Industrial communication networks. Fieldbus specifications - Data-link layer service definition. Type 4 elements1 Scope 1. 1 General This part of IEC 61158 provides common elements for basic time critical messaging communications between devices in an automation environment. The term time critical is used to represent the presence of a time window, within which one or more specified actions are required to be completed with some defined level of certainty. Failure to complete specified actions within the time window risks failure of the applications requesting

Industries that release wastewater in natural water bodies

PD CEN/TS 17286 is an international standard that covers the features of stationary source emissions

Annex G (normative) Procedure for recording test weld fracture face defects

establish an OH&S management system to eliminate or minimize risk to employees and other interested parties who may be exposed to OH&S risks associated with its activities

This International Standard gives criteria for gas chromatography and mass spectrometry (GC-MS) identification of target compounds in soil samples

skills and competencies of "responsible persons"

Electrical design engineers

BS EN 61672-1 gives electro acoustical performance specifications for three kinds of sound measuring instruments:

Pneumatic positioners are intrinsically safe and can close a valve with a large amount of force

liquid and gaseous fuels industry

BS EN 61266 also provides you with a preferred method for reporting the performance of existing equipment and specifications for sampling and labelling

Hydrostatic testing