RKI Instruments GX-2003 Manual - Manual (Page 57)

GX-2003 Operator’s Manual Leak Testing • 50
Leak Testing
In Leak Check Mode, the GX-2003 only displays combustible gas
readings, and the readings are displayed in 100 ppm increments up
5,000 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. See “Updating the LCD Back Light
Time Setting” on page 65 to program backlight duration. If
CONFIRMATION BEEP is turned on in the Setup Mode menu, the
GX-2003 beeps once every 15 minutes to confirm that it’s operating.
Locating a Leak
1. Start up the GX-2003 as described above in “Start Up, Leak Check
Mode” on page 46.
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
to the right, and the beeping and buzzer pulsing frequency will
increase.
4. Use the increasing and decreasing of the reading to locate the leak
point.
5. To exit Leak Check Mode and return to the Mode Select Screen at
any time, press and hold the (SHIFT)▼ button for 5 seconds.
Turning the Buzzer On and Off in Leak Check Mode
The alarm buzzer can be turned off and on when the GX-2003 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. The
buzzer setting is displayed in the lower left corner as BZ ON when
the buzzer is on or BZ OFF when the buzzer is off. When the GX-2003
is turned on, the buzzer is always set to BZ ON in Leak Check Mode.
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 unless it is manually turned on or the unit is turned off
and on again.