This standard specifies the definition, requirements, test methods and acceptance rules for computer sites. This standard is applicable to sites for all types of computer systems. Sites for other electronic equipment systems can refer to this standard. GB/T 2887-2000 General Specification for Computer Sites GB/T2887-2000 Standard download decompression password: www.bzxz.net

GB/T 2887—2000
The differences between this version and GB/T2887—1989 are that, in addition to reducing the chapters on site selection, corrosive gases and test methods, there are some changes in the following chapters:
! (Changes in expression)
4.2.2 (enlarged area)
4.3.1.3 Delete C level in Table 1 and Table 2)
4.3.1.4 (increase)
4.3.3 (increase in illumination);
4.3.4 (decrease by 5dBA);
4.4.1c) (increase);
4.4.2 No classification, expressed in words),
-4.5.2 Table 3 Voltage waveform distortion rate cancels the \ soil \ number; 4.9.2 (increase)
This standard will replace GB/T2887-1989 from the date of entry into force. This standard is proposed by the Ministry of Information Industry of the People's Republic of China. This standard is under the jurisdiction of the China Electronic Technology Standardization Institute. The drafting units of this standard are: North China Institute of Computing Technology, China Electronics Technology Standardization Institute, China Computer Room Facilities Engineering Company, China Electronics Engineering Design Institute, Beijing Great Wall Electronic Computer Room Technology Joint Development Company. The main drafters of this standard are: Yu An, Wang Lijian, Wang Yuanguang, Wang Xiguang, Xu Zonghong, Han Jun, Huang Meirong, Chen Jing. This standard was first issued in 1982 and revised for the first time in 1989. 479
1 Scope
National Standard of the People's Republic of China
General Specification for Electronic Computer Field
Specification for electronic computer field This standard specifies the definition, requirements, test methods and acceptance planning of electronic computer field GB/T 2887—2000
Replaces GB/T 2887-1989
This standard applies to the fields of various types of electronic computer systems, and the fields of other electronic equipment systems can refer to this standard for implementation. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T9361-1988 Safety requirements for computer sites GB50034-1992 Industrial enterprise lighting design standards SJ/T10796--1996 Technical conditions for antistatic raised floors for computer rooms 3 Definitions
This standard adopts the following definitions.
3.1 Power-on
The computer is powered on.
3.2 Power-off
The computer is powered off.
3.3 Lighting
Lighting set to illuminate the entire assumed work surface without considering special department needs. 3.4 Emergency lighting
Lighting for temporary continuation of work or evacuation of personnel when normal lighting is extinguished due to a fault. 3.5 Grounding
The relationship between the DC ground, AC working ground, safety protection ground and lightning protection ground of the computer system and the earth. 3.6 Computer system DC groundcomputersystenDCgroundThe logical reference ground of the computer itself.
3.7 Computer system AC working groundcamputersystemACgroundThe AC working ground used by the computer system itself. 3.8 Power system AC working groundpowersystemACgraundIn the power supply system, in addition to the AC working ground used by the computer system itself, the AC working ground required for power supply operation. 3.9 Safety protection groundsafetyprotection earthThe metal shell of power equipment may be charged due to insulation damage. The grounding is set to prevent this voltage from endangering the safety of people and equipment.
3.10 Lightning protection groundthunderproof protectiongroundApproved by the State Administration of Quality and Technical Supervision on January 3, 2000176
Implemented on August 1, 2000
The grounding is set to prevent lightning strikes.
3.11 Earthing resistance earthing resistance GB/T2887—2000
The sum of the resistance of the ground body or natural ground body to the ground and the resistance of the ground wire. 3.12 Uninterrupted power supply system uninterrupted power supply system The power supply system that ensures that the computer does not stop working. 3. 13 Net height
The height from the surface of the raised floor or the ground surface where the equipment is installed to the ceiling. 3.14 Still pressure box Still pressure box In the air conditioning system, the space under the floor or above the ceiling in the air conditioning room, where air is supplied or returned to the room. 3.15 Computer room computer room
The place where the main equipment of the computer system is placed. 3.16 Raised floor raised floor
The floor installed in the electronic computer site that can be flexibly disassembled and assembled. 3.17 Electronic computer field The place where the electronic computer system is placed, with supporting facilities such as power supply and air conditioning, as well as the working environment of system maintenance and staff. 4 Requirements
4.1 Composition of the computer site
The following rooms can be selected according to the scale, purpose, task, nature of the computer system, the different requirements of the computer for power supply, air conditioning, etc. and the differences in the management system.
