IanJ Posted January 2, 2008 Share The common factor seems to be that your stopped time is triple the actual time? Link to comment Share on other sites More sharing options...
Jason Posted January 2, 2008 Share But why? After a session I compare my PT and Polar files... So I see... Hmm 400W for 30s 3h in to my ride according to the PT... Go check the Polar file and profile... 3h I was going downhill, -12%.How the hell can I average 400W for 30s on a -12% gradient? Well maybe but then my cadence would be 1675 RPM and I would also be running a 1-10 gear ratio.It's just frustrating Jason2008-01-02 01:53:29 Link to comment Share on other sites More sharing options...
BikeMax Posted January 2, 2008 Share But why? After a session I compare my PT and Polar files... So I see... Hmm 400W for 30s 3h in to my ride according to the PT... Go check the Polar file and profile... 3h I was going downhill' date=' -12%. How the hell can I average 400W for 30s on a -12% gradient? Well maybe but then my cadence would be 1675 RPM and I would also be running a 1-10 gear ratio. It's just frustrating [/quote'] I would tend to trust the PT as it samples data much more frequently than the Polar (1 sec as opposed to 5 secs) and so is more likely to be accurate. if PT says 400w for 30 secs at that point then you can be pretty sure you were pedalling that hard. Your extra time in that file looks to be a result of some sort of data corruption from what I can see - the bracketed time is usually just a reflection of total elapsed time, as has been mentioned. Is it just on this file or have you seen strange data on others ? Link to comment Share on other sites More sharing options...
Guest Michelle Posted January 2, 2008 Share BikeMax: Ignore the fact that Jason mentioned anything about Polar... the problem is that the powertap info is blatantly incorrect. Either it's a problem on the PT or with Cyclingpeaks. On the 6 1/2 hour ride, cyclingpeaks managed to download 9 1/2 hours worth of data, it seems to add the extra data when Jason stops for a break & the PT switches off. When he stopped at Ians for example, he only stopped for 10 minutes & started it straight away when they left, but for some reason the file shows there being a 30 minute break.This appears to be like this with all of his power files, it was way more obvious on the longer ride though (having added an additional 3 hours to the elapsed time, instead of only 1 hour for breaks) Link to comment Share on other sites More sharing options...
BikeMax Posted January 2, 2008 Share BikeMax: Ignore the fact that Jason mentioned anything about Polar... the problem is that the powertap info is blatantly incorrect. Either it's a problem on the PT or with Cyclingpeaks. On the 6 1/2 hour ride' date=' cyclingpeaks managed to download 9 1/2 hours worth of data, it seems to add the extra data when Jason stops for a break & the PT switches off. When he stopped at Ians for example, he only stopped for 10 minutes & started it straight away when they left, but for some reason the file shows there being a 30 minute break.This appears to be like this with all of his power files, it was way more obvious on the longer ride though (having added an additional 3 hours to the elapsed time, instead of only 1 hour for breaks)[/quote'] The data itself appears to be correct I think - is AP/NP not in line etc ? The extra time is not correct but the fact that it is exactly 3 hours makes me think it is a corrupt file in some way. If his other files are all this way and the "extra" time is not in line with his stops, then there is most likely a download problem or a Cycling Peaks problem. You can check this by downloading into Power Agent and seeing if the time problem remains or not. Maybe mail me another file along with this one to peteratbikemaxpower.com and I will have a look and see if I can get to the bottom of it. PeterBikeMax2008-03-13 05:04:13 Link to comment Share on other sites More sharing options...
Jason Posted January 2, 2008 Share Hey BikeMax,I just use the Polar for altitude So basically if I ride for a hour... My PT records for an hour and my polar records for an hour... So say now at 25 minutes in to my ride I all of a sudden start pushing 400W I would like to go back to my polar file and see oh yeah that was the start of whatever hill, but that's a bit hard to determine at the moment because the time is so out. Michelle will send you some files but please note, if you see me pushing 100W that's not an error, it's for real We also busy installing the Power Agent SW quick and will let you know... Link to comment Share on other sites More sharing options...
BikeMax Posted January 2, 2008 Share Hey BikeMax' date='I just use the Polar for altitude So basically if I ride for a hour... My PT records for an hour and my polar records for an hour... So say now at 25 minutes in to my ride I all of a sudden start pushing 400W I would like to go back to my polar file and see oh yeah that was the start of whatever hill, but that's a bit hard to determine at the moment because the time is so out. Michelle will send you some files but please note, if you see me pushing 100W that's not an error, it's for real We also busy installing the Power Agent SW quick and will let you know...[/quote'] Happy to have a look. They sample at different times and rates - so you cannot match the data points, although the gradients etc should match up. Link to comment Share on other sites More sharing options...
