Application Note: ECL and the USP Minimum Weight Standard
15 October 2018

ECL, which stands for Electronically Controlled Load, is A&D's unique technology (patent pending) of generating a minute load (0.3 to 3% of the balance capacity) by purposely altering the equilibrium state of the electromagnetic force restoration sensor. A balance with this technology, such as the GX-A/GF-A series, allows the user to test its repeatability performance without using an external weight by automatically calculating the standard deviation from 10 repeated measurements with the said artificially generated load. Further, based on the result of this repeatability test, the balance indicates the minimum weight
in accordance with the United States Pharmacopeia (USP) standard. Currently, ECL can complete a repeatability test and minimum weight calculation in about a minute and a half.