This standard specifies the scope, test methods, inspection rules, marking, packaging, transportation and storage of IC card household diaphragm gas meters with a maximum flow rate of 10m3/h or less. This standard applies to the design, production, testing and acceptance of IC card household diaphragm gas meters. CJ/T 112-2000 IC card household diaphragm gas meters CJ/T112-2000 Standard download decompression password: www.bzxz.net

Engineering Construction Standard Full Text Information System
People's Republic of China Urban Construction Industry Standard CJ/T112——2000
IC Card Family Diaphragm Gas Meter
Integrated Circuit Card Family Diaphragm Gas Meter Construction Standard
2000-05-10 Issued
2000-10-01 Implementation
Ministry of Construction of the People's Republic of China
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
CJ/T112—2000
This standard is specially prepared to strengthen the quality management and unify the standards of IC Card Family Diaphragm Gas Meter, improve the management level of the gas industry, and promote the modernization of the gas charging system.
IC Card Family Diaphragm Gas Meter is a component of the IC Card Gas Charging System, so this standard is only one of the standards in the series of gas charging system standards. This standard is based on GB/T6968-1997 "Diaphragm Gas Meter", and adds relevant technical requirements for prepaid controllers, and follows the standard requirements for relevant electronic products. The contact IC card used in IC card household diaphragm gas meters should comply with ISO7816-1~7816-4 "Identification Card-Contact Integrated Circuit Card" and national standards for relevant IC cards.
This standard is proposed by the Standard and Quota Research Institute of the Ministry of Construction. This standard is under the jurisdiction of the China Municipal Engineering North China Design Institute, the technical unit responsible for urban gas standards of the Ministry of Construction.
The main drafting units of this standard are: Gas Appliance Safety Certification Affairs Center of the Ministry of Construction, Dandong Sky Electronic Development Co., Ltd., Tianjin Xinjusheng Electronic Industry Co., Ltd., Zhengzhou Anran Measurement and Control Equipment Co., Ltd., Hangzhou Pioneer Electronic Technology Co., Ltd., Jining Lanwei Intelligent Network Center, Dandong Thermal Instrument Co., Ltd., Chongqing Gas Co., Ltd., and Kunming Gas Corporation.
The main drafters of this standard are Wang Yunlong, Wang Wenge, Wang Yanbo, Cui Weiyang, Yang Songmaoqiang, Cui Yanqing, Ren Shukai, Gong Dongping and Chen Huashan. Engineering Construction Standard Full-text Information System
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Engineering Construction Standard Full-text Information System
Urban Construction Industry Standard of the People's Republic of China IC Card Household Diaphragm Gas Meter
CJ/T112—2000
Integrated circuit card family diaphragm gas meter1Scope
This standard specifies the scope requirements, test methods, inspection rules, marking packaging, transportation and storage of IC card household diaphragm gas meters with a maximum flow rate of 10m/h (including 10m/h) or less.
This standard applies to the design, production, testing and acceptance of IC card household diaphragm gas meters.
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 the parties using this standard should explore the possibility of using the latest versions of the following standards. 7Batch inspection counting sampling procedures and sampling tables (applicable to GB/T2828-1987
continuous batch inspection)
GB/T2829-1987
periodic inspection counting sampling procedures and sampling tables (applicable to the inspection of production process stability)
: Shell protection level (P code)
GB4208--1993
GB/T6833.5-1987 Electronic measuring instrument electromagnetic compatibility test specification radiation sensitivity test
2000-05-10 Ministry of Construction of the People's Republic of China approved the full text information system of engineering construction standards
2000-10-01 implementation
engineering Construction Standard Full Text Information System
GB/T6968—1997
GB/T14437—1997
GB/T16411—1996
Diaphragm Gas Meter
Product Quality Supervision Counting Single Sampling Inspection Procedure and Sampling Plan
General Test Method for Household Gas Appliances
CJ/T3074—1998
Electronic Controller for Household Gas Burning Appliances
8Gas Burning Appliance Laboratory—Test Equipment and InstrumentsCJ/T3075.2—1998
3 Definition
3.1IC Card Household Diaphragm Gas Meter (Referred to as Gas Meter) gas meter
ICcardfamilydia
A gas metering device with prepayment function, which is composed of a diaphragm gas meter as the basic meter, an IC card as the medium, and an electronic controller. 2 Basic meter basicgasmeters
The diaphragm gas meter used by IC card household diaphragm gas meters. 3.3 Controller controlunit
A device used for gas metering, display and control. Undervoltage value minimumoperatingvoltage. 3.4
The minimum set voltage value to ensure the normal operation of the electronic controller. 3.5
Total pressure loss totalpressureloss
The pressure loss between the air inlet and the air outlet under specified conditions after the gas meter is installed with a control valve.
