High watt measurements

[vktr]

Hello! Yesterday I did a easy ride with two sprints, and the maximum wattage according to the unit was 1467 watt but when I look at the ride file it says max watt was 1326 watt. I figured this is because the maximum watt calculated by the Isaac software is a 5 second interval while in the newton unit it is just one peak measurement of 1467 watt. But when I used 0 smoothing in Isaac and marked the region where I did the sprint, I got a maximum value of 1482 watt. The difference is not big but why is there a difference in the maximum value in the unit and in the software? Do the Isaac software and my unit use different profiles?

[Pete]

Did you have hi-res recording on?

[vktr]

Did you have hi-res recording on?

I have fast rec on.

[Velocomp]

Yes, Isaac uses max 5 sec, whereas Newton uses absolute peak number. I don't why the two max numbers are different, though as you point out they are less than 1%.

Isaac and your Newton use the same profile.

[Russ]

Seems really odd to second guess John but here goes

Since the data file uploaded to Isaac from Newton (remember ibr format is proprietary) has a standard format, I expect not too much different from the csv file but with more data. Perhaps it has more than one per second data points, but not likely that the data in the file which Isaac sees would exactly match the data feed into Newtons firmware from the sensors. So even though Isaac post processing can improve the resulting picture, Newton still has first dibs on the 'real' data. And that difference <1% John said, well a LOT less

Sorry John, can't resist a little reverse engineering speculation from time to time!

Regards,
Russ