Workplace atmospheres. Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours. Guide for selection, installation, use and maintenance.
Scope:
This European Standard gives guidance on the selection, installation, use and maintenance of electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours in a workplace atmospheres. The primary purpose of such apparatus is to measure the concentration of a toxic gas or vapour in order to provide an exposure measurement and/or detection and warning of its presence.
This European Standard is applicable to apparatus whose primary purpose is to provide an indication, alarm and/or other output function to give a warning of the presence of a toxic gas or vapour in the atmosphere and in some cases to initiate automatic or manual protective actions. It is applicable to apparatus in which the sensor automatically generates an electrical signal when gas is present.
This European Standard is not applicable, but may provide useful information, for apparatus;
- used for the measurement of oxygen
- used only in laboratories for analysis or measurement
- used only for process measurement purposes
- used in car parks or tunnels (fixed apparatus only)
- used in domestic environments
- used in environmental air pollution monitoring
- used for the measurement of combustible gases and vapours related to the risk of explosion
It does not apply to open path (line of sight) area monitors.
For apparatus used for sending the presence of multiple gases, this European Standard applies only to the detection of toxic gas or vapour.
2. Normative References
The following documents, in whole or in part are normatively referenced in this document and are indispesible for its application. for dated references, only the edition cited applies. For undated references, the latest edition of the reference document (including any amendments) applies.
- EN 482:2012+A1:2015, Workplace exposure- General requirements for the performance of procedures for the measurement of chemical agents
- EN 45544-1:2015, Workplace atmospheres- electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours- Part 1: General requirements and test methods
- EN 45544-2:2015, Workplace atmospheres- electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours- Part 2: Performance requirements for apparatus used for exposure measurements.
- EN 45544-3:2015, Workplace atmospheres- electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours- Part 3: Performance requirements for apparatus used for general gas detection.
