RKI Instruments GX-2012 Manual - Manual (Page 173)

GX-2012 Operator’s Manual Calibrating the GX-2012 • 165
The GX-2012’s calibration menu includes two methods of calibration:
auto calibration and single calibration.
• Auto Calibration: This method allows you to calibrate the combustible
gas (%LEL sensor only), OXY, H
2
S, and CO sensors simultaneously. It is
designed for use with the RKI 4-gas calibration cylinder and is the
quickest and easiest method to calibrate the GX-2012. If installed, you
may also calibrate the %volume sensor separately from the standard four.
• Single Calibration: This method allows you to calibrate one sensor at a
time. Use this method if you are only calibrating one or two sensors, if
you are calibrating only the %volume combustible sensor, or if you are
not using the RKI 4-gas calibration cylinder.
Calibrating with the Auto Calibration Method
This section describes calibration using the auto calibration method.
To calibrate using the single calibration method, see “Calibrating with the
Single Calibration Method” on page 168. 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. 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.
2. Use the AIRS and (SHIFT)T buttons to scroll to 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.