Battery Condition And Alarm - MSA ORION Manual

26
Oxygen alarm
The oxygen alarm sounds when:
• O
2
• O
2
Acknowledge the alarm by pressing Change/Reset. The alarm sounds every 10
seconds until O
To deal with O
• Pressure: wait for readings to stabilise.
• Humidity: no action required. The effect is gradual, over a period of hours.
• Temperature: zero the Orion in the new temperature.
Toxic gas alarm
The toxic gas alarm sounds when:
• CO concentration reaches 30 ppm,
• H
2
Acknowledge the alarm by pressing Change/Reset. The alarm sounds every 10
seconds until gas concentrations drop below the alarm concentration.
STEL and TWA alarms sound when toxic gas concentrations averaged over time
reach STEL or TWA levels. See
A.2: 'Time Weighted Average', on page
Acknowledge the alarm by pressing Change/Reset.
3.4.5

Battery condition and alarm

Full battery life is 10 hours (non-alarming). Battery condition is indicated by the
battery icon.
Segments within the icon disappear as battery life is used up. Each segment
represents 25% of battery life. When 20 minutes of nominal battery life remains, the
Orion will alarm and the battery icon will flash. Acknowledge the alarm by pressing
Change/Reset.
D.I. Recommended Practice
FILE: W:\NB\RP HMRU\Orion\Frame Ver 02\Orion.fm
levels drop below 19.5%
levels rise above 23.5%.
concentrations return to the 19.5% – 23.5% range.
2
NOTE
Changes in pressure, humidity and temperature will cause the
oxygen sensor readings to fluctuate.
sensor fluctuations:
2
S concentration reaches 10 ppm.
NOTE
The alarm will sound again if the condition continues.
Figure 11 Battery icon, showing half charge
A.1: 'Short Term Exposure Limit', on page
36, for details.
Version 02 Issued February 2011
© Copyright State of NSW (Fire and Rescue NSW) 2011
Four-Head Gas Detector: MSA Orion
35, and