GB 8108-2014 PDF English
US$160.00 · In stock · Download in 9 secondsGB 8108-2014: Vehicle electronic sirens Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB 8108: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 8108-2014 | English | 160 |
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Vehicle electronic sirens
| Valid |
| GB 8108-1999 | English | 439 |
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4 days
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Vehicle-used electronic siren
| Obsolete |
| GB 8108-1987 | English | RFQ |
ASK
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3 days
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Performance requirements and test methods for alarm unit on vehicle
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB 8108-2014
GB 8108-2014: Vehicle electronic sirens---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB8108-2014
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.320
A 91
Replacing GB 8108-1999
Vehicle electronic sirens
Issued on. DECEMBER 05, 2014
Implemented on. JULY 01, 2015
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 6
4 Classification and naming... 6
5 Requirements... 7
6 Test methods... 11
7 Installation... 17
8 Inspection rules... 17
9 Markings, certificates, packaging... 19
References... 21
Foreword... 4
1 Scope... 6
2 Normative references... 6
3 Terms and definitions... 7
4 Classification and naming... 7
5 Requirements... 8
6 Test methods... 12
7 Installation... 18
8 Inspection rules... 18
9 Markings, certificates, packaging... 20
References... 22
1 Scope
This standard specifies the classification, requirements, test methods,
installation, inspection rules, markings, certificates, packaging for electronic
sirens installed on police cars, fire engines, ambulances, engineering rescue
vehicles.
This standard applies to electronic sirens installed on police cars, fire engines,
ambulances, engineering rescue vehicles.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 2423.1 Environmental testing for electric and electronic and electronic
products - Part 2.Test methods - Tests A. Cold
GB/T 2423.2 Environmental testing for electric and electronic products - Part
2.Test methods - Tests B. Dry heat
GB/T 2423.3 Environmental testing for electric and electronic products - Part
2.Testing method - Test Cab. Damp heat steady state
GB/T 2423.6 Environmental testing for electric and electronic products - Part
2.Test methods - Test Eb and guidance. Bump
GB/T 2423.10 Environmental testing for electric and electronic products -
Part 2.Tests methods - Test Fc. Vibration (sinusoidal)
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Reference plane
When the sound pressure level of the speaker is tested, the plane directly in
front of the sounding direction and perpendicular to the ground.
3.2
Reference axis
A line perpendicular to the reference plane and through a single speaker’s
sounding system center or array speaker’s geometry center.
3.3
Reference point
The intersection of the reference plane and the reference axis.
4 Classification and naming
4.1 Classification
Electronic sirens (hereinafter referred to as sirens) may be divided into integral
type and split type according to the structure.
4.2 Naming
The requirements for the model naming of siren are as follows.
5 Requirements
5.1 Requirements for appearance and structure
5.1.1 The surface of the siren shall be free of rust. The coating shall be free of
flaking or air bubbles. The surface shall be free from obvious mechanical
damage such as scratches, cracks, breakage. The fastening parts are not loose.
5.2 Electrical components
5.2.1 Power supply
The power supply shall meet the following requirements.
5.2.2 Conductor
The flame-retardancy of the conductor used in the siren shall comply with the
requirements of GB/T 19666.The positive conductor of the power line shall be
marked in red and the negative conductor shall be marked in black.
Customized by enterprise
5.2.3 Wiring
The inner conductor of the siren shall be protected, to ensure that the conductor
does not come into contact with parts that may cause insulation damage to the
conductor. When the conductor is to pass through the metal hole, the metal
hole shall be chamfered and shall not have sharp edges; meanwhile it shall add
jacket to the metal hole.
5.3 Requirements for basic functions
5.3.1 The control buttons, knobs, other mechanisms of sirens shall be operated
normally. The corresponding tone and function shall be normal.
5.3.2 The contents of the microphone shall be clearly identifiable, without noise
or whistling.
5.4 Performance requirements
5.8 Constant-temperature-and-humidity performance
The siren shall work normally and have no electrical faults in a constant-
temperature-and-humidity environment.
5.9 Rainproof performance (only for speakers and outdoor open-air sirens)
The siren shall be able to withstand the rain test. It shall work normally and
without electrical faults during and after the test.
