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BS EN 50194-1:2023

BS EN 50194-1:2023

$167.15

Electrical apparatus for the detection of flammable gases in household premises – Test methods and performance requirements

Published By Publication Date Number of Pages
BSI 2023 40
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This document specifies general requirements for the construction, testing and performance of electrically operated apparatus for the detection of flammable gases, designed for continuous operation in a fixed installation in household premises. The apparatus can be mains or battery powered. Additional requirements for apparatus to be used in recreational vehicles and similar premises are specified in EN 50194-2. NOTE For caravan holiday homes EN 50194-1 applies. This document specifies four types of apparatus to warn and/or alarm in the event of an escape of town gas, natural gas or liquefied petroleum gas (LPG), Hydrogen and flammable refrigerant gases: — Type A apparatus – provides a visual and audible alarm and an executive action in the form of an output signal that can actuate directly or indirectly a shut-off device and/or other ancillary device in the event of an escape of town gas, natural gas (LNG) liquefied petroleum gas (LPG) and Hydrogen gases; — Type B apparatus – same as Type A but provides a visual and audible alarm only; — Type C apparatus – provides a visual and audible alarm and an executive action in the form of an output signal that can actuate directly or indirectly a shut-off device and/or other ancillary device in the event of an escape of flammable refrigerant gas A2L, A2 or A3 as classified in other International Standards, e.g. ISO 817; — Type D apparatus – intended to be installed where there can be a source of danger to the public, designed for continuous operation in fixed installations in non-classified explosive atmosphere premises (where the requirements for electrical Ex-safety are not requested). Intended for any flammable gases. Typically Type D apparatus are available with analogue or digital output, designed as detection system. These systems are regularly maintained by competent persons and/or have a protection of IP44 or higher. For type D apparatus, EN 60079-29-1 is applied. See Annex C for further clarification on the apparatus types and their application. NOTE Apparatus complying with this document is not considered suitable for installation in potentially explosive atmospheres, in which case the EN 60079 series applies. NOTE Apparatus complying with EN 60079-29-1 will not necessarily comply with this document. This document does not apply to any of the following: — apparatus intended for the detection of dusts or mists in air; — scientific or laboratory-based apparatus used only for analysis or measurement; — apparatus used exclusively for process measurement purposes; — apparatus for medical purposes; — apparatus used for breath alcohol measurement; — apparatus intended for the direct measurement of automotive exhaust gases; — apparatus intended for use in industrial environments.

