Calibration check

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theorbb
Posts: 4
Joined: Mon Jul 06, 2020 3:50 am

Calibration check

Post by theorbb »

Requesting a calibration check please. My PP had been working excellently until approx 2 weeks ago when it suddenly stopped/refused to pair with my speed sensor which I subsequently lost that same ride (lol). Received a new speed sensor and therefore had to do a new calibration. Also changed my crappy rear tyre/tube to GP5000s + conti tube during that time.

Checking my power against http://www.wolfgang-menn.de/powerhill.htm, PP seems to overestimate by almost 5-10% whereas previously, values were within 2%.

I've uploaded my most recent (post re-calibration) and a previous ride (where I believe calibration was quite accurate)
Attachments
Velocomp_11_21_2020_0712_60_km.ibr
new calibration
(904.23 KiB) Downloaded 135 times
Velocomp_10_15_2020_0916_26_km.ibr
old calibration
(231.1 KiB) Downloaded 133 times
theorbb
Posts: 4
Joined: Mon Jul 06, 2020 3:50 am

Re: Calibration check

Post by theorbb »

Just bumping this.

Additional question - I seem to be riding with a persistent tailwind according to my ride file? Could there be something wrong with the wind scaling?
Velocomp
Velocomp CEO
Posts: 7803
Joined: Fri Jan 11, 2008 8:43 am

Re: Calibration check

Post by Velocomp »

Sorry, I saw your original post but somehow it got lost...

If you can provide specific places in each of your ride files where you think there is an issue that would be helpful.
John Hamann
theorbb
Posts: 4
Joined: Mon Jul 06, 2020 3:50 am

Re: Calibration check

Post by theorbb »

I think I may have found my error in using the calculator. In regards to wind analysis for segments in Isaac, do negative values represent an average tailwind? Similarly, positive values represent headwind?
Velocomp
Velocomp CEO
Posts: 7803
Joined: Fri Jan 11, 2008 8:43 am

Re: Calibration check

Post by Velocomp »

theorbb wrote: Thu Dec 10, 2020 8:11 am I think I may have found my error in using the calculator. In regards to wind analysis for segments in Isaac, do negative values represent an average tailwind? Similarly, positive values represent headwind?
Correct
John Hamann
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