USER GUIDE
Polar T31/T31C Transmitter Maintenance
With good care your T31 / T31C heart rate sensor last longer. Dirt impairs the elasticity and
functioning of the heart rate sensor.
Wash the heart rate sensor regularly after use.
T31 / T31C heart rate sensors should be
washed with a mild soap and water solution. After washing, dry the heart rate sensor carefully
with a soft towel.
If the electrodes appear discolored, you may use a gentle brush. Do not use any alcohol or a
solvent based detergent.
Rinse the elastic strap with water after every use and wash it regularly
in a washing
machine at 40ºC/104ºF.
This ensures reliable measurement and maximizes the life span of the
heart rate sensor. Use a washing pouch. Do not soak, spin-dry, iron, dry clean or bleach the strap.
Do not use detergent with bleach or fabric softener. Hang the elastic strap up to dry.
Wash the elastic strap in a washing machine before long-term storage, and always after use in
pool water with high chlorine content. Never put the heart rate sensor in the washing machine or
drier!
Never store the heart rate sensor wet, in a damp environment or in any kind of non-
breathing material, such as a plastic bag or a sports bag. Sweat and moisture may keep the
electrodes wet and the heart rate sensor activated. This will shorten the battery life. Keep in a
cool and dry place.
Do not bend or stretch the heart rate sensor. This may damage the electrodes.
How does a Polar Training Computer measure heart rate?
Heart rate is like a window into your physical condition. It tells you your body's exertion level.
The harder you train, the higher amount of oxygen you consume and the higher your heart rate
is. By listening to your heart rate, by peering through that window into your physical condition,
you get real-time guidance during training that is specific to you.
A Polar training computer helps you to listen to your body. Each training computer has two
parts: the training computer itself and a heart rate sensor to read your heart rate.
