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Calibrating a Tacx Flow
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Bernie Hayden
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Nov 16, 2006 14:53 PST
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Has anyone tried changing the calibration on their Tacx Flow? I'm not talking about the number generated when you do the roll down test. I know that that is just an indicator of rolling resistance and that you have to adjust tire pressure or roller position to achieve zero to get the same power numbers from session to session. What I'm asking about is the "hidden" feature which Tacx describes as how to adjust for mains voltage. Out of the box my Flow reads ~17% higer than the wattage reported by a PowerTap.
More info; the Flow reports the same wattage regardless of whether or not it's hooked up to the resistance unit that came with it or the resistance unit that came with my Tacx Grand Excel. So, what I really need to do is change the calibration of the computer and NOT the resistance unit. I want to keep the two resistance units interchangable. FWIW the Grand Excel reports wattage that is ~5% lower than the PowerTap.
Thanks,
-Bernie Hayden
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