GX-2012 Operator’s Manual Calibration Mode • 65
5. Connect the tubing from the demand flow regulator to the rigid tube on
the probe. Allow the calibration gas to flow for one minute.
6. If necessary, use the AIRS and (SHIFT)T buttons to adjust the reading
to match the concentration listed on the calibration cylinder.
If the reading already matches the concentration listed on the calibration
cylinder, press and release the AIRS button then press and release the
(SHIFT)T button so that the instrument sees a change and resets the
calibration date.
7. Press and release the POWER ENTER button to save the span value. The
LCD will indicate that the calibration has ended, then the single
calibration menu displays.
8. Disconnect the tubing from the probe.
9. Repeat steps 3 through 8 for any other sensors you want to calibrate.
Make sure you use an appropriate calibration cylinder for each sensor.
CAUTION: When calibrating the oxygen channel, verify the concentration
of oxygen listed on the cylinder’s label. For oxygen-free samples
(100% nitrogen for example), set the oxygen zero setting to
0.0%.
10. After the last channel is calibrated, disconnect the calibration tubing from
the probe, then unscrew the demand flow regulator from the calibration
cylinder.
11. Use the AIRS and (SHIFT)T buttons to scroll to ESCAPE in the ONE
CAL menu.
12. Press and release the POWER ENTER button to exit ONE CAL.
13. With the ONE CAL menu option displayed, press the (SHIFT)T button
until the NORMAL menu option is displayed.
14. Press and release the POWER ENTER button to return to Measuring
Mode.
- - -
%LEL
MAINTENANCE
CH4
ONE CAL
To Next Page
Loading...
