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BS EN 50271:2018

BS EN 50271:2018

$167.15

Electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen. Requirements and tests for apparatus using software and/or digital technologies

Published By Publication Date Number of Pages
BSI 2018 36
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This European Standard specifies minimum requirements and tests for electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen using software and/or digital technologies.

This European Standard is applicable to fixed, transportable and portable apparatus intended for use in domestic premises as well as commercial and industrial applications and their software-controlled safety related accessories.

This European Standard does not apply to external sampling systems which are not accessories, or to apparatus of laboratory or scientific type, or to apparatus used only for process control purposes.

This European Standard supplements the requirements of the European Standards for the detection and measurement of flammable gases and vapours (e.g. EN 60079‑29‑1 , EN 60079‑29‑4 , EN 50194‑1 , EN 50194‑2 ), toxic gases (e.g. EN 45544 series, EN 50291‑1 , EN 50291‑2 ) or oxygen (e.g. EN 50104 ).

NOTE 1

These European Standards will be mentioned in this European Standard as “metrological standards”.

NOTE 2

The examples above show the state of the standardization for gas detection apparatus at the time of publishing this European Standard. There may be other metrological standards for which this European Standard is also applicable.

This European Standard is a product standard which is based on the EN 61508 series. It covers part of the phase 10 “realisation” of the overall safety life cycle defined in EN 61508‑1 .

Additional requirements are specified if compliance with safety integrity level 1 (SIL 1) according to the EN 61508 series is claimed for fixed or transportable apparatus for low demand mode of operation. They can also be applied to portable apparatus which are able to perform an automatic executive action.

It is recommended to apply this European Standard for apparatus used for safety applications with SIL-requirement 1 instead of EN 50402 . However, the technical requirements of EN 50271 and EN 50402 are the same for SIL 1.

NOTE 3

For apparatus used for safety applications with SIL-requirements higher than 1 EN 50402 is applicable.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 1 Scope
2 Normative references
8 3 Terms and definitions
10 4 Design principles
4.1 Basic requirements
4.1.1 General
4.1.2 Analogue/digital interface
4.1.3 Numerical errors
4.1.4 Measuring operation
4.1.5 Special state indication
4.1.5.1 General
11 4.1.5.2 Fixed and transportable apparatus
4.1.5.3 Portable apparatus
4.2 Displays
4.2.1 General
4.2.2 Indication of messages
12 4.2.3 Indication of measured values
4.3 Software
4.3.1 General
13 4.3.2 Re-used or commercial operating systems
4.3.2.1 Requirements
4.3.2.2 Use of operating systems without validation of functional safety
4.3.3 Software requirements
14 4.3.4 Requirements for software documentation
4.3.5 Requirements for the software development process
4.3.5.1 General
16 4.3.5.2 Specification of the requirements for the software
4.3.5.3 Software architecture
18 4.3.5.4 Software design
19 4.3.5.5 Coding
20 4.3.5.6 Software test
4.3.5.7 Hardware-software integration test
21 4.3.5.8 Validation
4.3.5.9 Software modification
22 4.4 Hardware
4.5 Digital data transmission between components of apparatus
4.6 Test routines
24 4.7 Instruction manual
25 4.8 Additional requirements for compliance with SIL 1
26 5 Test of the digital unit
5.1 General
27 5.2 Verification of functional concept
5.3 Performance test
29 Annex A (normative)Hardware-software integration test
A.1 Functional testing/Black-box testing
A.2 Equivalence class test with boundary value analysis
31 Annex ZY(normative)Significant changes between this European Standard and EN 50271:2010
33 Annex ZZ(informative)Relationship between this European standard and the essential requirements of Directive 2014/34/EU aimed to be covered

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BS EN 50271:2018
$167.15