GX-2012 Operator’s Manual
Calibration Mode • 57
3. With the unit on, perform a fresh air adjustment by pressing and holding the AIR
button. The display prompts you to hold the AIR
button.
4. Continue to hold the AIR
button until the display prompts you to release it. The
GX-2012 will set the fresh air reading for all channels as it counts down from 8. If the
combustible channel is set as %LEL only or vol% only, there is no countdown period.
The fresh air reading is set immediately.
5. Install the demand flow regulator onto the calibration cylinder.
6. Connect the sample tubing to the demand flow regulator.
Calibrating the GX-2012
From Measuring Mode, enter Calibration Mode by pressing and holding the (SHIFT)
button, then pressing the DISPLAY(ADJ) button and releasing both. If the unit prompts
you for the password, enter it by using the AIR
and (SHIFT)
buttons to select each
password number and then pressing and releasing POWER ENTER to confirm it and
move on to the next number. To go back a number, press and release the RESET
SILENCE button. The factory set password is the same as the factory set password for
Maintenance Mode: 2102. You can change the password by entering the
PASSWORD
menu item in Maintenance Mode. See “Turning the Password Function On or Off” on
page 128. If you enter an incorrect password, an error screen will display.
To return to normal operation, press and release the RESET SILENCE button. You may
then try to reenter Calibration Mode.
MAINTENANCE will appear along the top of the screen once you have entered
Calibration Mode. The first item in the calibration menu, AIR CAL, displays.
NOTE:
The following screens illustrate a four-gas GX-2012 with both a %LEL and a
%volume combustible gas sensor as examples only. Your GX-2012 may display
slightly different screens.
The GX-2012’s calibration menu includes two methods of calibration:
auto calibration and single calibration.
Err
PASSWORD
MAINTENANCE
AIR CAL
www.calcert.com
1.800.544.2843
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