41
Operation
ALTAIR io360
US
6.2
Sensor Alarms
If the gas concentration reaches or exceeds the alarm set point, the detector will alarm.
There are two alarm levels: low alarm and high alarm.
6.2.1
Sensor Missing Alarm
The detector alerts the Sensor Missing alarm if the detector detects that the sensor is not properly installed
in the detector or is not functional. During power on, if a sensor is detected as missing, the detector display
prompts the user of "Sensor Change?". If sensor was intended to be removed, press the detector button to
acknowledge the missing sensor. If the detector button is not pressed at when prompted the detector will
enter Fault state 20. The Sensor Change can be acknowledged but restarting and pressing the detector
button when prompted.
6.2.2
Sensor End of Life Warning
If a sensor is nearing its end of life, the detector will warn the user following a sensor calibration by displaying
the heart warning. The sensor is still functional, but the warning gives the user time to plan for a replacement
sensor and minimize downtime. The heart symbol will be continuously displayed on the detector display. To
determine which sensor is End of Life, press the detector button to advance gas reading until the second
heart is displayed on that display screen as shown below.
6.2.3
Sensor End of Life Indicator
If the detector cannot calibrate one or more sensors, the detector will display "Span Fail" followed by the
Alarm symbol and heart symbol to indicate end of sensor life.
Failed calibration displays as alarm bell ringing.
Reminder: The detector must be calibrated every time the front housing is separated from the
battery holder.
