AUTOMATIC WEIGHT EXCHANGER FOR SERIES DESIGN CALIBRATION

W. G. Lee, Y. J. Lee

Abstract

An automatic weight exchanger for series design calibration of a decade weights is described. The vertical pan with 6 loading positions is hanged down from a balance hook. Weights are loaded on and lifted off vertically. Every weight has its own vertical guide for lifting and loading. The vertical motion is realized by 6 synchronous stepping motors. The weight exchanger is installed with a commercial balance of 205 g capacity and 0.01 mg readability. The full operation is automated with a personal computer. The performance tests were carried out. The present status results indicate: Calibration time and labor could be reduced significantly. Uncertainty could be reduced by reducing operator’s random error. Calibration series of 100-50-20-20’-10-10’ g was tested successfully to give maximum Type A uncertainty of 0.014 mg. The apparatus will be incorporated with Internet web for remote calibration and education.

Download

IMEKO-TC3-2001-034.pdf

DOI

-

IMEKO TC

TC3 - Measurement of Force, Mass, Torque, and Gravity

Back to the proceedings