
Insert batteries into the sensor
C
Note
• Donotmixbatteries(oldandneworcarbonandalkaline,etc.).
Before using the sensor,
1 turn the screw anticlockwise to unlock the battery
compartment.
2 insert2AAbatteries(notsupplied)withcorrectpolarity
(+/-)asindicated.
3 turn the screw clockwise to lock the battery compartment.
Replace battery of the main unit
D
Note
• You can only use AC power as power supply. The pre-installed
CR2032 battery can only back up clock and alarm settings.
When the low battery icon is displayed, replace the battery as
indicated.
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