Resistance measurements are typically compromised by a variety of phenomena, for example serial resistance in the measurement path, self-heating or non-ohmic properties. Whether the effect of such phenomena on a resistance measurement is acceptable or not depends on the magnitude of each effect in comparison to the resistance and to the required accuracy. Hence,the risk

This International Standard covers electrical mobile motor-operated vacuum cleaners Equipment Protection Level (EPL) Dc. This includes dust extractors, for wet suction or dry suction, intended for commercial indoor use with or without attachments, to collect combustible dust in an explosive dust atmosphere.

This International Standard specifies the audio reproduction method for normalized loudness level of audio sources for consumer equipment and systems.

This International Standard specifies the performancerequirements for LED modules,together with the test methods and conditions, required to show compliance with this standard. The following types of LED modules are distinguished and schematically shown in Figure 1: Type 1: integrated LED modules for use on d.c. supplies up to 250 V or on a.c. supplies up

This document recommends the climatic, mechanical and electromagnetic performance requirements and methods of test for radiation protection instrumentation. This document also provides guidance regarding the setup of test equipment and instruments under test (IUT) for certain tests. The object of this document is to define, for design and test purposes, the environments in which radiation