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How to calibrate Polar S1 foot pod with Polar RS400 Running Computer

The optional calibration of Polar S1 foot pod™ improves the accuracy of speed, pace and distance measurements. We recommend that you calibrate the sensor:


a) before using it for the first time
b) if there are significant changes in your running style, or
c) if the position of the sensor on the shoe is dramatically changed (e.g. if you have new running shoes).

Sensor calibration can be done by running a known distance or by setting the calibration factor manually.

Before calibrating make sure that the sensor function is enabled on the running computer. Select Settings → Features → Footpod → On/off → On → OK.



Calibrating Polar S1 foot pod by running a distance (on-the-fly calibration)
You can calibrate the foot pod at any phase of your exercise with a lap distance correction. Run a known distance of preferably more than 1000 meters (approx.1094 yards / 0.62 miles).

If you are using distance-based targets, you cannot do on-the-fly calibration.

To calibrate on the fly
1. In time mode press OK twice and begin your run.
2. When you are at a starting point of a known lap distance, press OK to take a lap. Once you have run the whole lap distance, press OK again.
3. Stop running and stand still.
Then calibrate the sensor by choosing either alternative:
a) Press and hold LIGHT to go to Settings Calibrate Correct lap Set true lap distance.
b) Press STOP once. Select SettingsCalibrate Correct lap Set true lap distance.







4. Fix the displayed lap distance with the distance you just ran, and press OK.
Calibration completeand the Factor x.xxare displayed. The foot pod is now calibrated and ready for action.


Setting calibration factor manually

The calibration factor is calculated as a ratio of the actual distance to the uncalibrated distance. For example, if you run 1200m but the training computer shows a distance of 1180m, the calibration factor is 1.000.
The new calibration factor is calculated as follows: 1.000*1200/1180 = 1.017.
The measuring range for the factor is 0.500-1.500.

You can set the calibration factor in four different ways.
1. Before exercise
a) Select Settings → Features → Footpod → Calibrate
b) Set the Calibration factor and press OK.
The foot pod is now calibrated.

2. After starting heart rate measurement and before exercise recording
a) Select Settings → Footpod → Calibrate
b) Set the Calibration factor and press OK.
The foot pod is now calibrated.
c) Press OK to start exercise recording.

3. During exercise with exercise recording paused
a) Start exercising by pressing OK twice in the time display. Press STOP once and the exercise recording is paused.
b) Go to Settings → Calibrate → Set factor.
c) Set the Calibration factor and press OK.
The foot pod is now calibrated.
d) Press OK to continue exercise recording.

4. During exercise without pausing exercise recording
a) Start exercising by pressing OK twice in the time display. Press and hold LIGHT button to go to Settings.
b) Select Calibrate → Set factor.
c) Set the Calibration factor and press OK.
The foot pod is now calibrated and you can continue running.

If Footpod calibration failedis displayed, the foot pod calibration was not successful. Please try again.
The calibration is done in metric units. This is because the most universal calibration location is a 400m track, even in countries where imperial units are used.


For best results Polar recommends that you do the calibration run on the type of terrain and with the speed you normally use for running.


 

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