RKI Instruments GX-2012 Manual - Manual (Page 88)

80 • Bar Hole Testing GX-2012 Operator’s Manual
Bar Hole Testing
In Bar Hole Mode, the you can initiate sampling for a fixed time period to
monitor for methane and oxygen in a bar hole. The factory set time is 30
seconds. To change the bar hole sampling time, see “Updating the Bar Hole
Sampling Time” on page 138. At the end of the sample period, the pump will
shut off and the peak methane and minimum oxygen levels monitored during
the sample period will be displayed. Bar Hole Mode also allows you to
initiate an air purge cycle to purge gas from the GX-2012 after a sample is
taken.
In a low-light environment, press and release the (SHIFT)T button to turn on
the display backlight. Although the backlight will turn on when any button is
pressed, other buttons may initiate an undesired operation sequence. See
“Updating the LCD Back Light Time Setting” on page 135 to program
backlight duration. If BEEP. SET is turned on in the Maintenance Mode
menu, the GX-2012 beeps once every 5 minutes to confirm that it’s
operating.
While in Bar Hole Mode, you may select or change the current station ID by
pressing the (SHIFT)T button and DISPLAY (ADJ) button and releasing
when you hear a beep.
Performing a Bar Hole Test
1. Start up the GX-2012 as described in “Start Up, Bar Hole Mode” on
page 73.
2. If you wish to change the station ID, press the (SHIFT)T and DISPLAY
(ADJ) buttons and release when you hear a beep. The current station ID
will be displayed and it will be flashing. If you wish to exit the Station ID
Select Screen without making any changes, press and release the RESET
SILENCE button.
S Id
001
SEL