4 General requirements
4.1 Model compilation
4.1.1 Model compilation
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4.1.2 Model compilation example
Base meter model
Card type
-C Memory card
L Logic encryption card
ZCPU smart card
IC card household diaphragm gas meter
Indicates: Use the base meter shown in the box, equipped with a CPU smart card type IC card household diaphragm gas meter.
The gas meter flow range is shown in Table 1.
Table 1 Maximum flow value and minimum flow upper limit value Maximum flow Q
Material requirements
Minimum flow upper limit value Qm
Gas meter inlet and outlet joints should be made of metal materials. Card seat structure requirements
The structure of the card seat should meet the requirements of IP31 in GB4208-1993. Technical requirements
The technical requirements of the gas meter should meet the requirements of Table 2. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Sealing
Total Pressure Loss
Basic Error
Maximum Allowable Error
Prompt Function
Control Function
Protection Function
Electrical Performance
Error Curve
Technical Requirements for Gas Meters
Technical Requirements
No Leakage
≤250Pa
Meet the Requirements
Meets the requirements
Standard deviation of test components
Durability
Working power supply undervoltage
Insufficient remaining gas volume
Misoperation
Gas prepayment and gas usage control
Data retention and recovery
Gas volume accumulation
Power supply undervoltage protection
Magnetic protection
Protective seal
Insensitivity to radiated electromagnetic fields
Electrical strength
Surge voltage resistance|| tt||Power supply transient sensitivity
Valve durability
Card seat durability
Reliability (MITBF) lower limit
External connection line tensile strength
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Meet the requirements
AC power supply battery power supply
Test method
Controller of the controller
Sealing, basic error,
Pressure loss meet the requirements
Clear prompt
Clear prompt
Clear prompt
Accurate
Accurate
Accurate
Accurate
Normal operation or shutdown
Obvious and effective
No impact on performance
No breakdown or flashover
Normal operation or
Safe interruption
No breakdown or flashover
≥10.000 times, leakage
volume<0.55L/h
≥10.000 times, normal
>2 000 h
>30N, no falling off or deformation
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Steady-state damp heat
Vibration test
(sinusoidal)
Test method
Temperature, relative humidity
Displacement amplitude
Working direction
Test conditions and inspection equipment
Table 2 (end)
Technical requirements
AC power supply Battery power supply
Test method
Controller Controller
Does not affect the performance
Does not affect the performance
Does not affect the performance
Does not affect the performance
Does not affect the performance
Does not affect the performance
Does not affect the performance
Does not affect the performance
Does not affect the performance
Does not affect the performance
The test conditions and inspection equipment shall comply with the provisions of A1 in Appendix A of GB/T6968-1997.
6.2 Sealing test
The sealing test is carried out in accordance with the provisions of Appendix A2.2.6 of GB/T6968-1997 when the valve is open.
6.3 Total pressure loss test
The total pressure loss value is obtained by measuring the pressure difference between the inlet and outlet of the measured meter with an inclined tube micromanometer under the condition of air density of 1.2kg/m and flow rate of Qm, and calculated according to formula (1).
APi+AP2
Where: △P—average value of total pressure loss, Pa; APi-
-maximum value of pressure difference fluctuation, Pa;
-minimum value of pressure difference fluctuation, Pa.
