Hi,
Noticed today that power drops to zero on a regular basis even while pedaling. Does that make sense? Added today's ride file. Was running some short intervals and ended riding hard for a while.
Some examples: 0:03:23; 0:07:25; 0:08:57; 0:12:26; 0:27:05; 0:34:55; 0:40:01; 0:46:14; 0:55:31
Thanks,
Morten
Power drops to zero even while pedaling
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GooseRider
- Posts: 58
- Joined: Wed May 10, 2017 10:52 am
Power drops to zero even while pedaling
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Re: Power drops to zero even while pedaling
Most of the places you pick out have zeroes only for 1 second.
3:23--no explanation
7:25--gear change
8:57--you're on a downhill
12:26 downhill
27:05 no explanation
3455--cadence slows a bit
I did not look at the rest of them...
The "culprit" is that you have your PP set to transmit with zero filtering. This is a super-twitchy mode. And, if you're seeing these "zeroes" on your bike computer screen, then you have your bike computer filtering set to super-twitchy as well.
Either set your PP to 3 second averaging, or your bike computer. That will take care of the problem.
3:23--no explanation
7:25--gear change
8:57--you're on a downhill
12:26 downhill
27:05 no explanation
3455--cadence slows a bit
I did not look at the rest of them...
The "culprit" is that you have your PP set to transmit with zero filtering. This is a super-twitchy mode. And, if you're seeing these "zeroes" on your bike computer screen, then you have your bike computer filtering set to super-twitchy as well.
Either set your PP to 3 second averaging, or your bike computer. That will take care of the problem.
John Hamann
-
GooseRider
- Posts: 58
- Joined: Wed May 10, 2017 10:52 am
Re: Power drops to zero even while pedaling
John,
Thank you for looking through it. You are right, my PowerPod is unfiltered. On my bike computer, I run 3s averaging on most of the screens. I have one screen setup to show unfiltered, 3s, 10s, and power zone. I was playing around with finding my maximum endocrine (5s) power. Now wonder about the accuracy of short time period power measurements. Like 5s and 10s. 1s out of 5s could have quite an impact.
What is the minimum recommended time period where the PowerPod could be considered accurate? 5s? 10s?
Thanks,
Morten
Thank you for looking through it. You are right, my PowerPod is unfiltered. On my bike computer, I run 3s averaging on most of the screens. I have one screen setup to show unfiltered, 3s, 10s, and power zone. I was playing around with finding my maximum endocrine (5s) power. Now wonder about the accuracy of short time period power measurements. Like 5s and 10s. 1s out of 5s could have quite an impact.
What is the minimum recommended time period where the PowerPod could be considered accurate? 5s? 10s?
Thanks,
Morten
Re: Power drops to zero even while pedaling
The truth is that all PMs, with the exception of PP, filter (smooth) their outputs. PP is the only PM that lets you see truly "raw" data.
PP is not less accurate when you set its filtering to 0; it's just that you see the raw, not filtered, data.
The data PP records has zero filtering, no matter what the smoothing setting is. So, you can do your 5 second analysis in Isaac, irrespective of smoothing setting.
I would probably set smoothing to 1 or 5 seconds, just so you don't go crazy trying to look at your bike computer data. Then, I would do the analysis in Isaac.
PP is not less accurate when you set its filtering to 0; it's just that you see the raw, not filtered, data.
The data PP records has zero filtering, no matter what the smoothing setting is. So, you can do your 5 second analysis in Isaac, irrespective of smoothing setting.
I would probably set smoothing to 1 or 5 seconds, just so you don't go crazy trying to look at your bike computer data. Then, I would do the analysis in Isaac.
John Hamann