<jim_stoll@yahoo.com> wrote: (clip)Anyone else out there have one of these models or similar and had this type of problem?(clip) ^^^^^^^^^^^^^^^^^^ A HRM I used to use would act funny sometimes while I was driving. If I held my wrist close to my chest, it would return to good behavior. I concluded that some electrical signal inside my vehicle was swamping the weak signal from the chest band. Have you tried holding your wrist up to your chest to see whether that makes a difference? Even though your cyclometer is hard-wired, there are pulses in the wiring every time the magnet passes the sensor.
I agree with you that conductive gel is not going to help--sounds to me like a quick phone-fix, and on to the next caller.
<jim_stoll@yahoo.com> wrote in message news:1113841444.094196.24480@f14g2000cwb.googlegroups.com...> I've just purchased a Timex 5C351 HRM for use while training on my> bike. It works fine when not on the bike, and seems to work about 70%> of the time on the bike, but the remaining 30% or so of the time, it> reads a heart rate of 240 - just a bit above my training rate... > It goes in and out of this state on its own, and no amount of> adjusting, mostening, button pushing, etc seems to bring it back to its> senses - it just spontaneously does so on its own.>
I called Timex and they suggested that I try conductive gel, which I'll> do, but I'm a little suspicious of the fact that this just seems to> happen when I'm on the bike (granted, when I've tried it not on the> bike, I'm just at home or work or whatever - ie, not exercising,> bouncing around, etc.) I tried moistening the contacts before putting> the strap on, and when its been reading 240, I've tried adding> additional mosture in the form of both water and saliva, but to no> avail. (Also, there has been a light amount of sweat under the band at> these times, too.) So, anyway, it seems that its got enough moisture> at these times, so that's why I'm kind of wondering if the gel will> make a difference or not. (Haven't had a chance to try it yet, though I> will do so on my next ride) In contrast, I wore it overnight, and the> max rate the next morning was nowhere near 240 - and I'm not sweating> or such at night, so it had minimal moisture for a period of several> hours w/o the slightest problem - and that was with me lying in various> positions, rolling around, etc.>
Anyway, Timex says this is a digital unit and isn't picking up> mechanical-based noise from the bike, EMF from my bike computer or> speed/cadence sensors (both wired), etc.>
Anyone else out there have one of these models or similar and had this> type of problem?>
I'm not intereseted in a Timex vs Polar vs whatever war - I've got no> particular alleigance to Timex, but this is what I've got in-hand and> my goal is to make it work, so please save the brand wars and/or buying> recommendations for another thread! >
Thanks,>
The gel may work. Since you have problems no other time than when riding your bike (I'm assuming you tested off the bike in the same location since alarms, etc can do this to non-coded transmitters). The chest strap has to stay moist and riding a bike you go faster with a higher cooling effect which may be drying you out especially early in the year when temps are cooler and you sweat less.
Are you riding in a group when this happens? If so you may be picking up someone else's signal and throwing yours off.
What you are experiencing is not uncommon, I've seen it with Polar's also (never with a coded transmitter). I have a Polar S-720i and have never had a problem (has coded transmitter). I did have the problem of my S-720 stopping earlier this year (Jan - Feb) and it was due to the fact that I was too cold to sweat and the spit I put on earlier had evaporated. The gel fixed this problem for me.
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