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Heart Monitor Flat Lining

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Heart Monitor Flat Lining

Old 06-09-05, 12:36 AM
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Bikerchuck
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Heart Monitor Flat Lining

I have a bike Narshbar heart monitor with chest strap transmitter. Several years old, good batteries in sender and receiver. Many time the indicated rate os '0" ( but I feel just fine). I believe the few years of sweating have impaired that sensitivity of the chest strap electrode.

Does anyone have the proper solution for cleaning/ renewing that sensitivity?
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Old 06-09-05, 05:56 AM
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born2bahick
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Try washing the transmitter with soap and water and dry thoroughly, However I suspect it could also be reciever failure. Good luck!
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Old 06-09-05, 05:58 AM
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Using an electrode cream like "Buh Bump" helps a LOT.

http://www.sarkproducts.com/buh_bump...rode_cream.htm
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Old 06-09-05, 09:43 AM
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Have someone check your pulse.
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Old 06-09-05, 02:14 PM
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I found that my reliable old Cateye (about 10 years old!) occasionally won't register until I start to sweat noticeably. If I use it with my indoor trainer, I have to wipe the contact point with a wet rag or something till I get warmed up.
Electrode goo works...But so does spit.
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Old 06-09-05, 05:14 PM
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Originally Posted by Bikerchuck
Many time the indicated rate os '0" ( but I feel just fine).
Of course you feel fine. There is no pain on "the other side".

Hey, how are Houdini and Elvis doing?
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Old 06-09-05, 07:02 PM
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im still using the same CICS receiver i bought in 83 BUT!!!!! the straps don't last forever. I have gone thru many. The trick with the older ones anyway, is that the material used to pick up and transmit is constantantly breaking down just from the expansion and contraction of your chest ... after a while they just do not pick up anymore and need to be replaced.. On the way to total failure you will get a lot of
weird stop and go reads... when the batteries go it tends to be all or nothing.. but the
failure of the fibers in the sensors can act weird on the way out..
Other symptom was, on the older models the transmitter was a piece that snapped onto the belt, and it had wiring inside that would eventually corrode due to the caustic sweat. I had to rewire the thing several times, clipping out the corroded sections. The newer belts are all integrated transmitter and belt so they may not suffer the same plight, but if there is a battery in there that you can get to to replace.. then you can bet you can get sweat in there too.. something to check..
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Old 06-10-05, 08:14 AM
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KY works very well too, plus it's cheaper. It may be that you are getting interference from electrical signals in the area. I know there are certain roads that guarantee that I will get a flatline on the HRM. Generally it's due to improperly shielded electrical lines or some other source of EMF. Higher end HRMs generally avoid this in the same way they avoid picking up signals from neighboring HRMs.
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Old 06-11-05, 05:45 PM
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If the display shows "0" when you are at the same location, it's probably electrical interference. There are several places on my commute where my polar shows "0".
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Old 06-13-05, 06:15 PM
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Originally Posted by GreyGoat
im still using the same CICS receiver i bought in 83 BUT!!!!! the straps don't last forever. I have gone thru many. The trick with the older ones anyway, is that the material used to pick up and transmit is constantantly breaking down just from the expansion and contraction of your chest ... after a while they just do not pick up anymore and need to be replaced.. On the way to total failure you will get a lot of
weird stop and go reads... when the batteries go it tends to be all or nothing.. but the
failure of the fibers in the sensors can act weird on the way out..
Other symptom was, on the older models the transmitter was a piece that snapped onto the belt, and it had wiring inside that would eventually corrode due to the caustic sweat. I had to rewire the thing several times, clipping out the corroded sections. The newer belts are all integrated transmitter and belt so they may not suffer the same plight, but if there is a battery in there that you can get to to replace.. then you can bet you can get sweat in there too.. something to check..
Dear GreyGoat and others:

Many thanks for your replies. Tried EKG electrode conducting gel on the strap leads and that was partially successful. Worked off and on for about 75% of the time on my 111 mile ride yesterday (3 flat tires, torrential downpour for a half hour and the afternoon was 87deg and 90% rel humidity-one of those memorable rides). (Soap and water cleansing didn't make any difference.) Alas, everything has a life expectancy and I am ready to declare this unit a DNR. If any of you have a favorite monitor, feel free to express your opinion.

Bikerchuck
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