SPECIFICATION
SECTION – EMERGENCY VOICE COMMUNICATION / PUBLIC ADDRESS / BACKGROUND MUSIC SYSTEM ( EVC / PA / BGM )
1.GENERAL
1.1The scope of work to be covered in this section shall include the supply, delivery, Installation, testing and commissioning and the final handing over of a flexible Emergency Voice Communication / Public Address / Background Music System as described herein this Specification.
1.2The works covered in this section is considered as specialist works; the
Tenderer shall seek competent specialist in this field to prepare submission
for the works as part of the overall communication tender submission.
1.3The Emergency Voice Communication System shall comply with
Cp25: 1999 “Code of Practice for Emergency Voice Communication
System in Buildings.”
2.SYSTEM REQUIREMENT
2.1A single semi-distributed system shall be supplied for the one-way Emergency Voice Communication, Public Address and Background Music System. The system shall be microprocessor controlled and shall be flexible and easy to operate. Specific functions shall be easily programmed and changed by non-technical personnel.
2.2The system shall fulfill the following requirements:
1)Clear, undistorted announcements to selected areas during public addressing.
2)Clear, undistorted paging to selected areas. This shall include over-riding of the volume controls, allowing emergency announcements to be heard at full volume.
3)Background music to selected areas when other functions are not selected
2.3The system shall be modular in design and comprise a basic system, which can be expanded by adding modular cards to meet the complete system requirement.
2.4The master central amplifiers and equipments shall be centralized into the Fire Control Central for central monitoring and reporting. Slave equipment shall be located in individual blocks. The cables between master and slave shall use network cable i.e. STP cable. Daisy chain from master, fist slave, second slave…to fifth slave at least.
2.5Switching of zones shall be carried out at input side, with each zone having its own amplifier, for all zones requiring background music so different zones can have their own selection of music, which shall be time-programmable and also having the capacity to match the number of speakers in the zone.
2.6A chime shall first be heard for those areas selected for public addressing, then followed by the announcement.
2.7Cables for the remote microphone paging stations shall be connected to the control system. These cables shall be supervised by the system for the disconnection/ fault of microphone paging system.
2.8The system shall be designed to handle different call stations and different commands in operation simultaneously, and also it shall have a system of priority to scope with conflict situation.
2.9It shall be able to be programmed for different priorities on different user keys of the call stations under conflict situation. Changes on priorities shall be possible by re-programming through the central equipment easily.
2.10Each call station shall be digitization, easy to operate and shall be expandable in zoning corresponding to the requirement.
2.11The call station shall have a gooseneck microphone complete with individual zones, floors, blocks, or entire building selection buttons, which shall be indicated in the drawings. LED display shall also be provided on the microphone to indicate the name of zones, blocks or whole building selection status. The press to talk button shall be programmable either press-hold while talking or by a simple touch to the talk button.
2.12The call station shall be provided with sufficient number of user keys.
2.13The system shall have the flexibility of allocating or changing zones to each user key by re-programming from central equipment. It shall be possible to select and programming different music inputs to the different group of building zones at different time. The background music shall be cut off to the selected zones during an announcement.
2.14The system shall be capable of delivering a minimum sound pressure level of 10 dB above the ambient noise in any areas of the building at the listening level of 1.5m above floor level.
2.15An articulation loss of consonants of less than 15% shall be maintained.
2.16The reinforced sound shall be distributed evenly throughout the listening area. Total variation in each area shall not exceed +/- 4 dB.
2.17The loudspeakers provided shall suit the requirements of each location and satisfy the requirements as mentioned herein this Specification.
2.18It shall be possible to select and program different music inputs either from cassette tape player, compact disc player or AM/FM tuner, to different zones including pre-programmable time settings for each music source for each zone with background music via the keyboard.
2.19All localized volume control shall be flush-mounted and shall be overridden when the emergency announcement is activated.
2.20A minimum spare of 20% for the rating of the localized volume control shall be provided.
2.21Localized volume control shall comply with the latest requirements and submit for approval.
2.22All input equipment such as microphone line amplifier, pre-amplifiers, chime
Units etc shall be of modular type such that in the event of any failure of these units. Unplugging the faulty unit and plugging in a new unit shall easily replace by new parts.
2.23The whole system shall be electronically supervised, to monitor all outgoing announcements and to indicate malfunctions including short and open circuits and grounds, in components and in each speaker circuit. Supervision shall include speaker lines, and amplifiers.
2.24An Auto Changeover Monitoring function embedded in the system controller, it shall be provided to constantly monitor via software the functioning of power amplifiers and shall automatically switch in a spare power amplifier case of failure of any of the amplifiers.
2.25Standby batteries shall be provided to power the sub-central emergency voice communication system in case of failure of the normal power supply. The batteries shall be kept fully charged by a permanently connected automatic boost/ trigger battery charger. The capacity of the batteries shall be sufficient to operate the whole system for not less than 4 hours. Its status should be monitored centrally at the security control room.
