RChung

People say this all the time but, unless you're doing something that's a lot more important than riding a bike, you really don't need much more precision and accuracy than you can easily to achieve with most modern watches to know the "correct time." The work it takes to raise a mass m to a height h is m*h*g so if you can run a test with your two power meters that will tell you how much "work" you performed to raise your mass m to a height h, you can generally tell which power meter's measurement of work is "correct." The only trick is in formulating the proper test.