Measuring Gas Concentrations - MSA Orion G Manual De Operaciones

Chapter 3, Using the Orion G Gas Utility Instrument
• The reading on the Orion G Multigas and Leak Detector
display should be within the limits stated on the calibration
cylinder or limits determined by your company.
• If necessary, change the cylinder to introduce other
calibration gases.

Measuring Gas Concentrations

Combustible
gases (% LEL or
%CH ) (FIGURE
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3-5)
The Orion G Multigas
and Leak Detector can
be equipped to detect
combustible gases in
the atmosphere.
• Alarms sound when
concentrations reach
the Alarm Setpoint.
• When the
combustible gas
indication reaches
the Alarm Setpoint:
• Alarm sounds
• Alarm lights flash
• % LEL or %CH
• To silence the alarm, press the CHANGE/RESET button.
NOTE: The alarm will stay silent if the alarm condition
has cleared.
• When the combustible gas indication reaches 100% LEL or
5% CH , the instrument will auto-range into the 6 to 100% CH
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range. The instrument will auto-range to the 6 to 100% CH
range regardless of whether the lower range is 0 to 100% LEL
or 0 to 5% CH .
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NOTE: There may be a short delay while the instrument
changes ranges.
3-8
Figure 3-5. Instrument in LEL Alarm
label above the concentration flashes.
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Operating Manual
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