| 摘要 |
PURPOSE:To make the measurement of true mass with high accuracy possible by operating and correcting the buoyancy of air at all times when the density of a sample and the density of the atmospheric air change. CONSTITUTION:This balance is provided with a circuit 3 which operates the correction of the buoyancy of the air acting upon the sample, and a setter 4 which applies the density data of the sample to the circuit 3. The circuit 3 is introduced with the output (w) of a load to electricity converter 2 and corrects the buoyancy of the air in accordance with the density rhoS of the sample, the density (d) of a weight used for calibration of the sensitivity of the balance and the density rhoA of the atmospheric air. |
