152 • Calibrating the GX-2012
GX-2012 Operator’s Manual
3. Use the AIR
or (SHIFT)
button to alternate between the 4-gas and the % volume
combustible gas calibration values screens.
4. The gas concentrations displayed in the calibration values screen must match the gas
concentrations listed on the calibration cylinders. If
all
concentrations match, go to
step 12. If
one or more
concentrations do not match, continue with step 5.
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.
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 the 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.
50
12.0
50
25.0
%LEL
%
ppm
ppm
MAINTENANCE
CH
4
O
2
AUTO CAL
CO
H
2
S
100
vol%
MAINTENANCE
CH
4
AUTO CAL
- - -
%LEL
MAINTENANCE
CH
4
AUTO CAL
www.calcert.com
1.800.544.2843
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