GX-2012 Operator’s Manual
Calibration Mode • 59
5. To adjust the values on the screens, hold down the (SHIFT)
button, then press the
DISPLAY(ADJ) button and release both. The %LEL sensor is shown here.
6. Use the AIR
and (SHIFT)
buttons to scroll through the sensors and select the
sensor whose calibration gas value you want to adjust.
7. Press and release the POWER ENTER button. The sensor’s calibration gas value will
flash.
8. If necessary, use the AIR
and (SHIFT)
buttons to set the correct calibration gas
value.
9. Press and release POWER ENTER button to save the change.
10. Repeat steps 6 through 9 to set the correct values for any additional sensors.
11. After the last calibration gas value is set, use the AIR
button to scroll to ESCAPE
and press POWER ENTER to return to the calibration gas values screens.
NOTE:
The RKI Four Gas Cylinder typically contains 12% O
2
by volume. Be sure to
set the “OXY” reading to agree with the concentration listed on the cylinder’s
label, not zero.
12. Use the AIR
or (SHIFT)
button to select which sensor(s) you want to calibrate,
the standard 4 sensors or the %volume combustible gas sensor.
The following instructions illustrate calibrating the standard 4 sensors first, then the
%volume combustible gas sensor.
13. With the 4-gas calibration values screen displayed, press the POWER ENTER button.
AUTO CAL begins to flash and the current gas readings are displayed. If you want to
exit back to the main menu without completing a calibration, press and release the
DISPLAY (ADJ) button.
14. Connect the tubing from the demand flow regulator to the rigid tube on the probe.
Allow the gas to flow for one minute.
- - -
%LEL
MAINTENANCE
CH
4
AUTO CAL
0
20.9
0
0.0
%LEL
%
ppm
ppm
MAINTENANCE
CH
4
O
2
AUTO CAL
CO
H
2
S
www.calcert.com
1.800.544.2843
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