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EN 60849

V. V. enaS. EN 60849. Main Requirements of. Sound Systems for Emergency Purposes. ~. ~. Alarm tone generator. ampli- fire. Line. Loud- speaker. Definitions. A Few Definitions [3] “Alarm a signal, or condition, warning of an emergency” e.g.: evacuation advice “Warning

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EN 60849

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  1. V V enaS EN 60849 • Main Requirements of Sound Systems for Emergency Purposes

  2. ~ ~ Alarm tone generator ampli-fire Line Loud-speaker Definitions • A Few Definitions [3] • “Alarm • a signal, or condition, warning of an emergency” • e.g.: evacuation advice • “Warning • important notice concerning any change of status which demands attention or activity “ • e.g. hint that an emergency may happen • “Critical Signal Path • all components and interconnections between every emergency broadcast initiation point and the input terminals on, or within, each loudspeaker enclosure.” BMZ

  3. Requirements on the Apparatus’s • Concerning the manufacturer

  4. Operation Availability • Continuous Availability [4.1b] • The PA system shall be available all times • Availability within 10 seconds after supplying power to the system [4.1c] • primary or secondary power • Maximum 3 Seconds from initiation until first emergency broadcast [4.1d] • including reaction time of the detection system

  5. Emergency Priorities [4.3] • Manual Alarming/Warning/Restoration • >automatic Alarming (evacuation) • >automatic Warning • >no emergency: operational messages (e.g. for system check)

  6. Manual Intervention • If the voice alarm system is capable of operation in fully automatic mode, a manual intervention shall always be possible [4.3.2] • starting and stopping of prerecorded alarm messages [4.3.2a] • selection of appropriate prerecorded alarm messages [4.3.2b] • when using specific emergency messages, indication of which message and their relation to zones must be displayed [5.2.d] • paging by using the emergency microphone (if any) [4.3.2d] • selection of zones for prerecorded message or paging [4.3.2c]

  7. Automatic Status Indication • „A clear indication shall automatically be given at the designated control locations of:“ [5.2] • (the designated control location can be the fireman‘s microphone) • “system availability“ [5.2 a] • “power supply availability “ [5.2 b] • “any fault condition“ [5.2 c] • systems with several zones: current message broadcast into which zones:Alert, Evacuation, paging

  8. Failure Indication (1) • Indication of Failures [5.3] • Failures must be indicated automatically at an designated place (e.g. main system) • The failure shall be indicated within 100 seconds after occurrence. • The failure shall be indicated acoustically and visually. • A receipt button and a Reset button must be available.

  9. Failure Indication (2) • Indication [5.3] • Visual and acoustic indication • tone of 0.5 seconds duration, min. once within 5 seconds • permanent or flashing visual indicator • Manual reception by personal • tone disappears • visual indicator remains / changes to permanent on • Reset of failure indication after failure recovery • visual indicator extinguishes automatically - or - • visual indicator extinguishes after manual Reset • visual indicator shall extinguish after failure recovery ! • Acoustic tone must start again when other failure detected

  10. Surveillance (1) • An automatic Surveillance must indicate each detected failure • The surveillance system tests • Components of the “critical signal path “ (sources, amplifiers, cables etc.) • the power supply • primary supply [5.3a] • secondary supply [5.3b] • battery charger [5.3c] • failure of protection circuits which may prevent the an emergency broadcast • e.g. fuse, circuit breaker, isolator [5.3d] • control circuits (processor etc.)

  11. Surveillance (2) • Failure of elements of the critical signal path • failure of microphone [5.3e] • (voice coil, pre-amplifier, wiring) • failure of the critical signal path through amplifiers [5.3f] • missing of amplifiers or critical modules [5.3g] • failure of standby amplifier[5.3h] • failure of tone generator or message memory [5.3i] • failure of speaker circuits[5.3j] • (short circuit, break) • failure of connection between decentralised systems [5.3 o] • failure of connection between PA system and emergency detection system • usually this surveillance is done by the emergency detection system [5.5]

  12. Monitoring of the Microphone • Methods of Microphone Monitoring • electrical monitoring : • Disadvantage: conversion from sound to voltage can not be monitored, e.g. when the diaphragm is damaged • Acoustic monitoring • a speaker send an acoustic signal to the capsule • the acoustic and electric function of the capsule is monitored  very safe method !

