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BS 5446-4:2020 Fire detection and fire alarm devices for dwellings - Specification for multi-sensor fire alarms using any combination of smoke, heat and carbon monoxide sensors, 2020
- Foreword
- Introduction: Open Descriptions
- 1 Scope
- 2 Normative references
- 3 Terms, definitions, symbols and abbreviations
- 4 Product characteristics and test procedures [Go to Page]
- 4.1 General testing methods
- 4.2 Indicators
- Table 1 — Individual alarm indicator
- Table 2 — Mains-on indicator
- Table 3 — Additional indicators
- Table 4 — External ancillary devices
- Table 5 — Manufacturer’s adjustments
- Table 6 — On-site adjustment of response behaviour
- Table 7 — Power supply type
- Table 8 — Monitoring of back-up power source
- Table 9 — Power source missing prevention
- Table 10 — Battery leads or terminal connections
- Table 11 — Battery reversal
- Table 12 — Battery fault warning
- Figure 1 — Battery fault warning test circuit
- Table 13 — Routine test facility
- Table 14 — Fire alarm signal
- Table 15 — Sound output
- Table 16 — Sounder durability
- Table 17 — Protection against ingress of foreign bodies
- Table 18 — Software controlled multi-sensor fire alarms
- Table 19 — Inter-connectable multi-sensor fire alarms
- Table 20 — Radio frequency link range
- Table 21 — Temporary disablement facility
- Table 22 — Alarm muting facility
- 4.3 Nominal activation conditions/sensitivity
- Table 23 — Repeatability of CO response
- Table 24 — Directional dependence of smoke response
- Table 25 — Directional dependence of CO response
- Table 26 — Directional dependence of heat response
- Table 27 — Reproducibility of smoke response
- Table 28 — Reproducibility of CO response
- Table 29 — Reproducibility of heat response
- 4.4 Response to slowly developing fires, ageing and contamination
- Table 30 — Drift compensation
- 4.5 Response delay (response time)
- Table 31 — Air movement
- Table 32 — Dazzling
- 4.6 Variation in supply voltage
- Table 33 — Variation in supply voltage
- 4.7 Fire sensitivity
- Table 34 — Fire sensitivity
- Table 35 — Quantity and combination of sensors for fire sensitivity testing
- Table 36 — Fire parameter
- 4.8 Durability of normal activations/sensitivity
- Table 37 — Dry heat (operational)
- Table 38 — Dry heat (endurance)
- Table 39 — Cold (operational)
- Table 40 — Temperature cycling (for leisure accommodation vehicles)
- Table 41 — Low humidity, steady-state (operational)
- Table 42 — Damp heat, cyclic (operational)
- Table 43 — Damp heat, steady-state (operational)
- Table 44 — Damp heat, steady-state (endurance)
- Table 45 — SO2 corrosion (endurance)
- Table 46 — Exposure to high level of carbon monoxide
- Table 47 — Exposure to chemical agents at environmental concentrations (endurance)
- Table 48 — Conditions for exposure to pollutants
- Table 49 — Shock (operational)
- Table 50 — Impact (operational)
- Table 51 — Vibration, sinusoidal (operational)
- Table 52 — Vibration, sinusoidal (endurance)
- Table 53 — EMC, immunity (operational)
- 5 Testing, assessment and sampling methods [Go to Page]
- 5.1 Provision for tests
- 5.2 Test schedule
- Table 54 — Test schedule
- 6 Assessment and verification of constancy of performance (AVCP) [Go to Page]
- 6.1 General
- 6.2 Type testing
- Table 55 — Number of samples to be tested and compliance criteria
- 6.3 Factory production control (FPC)
- 7 Marking, labelling and packaging [Go to Page]
- 7.1 Marking concerning the multi-sensor fire alarm device
- 7.2 Content of the user manual
- 7.3 Additional marking of the radio frequency modules
- 7.4 Packaging
- Annex A (normative) Declaration of performance [Go to Page]
- Table A.1 — Declaration of performance
