Question about Polar CS100

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Hi, i have bought a bike with a polar cs100 computer attached,only for some reason can remove the display unit, please can you assist me on the save removal of the i do not have any instructions. thanks richard

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Is it mounted on the handlebar? Try pushing down gently and then twist 90 degrees. It should come away from the bar mount. It attaches the same way in reverse. 

Posted on Feb 02, 2009


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The CS100 is designed to only work off the front wheel. if you are using a trainer where the rear wheel is spinning and the front wheel is stationary you will get no reliable reading. if this was the case on the old bike, you got lucky, the system is not designed to read that way. Too far a distance between sensor and computer.

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Hi, well the reason this has happened is that these contacts are stored in battery backed up NVRAM, now this RAM is very sensitive to polarity reversal, and also due to the way it works, doesn't have polarity reversal protection, on that circuit. So when you reversed those batteries even though the reverse polarity protection saved the Unit as a whole, the NVRAM would have been destroyed or wiped at best. These is no real way of replacing this NVRAM, I guess you could send it back to the factory though and ask for a "Quote" with view to the repair.

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