MSA Orion G Mode D'emploi page 51

Chapter 5, Calibration
10 seconds, the instrument returns to the
Measure mode.
• Once the zeros are set, CAL flag flashes (FIGURE 5-3).
4. Connect the appropriate calibration gas to the instrument.
5. (FIGURE 5-4):
a) Connect one end of tubing to instrument inlet fitting.
b) Connect other end of tubing to the cylinder regulator
(supplied in the calibration kit).
6. Open the valve on the regulator.
7. Push the ON-OFF/PAGE button to calibrate (span) the instrument.
The oxygen, CO, H
0 to 5% CH range are calibrated.
4
• CAL flag stops flashing and remains ON.
• Instrument cycles through the gases one-at-a-time for
approximately 90 seconds.
• If autocalibration sequence passes, the instrument
proceeds to the 6 to 100% CH
NOTE: To skip calibration and move to the 6 to 100% CH
calibration page, push the CHANGE/RESET button.
If no button is pushed for 10 seconds, the instrument
returns to the Measure mode.
Calibration of 100% CH
NOTE: Utility-supplied natural gas is recommended for the
calibration. If this is not available, technical grade
methane in the range of 95 to 100% CH
711014) can be used. The flow rate from the
regulator must be 0.25 LPM.
• Move calibration sample to the source of line gas.
• Push the ON/OFF Page button to calibrate (span)
the 6 to 100% CH
• The CAL flag stops flashing and remains ON.
• If autocalibration of 6 to 100% CH
successful, instrument returns to Measure mode.
NOTE: To skip calibration of the 6 to 100% CH
return to the Measure Mode, push the
CHANGE/RESET button. If no button is pushed for
10 seconds, instrument returns to Measure mode.
5-4
S (if installed) and the 0 to 100% LEL or
2
calibration page.
4
Range
4
combustible range.
4
Operating Manual
4
in N (P/N
4 2
range is
4
range and
4