The Effect of Object Position on Reading Error on Weighing Scale

In this paper, static force analysis and experiment on weighing scale are discussed. From the static force analysis, it was known that there is one parameter that must be fulfilled by a weighing scale. That parameter, theoretically, causes measurement result not to be affected by the object position. In addition, an equation has been derived to calculate the capacity of sensor required. From the experiment on two commercial weighing scales, the reading error has been identified. The experiment results show differences in measurement reading if the object position is varied. Those differences cause the weighing scale have a reading error. However, the reading error is relatively small, i.e. less than 4%. The results reported here can be used to develop weighing scale for further purpose such as weighbridge.