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powercalibration

ch_b.mortier  | Mon, 25/11/2013 - 21:56

to climb I'm slower than usual and going straight is much too fast.

the settings in the menu /extras under  P1-3 are nowhere explained.

 

Good morning, Support Elite  | Tue, 26/11/2013 - 11:32

Good morning,

 

The three values P1, P2 and P3 , are three specific point on the calibration map which help the software to know how the trianer works.

Tthey have specific condition of speed and resistance applied by the roller to obtain the final wattage values.

To be able to do the calibration procedure as well, you need a Powermeter, a machine to record the power produced by the resistance unit.

On the market there are a lots, some example could be PowerTap, SRM or whatelse.

Usually the calibration values shouldn't be modified by the customer side, but in some particular conditions it could happen.

calibration anders.lyckman  | Fri, 06/12/2013 - 16:01

Hi,

 

My unit is about 15 w to high compared to my powertap.

maby a little less in higher watts.

 

please advise how to calibrate.

 

best,

anders

calibration anders.lyckman  | Fri, 06/12/2013 - 16:02

Sorry!!!!

To low compared to my powertap.

 

A

Hi, 15 watts could be a Support Elite  | Fri, 06/12/2013 - 16:36

Hi, 15 watts could be a accettable error.

Please take a look on the manual how to mount the trainer on the bike, the tire pressure and the numbers of turns of the back screw.

I have a Realaxiom 6 wired joerg_schaefer  | Mon, 09/12/2013 - 17:56

I have a Realaxiom 6 wired and did the calibration with a stages power crank. The trainer with factory settings displays around 100 Watts too much.

Odd thing: When I do the Training test, everything is fine on the way up with increasing power. But after reaching the cut off heart frequency, when the realaxiom tries to maintain your heartbeat by adjusting the resistance, there will be an offset of about 40 Watts. Strange hysteresis. I'm still trying to find a good set of parameters P1-P3 to get at least close to reality.

Could you explain if the P1,P2,P3 function is linear? Which mathematical model is behind?

Best, Joerg

The three values are three Support Elite  | Tue, 10/12/2013 - 15:42

The three values are three specifics points on the calibration map.

These points allow the software to know how the trainer brakes.

All of those have been calculated at specific speed and specific resistance values.

 

 

P1 = 20 km/h high slope ( there isn't any specifics % of slope )

P2 = 30 km/h middle slope ( there isn't any specifics % of slope )

P3 = 40 km/h flat conditions

Calibration Realaxiom 6 joerg_schaefer  | Tue, 10/12/2013 - 19:47

Ok, this is the information I got already.

Meanwhile I did a little test with different parameters. Looks like the resistance function from the Realaxiom is linear. According to my power meter a setting P1=198 is pretty accurate. P2= 214, P3= 153.

I hope there is no big drift with temperature...

Best,

Joerg

 

Hi, if you have a powermeter, Support Elite  | Wed, 11/12/2013 - 12:20

Hi, if you have a powermeter, and you have tested it, please put those values on the settings.

3 Ps mariogariepy  | Mon, 06/01/2014 - 03:21

To perform a training program, I had to test power on a computrainer. If I want the same degree of effort regarding heart rate, I have to set Ps as this: P1=235, P2=240 and P3=250. This way, watts are about the same has computrainer and more realistic.                 

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