Gas Tracer Operator’s Manual, CSA Version
Bar Hole Testing • 93
4. Continue to hold the AIR
▲
button until the display prompts you to release the
AIR
▲
button. The Gas Tracer will set the fresh air reading for the CH
4
and
oxygen channels as it counts down from 8. Once the countdown has finished,
start up is complete and the unit is ready for bar hole testing.
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 155. 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 Gas Tracer after a sample is taken.
In a low-light environment, press and release the (SHIFT)
▼
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 152 to program backlight
duration. If BEEP. SET is turned on in the Maintenance Mode menu, the Gas
Tracer 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)
▼
button and DISPLAY (ADJ) button and releasing when
you hear a beep.
Performing a Bar Hole Test
1. Start up the Gas Tracer as described in “Start Up, Bar Hole Mode” on page 87.
2. If you wish to change the station ID, press the (SHIFT)
▼
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 change, press and release the RESET SILENCE
button.
S Id
001
SEL
