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THE
POLAR POWER SYSTEM |
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Installing the Power Sensor
- The power sensor should be installed on the center of the drive side chain stay. The measurement is most accurate when the chain runs just over the power sensor's center axis. The accuracy decreases when the chain is skewed or when the chain runs over the left or right side of the power sensor.
- Place 2 rubber pads on the center of the drive side chain stay and then place
the sensor on the pads. You should be able to read the Polar logo from left to right,
when you are on the drive side of your bike, with the chain speed sensor cable leading toward
the back of your bike. Place the "middle" notch, located on the side of the power sensor,
in the middle of the chain stay. Thread the zip ties through the holes located on the bottom of
the power sensor, wrap around the chain stay and fasten loosely. Make sure you do not wrap the
zip ties around the rear derailleur cable.
* Do not tighten the zip ties of the sensor fully before installing the crank magnet.
- When the drive side crank is in the 9 O'clock position, install the crank magnet on either the bottom or top side of the crank near the pedal. Make sure you place the rubber pad between the sensor and the crank, and fasten loosely. To ensure successful transmission of cadence signals, the crank magnet should pass the cadence notch, located on the side of the power sensor towards the front. Make sure the crank magnet does not touch the chain when the chain is on the smallest rear cog and large chain wheel.
- Fine-tune the position of both the crank magnet and the power sensor so that the magnet passes the sensor closely but does not touch it. The maximum distance between the power sensor and the crank magnet should be 7mm or .3 inches. Cut off any excess zip tie ends.
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