How the electronic balance is constructed and operated

The quick way to understand how electronic balances work is to first understand how they are constructed. There are two basic types of electronic balance designs: 1. Electromagnetic balance type; 2. Resistance line type (load cell type).
  
These principles are based on completely different principles, but what they have in common is that they cannot directly measure mass. They measure the downward force acting on the pan. The force is converted into an electrical signal and displayed on a digital display.
  
As a means of measuring force, the electromagnetic balance method uses electromagnetic force generated from magnets and coils, while the resistance wire method uses changes in the resistance value of a strain gauge connected to a metal sheet that responds to the force.
  
So, why do electronic balances display mass values when they are not measuring? This is because the reference standard of quality is weight, which is placed on the pan to inform the electronic balance that the given force is equal to the given number of grams, which is used for conversion. Therefore, electronic balances that cannot accurately perform this conversion cannot display accurate mass values.