Which when combined measuring device series strain gauge and then found out that upkon is set in response force that is capable of measuring weight is measured by weight, the weight is up to 1000 Newton. When the calibration equation used to have a calibration equation during labor contractions, stretching the term to the truck frame is x + y = 0.0007 1.4037 calibration equations and set the signal micro-strain (X) by the value based on variable weight (Y), and the relationship is linear, the equation is Y = X – 6036.4 12565 is and when to observe the graph figure 10B will find that the value will not start at the point 0, 0 due to the characteristics of the kit is comprised of a weight measurement, the force is with the labour and equipment made with strain gauge is not the same, that is, to have a strong impact with the device before the force went to work against the strain gauge, but a check.It is reliable in implementation because the value R ² = 0.9061 considered the value is high.
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