How to reset the external sensor of the OREGON SCIENTIFIC Jumbo JW108 clock after changing the batteries?

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After changing the batteries of the external sensor of your OREGON SCIENTIFIC Jumbo JW108 clock, you need to reset it and synchronize it with the main unit. Here is the complete procedure to follow.

Step 1: Check the batteries

Make sure to use new and functional AAA batteries (2 batteries for the sensor)
Strictly follow the indicated polarity (+/-) when installing
Prefer alkaline batteries for prolonged use, or good quality lithium batteries in cold temperatures

Step 2: Reset the sensor

Remove the batteries from the external sensor compartment
Wait 10 to 15 minutes to allow for a complete reset of the sensor
Reinsert the new batteries while respecting the polarity (+/-)
Close the battery compartment of the sensor

Step 3: Synchronize the sensor with the clock

Place the external sensor within 30 meters of the main unit, using the provided wall mount
On the main clock, press and hold the SENSOR button to start searching for the sensor
The sensor reception icon will indicate if a channel has been found
Once the sensor is detected, press the SENSOR button again to stop the search

Important tips for the best reception

Place the sensor outside the house, at a height of more than 1.5 meters
Protect it from direct sunlight and excessive moisture for accurate readings
Avoid thick obstacles (concrete walls, metal structures) between the sensor and the main unit, which reduce range
If synchronization fails, try several locations for the best results

If despite these steps the sensor does not synchronize with the main unit, check that the batteries are indeed new, wait a few more minutes, and then restart the search. A persistent hardware issue would require contacting Oregon Scientific technical support.

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