RKI Instruments GX-2012 Manual - Manual (Page 99)

GX-2012 Operator’s Manual Leak Testing • 91
Leak Testing
In Leak Check Mode, the GX-2012 only displays combustible gas readings.
The increment of the reading is always 100 ppm but the display range can be
adjusted by using the DISPLAY (ADJ) button. The display range choices are
500 ppm, 1000 ppm, 2000 ppm, and 5000 ppm. The readings are displayed in
both numerical and bar graph form. As the gas concentration increases from
0 ppm, the alarm LEDs begin to blink in unison with the buzzer’s pulsing.
The blinking/pulsing rate increases as the gas reading increases. If desired the
buzzer can be turned off in Leak Check Mode.
In a low-light environment, press and release any of the buttons to turn on the
display backlight. If BEEP. SET is turned on in Maintenance Mode, the GX-
2012 beeps once every 5 minutes to confirm that it’s operating.
Setting the Display Range Value
The GX-2012 Leak Check Mode has 4 display range ppm values to choose
from: 500 ppm, 1000 ppm, 2000 ppm, and 5000 ppm.
NOTE: The GX-2012 is always detecting combustible gas up to 5000 ppm.
The display range value is only adjusting what part of the detection
range is displayed on the LCD.
To change the display range value:
1. While in Leak Check Mode, press and release the DISPLAY (ADJ)
button. The display range value displayed along the bottom of the screen
will change.
Continue to press and release the DISPLAY (ADJ) button until the desired
display range value is displayed.
2. The unit is now operating with the selected display range.
Locating a Leak
1. Start up the GX-2012 as described above in “Turning On the GX-2012,
Leak Check Mode” on page 84.
0
500
ppm
ppm
LEAK CK MODE
CH
4
F.S.