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BS EN 61021-1 guideline specifies the dimensions
This Part 2-2 is applicable to control transformers and power supplies incorporating both control transformers and electronic circuits
Requirements are given for the measurement and analysis of phase distribution data to provide quantitative wavefront parameters and their uncertainty in a test report
repeatable
in any sector
Hydrometry. Suspended sediment in streams and canals. Determination of concentration by surrogate techniques Ingestion-build-264231 BS EN 61021-1 guideline specifies1 Scope This International Standard specifies methods for determination of the concentrations and particle size distributions of suspended sediment in streams and canals by surrogate techniques. Methods based on bulk optical principle of water such as transmission and nephelometry are the most commonly used surrogates for determining suspended sediment concentrations (SSC). Instruments and techniques based on acoustic attenuation and or acoustic