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BATTERIES
POLAR TRANSMITTER
The estimated average battery life of the Polar transmitter
is 2500 hours of use. Contact your distributor/ dealer for a
transmitter replacement. Customer Care Charter
for detailed instructions.
Polar recycles used transmitters.
POLAR M71 ti RECEIVER
The estimated average battery life of the Polar M71 ti
receiver is 1 year in normal use (2h/day, 7 days a week).
However, because the battery is inserted at the factory, the
actual life of your first battery once in your possession may
be less than the estimated battery life. Note also that
excessive use of the backlight and the alarm signals will use
the battery more rapidly.
Do not open the Polar wrist receiver yourself. To ensure the
water resistance properties and the use of qualified
components, the wrist receiver battery should be replaced
only by a person authorised by Polar Electro Oy. At the
same time a full periodic check of the Polar Heart Rate
Monitor will be done. Customer Care Charter for
detailed instructions.
SERVICE
Should your Polar Heart Rate Monitor need service, see
Customer Care Charter to contact an authorised Polar
Service Center.
Water resistance cannot be guaranteed after
unauthorised service.
USING A POLAR HEART RATE
MONITOR IN A WATER
ENVIRONMENT
Polar M71 ti Heart Rate Monitor is water resistant to 50
metres/160 feet. To maintain the water resistance, do not
operate the buttons of the wrist receiver under water.
Heart rate measurement in a water environment is
technically demanding for the following reasons:
• Pool water with a high chlorine content and seawater
may be very conductive and the electrodes of Polar
transmitter may get short circuited and ECG signals
cannot be detected by the transmitter unit.
• Jumping into the water or strenuous muscle movement
during competitive swimming may cause water
resistance that shifts the transmitter on the body to a
location where it is not possible to pick up ECG signal.
• The ECG signal strength varies depending on the
individual’s tissue composition and the percentage of
people who have problems in heart rate measuring is
considerably higher in a water environment than in
other use.
POLAR HEART RATE MONITOR
AND INTERFERENCE
ELECTROMAGNETIC INTERFERENCE
Disturbances may occur near high voltage power lines,
traffic lights, overhead lines of electric railways, electric bus
lines or trams, televisions, car motors, bike computers, some
PRECAUTIONS
m71ti manual GBR/B 16.1.2001, 11:0134-35