Tips

Calibrate Stride Sensor with RCX5

 


You can calibrate the stride sensor by running a known distance, or by setting the calibration factor manually. Polar RCX5 training computer is compatible with Polar s3 stride sensor W.I.N.D. and Polar s3+ stride sensor.

Calibration of the stride sensor improves accuracy of speed, pace, and distance measurements. It is recommended that you calibrate the sensor by running
- before using it for the first time
- if there are changes in your running style
- if the position of the sensor on the shoe is changed, e.g. if you have new running shoes or if you switch the sensor from your right shoe to your left one.

Stride sensor calibration is sport specific. You can use different calibration factor for different styles of running. For example, if you have created new sport (Jogging) in WebSync software, you need to calibrate the stride sensor for that sport also. The calibration should be done at the speed you normally run.



Before you can calibrate the stride sensor make sure


- the sensor is paired with the training computer. See Related documents for further information
- the stride sensor feature in the training computer is on. Select Settings Sport profiles Running (or sport created in WebSync) → Stride sensor On.

Calibration by Running a Certain Distance
Minimum calibration distance is 400 meters / 0.3 miles.

1. Select Settings Sport profiles Running (or sport created in WebSync) → Stride sensor calibration By running.
2. Adjust the distance, how far you wish to run, to calibrate the sensor and accept with the OK button.
Stand still until stride sensor is found is displayed.
3. Press OK. Run ... km/mi is displayed.
4. Press the OK and start the run by making the first step with the sensor foot onto the starting line.
Run the preset distance at a steady pace.
5. Press OK after xxx km/mi is displayed.
6. Stop exactly on the stop line of the preset distance. Press OK.
7. When the calibration succeeds, Calibrated to x.xxx is displayed. The new calibration factor is used.
8. After calibration, Continue recording? is displayed. If you wish to continue session, select Yes.
Otherwise, select No.

If the calibration fails Calibration failed is displayed and if you cancel the calibration by pressing the Stop button, Calibration canceled will be displayed. When calibration fails, try again.

If Check sensor was displayed, the calibration fails.

On-the-fly Calibration by Running a Distance
You can calibrate the sensor at any phase of your training with lap distance correction, provided you are not training with distance-based targets. Just run a known distance, at least 400 meters / 0.3 miles. To ensure successful calibration, set off AutoLap feature.

1. In time mode press OK to enter pre-training mode. Browse the sport profiles with Up/Down.
2. Wait until the stride sensor and other enabled sensors are found.
3. Start the training by pressing OK.
4. When you are in a starting point of a known lap distance, press OK to save a lap.
When you have run the whole lap distance, press OK to save a lap again.
5. Then calibrate the sensor: Press and hold Light to enter the Quick menu. Browse to Calibrate stride sensor and press OK.
4. Browse to Set correct lap distance and press OK. Fix the displayed lap distance with the distance you just ran, and accept with OK. Calibrated to x.xxx displayed.
The sensor is now calibrated and ready for action.

Alternatively you can calibrate the stride sensor by fixing the whole distance gathered.
1. In time mode press OK to enter pre-trainnig mode. Browse the sport profiles with Up/Down.
2. Wait until the stride sensor and other enabled sensors are found.
3. Start the training by pressing OK.
4. Press and hold Light to enter the Quick menu. Browse to Calibrate stride sensor and press OK.
5. Browse to Set correct distance and press OK. Fix the displayed distance with the distance you just ran, and accept with OK. Calibrated to x.xxx displayed.
The sensor is now calibrated and ready for action.

During training, there is also a possibility to set the calibration factor manually.

Set Calibration Factor Manually
The calibration factor is calculated as a ratio of the actual distance to the uncalibrated distance.
Example: you run 1200m, the training computer shows a distance of 1180m, the calibration factor is 1.000.
Calculate the new calibration factor as follows: 1.000*1200/1180 = 1.017. The measuring range for the factor is 0.500-1.500.

To calibrate the stride sensor manually before training
1. Select Settings Sport profiles Running (or sport created in WebSync) Stride sensor Set factor
2. Adjust the factor.

Option is also available during training, when stride sensor is in use. Press and hold Light to go to Quick menu Calibrate stride sensor Set factor.
 

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