Measurement Deviations of as many as ±10 % for various measurements taken on precisely the same drive belt are to be a rule not caused by a measurement error or fault during the unit. Typically, measurement deviations are as a result of mechanical tolerances of the generate systems. Measuring theory: https://banknifty30638.luwebs.com/33079546/the-smart-trick-of-belt-tension-meter-that-nobody-is-discussing