The total pressure loss shall meet the requirements of Table 2.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
6.4 Maximum Permissible Error Test
The maximum permissible error test shall be carried out in accordance with the provisions of Appendix A2.2.1 and A2.2.2 of GB/T6968-1997.
6.5 Durability Test
The durability test shall be carried out in accordance with the provisions of Appendix A2.4 of GB/T6968-1997. The operation mode is as follows:bzxZ.net
Each time, input the volume corresponding to 20h, that is, 20h×the maximum flow rate of the meter under test, and the cumulative operation time: 1000h for Class A meters and 2000h for Class B meters. 6.6 Control Part Test
6.6.1 Prompt Function Test
6.6.1.1 Working Power Supply Undervoltage Test
Test according to the method in 6.6.2.4.
6.6.1.2 Insufficient gas volume test
Perform the test in accordance with the method in 6.6.2.1.
6.6.1.3 Misoperation test
After inserting a card other than this meter or misoperation, the gas meter should have corresponding prompts when visually inspected. 6.6.2 Control function test
6.6.2.1 Gas prepayment and gas use control
a) Test block diagram
Constant pressure air source 1kPa)
b) Test requirements
IC card gas meter
Connect to the atmosphere
Connect according to the test block diagram of Figure 1, and input a certain amount of gas into the gas meter to make it work normally. When the gas volume is reduced to the set remaining gas volume value, the gas meter should give a prompt; when the gas volume drops to zero, the gas meter should be able to automatically cut off the gas source. After re-inputting the gas volume, the gas meter should automatically resume gas supply.
6.6.2.2 Data retention and recovery function test Connect according to the test block diagram of Figure 1, and input a certain amount of gas into the gas meter to make it work normally. At this time, record the remaining gas volume in the meter, and then cut off the power supply of the gas meter. The gas meter valve should be able to close automatically after 10 minutes. After the power supply is restored, the gas meter should be able to work normally. At this time, the remaining gas volume in the meter should be consistent with the data before the power outage. 6.6.2.3 Gas volume accumulation test
a) Input a gas volume higher than the preset remaining gas volume value into the gas meter to make it work normally, and read the remaining gas volume in the meter as Q1; b) Then input the gas volume Q2 into the gas meter;
c) Read the existing gas volume in the meter as Q, which should be Q=Qi+Q2. 6.6.2.4 Power supply undervoltage protection test
a) Test block diagram
IC card gas device
b) Test instrument requirements
Voltmeter: range 15V, accuracy level 1.0; regulated power supply: voltage 012V continuously adjustable, output current 1A. c) Test requirements
Connect the gas meter to be tested according to the test block diagram, adjust the DC regulated power supply to the normal working voltage of the gas meter, close the switch to make the gas meter work normally, and then slowly reduce the voltage of the DC 7
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Regulated power supply to the product design undervoltage value. At this time, the gas meter can give a prompt and shut down the gas source within the set time.
6.6.3 Protection function test
6.6.3.1 Magnetic protection function test
Connect the gas meter to be tested according to Figure 1, input a certain amount of gas into the gas meter to make it work normally. When a 400-500mT magnet is placed close to any part of the gas meter, the gas meter should automatically close the valve or use normal accurate measurement. 6.6.3.2 Protection seal test
Use visual inspection to check whether the gas meter has a protective seal or other measures that cannot be removed without destruction.
6.6.4 Electrical performance test
6.6.4.1 The test of insensitivity to radiated electromagnetic field shall be carried out in accordance with the test method of GB/T6833.5. 6.6.4.2 Electrical strength test
The electrical strength test shall be carried out in accordance with the method of 6.6.1 in CJ/T3074-1998. 6.6.4.3 Impulse voltage test
The impulse voltage test shall be carried out in accordance with the method of 6.6.2 in CJ/T3074-1998. 6.6.4.4 Power supply transient sensitivity test
The power supply transient sensitivity test shall be carried out in accordance with the method of 6.6.3 in CJ/T3074-1998.
