New Quarq PM user. I just got off the phone with SRAM, and enabling AutoZero will enable MagicZero.
The reason I called was because last week during a 10 minute warmup I was cruising along at around 150W, then stopped for a light, and restarted and now my Garmin was showing power between 30-80W. So I stopped and force quit the AXS app on my iPhone and it went back to normal. But I was left wondering what really happened.
Well the Quarq support guy told me that AutoZero/MagicZero has an issue under these conditions:
- you stop for a light or for any reason
- unclip left foot
- put pressure on right foot
- AutoZero will attempt to do a zero calibration, but doesn’t know you are putting pressure on right foot
- from that point until next AutoZero, the power will read low
For that reason I’m turning off AutoZero and will simply do a Zero Calibration before starting a ride.