2.26Over-riding relays must be provided in rooms/ area with volume controller as shown in the drawings for cutting off Audio System and Public Addressing/ Emergency Voice System is activated. Supply, install, connect, test and commission the over-riding relays together with the Audio System shall be included in this tender.
2.27The microphone paging station at the Fire Control Central (FCC) and one remote microphone as in the drawing shall be able to make calls to any of the zone. They should able to page from the FCC room up to minimum of 30 zones and enable to expandable to 50 zones. The allocation of the zones to these 50 zones shall be user programmable at the main systems.
2.28All paging calls made whether from the FCC or another microphone the controller located in the FCC shall monitor. The call monitoring system shall be able to provide the following details:
1)Date of call made
2)Time for start of call
3)Time for end of call
4)The paging microphone station identification
5)The zones called
To a maximum of 2000 events can be stored in memory.
2.29The FCC paging station shall have highest priority over all other paging stations. Reprogramming via controller shall easily change the priority allocation for all paging stations. The sound output of a selected output zone can be monitored using the Amplifier Monitoring Panel or Remote Microphone.
2.30All the control and monitoring system components should be modular in design and shall be easily expandable.
2.31The control and monitoring system in each speaker line shall be monitored for its healthiness centrally if the line short, open or leakage.
2.32The fault monitoring function in the FCC shall be able to perform at least the following function:
1)Fault status for any microphones and paging system.
2)Fault status reporting of each control system including each local message card which shall indicate the malfunctioning/ error of each input and output connection.
3)Fault status reporting of all loudspeaker circuits/ zones.
4)Fault status reporting of each amplifier e.g. overheat, power and amplification circuitry.
The reporting shall detail the location/ description of the device.
2.33The 19” equipment rack must come with self-ventilating fan units.
2.34The system shall able to record alarm messages in digital format.
2.35The system shall consist of a Digital Message Recorder /Playback Unit. It able to response external message triggering minimally 8 makes contacts to a maximum of 256 contacts. An interface unit which convert makes contact to binary code is required if the system requires more than 8 types of messages.
3.EQUIPMENTS
All equipment such as power amplifiers and its ancillary equipment shall be mounted onto a proper equipment rack. All input units shall be of an interchangeable modular type such that the individual modules can be mounted in mixer frames, or in mixer power amplifiers. All system and peripheral units shall be properly matched with the equipment rack and provided compact and neat installation.
The following performance of the equipment for the system shall comply with the followings:
4.BASIC SYSTEM
4.1The basic system shall included but not limited to the following:
1)19 inch rack
2)Public Address System Matrix Manager
3)Remote Microphone & its Extension
4)Remote Microphone Input Module
5)Audio Input Module with/without Control Input
6)Surveillance Frame
7)Control Input Module
8)Control Output Module
9)Power Amplifiers and its Input Module
10)Power Supply Frame and Power Supply Unit
11)Termination board
12)Minimum PC System (Optional)
13)24 pin Dot-matrix printer (Optional)
14)Software of System Manager
Sufficient quantity of the above items shall be provided to meet the functional and operational requirements of a complete Emergency Voice Communication/ Public Address/ Background Music System installation.
4.2Matrix System
The PA/EVC System shall be matrix type, which allows different audio sources broadcast to different output zones simultaneously
-It shall connect up to 15 nos. of audio inputs
-It shall come with built-in 4 nos. of chime which to be used for the pre-/post-announcement chime
-It shall connect up to 2 nos. of Pre-recorded Message card, which provide 2 channel of Pre-recorded messages (up to 16 nos. of pre-recorded messages)
-The maximum audio output for the system shall be 50 nos.
-The maximum control inputs for the system shall be 128 nos.
-The maximum control outputs for the system shall be 128 nos.
4.3Operation Modes
The PA/EVC system shall come with 2 operation modes: Emergency and Normal. Emergency Mode will normally activated by Fire Alarm or AC Mains failures. In case of emergency, the general type remote microphones shall be disabled automatically, only the emergency type remote microphones can make announcement. The Emergency Mode shall be activated and reset by Control input or Remote Microphone.
4.4Drive Modes
The PA/EVC system shall come with 2 drive modes: Normal and Economy. When the system is operated in Economy Mode, the power amplifiers shall be always in standby mode when there is no BGM or paging, which will in turn save the energy. The drive mode shall be set through the system software.
4.3System Availability
-The PA/EVC System shall be available all the time
-The PA/EVC System shall be available within 10 seconds after supplying power to the system.
-The PA/EVC system shall perform self-checking automatically e.g. System's main CPU, AC mains, connections between components, Pre-recorded Message Cards, Power Supply and Backup Batteries, etc.
