The European Standard EN has the status of a Swedish Standard. This document con- tains the official English version of EN. Buy EN WORKPLACE ATMOSPHERES – ELECTRICAL APPARATUS USED FOR THE DIRECT DETECTION AND DIRECT CONCENTRATION. Buy I.S. EN WORKPLACE ATMOSPHERES – ELECTRICAL APPARATUS USED FOR THE DIRECT DETECTION AND DIRECT.
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Procedures for workplace exposure measurements, are an important part of the process of exposure assessment, which itself is required to be carried out under national laws and regulations3.
The results of these checks should be recorded and any remedial action should be completed and verified prior to use. Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours. Accept and continue Learn more about the cookies we use and how to change your settings. While these tolerances may initially seem generous, it should be borne in mind that a they are the sum of uncertainties derived from 13 tests; and b variation of exposure to chemical agents in the workplace can be significantly greater than indicated by the uncertainty of a single measurement calculated according to ENdue to the temporal and spatial variability of workplace exposure.
The discussion above has been concerned essentially with performance requirements Parts of EN and therefore more relevant to the manufacturer and test laboratory. The provision of an alarm is probably the most important safety function of a general gas detector whether it is a personal, portable, transportable or fixed monitor.
General requirements and test methods. Occupational Safety and Health: The number of toxic gases occurring in the workplace is very large, and this is matched by toxic gas detectors employing a variety of sensor operating principles.
In conclusion, it is anticipated that the publication of these standards at an international level will help to further improve the reliability and effectiveness of toxic gas detectors and in doing so reduce the risk of fatalities and ill-health from exposure to toxic gases in the ej.
Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours Performance requirements for apparatus used for general gas detection BS EN Nov 06 Read The procedures used for such measurements should give reliable and valid results, so that when compared with occupational exposure limits5, a correct decision can be made, for instance, as to whether the exposure level is acceptable or control measures e. On the road to a green future — high technolo Sep 27 Read 4554-44 requirements for exposure screening measurements are usually less stringent than those for exposure measurements used for comparison with limit values and periodic measurements because the latter two types have regulatory implications.
Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours Performance requirements for apparatus used for exposure measurement.
EN provides guidance on inspection and functional checks: It is applicable to apparatus in which the sensor automatically generates an electrical signal when gas is present.
Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours. 4544-4 set point should be low dn so een associated protective measures can be effective, while high enough to avoid eh alarms, as far as possible. They have now recently been comprehensively revised:. Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours General requirements and test methods BS EN Abwasser Praxis Jan 23 Offenburg, Germany.
Protective concepts in combustible gas and vapor detection. Dec 06 Read Dec 19 Read The routine inspection and functional checks should include checks that ensure: Periodic measurements are performed to determine whether exposure conditions have changed or whether control measures remain effective. Guide for selection, installation, use and maintenance. Thin films of water or contamination on surfaces can also greatly increase the time of response, especially for water soluble gases e.
The alarm set points of the detector should be set specifically for its application. Typically, instantaneous alarms are used to warn against short term acute exposure to a dangerous concentration of toxic gas i.
Free to read This article has been unlocked and is ready to read. Guide for selection, installation, use and maintenance Status: Activation of the main alarm may initiate further, drastic action, e.
Performance requirements of detectors for toxic gases. An important consideration in their use is the availability of gas detector standards.
Different countries may use different values for describing safe levels of potentially toxic substances, see for example, GESTIS see Bibliography which is a collection of publicly available databases on hazardous substances. For general gas detection applications e. Approved Code of Practice and guidance. Dec 13 Read Electrical apparatus used for the direct detection and direct concentration measurement of toxic 45544–4 and vapours.