RKI Instruments GX-2012 Manual - Manual (Page 72)

64 • Calibration Mode GX-2012 Operator’s Manual
of the full scale value of the target gas. For example, if you are calibrating the
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
navigate 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