RKI Instruments GX-2012 Manual - Manual (Page 70)

62 • Calibration Mode GX-2012 Operator’s Manual
sensors.
11. After the last calibration gas value is set, use the AIRS 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 AIRS or (SHIFT)T 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.
15. Press and release the POWER ENTER button to set the calibration to the
programmed values.
If all channels passed calibration, PASS displays along the bottom of the
screen, then the calibration menu displays.
0
20.9
0
0.0
%LEL
%
ppm
ppm
MAINTENANCE
CH
4
O
2
AUTO CAL
CO
H
2
S