RKI Instruments GX-2012 Manual - Manual (Page 113)

GX-2012 Operator’s Manual Using Maintenance Mode • 105
Calibrating Using Auto Calibration
If CL EXPRD is set to NOT USE and calibration becomes due, then the unit
must be calibrated using this menu item and/or the next menu item, ONE
CAL, because it will not be possible to enter normal operation. See
“Calibration/Bump Test Supplies and Equipment” on page 57 for the items
you will need to perform a calibration. These instructions assume you are
using a 4-gas cylinder and a %volume methane cylinder.
NOTE: If the combustible gas channel(s) are calibrated to a gas other than
methane, use an appropriate multigas cylinder or use single
calibration to calibrate the combustible channel(s).
1. Perform a fresh air adjust. See previous section for instructions.
2. Install the demand flow regulator onto the calibration cylinder.
3. Connect the sample tubing to the demand flow regulator.
4. Install the hose and probe to the GX-2012.
5. You may only calibrate either the standard 4 sensors or the % volume
combustible gas sensor at a time. Once you are finished, you are returned
to the initial AUTO CAL screen and must begin the auto calibration
process again.
6. Use the AIRS or (SHIFT)T buttons to display the AUTO CAL menu
item. Press and release the POWER ENTER button to display the
calibration values screen. If you want to exit back to the main menu
without completing a calibration, press and release the DISPLAY (ADJ)
button.