MSA Orion G Mode D'emploi page 53

Chapter 5, Calibration
• all appropriate sensors are installed and in their correct location
• the calibration setup is correct and verify that:
• all connections are secure
• the proper gas regulator and cylinder are being used.
NOTE: This section applies to calibration of both the
Measure mode sensors (Oxygen, CO, H
0 to 100% LEL / 0 to 5% CH
CH calibration sequence.
4
If the setup is correct, it may be necessary to calibrate the
instrument using the Expanded Tolerance Calibration window.
From the Autocalibration Failure page:
1. Do NOT push the CHANGE/RESET button.
• The CAL flag continues to display.
2. Do NOT remove the calibration gas; it must continue to flow
from the initial calibration attempt.
3. Press and hold the ON-OFF/PAGE button for approximately
three seconds.
• The hourglass displays until the CHANGE flag appears on
the display.
4. Release the ON-OFF/PAGE button.
• The instrument takes approximately 10 seconds to
calibrate using the Expanded Tolerance Calibration
window.
• If the calibration is successful, the instrument returns to
the Measure page.
• If the calibration is not successful, the Autocalibration
Failure page displays again. The above procedure can be
repeated indefinitely but is not likely to yield a successful
calibration. Before proceeding, check the following:
• Cylinder type -
Ensure that the values on the cylinder match the
Autocalibration values programmed into the Orion G.
• Cylinder pressure -
Ensure that the cylinder is not empty.
• Pressure regulator -
Ensure that the pressure regulator has a flow of
5-6
Operating Manual
S and
2
) and to the 6 to 100%
4