX-2012 will continue to be in overscale alarm until the gas
reading decreases. The instrument will then show readings in the
LEL range until the readings decrease back to the ppm range.
Turning the Alarm On and Off in Leak Check Mode
The alarm buzzer can be turned off and on when the GX-2012 is in
Leak Check Mode. This setting only applies to Leak Check Mode and
does not affect buzzer operation in Normal or Bar Hole Mode. When
the buzzer is set to Off, NO ALARM appears in the upper left hand
corner of the display. If the buzzer is turned off, then it will remain off
in Leak Check Mode even if you enter Normal Mode or Bar Hole
Mode and return to Leak Check Mode or turn the unit off and on
unless the buzzer is manually turned on.
To turn the buzzer off or on while in Leak Check Mode:
1. Press and hold the DISPLAY(ADJ) button for 5 seconds.
NOTE: Pressing and holding the DISPLAY (ADJ) button will change
the full scale setting for Leak Check Mode. Once you have
made your buzzer selection, use the DISPLAY (ADJ) button to
display the desired full scale.
2. Release the button when NO ALARM in the upper left corner
appears or disappears.
5000
%LEL
ppm
LEAK CK MODE
CH4
OVER
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