RKI Instruments GX-2003 Manual - Manual (Page 41)

GX-2003 Operator’s Manual Calibration Mode • 34
NOTE: The following screens illustrate a four-gas GX-2003 with both
a % LEL and a % volume combustible sensor as examples
only. Your GX-2003 may display slightly different screens.
The GX-2003’s calibration menu includes two methods of calibration:
auto calibration and single calibration.
• Auto Calibration: This method allows you to calibrate the CH
4
(%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-2003.
• 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 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 36.
1. With the cursor next to the AUTO CALIBRATION menu item,
press and release the POWER ENTER button to display the
calibration values screen.
The gas concentrations displayed in the calibration values screen must
match the gas concentrations listed on the 4-gas calibration cylinder. If
all concentrations match, go to step 6. If one or more concentrations do
not match, continue with step 2.
2. To adjust the values on the screen, hold down the (SHIFT)▼
button, then press the DISPLAY(ADJ) button and release both. The
CH
4
calibration value begins to flash.
>AUTO CALIBRATION
SINGLE CALIBRATION
CONTRAST
NORMAL OPERATION
21:09
C CH4 50%LEL
A OXY 12.0VOL%
L H2S 25.0ppm
. CO 50ppm
21:09