- Annex B (normative) Smoke tunnel for response value measurements
- Annex C (normative) Test aerosol for response value measurements
- Annex D (normative) Smoke measuring instruments [Go to Page]
- Figure D.1 — Mechanical construction of the measuring ionization chamber
- Table D.1 — List of parts of the measuring ionization chamber
- Figure D.2 — Measuring ionization chamber: Method of operation
- Figure D.3 — Measuring ionization chamber: Operating circuit
- Annex E (normative) Gas test chamber for CO response threshold value and cross-sensitivity to chemical agents
- Annex F (normative) Heat tunnel for heat response value [Go to Page]
- Figure F.1 — Example of working section of heat tunnel
- Figure F.2 — Arrangement of heat tunnel – Section A-A
- Annex G (normative) Calculation of the expected battery service life
- Annex H (informative) Examples for calculation of the expected battery service life
- Annex I (informative) Information about the requirements for the response to slowly developing fires [Go to Page]
- Figure I.1 — Linear compensation: limiting case
- Figure I.2 — Stepwise compensation: limiting case
- Figure I.3 — High-rate, limited-extent compensation
- Figure I.4 — Example of nonlinear transfer characteristic
- Annex J (normative) Apparatus for dazzling test [Go to Page]
- Figure J.1 — Dazzling apparatus
- Annex K (normative) Fire test room [Go to Page]
- Figure K.1 — Plan view of fire test room and position of multi-sensor fire alarms and measuring instruments
- Figure K.2 — Mounting positions for instruments and specimens on ceiling
- Figure K.3 — Side view of fire test room and position of wall-mounted multi-sensor fire alarms
- Annex L (normative) Open wood fire (TF1) [Go to Page]
- Figure L.1 — Wood arrangement for test fire TF-1
- Figure L.2 — Limits for m against y, Fire TF1
- Figure L.3 — Limits for m against time, t, Fire TF1
- Figure L.4 — Limits for S against time, t, Fire TF1
- Annex M (normative) Smouldering pyrolysis wood fire (TF2) [Go to Page]
- Figure M.1 — Arrangement of the sticks on the hotplate
- Figure M.2 — Limits for m against y, Fire TF2
- Figure M.3 — Limits for m against time, t, Fire TF2
- Figure M.4 — Limits for S against time, t, Fire TF2
- Annex N (normative) Glowing smouldering cotton fire (TF3) [Go to Page]
- Figure N.1 — Arrangement of cotton wicks
- Figure N.2 — Limits for m against y, Fire TF3
- Figure N.3 — Limits for m against time, Fire TF3
- Figure N.4 — Limits for S against time t, Fire TF3
- Annex O (normative) Open plastics (polyurethane) fire (TF4) [Go to Page]
- Figure O.1 — Limits for m against y, Fire TF4
- Figure O.2 — Limits for m against time, t, Fire TF4
- Figure O.3 — Limits for S against time, t, Fire TF4
- Annex P (normative) Liquid (heptane) fire (TF5) [Go to Page]
- Figure P.1 — Limits for m against y, Fire TF5
- Figure P.2 — Limits for m against time, t, Fire TF5
- Figure P.3 — Limits for S against time, t, Fire TF5
- Annex Q (normative) Low temperature black smoke (decalene) liquid fire (TF8) [Go to Page]
- Figure Q.1 — Limits for m against y, Fire TF8
- Figure Q.2 — Limits for m against time, t, Fire TF8
- Figure Q.3 — Limits for S against time, t, Fire TF8
- Annex R (normative) Establishing exposure levels of chemical agents
- Annex S (normative) Apparatus for impact test [Go to Page]
- Figure S.1 — Impact apparatus
- Annex T (informative) Information about the construction of the smoke tunnel [Go to Page]
- Figure T.1 — Smoke tunnel, working clause, side view
- Figure T.2 — Smoke tunnel, working section, cross-section A-A
- Annex U (informative) Information concerning the construction of the gas test chamber [Go to Page]
- Figure U.1 — Example of gas test chamber, side view
- Annex V (informative) Construction of the heat tunnel
- Bibliography [Go to Page]