  13. audio + pilot tone (low frequency) Monitoring Speaker Circuits (1) • 1. Impedance Monitoring (used often) impe-dance measuring • connection of different 100 volts speakers possible • star wiring possible • expansion of old systems possible

  14. audio + test signal (high frequency) Monitoring Speaker Circuits (2) • 2. Loop Back pilot tone detector • connection of different 100 volts speakers possible • line must be installed from speaker to speaker • line back necessary

  15. end of line unitEOL audio + pilot tone (high frequency) pilot tone detector, EOL receiver Monitoring Speaker Circuits (4) • 3. End-of-Line Check • connection of different 100 volts speakers possible • only single line back necessary (third wire of shield can be used if available) • line must be installed from speaker to speaker

  16. Evacuation Message Memory • Safety Against External Influence • Prerecorded messages and eventually attention-drawing signals • must be stored in a non-volatile memory (solid state memory, no mechanical devices) [4.2i] • availability must be monitored continuously • external sources shall not be able to corrupt or derange the store or its contents

  17. Requirements On The Installation • concerning the installer

  18. Interface With Emergency Detection System [5.5] • Continuous Monitoring • The communication link between the emergency detection system and the sound system is normally monitored by the emergency detection system • Notifications to the Emergency Detection System • The sound system must transfer minimum one fault information (any failure)to the emergency detection system

  19. Retaining Functions • Redundant Facilities • Retaining the Power [4.1m] • an emergency power supply must be installed always • Retaining the Broadcast [4.1g] • „Failure of a single amplifier or loudspeaker circuit shall not result in total loss of coverage in the loudspeaker area served.” • architecture of the speaker circuit • configuration power amplifiers • Exception: regional directives for small buildings

  20. Emergency Power Supply • Battery’s Capacity [5.6] • Loss of AC mains at evacuation: • double evacuation time • minimum 30 minutes for emergency mode • Loss of AC mains without evacuation : • minimum 24 hours (normal operation) • When a building is not used for a longer period (e.g. weekend), then the system must be capable to operate the emergency mode for minimum 30 minutes after re-occupation of the building(e.g. 72 hours standby plus 30 minutes emergency mode)

  21. A B standby switch line cut switch standby amplifier Retaining of Broadcast (1) • Electrical Solution: A/B-Wiring • Two-Line System • In case of failure of one line, the other line still serves the remaining speakers A/B-wiring with 2 amplifiers A/B-wiring with standby amplifier

  22. A B A B Retaining of Broadcast (2) • Acoustic Solution: • Connection of speakers by turns on the lines A and B in each direction • In case of a line’s failure, the speaker area keeps served adequate (small gaps of coverage only) Example: wide area Example: corridor

  23. sound pressure level 120 dBA maximum level of att. drawing 6 - 20 dBA background noise 75 dBA minimum rest areas 65 dBA minimum Sound Pressure Level • Attention-Drawing Signals[Annex C] • minimum: 65 dBA, in rest areas: 75 dBA • 6 - 20 dBA above background noise • maximum: 120 dBA • the sound pressure levels of all relevant areas must be confirmed and being documented [7.2 a] z.B. 100 dBA z.B. 90 dBA

  24. Intelligibility • Intelligibility of Messages • The Intelligibility of messages must be equal or higher than 0.7 CIS (common intelligibility scale; STI: 0,5) [5.1] • This value must be obtained in each area [5.1] • In a difficult acoustic environment, it is preferable to carry out an acoustical simulation • Measuring and Documentation of Intelligibility • Confirmation of intelligibility must be documented [7.2 a] • Application of acknowledged with restrictions [Annex A] • Correlation curves to CIS in [Annex B] • A specialised company may measure the intelligibility

  25. Alarm Signals • Attention-Drawing Signal • minimum one suitable attention-drawing signal before message (refer to EN 457) [4.1 e] • Distinguishable attention-drawing signals at different emergency cases [4.1 h] • Attention-Drawing Signals and Messages [4.1 h] • attention-drawing signal before message, 4-10 seconds • duration of attention-drawing signal and messages until change or end of evacuation • max. 30 seconds between different messages • pauses > 10 seconds: attention-drawing signal

  26. Documentation (1) • Operation Manual [7.1] • must be quickly available(preferable at each operation place) • Contents: • practical operation of the system • action to be taken in case of system failure • Performance • graphically if possible • in preferred language • bound document (copy)

  27. Documentation (2) • System Documentation [7.2a] • To be kept by User or Maintenance Company • Contents: • locations of each part of the devices • measuring results of the system • Impedance of each speaker circuit • set values (when adjustable, e.g. volume) • sound pressure level(s) • intelligibility

  28. Documentation (3) • Maintenance Instructions [7.3.2] • To be kept by User or Maintenance Company • Contents: • Maintenance procedures (order of works) • Maintenance intervals • Parts for maintenance, spare parts, special tools • Suppliers • eventually test certificates

  29. Requirements on the Operation • concerns the user

  30. Documentation (4) • Log Book [7.2b] • Responsible person must take care on it • Contents: • details of all emergency cases • details of tests and routine checks • details of occurred failures and the repair

  31. Security of Operation • Maintenance [7.3.1] • should be done twice a year (maintenance and test) • to be carried out by competent person • Responsible person [4.2] • nominated by owner • is responsible for maintenance • must be trained • manages the log book

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