Testing of Electronic Balances

Abstract

Most of the electronic balances have a digital output. The indication is in the form of a sequence of digits. That is the unit digit on the extreme right of the display represents the smallest value of mass, which the balance is capable to read. In other words, mass of any body placed on it is the integral multiple of mass value of unit digit at the extreme right of the display. Normally it is thought that the balance may best repeat within ± one digit on the extreme right of the display. It is therefore expected that errors permitted should be an integral multiple of the mass value of unit digit of the extreme right of the display. However it is not true. We can certainly check the balance or weighing machine in terms of a fraction of the last digit [1].