MAINTENANCE
6-3
6.2 Sensor Replacement
The toxic, combustible and oxygen sensors all have an
expected operating life. Under normal operating condition,
most sensors will lose their original sensitivity after the
expected operating life and will need to be replaced.
Each sensor module in AreaRAE-Gamma includes a non-
volatile memory, which records the manufacturing date of the
sensor. In the diagnostic mode, the microprocessor will check
the date code and display the expiration date of each sensor. It
is suggested that the user should replace the sensor when the
current date exceeds the expiration date of a sensor.
Sensor Replacement Procedure
The oxygen and combustible sensor each has their unique
sensor sockets in the AreaRAE-Gamma monitor. The toxic
sensor socket in the AreaRAE-Gamma monitor allows the user
to plug in any sensor selected from the series of toxic sensors
offered by RAE Systems Inc.
1. Turn AreaRAE-Gamma off.
2. Remove the battery pack. (See Section 3.2
Interchangeable Battery Packs)
3. Open the monitor by removing the four Allen screws that
holds the front and back housing together:
