Polar CS100 quirk

I’ve been using a Polar CS100 computer/heart rate monitor for a few weeks. Here’s the quick review:

  • It’s been mostly reliable, though interference problems can occur with the HRM (due to power lines, I believe).
  • The array of functions makes the learning curve a little steeper than for a simpler cyclecomputer. However, the user interface is relatively intuitive to use.
  • There are multiple display options; I typically use the one that shows current speed and heart rate in large numerals, and distance in the smaller top row. The small numbers can be difficult to read, although the primary readout numerals are very legible.
  • Installation and set up were a breeze. I particularly like the simple head mount that can go on a stem or handlebar.

One odd quirk I noticed today: I switched the computer on just as we were rolling out, and the HRM readout briefly showed a reading of 221 (hmm…not my usual resting heartrate) then went to zero for the remainder of the ride. After the ride I zeroed out the ride totals, let the HRM reacquire a signal, and rode around the parking lot a bit. The reading was fine. So apparently it’s important to wait the 15 or so seconds the Polar CS100 needs to acquire the HRM signal before you start rolling. Otherwise you’ll get no HRM data for the ride.

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