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HR monitor stops in cold weather?

Old 10-18-07, 08:17 AM
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TwoTyred
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HR monitor stops in cold weather?

it is NOT because of lack of moisture,
so i'm wondering why this is?? What is
it about cold weatehr that makes it lose
its signal?
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Old 10-18-07, 08:41 AM
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Static? Helps to tighten the strap a little.
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Old 10-18-07, 09:32 AM
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What brand? Are you using your own watch/HR monitor or are you looking at a treadmill/exercise equipment not reading it?

I had a problem that the treadmill would read it ever time, but the polar watch wasn't picking it up. I cleaned the chest band area and tightened the chest strap and that seemed to fix it. I can't tell you which one was the problem, but it was wierd when the machine would read it, but the watch that it is supposed to work with wouldn't. They both read the same or similar heart rates. Maybe off by one or two from time to time, but that is rare.
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Old 10-18-07, 11:22 AM
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no, it's none of the things mentioned. When i'm on the
bike,if it's really cold out, teh monitor has no signal, it's
nothing to do with the chest strap/chest, the last time
it happened, it was during a cold, drenching rain, so i
don't' think the electrical contacts were the prollem.
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Old 10-18-07, 11:49 AM
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Originally Posted by TwoTyred View Post
no, it's none of the things mentioned. When i'm on the
bike,if it's really cold out, teh monitor has no signal, it's
nothing to do with the chest strap/chest, the last time
it happened, it was during a cold, drenching rain, so i
don't' think the electrical contacts were the prollem.
Oh yeah ... that's normal. Try taking your bicycle computer out in -20C weather, it'll go black. And if it just blanked out (different from going black), then it could very well be the batteries. Batteries don't work well in cold weather. Take your digital camera out in any temperatures below freezing and after two pictures it will start flashing the low battery symbol. Your battery isn't low, it's just too cold.
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Old 10-18-07, 12:24 PM
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What are you calling really cold? I think that depends upon the part of the country or world in which you are located. My mom lives in Georgia and her really cold days are not even jacket days for us in Iowa. Mine worked outside in below zero temperatures, but it was on my wrist also. Being on the bike might be completely different.
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Old 10-18-07, 04:08 PM
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Read the specs.

My Garmin operating range begins at -4degF, -20degC.
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Old 10-19-07, 09:20 AM
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Originally Posted by TwoTyred View Post
no, it's none of the things mentioned. When i'm on the
bike,if it's really cold out, teh monitor has no signal, it's
nothing to do with the chest strap/chest,
How do you know?

I would guess that the battery in your chest strap may be going bad. That's why you lose signal only in cold conditions where the battery is not at 100% efficiency.

... Brad
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Old 10-19-07, 10:46 AM
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Originally Posted by bac View Post
How do you know?

I would guess that the battery in your chest strap may be going bad. That's why you lose signal only in cold conditions where the battery is not at 100% efficiency.

... Brad
This is a very real possibility. Keep in mind when the chest strap transmits RF data it requires more power (battery capacity). Cold weather compromises battery capacity. If the battery is already weakening and you ride in cold conditions, it increases the likelihood of a a battery failure.
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Old 10-19-07, 10:54 AM
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Originally Posted by TwoTyred View Post
no, it's none of the things mentioned. When i'm on the
bike,if it's really cold out, teh monitor has no signal, it's
nothing to do with the chest strap/chest,
the last time
it happened, it was during a cold, drenching rain, so i
don't' think the electrical contacts were the prollem.
Water is not what is needed. You need an electrolytic solution. When it's warm out, your sweat has enough salts in it to allow the chest strap to get a good reading. When it's cold, it may not. I ran into the same problem and resolved it by using heart rate gel. $5 at Nashbar, and it lasts multiple seasons.
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