Originally Posted by
tetonrider
What is your goal? Are you trying to prove the vectors are accurate or consistent?
Looks like you are basically testing the slope.
Ideally you want a larger mass (larger will yield lower error) and to know the mass quite precisely. Error should be on the order of 1/10,000th of what is being measured. (E.g. 2g on 20kg)
It actually matters when doing static tests for setting slope.
More accuracy, but consistency as well. From riding them for years I don't feel they're inconsistent. With 2 power meters averaging 300w and 2 power meters averaging 280w I just wanted to know where I was at.
Unfortunately I don't quite have that accurate a scale, it seemed close enough to confirm that power meter was the accurate one.