Unstable ride
Posted: Fri Aug 16, 2019 9:19 pm
Hi
Just as I thought i was getting settles with my powerpod I had a terrible experience today.
Started off on a bike and paired sensr first, no issue, then garmin, but still the slop / cda not showing on the garmin even after reboot
I thought that the numbers looked bad on the ride to start with, way way too high, then four times in the first hour or so the unit started to read zero watts for several minutes and then start again, but displaying 500+ watts instead of the expected 150-200 until the auto calibration kicked in. Still no cda/slope showing on the garmin. Eventually the zero power display problem disappeared. Eventually i saw my cadence sensor died ( flat battery i guess). The power display came back down from 500w, but still i reckon 30-50% higher than expected, my typical power on the flat would be ~150-170w, whereas even drafting was showing 200+. The average normalised power for the 96km ride was nearly 400w, should have been around 150w. The profile is correct for the bike. The file appears to show the wind and speed was being recorded by the unit, but no power on the file, its not a communication with the garmin thats the problem
We stops for a few minutes and then as soon as we started again the power jumped to an impossible 1000w+ for several minutes, when still riding on the flat...the sensor was showing 15% gradient, but had not moved in the mount. eventually the auto cal kicked in again.Only after we had a further stop for 15 minutes did the unit start to give a power that was around my realistic numbers for the last 10km of the ride (250w on a climb, 100-150w on the flat). By comparison two people with other PMs who are 75-80kg vs my 57kg heavier recorded average power at 145-150w each, so my average should have been around 120w give or take a bit.
Any ideas? , could the loss of a cadence sensor cause the power output to change by by disrupting the signal ? i find the only time i can get the wind and slope to display is right after doing a calibration, each time just turning my garmin on it never displays, no matter how many times i reboot. Also the average power my garmin was showing was way too high at 220w, does the dynamic smothng cause the garmin unit to over estimate the average?
Was a dry day, using a garmin speed sensor, only a couple of months old. mounted in a rigid mount not moving.
Just as I thought i was getting settles with my powerpod I had a terrible experience today.
Started off on a bike and paired sensr first, no issue, then garmin, but still the slop / cda not showing on the garmin even after reboot
I thought that the numbers looked bad on the ride to start with, way way too high, then four times in the first hour or so the unit started to read zero watts for several minutes and then start again, but displaying 500+ watts instead of the expected 150-200 until the auto calibration kicked in. Still no cda/slope showing on the garmin. Eventually the zero power display problem disappeared. Eventually i saw my cadence sensor died ( flat battery i guess). The power display came back down from 500w, but still i reckon 30-50% higher than expected, my typical power on the flat would be ~150-170w, whereas even drafting was showing 200+. The average normalised power for the 96km ride was nearly 400w, should have been around 150w. The profile is correct for the bike. The file appears to show the wind and speed was being recorded by the unit, but no power on the file, its not a communication with the garmin thats the problem
We stops for a few minutes and then as soon as we started again the power jumped to an impossible 1000w+ for several minutes, when still riding on the flat...the sensor was showing 15% gradient, but had not moved in the mount. eventually the auto cal kicked in again.Only after we had a further stop for 15 minutes did the unit start to give a power that was around my realistic numbers for the last 10km of the ride (250w on a climb, 100-150w on the flat). By comparison two people with other PMs who are 75-80kg vs my 57kg heavier recorded average power at 145-150w each, so my average should have been around 120w give or take a bit.
Any ideas? , could the loss of a cadence sensor cause the power output to change by by disrupting the signal ? i find the only time i can get the wind and slope to display is right after doing a calibration, each time just turning my garmin on it never displays, no matter how many times i reboot. Also the average power my garmin was showing was way too high at 220w, does the dynamic smothng cause the garmin unit to over estimate the average?
Was a dry day, using a garmin speed sensor, only a couple of months old. mounted in a rigid mount not moving.