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EVS-EN IEC 60746-4:2019
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Identne IEC 60746-4:2018; EN IEC 60746-4:2019
Expression of performance of electrochemical analyzers - Part 4: Dissolved oxygen in water measured by membrane-covered amperometric sensors
This part of IEC 60746 is intended: - to specify terminology, definitions and requirements for statements by manufacturers for analyzers, sensor units and electronic units used for the determination of dissolved oxygen partial pressure or concentration; - to establish performance tests for such analyzers, sensor units and electronic units; - to provide basic documents to support the applications of quality assurance standards [1]1. This document applies to analyzers using membrane covered amperometric sensors. It applies to analyzers suitable for use in water containing liquids, ultrapure waters, fresh or potable water, sea water or other aqueous solutions, industrial or municipal waste water from water bodies (e.g. lakes, rivers, estuaries), as well as for industrial process streams and process liquids. Whilst in principle amperometric oxygen-analyzers are applicable in gaseous phases, the expression of performance in the gas phase is outside the scope of this document. This document is applicable to analyzers specified for permanent installation in any location (indoors or outdoors) using membrane-covered amperometric sensors.

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prEN IEC 60068-2-70:2019
Identne IEC 60068-2-70:201X; prEN IEC 60068-2-70:2019
Tähtaeg 15.05.2019
Environmental testing - Part 2-70: Tests - Test Xb: Abrasion of markings and letterings caused by rubbing of fingers and hands
This document provides a standard method to determine the resistance of marking, lettering, surfaces and materials to abrasion arising from manual operation. The method is applicable to marking, lettering, surfaces and materials on flat or curved surfaces such as those that may occur on actuators and keyboards. The method can test the abrasion resistance in the presence of fluids, pastes, particles and other materials, singly or in combination.
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