Jason Posted January 2, 2008 Share OK BikeMax, I've emailed you the files... Check it out. You'll see my ride yesterday, for some reason at 1h 33m it added 10 minutes when viewing the RAW data in Cyclingpeaks. Please let me know It's happening more and more... It won't be a faulty comp unit or will it? If it's not the data reading properly it's adding more data Link to comment Share on other sites More sharing options...
Turk182 Posted January 3, 2008 Share Have you checked the battery in the hub, maybe it's running a little low, maybe there is a delayed recording? Same with the polar speed sensors, soon as the battery runs low the speed seems to increase on the monitor, Link to comment Share on other sites More sharing options...
Jason Posted January 3, 2008 Share Have you checked the battery in the hub' date=' maybe it's running a little low, maybe there is a delayed recording? Same with the polar speed sensors, soon as the battery runs low the speed seems to increase on the monitor,[/quote'] Thanks Turk182, I replaced the batteries 2 and a bit weeks ago so I doubt it's that. It's not a train smash but it just makes it hard to analyze... but yeah it's k@k frustrating.Jason2008-01-03 01:40:29 Link to comment Share on other sites More sharing options...
Turk182 Posted January 3, 2008 Share Have you checked the battery in the hub' date=' maybe it's running a little low, maybe there is a delayed recording? Same with the polar speed sensors, soon as the battery runs low the speed seems to increase on the monitor,[/quote'] Thanks Turk182, I replaced the batteries 2 and a bit weeks ago so I doubt it's that. It's not a train smash but it just makes it hard to analyze... but yeah it's k@k frustrating. do you have the wireless version? i've still got the old one and i'm struggling with the heart rate strap, replaced the batteries but the unit still keeps dropping my heart rate then takes a minute to pick it up again, that really pi$%^^ me off, anyway maybe you should reload cycling peaks, good luck... Link to comment Share on other sites More sharing options...
Jason Posted January 3, 2008 Share do you have the wireless version? i've still got the old one and i'm struggling with the heart rate strap' date=' replaced the batteries but the unit still keeps dropping my heart rate then takes a minute to pick it up again, that really pi$%^^ me off, anyway maybe you should reload cycling peaks, good luck...[/quote'] No, no wireless version... Only the rich Indian kids like Pantani can afford those . I don't use my strap... You don't have any other devices attached that may interfere? I don't have cycling peaks, I use Michelle's, maybe I should just buy the software and check it out on my machine... There's too much cr@p on her machine... House, Desperate House Wifes, Grey's Anatomy etc etc Link to comment Share on other sites More sharing options...
Turk182 Posted January 3, 2008 Share do you have the wireless version? i've still got the old one and i'm struggling with the heart rate strap' date=' replaced the batteries but the unit still keeps dropping my heart rate then takes a minute to pick it up again, that really pi$%^^ me off, anyway maybe you should reload cycling peaks, good luck...[/quote'] No, no wireless version... Only the rich Indian kids like Pantani can afford those . I don't use my strap... You don't have any other devices attached that may interfere? I don't have cycling peaks, I use Michelle's, maybe I should just buy the software and check it out on my machine... There's too much cr@p on her machine... House, Desperate House Wifes, Grey's Anatomy etc etc Best to get your own version, does not cost that much and it's brilliant, don't have any other gadgets on the bike, just have to change the battery again or maybe give the strap a good beating that sometimes works, what is it with Grey's Anatomy my wife is addicted, and she just got a copy of the new season from my old lady..... Link to comment Share on other sites More sharing options...
Guest Michelle Posted January 3, 2008 Share Funny funny... Plan of action is to send Jason on another 9-hour ride, then download into cyclingpeaks & poweragent... check if the raw data on poweragent has the jumps in time, then we will know that it's the powertap... if it's correct there, then it must be the cyclingpeaks... Link to comment Share on other sites More sharing options...
Jason Posted January 3, 2008 Share Best to get your own version' date=' does not cost that much and it's brilliant, don't have any other gadgets on the bike, just have to change the battery again or maybe give the strap a good beating that sometimes works, what is it with Grey's Anatomy my wife is addicted, and she just got a copy of the new season from my old lady.....[/quote'] I'll have a look, which package do I get? Athlete Home Addition or what? Dunno what's with Grey's, but this disease is spreading fast!! Link to comment Share on other sites More sharing options...
Jason Posted January 3, 2008 Share Funny funny... Plan of action is to send Jason on another 9-hour ride' date=' then download into cyclingpeaks & poweragent... check if the raw data on poweragent has the jumps in time, then we will know that it's the powertap... if it's correct there, then it must be the cyclingpeaks... [/quote'] You are too kind... 9 hours is like a rest day for me at the moment Link to comment Share on other sites More sharing options...
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