Question about Polar F4 Heart Rate Monitor Watch

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Watch says Check heart rate transmitter BPM not working

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Posted on Jan 02, 2017

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SOURCE: Timex heart rate monitor does not keep correct BPM. I changed the battery, now the heart rate hovers in the 30' and 40's, never getting to the correct BPM

Make sure the back of the watch is spotless and your skin isn't too dry.

Posted on Apr 23, 2009

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jgwhomeequip
  • 1902 Answers

SOURCE: Inaccurate Measurements of heart rate

Replace the battery. Then make sure that it is placed on the proper artery that it is supposed to be on. If your heart rate was 210 you would be in the hospital with a heart attack. And also the only person I know with a heart rate of 90 when running is Lance Armstrong. Your heart rate should be about 120 to 135 and it will just around in those areas but should never go higher

Posted on May 22, 2009

  • 11800 Answers

SOURCE: I have had my Timex

The heart rate is recorded at these abnormally low levels because the sensor has lost its sensibility. This can be caused by only 2 things:
1 - the battery for the watch is almost dried and its voltage has dropped so low that the sensor can't work no more. You will have to replace the battery. because your watch is a sealed type you should take it to a repair shop: they will know how to open it carefully enough as to not damage the rubber seals.; and if they can't open it without damage they will have replacement rings.
2 - the sensor itself (which basically is just a microphone that listens to the beats) is clogged by dirt. Wash the watch in hot soapy water and look very carefully for cracks in the rubber of the strap - if you find one then the sensor has been permanently damaged by the sweat that seeped in. In that case it's time for a new one.

Posted on Dec 15, 2010

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Replace the battery. Then make sure that it is placed on the proper artery that it is supposed to be on. If your heart rate was 210 you would be in the hospital with a heart attack. And also the only person I know with a heart rate of 90 when running is Lance Armstrong. Your heart rate should be about 120 to 135 and it will just around in those areas but should never go higher

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Hello,

It sounds like most of you have the heart rate set to display in % of max heart rate. Most Polar products have the option of heart rate in BPM(beats per minute) or percentage of max.

If you look at the display during the exercise, you will see a % icon. You can turn it off in by hitting the back button and go down to HR view settings.

Hope this helps.

Chris @ Polar USA

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