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Excessive use of the backlight drains the training computer’s battery more rapidly. In cold conditions,
the low battery indicator may appear, and disappear again when you return to a warmer environment.
To ensure the maximum lifespan of the battery cover, open it only when changing battery. When
changing the battery, make sure the sealing ring is not damaged, in which case you should replace it
with a new one. Battery kits with sealing rings are available at well-equipped Polar retailers and
authorized Polar Service Centers. In the USA and Canada, sealing rings are available at authorized
Polar Service Centers only.
Keep batteries away from children. If swallowed, contact a doctor immediately. Batteries should be
properly disposed of according to local regulations.
Precautions
Interference During Exercise
Electromagnetic Interference and Exercise Equipment
Disturbance may occur near microware ovens and computers. Also WLAN base stations may cause
interference when exercising with RS800CX. To avoid erratic reading or misbehaviors, move away from
possible sources of disturbance.
Exercise equipment with electronic or electrical components such as LED displays, motors and
electrical brakes may cause interfering stray signals. To solve these problems, try the following:
1. Remove the transmitter from your chest and use the exercise equipment as you would normally.
2. Move the training computer around until you find an area in which it displays no stray reading or
does not flash the heart symbol. Interference is often worst directly in front of the display panel of
the equipment, while the left or right side of the display is relatively free of disturbance.
3. Put the transmitter back on your chest and keep the training computer in this interference-free
area as much as possible.
If the training computer still does not work with the exercise equipment, it may be electrically too
noisy for wireless heart rate measurement.
Using RS800 Training Computer in Water
The training computer is water resistant. However, heart rate measurement does not work in water. You
can use the training computer under water as a watch but it is not a diving instrument. To maintain
water resistance, do not press the buttons of the training computer under water. Using the training
computer in excessive rainfall may also cause interference.
Minimizing Risks When Exercising
Exercise may include some risk. Before beginning a regular exercise program, it is recommended that
you answer the following questions concerning your health status. If you answer yes to any of these
questions, we recommend that you consult a doctor before starting any training program.
Polar RS800CX User Manual 53