RKI Instruments GX-2012 Manual - Manual (Page 136)

128 • Using Maintenance Mode GX-2012 Operator’s Manual
3. To update the GAS TIME setting, with the cursor next to the gas time and
with GAS TIME displayed along the bottom of the screen, press POWER
ENTER. The factory setting is 30 seconds. The value will begin to flash.
Use the AIRS or (SHIFT)T buttons to select a new gas time. The GAS
TIME is the amount of time that the instrument is exposed to gas during a
bump test. The time increments are 30, 45, 60, and 90 seconds. Once a
value is selected, press and release the POWER ENTER button to save it.
The value will stop blinking.
4. To update the bump test tolerance, use the (SHIFT)T 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 AIRS or (SHIFT)T 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)T 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 AIRS or
(SHIFT)T 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)T 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 AIRS or (SHIFT)T
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.