Water Vapour Effects in Mass Measurement

TL;DR

This paper investigates how water vapour inside a mass comparator affects measurement accuracy, proposing a method to control it and reporting preliminary observations of vapour sorption and desorption processes.

Contribution

It introduces a new method to control water vapour effects in mass measurement and provides initial experimental data on vapour interactions with mass standards.

Findings

Water vapour fluctuations impact mass measurement accuracy.

A proposed method can help control water vapour effects.

Preliminary observations of vapour sorption/desorption processes were reported.

Abstract

Water vapour inside the mass comparator enclosure is a critical parameter. In fact, fluctuations of this parameter during mass weighing can lead to errors in the determination of an unknown mass. To control that, a proposal method is given and tested. Preliminary results of our observation of water vapour sorption and desorption processes from walls and mass standard are reported.