viitemittari
Viitemittari, literally "reference meter" in Finnish, denotes a class of measurement devices or setups that provide a stable, known reference value for calibration and verification of other instruments. It is not a single standardized instrument but a category used in metrology to ensure traceability and accuracy in measurement chains.
Principle and design: A viitemittari typically offers a highly stable output, with well-characterized drift, noise, and
Applications: Used in calibration laboratories, manufacturing quality control, and field verification routines, viitemittari devices serve as
Standards and traceability: A viitemittari is designed to be traceable to international standards via an established
Limitations: While providing a stable reference, a viitemittari is subject to drift, environmental sensitivity, and maintenance
See also: Metrology, Calibration, Reference standard, Traceability, Uncertainty.