Sensor Missing Alarm; Monitoring Toxic Gases - MSA ALTAIR 5X Manuel D'utilisation

Motion Alert Activation Page
When the MotionAlert feature is active, the
motion is detected for 20 seconds. This condition can be cleared by moving the device. MotionAlert is
turned OFF each time the device is powered OFF. After 30 seconds of no motion, the full MotionAlert
alarm is triggered. This alarm can only be cleared by pressing the  button. This page displays if it
was selected in Setup Mode. To activate or deactivate the MotionAlert feature, press the  button
while the MOTIONALERT ACTIVATION page is displayed.
2.6

Sensor Missing Alarm

Enabled IR and XCell sensors are continuously monitored for proper function. If, during operation, the
IR or an XCell sensor is detected as failed or disconnected, this alarm message appears.
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"SENSOR MISSING" flashes on the display.
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The problematic sensor is indicated.
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The alarm sounds and the Fault and Alarm LEDs flash.
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The alarm can be silenced by pressing the  button; no other pages can be viewed.
When this alarm occurs, the device is inoperative for measuring gases. The user must exit the
hazardous area, the device must be powered down, and the sensor situation must be corrected.
2.7

Monitoring Toxic Gases

The device can monitor the concentration of a variety of toxic gases in ambient air. Which toxic gases
are monitored depends on the installed sensors.
The device displays the gas concentration in parts per million (ppm), μmol/mol or mg/m
uring page. Gas units are selected in the SETUP - INSTRUMENT OPTIONS page.
If an alarm is triggered while using the device, leave the area immediately.
Remaining in the area under such circumstances can cause serious personal injury or death.
The device has four gas alarms:
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HIGH Alarm
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LOW Alarm
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STEL Alarm
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TWA Alarm
Fig. 6 Alarm Conditions (here High Alarm)
If the gas concentration reaches or exceeds the alarm set point or the STEL or TWA limits, the:
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alarm message displays and flashes in combination with the corresponding gas concentration
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backlight turns on
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alarm sounds (if active)
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alarm LEDs flash (if active)
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vibrating alarm triggers (if active)
+ symbol appears. The device enters pre-alarm when no
WARNING
WARNING
ALTAIR 5X/ALTAIR 5X IR
Description
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on the Meas-
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