User manual

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 Wear the watch in the normal way, with the watch face on top of your wrist and the bottom of the
watch touching your skin, away from the wrist bone.
 Do the strap up so that it is tight to your wrist without being uncomfortable.
 You get the most accurate results from the heart rate sensor when you are warmed up.
Important: To improve accuracy, KEEP STILL until your heart rate is detected.
Cleaning your watch
It is recommended that you clean your watch once a week if you use it frequently.
 Wipe the watch with a damp cloth as needed. Use mild soap to remove oil or dirt.
 Do not expose your watch to strong chemicals such as gasoline, cleaning solvents, acetone,
alcohol, or insect repellents. Chemicals can damage the watch’s seal, case and finish.
 After swimming, rinse your watch with tap water and dry it with a soft cloth.
 Clean the heart rate sensor area and connection pads with mild soap and water as needed.
 Do not scratch the heart rate sensor area. Protect it from damage.
The heart rate sensor
If your watch has a built-in heart rate sensor it can help you train more efficiently.
You can choose to use the built-in heart rate sensor or an external sensor if the watch is mounted on
your bike handlebars, or not to use a sensor at all.
Note: If your watch doesn’t have an integrated heart rate monitor, you can also buy a separate
chest strap to record the same information at tomtom.com/sportsaccessories.
How the sensor works
Your heartbeat is measured by using light to measure changes in your blood flow. This is done on the
top of your wrist by shining light through the skin onto the capillary veins just below the skin and
detecting the changing light reflections.
The performance of the heart rate sensor is not affected by body fat percentage or body hair. It IS
however affected by how you wear the watch on your wrist and by whether you have warmed up or
not.