What is the purpose of the discrimination test on automatic indicating scales?

The purpose of the discrimination test on automatic indicating scales is to ensure that the width of the zero indication is no greater than one scale division. This is crucial because the zero indication represents the baseline weight measurement that the scale provides when no load is placed on it. If the zero indication varies beyond the acceptable limit of one scale division, it could lead to inaccurate weight readings when a load is applied. The discrimination test helps maintain the precision and accuracy of the scale’s readings, ensuring that it remains reliable in various weighing scenarios.

In a well-calibrated scale, a narrow zero indication allows for more sensitive and accurate measurement capabilities. Maintaining this standard ensures that the scale can effectively differentiate between minute weight changes, which is vital in various applications, especially in trade and legal contexts where precise weight measurements are required.