Note: It is allowed to use one room for multiple purposes or increase or decrease as appropriate. Main work room: computer room.
Basic work room: data entry room, terminal room, network equipment room, recorded media storage room, computer preparation room. First-class auxiliary rooms: spare parts room, unrecorded media storage room, data room, instrument room, hardware staff office, software staff office.
Second-class auxiliary rooms: maintenance room, power supply room, battery room, generator room, air conditioning system room, fire extinguisher cylinder room, monitoring room, duty room.
Third-class auxiliary rooms: storage room, dressing and shoe changing room, buffer room, computer room staff lounge, dishwashing room, etc. 4.2 Area of ​​computer site
4.2.1 The usable area of ​​computer room is generally determined by one of the following two methods. The first method is:
S = (5 ~7)ZSb
Where: S—the area of ​​computer room, m; S—refers to the area of ​​equipment related to computer system and occupying a position in the layout plan of computer room, m\; ZSs-refers to the sum of the floor area occupied by all equipment in computer room, m2. The second method is:
Where: S—the area of ​​computer room, m\; A—the total number of all equipment (racks) in computer room; k—coefficient, generally taken as (4.5~5.5)m2/rack). 4.2.2 The minimum usable area of ​​computer room shall not be less than 30m2. 4.2.3 The usable area of ​​the debugging room for research and production shall refer to 4.2.1. 4.2.4 The usable area of ​​other rooms shall be determined according to personnel, equipment and needs (1)
(2)
4.3 Environmental conditions in computer rooms
4.3.1 Temperature and humidity
GB/T 2887--2000
4.3.1.1 The temperature and humidity must meet the requirements of computer equipment. 4.3.1.2 According to the temperature and humidity requirements of the computer system, the temperature and humidity can be divided into two levels, A and B (see Table 1 and Table 2). The computer room can be implemented according to a certain level or a combination of certain levels. Note: Comprehensive implementation means that a computer room can be implemented according to certain levels, and it is not necessary to force them to be the same. For example, according to the requirements of the machine, a computer room can choose to: use A-level temperature and humidity when starting up, and use B-level temperature and humidity when shutting down.
4.3.1.3 The temperature and humidity requirements of the computer room shall be specified separately according to when starting up and when shutting down. The temperature and humidity of the room when starting up the machine are shown in Table 1. The temperature and humidity of the room when shutting down the machine are shown in Table 2. Table 1 Temperature and humidity requirements for the room when starting up the machine
Temperature, ℃
Relative humidity, %
Temperature change rate, ℃/h
Temperature, ℃
Relative humidity, %
Temperature change rate, ℃/h
No condensation
Temperature and humidity requirements for the room when shutting down the machine
No condensation
No condensation
No condensation
4.3.1.4 The temperature and humidity of other rooms can be determined according to the technical requirements of the installed equipment, or the levels in Tables 1 and 2 can be adopted. 4.3.2 Dust
The dust in the computer room depends on the machine requirements. The number of dust particles with a diameter greater than or equal to 0.5um in the main room should be less than or equal to 18,000 particles/cm (equivalent to 500,000 particles/foot). 4.3.3 Lighting
4.3.3.1 The illumination of the computer room at 0.8m above the ground should not be less than 3001x, and the illumination of the basic workroom and the first-class auxiliary room should not be less than 2001x. Other rooms should refer to GB50034 for implementation. 4.3.3.2 Emergency lighting
The computer room, terminal room, and recorded media storage room should be equipped with emergency lighting, and its illumination should not be less than 51x at 0.8m above the ground. The main passages and related rooms should be equipped with emergency lighting as needed, and its illumination should not be less than 11x at 0.8m above the ground. 4.3.4 Noise
When the computer system is shut down, the noise in the room should be less than 65dB(A) when tested at the center of the main computer room. 4.3.5 Electromagnetic field interference
4.3.5.1 Radio interference environmental field strength
The radio interference field strength in the computer room shall not exceed 126dB in the frequency range of 0.15MHz~1000MHz. 4.3.5.2 Magnetic field interference field strength
The magnetic field interference field strength in the computer room shall not exceed 800A/m (equivalent to 10Oe). 178
4.4 Grounding
4.4.1 Computer sites generally have the following types of ground: a) DC ground for computer systems;
b) AC working ground for computer systems;
c) AC working ground for other power systems; d) Safety protection ground;
e) Lightning protection ground.
