GX-2012 Operator’s Manual
Using Maintenance Mode • 117
button to save it. The value will stop blinking.
4. To update the bump test tolerance, use the (SHIFT)
button to scroll to the CHECK
value. The factory setting is 30%. This is the bump test tolerance value and is
represented as a percentage. It is the percentage that the bump test reading can differ
from the actual gas concentration. If the bump test reading differs more, the bump test
will fail. With the cursor next to the check value and CHECK displayed along the
bottom of the screen, press and release POWER ENTER. The value will begin to
flash. Use the AIR
or (SHIFT)
buttons to select a new threshold value. The
available values are 10, 20, 30, 40, and 50. Once a value is selected, press and release
the POWER ENTER button to save it. The value will stop blinking.
5. To update the CAL TIME setting, use the (SHIFT)
button to scroll to the CAL
TIME value. The factory setting is 90 seconds. This is the length of time the
instrument will remain exposed to calibration gas after a failed bump test if AUTO
CAL is set to On. The bump test time is deducted from the calibration time. For
example, if the CAL TIME is set to 90 seconds and the GAS TIME is set to 30
seconds, if the bump test fails, the GX-2012 will only be exposed to gas for an
additional 60 seconds. With the cursor next to the cal time value and CAL TIME
displayed along the bottom of the screen, press and release the POWER ENTER
button. The value will begin to flash. Use the AIR
or (SHIFT)
buttons to select a
new cal time value. The choices are 90 and 120 seconds. Once a value is selected,
press and release the POWER ENTER button to save it. The value will stop blinking.
6. To update the AUTO CAL setting, use the (SHIFT)
button to scroll to the AUTO
CAL value. The factory setting is ON. With AUTO CAL set to ON, if a bump test
fails, the unit will automatically begin a calibration. If AUTO CAL is set to OFF and
a bump test fails, nothing will happen. With the cursor next to the auto cal selection
and AUTO CAL displayed along the bottom of the screen, press and release the
POWER ENTER button. The value will begin to flash. Use the AIR
or (SHIFT)
buttons to select ON or OFF. Once a selection is made, press and release the POWER
ENTER button to save it. The value will stop blinking.
7. To exit the
BUMP--SET
menu, use the (SHIFT)
button to scroll to ESCAPE and
press and release the POWER ENTER button.
Updating the Confirmation Beep Setting
With
BEEP. SET
set to ON, the GX-2012 beeps once every 5 minutes to verify that it is
operating.
With
BEEP. SET
set to OFF (factory setting), the GX-2012 does not sound a confirmation
beep.
1. Use the AIR
or (SHIFT)
buttons to display the
BEEP. SET
menu item. Press and
release the POWER ENTER button. The screen will indicate the current setting.
2. Use the AIR
or (SHIFT)
button to display the desired setting.
On
MAINTENANCE
BEEP. SET
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