ボイルの法則による分銅の体積測定に関する考察

— 体積比較器としての実用性 —

抄録

The volume or density is one of the very important characteristics for weights. This paper concerns the precise volume measurement of weights. The authors developed a volume measuring apparatus which is based on Boyle's law, and use it as a volume comparator. The volume of weights in a wide mass range can be determined by comparison against a known reference volume. In each comparison, the volumes of the measurement weight and the reference weight are almost equal. The effectiveness of the developed method is verified by a fundamental experiment on weights of 100g to 2kg. For determination of volume of 1kg weights, the expanded uncertainty is evaluated to be 0.048cm³, which is sufficiently applicable to volume measurement of the highest class E₁ weights.