Static phase improvements in the LNE watt balance
The Review of Scientific Instruments
|November 3, 2016
Summary
Mechanical and electrical upgrades to the LNE watt balance significantly reduced noise during static measurements. These improvements enhance the repeatability and reproducibility of results for this crucial metrology instrument.
Area of Science:
- Metrology
- Experimental Physics
Background:
- The LNE watt balance is a critical instrument for realizing the kilogram.
- Noise during the static phase can limit measurement precision.
Purpose of the Study:
- To reduce noise in the static phase of the LNE watt balance.
- To improve the repeatability and reproducibility of static phase measurements.
Main Methods:
- Mechanical modifications: implemented flexure hinges for the balance beam's force comparator pivots.
- Electrical modifications: optimized the servo-control source for beam equilibrium during the static phase.
Main Results:
- Significant reduction in noise levels during the static phase.
- Demonstrated substantial improvements in measurement repeatability.
- Enhanced reproducibility of static phase measurements.
Conclusions:
- The implemented mechanical and electrical modifications effectively mitigate noise in the LNE watt balance.
- These upgrades lead to more reliable and precise metrological measurements.
