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That’s what’s confusing me too; every metric is consistent throughout the TT expect power, which jumps up to expected levels at the 5mi (lap) mark.
I mean it was cold yesterday morning and warmed up quite quickly but would that temp difference (about 3 degrees) have resulted in this? Avg power recorded for lap 1 was 203w (essentially low tempo level) and lap 2 was 287w (c. threshold).
Will give it a steady run on the turbo this morning and if there’s any more inconsistencies then I know the meter is playing up.
pifko-
I've not noticed temp differences like that (I'm pretty sure Quarq do temp compensation, it was only early P2M that didn't). I wonder if its auto-zero got weirded out somehow? Like, what triggers it? Could the Lap have triggered an offset zeroing? That would imply that its auto-zeroing isn't working properly though, given the jump.
Oh, was the auto-lap also at a turn, where you might've been coasting? I think Powertap used to do their zeroing when coasting so perhaps if you coasted around the turn, it zero'd and the Lap is a red herring. I'd need to read up on Quarq docs to see how/when it does the auto zeroing.
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Which model is it?
"MagicZero is a feature of Firmware 10 and is available via the SRAM AXS App for all AXS and DZero power meters."
https://www.trainerroad.com/forum/t/sram-axs-quarq-powermeter-magiczero-vs-autozero/46708
https://www.sram.com/en/quarq/campaigns/magiczero-auto-calibration
"Typically, the MagicZero measurements occur when the bike is stationary, coasting, or slowly backpedaling."
So it is kinda similar to Powertap, but a little bit smarter by the sounds of it.
hippy
I don't understand what the lap button has to do with the power calibration. I've never seen anything that suggests they're linked.