PowerPod Windsensor broken ?

[PaulK32]

Good Afternoon John,

4 years an enthousiastic user of the PowerPod (V2 BLE), 1024 rides.

15-05-2020 I made a tour on my roadbike. PowerPod worked fine.
16-05-2020 I made a tour on my MTB. PowerPod gave value 0 driving on the "flat". When I did a hill it gave a value, some 150 tot 300W lower then "normal" on that part of the track. During the ride I thought "windsensor ?" or the CR2032 battery from de speedsensor ? At home I gave the speedsensor a new battery.
17-05-2020 I made a tour on my MTB. Again value 0 on the first hunderd meters. I stopped, changed the angle of the PowerPod a little. It gave high values as aspected (saw 1193W on the Garmin, 12900W in the software at home) and the value went down and after a minute it was 0 again. I stopped, pushed the button and did a new calibration ride. It went to 100 and then there came a value of 70W and the value went down, after 15 seconds it was 0. I completed the ride and saw at ascents that there came "above 0" values (max 430W) on the Garmin.

Can you help me with some options ?
a. Just use a brush to clean the windport ?
b. Is the windsensor blocked (fly ?) and can I try to make it clean ? Should I fill it with water, shake and let it dry ?

I have attached the 3 rides for your information. Perhaps the data gives you a hint. The 2018-07-20 file is the file from today 17-05-2020, the calibration gave the PowerPod a new date.

With kind Regards,
Paul

[Velocomp]

Your wind port is not the problem.

It looks like you tweaked your profile between your two MTB rides.

On the final ride you did a hard reset of the unit prior to riding, but you also did a new sensor pairing (your HR ID is different).

Somehow the rolling resistance was set to a negative value of -0.03! Effectively, this means your unit thinks your bike is being pushed down the road from behind, pretty strongly!

I set your profile to a more reasonable MTB value of +0.006. Once I do this your watts return to normal values. Corrected file attached.

You should do a new cal ride. Make sure your PP is locked on to the bike and cannot rotate. Also, don't change its rotational position during the ride.

[PaulK32]

Thank you John. I did use a New HR sensor.

I will do test rides with the bikes next days.

Happy te PowerPoint is not the problem, just me as the user

[PaulK32]

Thank you John. PowerPod is working fine.

I will do beter checks in Isaac next time myself. Have not had this "negative" Crr.