PDF Catalog

PDF Pages PDF Title
2 undefined
9 1 Scope
10 2 Normative references
3 Terms and definitions
12 4 Symbols and abbreviations
13 5 Design requirements
5.1 General requirements
5.2 Construction
5.3 Visual indicators
14 5.4 Alarms
5.5 End-of-life
5.5.1 General
5.5.2 Prediction of end-of-life
5.5.3 Inbuilt testing of end-of-life
5.5.4 End-of-life fault warnings
15 5.6 Fault warnings
5.7 Transmittable output signal (applicable for type A and type C apparatus only)
5.8 Software-controlled apparatus
5.9 Labelling
16 5.10 Requirements for the use of batteries
5.10.1 Battery low voltage warning
5.10.2 Battery capacity
5.10.3 Battery reversal
5.10.4 Battery connections
17 5.10.5 Battery removal feature
5.11 Inter-connectable apparatus
5.12 Back-up power source
5.12.1 General
18 5.12.2 Monitoring of back-up power source
6 Test and performance requirements
6.1 General requirements for tests
6.1.1 Test samples for type testing
19 6.1.2 Preparation of samples
6.1.3 Use of mask for testing
6.1.4 Test chamber
6.1.5 Unpowered storage
6.2 Normal conditions for tests
6.2.1 General
20 6.2.2 Test gases for alarm testing
6.2.3 Speed of air and test gas
6.2.4 Power supply
6.2.5 Temperature
6.2.6 Humidity
6.2.7 Pressure
6.3 Test methods and performance requirements
6.3.1 General
21 6.3.2 Transmittable output signal
6.3.2.1 Test
6.3.2.2 Performance requirement
6.3.3 Alarm set point
6.3.3.1 Pre-set level
6.3.3.2 Test
6.3.3.3 Performance requirements
6.3.4 Alarm during warm-up time
6.3.4.1 Test
6.3.4.2 Performance requirements
6.3.5 Response time
6.3.5.1 Test
22 6.3.5.2 Performance requirement
6.3.6 Temperature effects
6.3.6.1 Test
6.3.6.2 Performance requirement
6.3.7 Humidity effects
6.3.7.1 Test
6.3.7.2 Performance requirement
6.3.8 Air velocity test
6.3.8.1 Test
6.3.8.2 Performance requirement
6.3.9 Supply voltage variations (mains powered apparatus only)
6.3.9.1 Test
6.3.9.2 Performance requirement
23 6.3.10 Electromagnetic compatibility
6.3.10.1 Test
6.3.10.2 Performance requirements
6.3.11 Slow increase of gas volume ratio
6.3.11.1 Test
6.3.11.2 Performance requirements
6.3.12 Effects of other gases
6.3.12.1 Test
24 6.3.12.2 Performance requirement
6.3.13 Long term stability
6.3.13.1 Test
6.3.13.2 Performance requirement
6.3.14 Ignition test
6.3.14.1 Test
25 6.3.14.2 Performance requirement
6.3.15 Refrigerant poisoning and oil spray test (for Type C apparatus only)
6.3.15.1 General
6.3.15.2 Test
6.3.15.3 Performance requirement
6.3.16 Alarm sound level
6.3.16.1 Test
26 6.3.16.2 Performance requirements
6.3.17 Degree of protection
6.3.17.1 Test
6.3.17.2 Performance requirement
6.3.18 Mechanical strength
6.3.18.1 Test
6.3.18.2 Performance requirement
6.3.19 Stability in high humidity test (for type C apparatus)
6.3.19.1 Test
6.3.19.2 Performance requirement
27 6.3.20 Stability to low humidity test (for type C apparatus)
6.3.20.1 Test
6.3.20.2 Performance requirement
7 Apparatus using radio links
7.1 General
7.1.1 General
7.1.2 RF range and reproducibility tests
7.1.3 Failure of radio link
7.1.4 Identification codes
7.1.5 Environmental requirements
28 7.2 Radio link tests
7.2.1 RF Range
7.2.1.1 General
7.2.1.2 Transmission power test procedure
7.2.1.3 Receiver test
7.2.2 Failure of radio link tests
7.2.2.1 Test
7.2.2.2 Performance requirements
7.2.3 Identification codes verification tests
29 7.2.4 Environmental tests
7.2.4.1 Test
7.2.4.2 Performance requirements
8 Self-contained battery powered apparatus
8.1 Battery low voltage warning
8.1.1 General
8.1.2 Test
30 8.1.3 Performance requirements
8.2 Battery capacity
8.2.1 General
8.2.2 Assessment
8.2.3 Performance requirements
8.3 Battery reversal
8.3.1 General
8.3.2 Test
8.3.3 Performance requirements
31 8.4 Battery connections with flexible leads only
8.4.1 General
8.4.2 Test
8.4.3 Performance requirements
8.5 Back-up power source
8.5.1 Objective
8.5.2 Test
8.5.2.1 Low back-up
8.5.2.2 Open circuit
8.5.2.3 Short-circuit
8.5.3 Performance requirements
32 9 User instructions
9.1 General
33 9.2 Instructions for apparatus with replaceable sensor
9.3 Instructions on location of the gas detection apparatus
9.4 Instructions on emergency actions
34 10 Packaging
35 Annex A (informative)Test arrangement schematics for sound level test
36 Annex B (informative)Calculation of the expected battery service life
B.1 General requirements
B.2 Example
B.2.1 Capacity required for 1 year operation in milli Ampere hours (mAh)
B.2.2 Capacity required for 4 min alarm
B.2.3 Capacity required for 30 days audible battery low voltage warning
37 B.2.4 Alarm Voltage Operating Range
B.2.5 Battery Data
B.2.6 Expected Service Life
38 Annex C (informative)Clarification of the Type A, Type B, Type C and Type D apparatus

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BS EN 50194-1:2023
$167.15