RKI Instruments GX-2012 Manual - Manual (Page 177)

GX-2012 Operator’s Manual Calibrating the GX-2012 • 169
combustible gas channel, your calibration cylinder should have a
combustible gas concentration between 10% LEL and 50% LEL. For the
oxygen channel, RKI Instruments, Inc. recommends using 100% nitrogen to
perform the adjustment but any concentration between 0% oxygen (100%
nitrogen) and 17% oxygen can be used to make the adjustment.
NOTE: If your combustible gas channel is calibrated to a gas other than
methane, use an appropriate gas cylinder to perform the calibration.
CAUTION: The single calibration method does not have a “FAIL”
notification. If a sensor cannot be set to agree with the
calibration source, see “Troubleshooting” on page 143.
1. While in the calibration menu, use the AIRS or (SHIFT)T button to the
ONE CAL menu option.
2. Press and release the POWER ENTER button to display the single
calibration menu. The %LEL sensor will be displayed first.
MAINTENANCE
ONE CAL
- - -
%LEL
MAINTENANCE
CH
4
ONE CAL