Peak Readings (Maximum) - MSA Orion plus Mode D'emploi

Peak Readings (MAXIMUM)

• The Maximum flag appears in the upper portion of the display to
show the highest levels of gas recorded by the Orion plus Multigas
Detector since:
• Turn-ON
• Short Term Exposure Limits (STEL)
• The STEL flag appears in the upper portion of the display
to show the average exposure over a 15-minute period.
• When the amount of gas detected by the Orion plus Multigas
Detector is greater than the STEL limit, the:
• Alarm sounds and Alarm lights flash
• STEL flag flashes.
• The STEL alarm is calculated over a 15-minute exposure.
Calculation examples are as follows:
Assume the Orion plus Multigas Detector has been running for at least 15
minutes.
• 10-minute exposure of 35 PPM
5-minute exposure of 5 PPM:
(10 minutes x 35 PPM) + (5 minutes x 5 PPM)
Assume the Orion plus Multigas Detector was turned on five minutes ago.
• 5-minute exposure of 15 PPM:
(5 minutes x 15 PPM) + (10 minutes x 0 PPM)
15 minutes
15 minutes
= 25 PPM
= 5 PPM
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