RKI Instruments GX-2012 Manual - Manual (Page 101)

GX-2012 Operator’s Manual Leak Testing • 93
• 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
CH
4
OVER