-Critical Signal Path (from Fireman's Remote Microphone's mic to speaker circuit) shall be monitored by the system
4.4Failure Signalization
-Failure shall be indicated automatically at an designated place
-Failure detected shall be reported to the pre-programmed destinations within 100 seconds
-Failure shall be indicated acoustically and visually
-Failures shall be programmed as individual or group of fault
-Programming of destination and failure shall be done through system software
-Failure destinations shall be on Remote Microphone, through control outputs or in the monitoring software
-A receipt button or a reset button must be available
4.5Audio Inputs
Audio sources include minimum but not limited to the following equipment:
-Tuner
-Cassette Player
-Microphone (Dynamic or Condenser Microphone)
-Paging Console
-System's Remote Microphone
Audio sources include minimum but not limited to the following types:
-Balanced
-Unbalanced
-Mono
-Stereo
-Mic Level (-60dB)
-Line Level (-20dB)
Audio sources include minimum but not limited to the following connectors:
-XLR
-RCA
-Phoenix
-Phone Jack
Audio Outputs
-Audio output from the matrix system shall be 0dB
-The PA/EVC system shall allow the output zones to be grouped for easy operation
-Each Audio Output shall come with optional Equalizer Card for adjustment of sound quality, which is most suitable for those area which require high sound quality and the room acoustic make it difficult to achieve
4.6Control Inputs
-The PA/EVC system shall come with 16 control inputs which is further expandable up to 128 control inputs
-The Control Input shall be used to activate minimum but not limited to the following:
Interrupt Broadcast to free-programmable zones
Pre-recorded Message Broadcast to free-programmable zones
BGM Broadcast to free-programmable zones
BGM Broadcast End
Control Output
Audio Monitor of free-programmable zone
Volume Up for free-programmable Audio Input or Audio Output
Volume Down for free-programmable Audio Input or Audio Output
Failure Acknowledgement
Failure Reset
Emergency Activation
Emergency Reset
Time Adjustment
Failure Display Input
4.7Control Outputs
-The PA/EVC system shall come with 16 control outputs, which is further expandable up to 128 control outputs
-Control Outputs shall be able to be triggered by Control Inputs, Remote Microphone Buttons and Timer Schedules
4.8Priority
The PA/EVC system shall come with 4 levels of priority, in which the Emergency Microphone has the highest priority, followed by Emergency Messages, General Type Remote Microphones & Messages, then BGM which shares the lowest priority.
In case of more than one audio sources fall into the same level, either Priority, First In First Out (FIFO) or Last In First Out (LIFO) shall be assigned to each audio source to avoid confliction.
4.9Initial Volume
The initial volume of Audio sources and output zones shall be set in the system software
4.10Real-time Clock and Timer Schedules
-The PA/EVC system shall come with real-time clock and timer schedules
Real-time clock and timer schedules shall be set in the System Software and downloaded to the PA/EVC System
-Real-time clock shall be adjustable through the control input, which allows the PA/EVC System to be connected to Master Clock System for time synchronization
-Timer Schedules shall consist of Day Program, Week Program and Holiday Program. Up to 10 Day Programs and 40 Holiday Programs shall be available in the System
-Timer Schedules shall be used to trigger BGM, Interrupt Broadcast, Pre-recorded Message Broadcast, Volume Up/Down and Control Output Activation, etc.
4.11Summer Time Feature
The PA/EVC system shall come with the Summer Time feature, which will advance 1 hour for the internal clock and timer.
The summer time feature shall be set in the system software or through hardware switch
4.12Power Amplifier Monitoring
The PA/EVC system shall come with the power amplifier monitoring and standby amplifier auto-switchover circuit, in case of any one of the power amplifier failure, the standby amplifier shall take over the faulty one automatically
Each standby amplifier shall cater for up to 10 nos. of amplifiers.
Amplifier Monitoring shall not interrupt/stop the normal system activities, e.g. announcement or BGM, etc.
4.13Speaker Line Monitoring
The PA/EVC system shall come with the speaker line monitoring circuit, it shall have both pilot tone monitoring and impedance checking methods, to allow easy installation of speaker and speaker cables.
Signals for Pilot Tone Monitoring and Impedance Checking shall be superimposed on the audio signals and distributed to speaker lines
Impedance Checking Method shall bypass the volume control to get the correct speaker line impedance
Speaker Line Monitoring shall not interrupt/stop the normal system activities, e.g. announcement or BGM, etc.
4.14Remote Microphones
The PA/EVC System shall come with minimum but not limited to the following -System Remote Microphones:
-Fireman's Remote Microphone
-Standard Remote Microphone
Fireman's Remote Microphone shall come with minimum but not limited to the following:
-Alarm Button to activate alarm, Alarm Button is protected by a lift-up cover to prevent accidental alarm activation
CPU-off Switch, which enable the Fireman's Remote Microphone to make an ALL-Call Announcement even when the system main CPU is down