All equipment for shared broadcasting shall comply with the provisions of CCCF certification of fire protection products..
Public places should be equipped with fire sound alarm with the same fire tone change sound; Schools, factories and other places where electric bells are used daily shall not use the alarm bell as a fire alarm.
The A-weighted sound pressure level of emergency broadcast shall be greater than 60dB at the maximum setting distance claimed by the speaker manufacturer and 1.5m ~ 1.6m from the ground.
Silencing function; 5.
loudspeaker commissioning 4.12.5 the broadcasting function of the loudspeaker shall be checked and recorded, and the broadcasting function of the loudspeaker shall comply with the following provisions: 1.
5 the graphic display device of the fire controller shall display the fire alarm signal of the fire alarm controller and the start signal of the fire linkage controller, and the displayed information shall be consistent with the display of the controller.
Ⅳ linkage control and commissioning of fire alarm and fire prevention emergency broadcasting 4.12.6 article 4.8.12 of the current national standard code for design of automatic fire alarm system (gb50116-2013) stipulates that when the fire emergency broadcasting is used together with ordinary broadcasting or background music broadcasting, it shall have the function of forcibly switching into the fire emergency broadcasting.
Self inspection function; 2.
The control equipment is the equipment for emergency broadcasting by controlling the power amplifier and loudspeaker in case of fire or accident.
Special attention shall be paid to the emergency broadcasting mode in the daily broadcasting or background music system where the loudspeaker is equipped with a switch or volume regulator.
In case of fire, there are generally two control switching modes to forcibly turn the daily broadcast or background music system loudspeaker into the fire accident broadcast state: (1) The fire emergency broadcasting system only uses the speakers and feed lines of the daily broadcasting or background music system, while the amplifiers and other devices of the fire emergency broadcasting system are special.
4.12.7 during the inspection of linkage control function, the priority function of manual insertion operation of the system shall be checked and recorded when all fire audible and visual alarms or loudspeakers in the alarm area are working continuously.
Ⅳ fire alarm and fire emergency broadcast control commissioning 4.12.6 the broadcast control equipment shall be connected with the fire linkage controller to make the fire linkage controller in automatic state.
(2) The fire emergency broadcasting system uses the amplifiers, feed lines, loudspeakers and other devices of the daily broadcasting or background music system.
Manually operate the fire alarm or fire emergency broadcast start control buttons and keys on the bus control panel of the fire linkage controller, and all fire audible and visual alarms or loudspeakers in the alarm area shall restore the alarm or emergency broadcast.
Emergency broadcast start function; 6.
Article description I fire alarm commissioning 4.12.1 the automatic fire alarm system shall be equipped with fire audible and visual alarms, and all fire audible and visual alarms in the building shall be started after the fire is confirmed.
In case of fire, the output lines are switched in the fire control room to make the fire emergency broadcasting system play the emergency broadcasting according to the regulations.
Automatic conversion function of main and standby power supply; 3.
Later, it will be classified by design specifications, construction acceptance criteria and measurement and valuation matters.
3 when the fire emergency broadcasting system is shared with the ordinary broadcasting or background music broadcasting system, the fire emergency broadcasting control device shall stop normal broadcasting.
For the automatic fire alarm system without fire linkage controller, the fire audible and visual alarm shall be controlled by the fire alarm controller; The automatic fire alarm system with fire linkage controller shall be set, and the fire audible and visual alarm shall be controlled by the fire alarm controller or fire linkage controller.
According to the official account of more than one year, the spinach will be revised completely.
Attention shall be paid to the above two control modes so that the fire emergency broadcast can be turned on in an emergency no matter whether the loudspeaker is closed or playing.
In case of fire, the daily broadcasting or background music system can be turned on remotely and the fire emergency broadcasting can be put into force.
According to the provisions of the system linkage control logic design document, the linkage control function of the fire alarm and fire emergency broadcast system shall be checked and recorded, The linkage control function of fire alarm and fire emergency broadcasting system shall comply with the following provisions: 1.
4.12.2 the sound alarm of fire alarm has attenuation during transmission, so the sound pressure level shall be measured at the maximum setting distance claimed by the manufacturer.
III speaker debugging 4.12.5 when setting fire emergency broadcast speakers in places with high environmental noise, such as industrial buildings, considering the factors such as high background noise and complex environmental conditions, the sound pressure level requirements are put forward: for speakers set in places with environmental noise greater than 60dB, the sound pressure level at the farthest point within its effective playing range shall be 15dB higher than the background noise.
Manually operate the fire alarm or fire emergency broadcast stop control buttons and keys on the bus control panel of the fire linkage controller, and all fire audible and visual alarms or loudspeakers in the alarm area shall stop the ongoing alarm or emergency broadcast; 2.
III.
The construction acceptance specification of fire emergency broadcasting this time focuses on the recording basis for the commissioning of fire broadcasting, combined with yesterday’s technical standard for public broadcasting system engineering and today’s III speaker commissioning, spinach understanding, 9-5-9 commissioning content focuses on the acoustic performance of broadcasting, such as sound clarity and sound effect under ambient noise, Make the fire broadcasting meet the design requirements.
When the ambient noise is greater than 60dB, the A-weighted sound pressure level of emergency broadcast shall be 15dB higher than the background noise.
II commissioning of fire emergency broadcast control equipment 4.12.4 a complete fire emergency broadcast system usually includes control equipment, audio power amplifier, microphone, loudspeaker, broadcast distribution device, power supply device, etc.
Basis 1: Standard for construction and acceptance of automatic fire alarm system gb50166-2019 > II commissioning of fire emergency broadcast control equipment 4.12.4 connect the loudspeaker of each broadcast circuit with the fire emergency broadcast control equipment, turn on the power supply to make the broadcast control equipment in normal working state, check and record the following main functions of the broadcast control equipment, and the functions of the broadcast control equipment shall comply with the current national standard fire linkage control system Gb16806: 1.
The priority function of manual insertion operation of the system shall comply with the following provisions: 1.
Two fire detectors that meet the triggering conditions of linkage control in the alarm area, or one fire detector and one manual fire alarm button shall send out fire alarm signals.
On site language broadcasting function; 7 emergency broadcast stop function.
After continuous operation for 8s ~ 20s, all fire audible and visual alarms shall stop alarm at the same time; 2) After the alarm is stopped, all loudspeakers shall conduct one to two fire emergency broadcasts at the same time.
After each broadcast for 10s to 30s, all loudspeakers shall stop broadcasting information.
The fire emergency broadcast control equipment shall be operated to make the loudspeaker play emergency broadcast information; 2.
The loudspeaker shall be forcibly switched to the fire emergency broadcasting line with a relay.
The voice information shall be clear; 3.
2 the fire linkage controller shall send the start signal of the action of fire alarm device and emergency broadcast control device, and light the start indicator.
Only the emergency broadcasting device is set in the fire control room.
When the fire alarm is equipped with voice prompt function, the voice synchronizer shall be set at the same time.
4 all fire audible and visual alarms and loudspeakers in the alarm area shall work alternately according to the following provisions: 1) All fire audible and visual alarms in the alarm area shall be started at the same time.
Fault alarm function; 4.
Its main function is to report the fire to the on-site personnel, command and guide the on-site personnel to evacuate.