Valve durability test
During the test, the valve switching action shall make the rate of the solenoid valve less than 20 times/min; the rate of the electric valve shall be 5 to 12 times/min. After controlling the valve to open and close for 10,000 times, the valve is in the closed state. A pressure of 4.2 kPa is applied to the valve inlet. The leakage at the valve outlet should be less than 0.55 L/h. The leak detector adopts the standard volumetric leak detector in Figure c5 of Appendix c of CJ/T3075.2-1998.
6.6.6 Durability test of the card socket
During the test, the insertion and removal rate of the card is less than 20 times/min. When a manipulator is used for insertion and removal, the insertion and removal force is 1.3 to 1.5 times its friction resistance. After repeated insertion and removal for 10,000 times, the socket 8
Engineering Construction Standard Full-text Information System
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Engineering Construction Standard Full-text Information System
should be able to be used normally.
6.6.7 Reliability test
The reliability test is carried out according to the method in Appendix B of C/T3074-1998, and the card is inserted and removed once every 8 hours.
6.6.8 External connection line tensile test
The external valve connection line is pulled outward and pushed inward with a force of 30N for 15 seconds each at 20mm outside the connection point. Check that there is no falling off and deformation between the connection line and the connection part. 6.7 Environmental condition resistance test
6.7.1 Low temperature test
The temperature is -10℃±2℃. Stabilize for 2 hours, let the gas meter operate normally for 1 hour, take it out and restore it at room temperature for 2 hours, and re-check the gas meter's sealing and maximum allowable error. It should meet the requirements of 6.2 and 6.4.
6.7.2 High temperature test
The temperature is +40℃±2℃. After stabilization for 2 hours and normal operation of the gas meter for 1 hour, take it out and restore it at room temperature for 2 hours. The gas meter should meet the requirements of 6.2 and 6.4 when re-inspected. 6.7.3 Constant humidity test
Temperature +40℃±2℃, relative humidity 93%±3%, duration 48 hours, take it out and restore it at room temperature for 2 hours. The gas meter should meet the requirements of 6.6.2.1 and 6.6.2.2 when re-inspected. 6.7.4 Salt spray test
Test and evaluate according to 15.2 of GB/T16411-1996. With the inlet and outlet of the gas meter closed, after a test cycle of 24 hours, all connectors should have good contact and meet the requirements of 6.6.2.1 and 6.6.2.2. 6.7.5 Vibration test
Frequency range 10Hz; offset amplitude 0.75min. After the product is vibrated in the working position on three mutually perpendicular axes for 10min each, the gas meter shall meet the requirements of 6.2, 6.4, 6.6.2.1 and 6.6.2.2 after re-inspection under packaging conditions. 7 Inspection rules
7.1 Factory inspection
Engineering construction standard full text information system
Engineering construction standard full text information system
7.1.1 Gas meters shall be inspected item by item according to the items listed in Table 3 when leaving the factory, and tested according to the corresponding test methods in Chapter 6.
7.1.2 Gas meters must be inspected and qualified by the quality inspection department of the manufacturer according to the items listed in Table 3, and can only leave the factory with a product certificate. 7.1.3 For gas meters delivered and accepted in batches, the sampling method shall be agreed upon by the supply and demand parties in accordance with the GB/T2828 product sampling plan and qualified level. The inspection requirements and defect classification of each item shall be in accordance with the provisions of Table 3.
7.1.4 Supervision inspection shall be carried out by sampling inspection in accordance with the provisions of GB/T14437. 7.2 Type inspection
Type inspection of gas meters shall be carried out in accordance with the provisions of 10.2.1 of GB/T6968-1997.
Type test sampling method shall be carried out in accordance with the provisions of GB/T2829, but shall not be less than three inspection items. Tests shall be carried out in accordance with the items listed in Table 3, and the test methods shall be carried out in accordance with the corresponding provisions of Chapter 6.
7.2.4 Type inspection shall provide the following information: a) Product technology and operating instructions;
b) Product production and inspection standards;
c) Product inspection methods and inspection procedures;
d) Photos or relevant technical drawings.
Performance test table
Project name
Sealing
Total pressure loss
Maximum allowable error
Durability
Engineering construction standard full text information system
Defect classification
Factory inspection Supervision inspection Type inspection
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