4.4.2 Grounding resistance and mutual relationship
GB/T 2887--2000
4.4.2.1 The DC grounding resistance of the computer system should be determined according to the requirements of different computer systems. 4.4.2.2 The grounding resistance of the AC working ground should not be greater than 42. 4.4.2.3 The grounding resistance of the safety protection ground should not be greater than 40. 4.4.2.4 The grounding resistance of the lightning protection ground should not be greater than 100. 4.4.2.5 The relationship and connection method between the various grounds should be determined according to the requirements of different computer systems. 4.5 Power supply
The power supply of the computer site should meet the following requirements: 4.5.1 Frequency: 50Hz;
Voltage: 380V/220V;
Number of phases: three-phase five-wire or three-phase four-wire/single-phase three-wire. 4.5.2 The power supply parameters are subject to the allowable range of variation of the computer performance, see Table 3. Table 3 Power supply parameters
Steady-state voltage deviation example, %
Steady-state frequency deviation range, Hz
Voltage waveform distortion rate, %
Permitted power outage duration, ms
4.6 Power supply
-5～+5
-0. 2～+0. 2
According to the use of computers, the power supply methods can be divided into three categories: a) Class I power supply: an uninterrupted power supply system needs to be established; b) Class II power supply: a backup power supply system needs to be established; c) Class III power supply: considered as general user power supply. 4.7 Building structure
-10～+10
- 0. 5～+0. 5
4～200
4.7.1 The net height of the computer room depends on the size of the room, generally 2.5m～3.2m. 4.7.2 The floor load of the computer room depends on the equipment and is generally divided into two levels: Class A: ≥500 kg/m2;
Class B: ≥300 kg/m2.
-15～+10
200~1500
4.7.3 The floor load of the air-conditioning equipment and power supply equipment room should be determined according to the weight of the equipment, and should generally be greater than or equal to 1000kg/m2 or reinforcement measures should be taken.
4.7.4 The fire resistance level of the building structure such as the computer room and the recorded media storage room should comply with the provisions of GB/T9361. 4.7.5 It is recommended to use raised floors in computer rooms. The specifications and performance of raised floors should comply with the provisions of SJ/T10796-1996. 4.8 Use and storage of media
4.8.1 The use conditions of media should comply with the provisions of 4.3.1.3. 179
For media storage conditions, see Table 4.
Temperature, ℃
Relative humidity, %
Magnetic field strength, A/m
Paper media
4.9 Technical safety requirements for computer rooms
GB/T2887—2000
Table 4 Media storage conditions
20～50
Recorded
Unrecorded
20～80
4.9.1 The technical safety requirements for computer rooms shall comply with the provisions of GB/T9361. 4000
Recorded
Unrecorded
4.9.2 Computer rooms should be equipped with monitoring and protection equipment as appropriate, depending on the performance and purpose of the computer system: a) Infrared sensor;
b) Automatic fire alarm;
c) Temperature and humidity sensor;
d) Surveillance camera, etc.;
e) Water leakage sensor;
f Door alarm system;
g) Others.
5 Test method
5.1 Composition inspection
Use visual inspection, and the number of rooms determined by scale, purpose, etc. should meet the requirements of 4.1. 5.2 Area test
a) Tape measure;
b) Others.
5.3 Temperature test
5.3.1 Test equipment
a) Mercury thermometer;
b) Bimetallic thermometer;
c) Electronic thermometer;
d) Others.
5.3.2 Test method
a) The test at startup should be carried out after the computer equipment has been running normally for 1 hour; b) The height of the measurement point should be 0.8m above the ground and 0.8m away from the equipment, and should avoid the air outlet and return outlet; c) The distribution of measurement points is shown in Figure 1;
d) The test method for temperature during shutdown is the same as a) to c). 5.3.3 Test data
The data of each measurement point is the actual measured temperature of the room, and each point should meet the requirements of Table 1 and Table 2. 5.4 Humidity test
GB/T 2887--2000
Note: The measuring points 2, 3, 4, and 5 should be selected near the center of A~1, B~1, C~1, and D~1. Figure 1 Distribution of measuring points
5.4.1 Test equipment
a) Ordinary dry-bulb and wet-bulb thermometer;
b) Ventilated dry-bulb and wet-bulb thermometer (ventilated wet table); c) Resistance hygrometer;
d) Automatic hair hygrometer;
e) Electronic hygrometer;
f) Others.
