MSA Altair - Understanding Alarms and Indicators

ConfidenceIndicator(see FIGURE 2-2)
The Confidence indicator flashes once every 60 seconds to notify the
user that the instrument is ON and operating normally. In addition, both
LEDs will flash briefly every 60 seconds.
AltairAlarms
ToxicGasMeasurements(see FIGURE 2-1)
The Altair Detector can be purchased to detect the following gases in
the atmosphere:
• Carbon Monoxide (CO) or
• Hydrogen Sulfide (H
2
S).
There are two alarm setpoints in the instrument.
1. If the gas concentration reaches or exceeds the low alarm setpoint:
• The instrument will:
• display and flash "LO" and "ALARM" on the LCD
• enter a low alarm sequence.
• The low alarm can be silenced for five seconds by pressing the
TEST button; it automatically clears once the gas level falls
below the setpoint.
2. If the gas concentration reaches or exceeds the high alarm
setpoint:
• The instrument will:
• display and flash "HI" and "ALARM" on the LCD
• enter a High alarm sequence.
• The high alarm can be silenced for five seconds by pressing
the TEST button; it automatically clears once the gas level falls
below the setpoint.
• Refer to the instrument during Test mode for
factory-set alarm setpoints.
• If a gas concentration exceeds an alarm setpoint, the:
• Audible alarm sounds
• Alarm lights flash
• Vibrator activates
• Alarm type displays, alternately flashing
the ALARM icon and the:
• LO icon (if the low alarm setpoint was exceeded)
• HI icon (if the high alarm setpoint was exceeded)
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