5.11 Vibration-resistance
The siren shall be able to withstand the vibration test. During and after the test,
it shall be able to work normally and without electrical failure. There shall be no
permanent structural deformation.
5.12 Impact-resistance
The siren shall be able to withstand the impact test. During and after the test, it
shall be able to work normally and without electrical failure. There shall be no
permanent structural deformation.
6 Test methods
6.1 Test conditions
6.1.1 General test environment
If not stated in the relevant provisions, each test shall be carried out under the
following atmospheric conditions.
6.1.2 Acoustic test environment
The acoustic environment for the test shall comply with the requirements of
GB/T 3767.
6.1.3 Test voltage
If not stated in the relevant provisions, each test shall be carried out at the
following test voltage.
6.2 Inspection of appearance and structure
Visually inspect the surface and structure of the siren, to check whether the text
symbols and signs are standardized.
6.3 Inspection of electrical components
6.3.1 Inspection of power supply
The inspection of power is performed as follows.
6.3.3 Inspection of wiring
Visually inspect the siren’s wiring, wiring protection, etc.
6.4 Inspection of basic function
Operate each control button and knob of the siren to check whether they work
normally. Turn on the siren to check each tone state and the speaking quality
of microphone.
6.5 Test of performance requirements
6.5.1 Test of output power
Connect the siren’s controller, the microphone and the equivalent load which
replaces speaker in the normal working mode.
6.5.3 Test of pure tone inspection of speaker
Feed the speaker with a sinusoidal voltage equivalent to 1/2 of the rated power.
At three frequency points of 500 Hz, 1000 Hz, 1500 Hz, detect the sound
emitted by the speaker. The detection distance is 2 m.
6.5.4 Test of sound pressure level
6.5.4.1 Test device
The sound level meter used for the test shall meet the requirements of GB/T
3785.1.Its accuracy is grade-I.
6.5.6 Test of harmonic distortion
Install the microphone on the test frame according to the normal use state. The
sound input hole of the microphone shall be on the axis of the simulation port
and 40 mm away from the simulated lip-ring. Turn on the siren’s power. Adjust
the volume adjustment knob to the maximum position. The microphone’s
excitation sound pressure level is 94 dB. The measurement frequency is 1000
Hz. Measure and record the total harmonic distortion of the siren’s controller
and microphone at 1000 Hz.
6.6 Test of electrical performance
6.6.1 Test of power adaptability
For sirens which have a nominal voltage of DC12 V, respectively supply power
at DC9.0 V ± 0.2 V and DC16 V ± 0.2 V. Use the method as specified in 6.5.4
to test the sound pressure level on the reference axis of the siren.
6.7 High-temperature test
6.7.1 Test device
The test device shall comply with the requirements of GB/T 2423.2.
6.7.2 Test method
Connect the siren’s controller, microphone, speaker into a complete system.
Pace it in the high-temperature test chamber. Follow the steps below.
6.8 Low-temperature test
6.8.1 Test device
The test device shall meet the requirements of GB/T 2423.1.
6.8.2 Test method
Connect the siren’s controller, microphone, speaker into a complete system. In
the unpowered state, place it in a low-temperature test chamber. Follow the
steps below.
6.14 Test of continuous operation reliability
Place the siren in a room temperature environment. After power-on, select one
of the tones and adjust the siren’s volume adjustment knob to the maximum
position, to carry out 200 cycles of test. In each cycle, the siren will work
continuously for 30 minutes and then off for 30 minutes.
7 Installation
The installation of the siren on the vehicle follows the following principles.
8 Inspection rules
8.1 Type inspection
The type inspection of the siren is carried out in the following cases.
8.2 Exit-factory inspection
The exit-factory inspection shall be carried out by the quality inspection
department of the production enterprise according to the items as specified in
Table 3.
9 Markings, certificates, packaging
9.1 Marking
9.1.1 Product marking
The shell of the siren shall have clear, durable and hard-to-remove marking,
which shall include the following. name and trademark of manufacturer,
product’s Chinese name, specification model number, product’s number or
batch number.
9.2 Inspection certificate
Each exit-factory siren shall have a product inspection certificate. The
inspection certificate shall have the following contents.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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