5.4.2 Test method
Test according to the instructions of the selected instrument. 5.4.3 Test data
The test data should meet the requirements of 4.3.1.3. 5.5 Dust test
5.5.1 Test equipment
a) Dust particle counter;
b) Others.
5.5.2 Test method
a) The room and air-conditioning system should be thoroughly cleaned for the completion test of the computer site, and the test should be carried out after the air-conditioning system has been operating normally for 24 hours;
b) For counting dust particles with a particle size greater than or equal to 0.5um, the light scattering particle counting method should be used; c) Sampling precautions: The sampling tube must be clean and leakage is strictly prohibited at the connection; the length of the tube should be based on the allowable length of the instrument, and should not be greater than 1.5m when there is no regulation; the tester should be on the downwind side of the sampling port; d) Measurement point layout: 5 measurement points are arranged according to 50m2, as shown in Figure 1. For every additional 20m2 to 50m2, 3 to 5 measurement points are added. 5.5.3 Test data
Each measuring point is tested three times in a row, and the average value is taken as the actual measured value of the point. The actual measured values ​​of each measuring point represent the amount of dust in the room.
5.6 Illuminance test
5.6.1 Test equipment
a) Illuminance meter;
b) Others.
5.6.2 Test method
a) Test on an assumed work surface in the room that is 1m away from the wall (0.5m for a small area room) and 0.8m from the ground; or test on an actual work surface;
GB/T 2887--2000
b) Select 3 to 5 test points. For a large area room, more points can be selected for testing. 5.6.3 Test data
The data of each measuring point is the actual illumination of the room, which should meet the requirements of 4.3.3. 5.7 Noise test
5.7.1 Test equipment
Ordinary sound level meter.
5.7.2 Test method
Measurement is carried out at the center of the main computer room when the electronic computer system is shut down. 5.7.3 Test data
The measured stable value is the noise value of the room and should meet the requirements of 4.3.4. 5.8 Test of electromagnetic field and environmental field strength
5.8.1 Test of radio interference environmental field strength5.8.1.1 Test equipment
a) Interference field strength measuring instrument;
b) Others. Www.bzxZ.net
5.8.1.2 Test method
Test at any point in the computer room, and the maximum value should meet the requirements of 4.3.5.1. 5.8.2 Test of magnetic field interference environmental field strength
5.8.2.1 Test equipment
a) AC and DC gaussmeter;
b) Others.
5.8.2.2 Test method
Test at any point in the computer room, and the maximum value shall meet the requirements of 4.3.5.2. 5.9 Ground resistance test
5.9.1 Test equipment
a) Ground resistance measuring instrument;
b) Others.
5.9.2 Test method
Test according to the requirements of the selected instrument.
5.9.3 Test data
The test data shall meet the requirements of 4.4.
5.10 Voltage and frequency test
5.10.1 Test equipment
a) Pointer multimeter or digital multimeter; b) Electric frequency meter or variable frequency meter, c) Universal interference tester;
d) Others.
5.10.2 Test method
Measure the voltage and frequency at the output end of the computer-specific power distribution cabinet (panel). 5.10.3 Test data
The test data shall meet the requirements of 4.5.
5.11 Test of waveform distortion rate
5.11.1 Test equipment
#) Ordinary oscilloscope;
b) Waveform distortion meter;
c) Others.
5.11.2 Test method
GB/T 2887--2000
a) The test instrument is used to observe the waveform. At some important places, the oscilloscope is fixedly connected to the line and the waveform changes at that place are observed. b) The shell of the test instrument and the voltage to be measured should have a common grounding point to prevent the introduction of interference. 5.11.3 Test data
The test data shall meet the requirements of 4.5.
6 Acceptance rules
6.1 General provisions
The computer site should be accepted before the user accepts it. The acceptance should be carried out jointly by the user and the construction department, or by a nationally recognized quality inspection unit (which can be entrusted by the user or the construction unit). 6.2 Acceptance items
The acceptance items of the computer site should be jointly determined by the user and the construction unit in accordance with the provisions of Chapter 4, and the relevant items should be tested in accordance with the provisions of Chapter 5.
6.3 Acceptance result processing
An acceptance report should be submitted after acceptance.
If a certain item fails to pass the acceptance during the acceptance process, the reason should be found out, and the acceptance of the item should be carried out again after the correction. If it fails to pass the acceptance again, it is judged that it has not passed the acceptance.
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