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S+D Sensor Battery Life and Replacement
The batteries in the S+D Sensor will last approximately 12 hours.
The S+D Sensor itself does not indicate the condition of its
batteries, except if the batteries are completely exhausted (as
noted in the section “Operating the S+D Sensor”). Instead, this
information is broadcast to your watch along with your perform-
ance data. Refer to the user manual for your watch for the proce-
dure to check the S+D Sensor’s battery level.
Replace batteries
• Remove the back cover of the S+D Sensor case. Lift and rotate
the latch ring a 1/4-turn counterclockwise to release cover.
• Remove old batteries and insert three new AAA batteries.
Observe the
+
/- markings inside the battery compartment to
ensure the new batteries are properly aligned.
• Replace S+D Sensor cover.
Maintenance
Rinse the S+D Sensor and its strap in fresh water periodically to
avoid buildup of materials that can interfere with the measure-
ment of your speed and distance.
Resolving S+D Sensor Errors and Error Messages
PROBLEM
• The S+D Sensor cannot lock onto GPS satellites (Indicator light
never changes to flashing green).
• The GPS S+D Sensor loses signals from the satellites during use.
The watch may display a message that the GPS signal is weak.
SOLUTION
• Move to a more open outdoor area.
• Move away from metal objects.
• Replace the batteries in the S+D Sensor.
NOTE: The system can maintain accuracy for short periods when
GPS signals are lost.
PROBLEM
• Watch displays FATAL GPS ERROR message.
SOLUTION
• The S+D Sensor is damaged; contact Timex Customer Service.
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