Optimization of Mass Standards and Weights Calibration (1 mg - 1 kg) Using Rotational Automatic Mass Comparator.

The article will present the influence of automation of mass standards comparison on reducing measurement uncertainty during mass determination of mass standards and weights. Also the ergonomic and economic benefits of using presented solution will be proved. The parameters of comparators repeatability will be proved based on the tests carried out on selected types of manual and automatic mass comparators of the same weight and reading unit. The repeatability takes a significant part in measurement uncertainty budget during mass standards and weights calibration process. The measurements will be carried out in the same ambient conditions, characteristic for calibration of the mass standards and weights of E1 and E2 classes. The tests will show differences in determining repeatability during manual comparison carried out by different operators. Those differences may take part in uncertainty budget and have influence on measurement accuracy (by increasing measurement uncertainty). Therefore, process automation is expected to eliminate the differences.