Polar F6 My heart rate is usually 80 beats per minute and now my monitor is at 50 beats per minute.  At first I thought that it was the battery so I had  the  battery replaced, but my heart rate is definitely not 50 beats per minute. Any suggestions?

this is f11 it may help you
http://timlaqua.com/2008/09/how-to-replace-the-battery-in-a-polar-f11-heart-rate-monitor-hrm/

Yes, it is a problem with the installation of the battery. If you did not send the watch into an authorized service center then you should do so this time. It is very easy to damage the circuit boards in the watch if not done properly, plus there is a service warranty when going through the service centers. The fade was most likely from the battery dying, but could also have been from a degraded seal and moisture issues.

Link to Authorized Service Center -

I also have "how to" function related info in my tips and tricks page.

Check out my tips and tricks section for a guide on troubleshooting heart rate readings.

One other possibility if you changed the battery yourself (never recommended) is that some damage or moisture has gotten into your watch and made it impossible for the watch to read heart rate. This is a more common reason than you think and why all manufactures of Heart Rate monitors and other types of watches have you send them in to their authorized service centers.

This happened to me, I think it happens when theres not enough contact with skin and monitor, I put more water onto my skin and the heart rate monitor and it sorted th eproblem

Click on my profile (escapement), then click on Tips and Tricks. There you will find links to all watch manuals. Rate me, please .

This is an old post - is it still a problem? If so, what is the model number of the watch?

Use this link and reset your Polar F6 completely:

http://www.polar.fi/en/support/downloads?product=&category=User+manuals

Rate me, please.

Check that the case back is on the right way. A spring sticking out of the watch mech needs to line up with a hole in the white sticker on the inside of the case back, I think this is the receiver aerial.

Someone posted a link on how to change the batter on an F11. If it's not longer under warranty or you just don't want to bother with sending it back and the extra costs, you could follow this: http://timlaqua.com/2008/09/how-to-replace-the-battery-in-a-polar-f11-heart-rate-monitor-hrm/

no it shouldnt be cause the heart rate would be based off your pulse

im not a heart specialist but ive had my share of heart polups and a faulty valve in my heart
i was told by my doctor that the heart rate is monitored by bloodpreasure threw the veins pulse so i dont think that the size of the watch would make a difference this is in my opinion based off my own docs words hes the doc what can i say

but recommend that you speak with your doctor about heart monitor watches they know more indepth about these devices or your local pharmacy

i hope this helped you out