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HRMs in wind(10 posts)

HRMs in windweiwentg
Mar 16, 2002 12:05 PM
how many of us have HRMs that crap out in windy conditions? as far as my Polar S210 is concerned, I'm undead. It read 225 as I went down a hill - and then for the last bit of my ride it read a nice round 0. do I need to put gel on the electrodes? please say no...
perspiration is required...C-40
Mar 16, 2002 1:54 PM
If the weather's cool you may not sweat enough for the transmitter to work. Otherwise, this problem has nothing to do with the wind. Isn't it always windy when you're traveling 20+ mph?

Some types of HRMs are also affected by power lines and other radio transmissions. I have several areas on my regular route where the signal always drops out on my Cateye HRM.
what I doTSlothrop
Mar 16, 2002 2:21 PM
I probably shouldn't tell you this because I'll become a laughing stock. But what i've always done is to spit on the transmitter. Your spittle doesn't evaporate as quickly as water, and is less hassle than gels. I very rarely have problems with loss of signal. i think that by the time the spit has dried off, I've started to sweat enough to keep the contact moist.
I should add, that other than this habit, i have impeccable hygeine (honest)
I did that...weiwentg
Mar 16, 2002 3:52 PM
well ... I did that before riding. perhaps I didn't apply enough saliva. anyway, temps were a tad under 40, so that might have led to me now perspiring enough. thanks, guys.
I practise good hygiene myself, rest assured.
re: HRMs in windk mand
Mar 16, 2002 2:26 PM
I have a 210 and rode in 20mph winds here in chicago today, it works perfectly. sweat or try some of that jelly. sweat always works for me.
interferenceterry b
Mar 16, 2002 4:19 PM
if it hit 225 and then went to 0 it was probably not the wind. most likely it was a burglar alarm or hidden dog fence. happens to me on one spot of a regular ride - regularly. Goes to 225 then 0 and eventually recovers although sometimes it takes a long time unless I stop and reset it by touching it to the strap. and oh yes, I spit on mine too - works great.
re: HRMs in windBigRingKing
Mar 17, 2002 1:55 AM
My Polar Protrainer NV behaves the same. It began by reading 225 or thereabouts every time I descended hills or rode out in the open on a windy day. It has gotten to a point where thats all it does, even rolling down the drive.
It is just the end of summer down here, so sweat is in abundance. I have also started to use gel, but to no avail. I suspect the battery in the transmitter is getting low. I have calculated that it has approximately 1055 hours of use. Less than half the predicted life given by Polar.I posted my question to the polar helpdesk last week and got the following reply.It still doesn't end my predicament??
Gary.

Thank you for your email.

If the humidity of the air is low, or you are exercising in windy conditions,(for example high-speed road racing), a fluttering shirt may rub the transmitter and generate static electricity. This causes additional signals, especially if the contact between skin and transmitter is poor. To avoid this:

1. Moisten the electrodes before use, or use the conductive lotion or gel
2. Use a cotton shirt instead of a synthetic shirt
3. Use a tighter shirt to avoid fluttering of the material
4. Use the transmitter on a wet shirt
5. Wet the shirt

Best Regards,


Technical Support Consultant
Polar Electro Oy
Finland
re: HRMs in windweiwentg
Mar 17, 2002 6:26 AM
>>1. Moisten the electrodes before use, or use the conductive lotion or gel<<

Duh

>>2. Use a cotton shirt instead of a synthetic shirt <<

Monumental idiocy.

>>4. Use the transmitter on a wet shirt
5. Wet the shirt<<

Duh ... and who the hell wants to exercise in a wet shirt??

Perhaps something got lost in the translation ;)
Polar rep's answer...g-money
Mar 17, 2002 10:05 PM
The problem is not static, but turbulence... The key is the gap you have between your solar-plexus (bottom of the sternum) and the transmitter. If you have a pretty think abdominal area or just simple some decent pecs, this creates a "hole" under the transmitter. When you decend the air goes into and under the transmitter thus causing it to "flutter" just enough to throw it into the tank. The cool thing is, this false HR does not figure in to your total average HR even though it shows up in the max reading. There is nothing that can be done about it, except wear enough layers to keep out to high velocity wind or wear it really tight. It's not batteries, mine is near new and does it as well. It's annoying, but oh well. Perhaps polar will pick up a bit more on the problem and rectify it. Frankly, whoever sent you that email is a Bozo...
re: HRMs in wind = solution foundBigRingKing
Mar 18, 2002 7:52 PM
Further to my previous post. I swapped my transmitter strap with a mate, something I should have done straight away, to find that the transmitter is indeed at fault. My monitor now works fine using his. Time for a replacement.

Gary.