Verification of a Method for Testing Repeatability of Electronic Balances Without Using a Weight

Recently, balances are increasingly used in unfavorable environments such as inside a fume hood or enclosure where airflow is generated. Under such circumstances, it is essential to correctly evaluate the performance of the balance at the actual location of installation, which requires calculating repeatability using a weight. However, in many fields, use of weights is a cumbersome and time-consuming operation. Solution: Load/unload the balance without using a weight by electronically controlling and altering its internal settings. In this application note, this method for evaluating the performance (repeatability) of a balance, called Electronically Controlled Loaded or ECL, is proposed and tested.