POLAR M21 - Manual (Page 50)

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user information is changed. Cumulative exercise
information can not be returned after resetting.
In models M51 and M52 you can set two users’ preferences
in the memory. Select the correct user in the beginning of
an exercise.
... THERE IS NO HEART RATE READING (- -)?
1. Check that the electrodes of the transmitter are
moistened and that you are wearing it as instructed.
2. Check that you have kept the transmitter clean.
Care and maintenance
3. Check that there are no sources of electromagnetic
radiation in the close vicinity of the Polar wrist receiver,
such as TV sets, mobile phones, CRT monitors etc.
Precautions
4. Have you had a cardiac event which may have altered
your EKG waveform? In this case consult your physician.
...HEART SYMBOL FLASHES IRREGULARLY?
1. Check that your Polar wrist receiver is inside the
transmission range and not further that 3 feet/ 1 meter
from the Polar transmitter you are wearing.
2. Check that the elastic strap has not become loose during
exercise.
3. Make sure that the electrodes of the transmitter are
moistened.
4. Make sure that there is no other heart rate transmitter
within the reception range (3 feet / 1 meter).
Precautions/Crosstalk
5. Cardiac arrhythmia may cause irregular readings. In this
case consult your physician.
...OTHER PERSON WITH HEART RATE MONITOR IS
CAUSING INTERFERENCE?
Your training partner may have coincidentally activated
exactly the same code as you. In this case keep distance to
your training partner or proceed as follows:
1. Stop the stopwatch and heart rate measurement.
2. Take the transmitter off your chest for 10 seconds.
3. Put the transmitter back and start the heart rate
measurement again.
M52 man USA GBR A 2001 10/12/01, 12:46 51