Skip to product information
1 of 10

PayPal, credit cards. Download editable-PDF and invoice in 1 second!

CJ/T 112-2008 English PDF (CJT112-2008)

CJ/T 112-2008 English PDF (CJT112-2008)

Regular price $145.00 USD
Regular price Sale price $145.00 USD
Sale Sold out
Shipping calculated at checkout.
Quotation: In 1-minute, 24-hr self-service. Click here CJ/T 112-2008 to get it for Purchase Approval, Bank TT...

CJ/T 112-2008: Integrated circuit card diaphragm gas meter

This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of IC card diaphragm gas meters with a maximum flow of 160 cubic meter/h.
CJ/T 112-2008
CJ
URBAN CONSTRUCTION STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
ICS 91.140.99
P 47
Replacing CJ/T 112-2000
Integrated circuit card diaphragm gas meter
IC??????????????????
ISSUED ON. SEPTEMBER 22, 2008
IMPLEMENTED ON. FEBRUARY 01, 2009
Issued by. Ministry of Housing and Urban-Rural Development of PRC
Table of contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Model preparation ... 7
5 General requirements ... 7
6 Technical requirements ... 8
7 Test methods ... 13
8 Inspection rules ... 20
9 Marking, packaging, transportation and storage ... 23
Foreword
This standard shall, from the date of implementation, replace CJ/T 112-2000 ?€?Integrated circuit card diaphragm gas meter for household use?€?.
In the development process, this standard makes reference to EN 1359 ?€?Gas meter - Diaphragm gas meters?€?. This standard is the revision of CJ/T 112-2000 ?€?Integrated circuit card diaphragm gas meter for household use?€?. As compared with CJ/T 112-2000, the main changes are as follows.
- ADD the application scope of integrated circuit card diaphragm gas meter; INCREASE the maximum flow rate from 10 m3/h to 160 m3/h; CHANGE
the standard name into ?€?Integrated circuit card diaphragm gas meter?€?;
- CANCEL the memory card;
- CANCEL the IC card gas meter using AC power supply;
- ADD the service life requirements for built-in battery;
- ADD the appearance requirements for IC card gas meter;
- In the environmental requirements, ADD the requirements for IC card gas meter storage temperature;
- CHANGE the enclosure protection level from IP31 to IP53;
- ADD the electrostatic protection requirements;
- ADD the quiescent current and maximum operating current requirements; - ADD the conversion error requirements;
- ADD the security requirements.
This standard was proposed by the Ministry of Housing and Urban-Rural
Development Standard Quota Study Institute.
This standard shall be under the jurisdiction of the Ministry of Housing and Urban-Rural Development Urban Gas Standard Technical Unit - North China Municipal Engineering Design and Research Institute.
The main drafting organizations of this standard. Urban Construction Research Institute, Dandong Sikai Electronic Development Co., Ltd., Zhengzhou Anran I and C Equipment Co., Ltd., Hangzhou Pioneer Electronic Technology Co., Ltd., Shandong Jining Lanwei Intelligent Network Center, Dandong Thermal
Integrated circuit card diaphragm gas meter
1 Scope
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of IC card diaphragm gas meters with a maximum flow of 160 m3/h.
This standard is applicable to the design, production, testing and acceptance of IC card diaphragm gas meter (hereinafter referred to as gas meter).
2 Normative references
The provisions in following documents become the provisions of this Standard through reference in this Standard. For the dated references, the subsequent amendments (excluding corrections) or revisions do not apply to this Standard; however, parties who reach an agreement based on this Standard are
encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies. GB/T 2423.17 Environmental testing for electric and electronic products - Part 2. Test method - Test Ka. Salt mist (GB/T 2423.17-1993, eqv IEC
60068-2-11.1981)
GB/T 2828.1 Sampling procedures for inspection by attribute - Part 1.
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection (GB/T 2828.1-2003, ISO 2859-1.1999, IDT)
GB/T 2829 Sampling procedures and tables for periodic inspection by
attributes (Apply to inspection of process stability)
GB/T 4208-1993 Enclosure protection class (IP code) (eqv IEC 529.1989)
GB/T 6968 Diaphragm gas meters
GB/T 17626.2-2006 Electromagnetic compatibility (EMC) - Testing and
measurement techniques - Electrostatic discharge immunity test (GB/T
17626.2-2006, IEC 61000-4-2.1995, IDT)
GB/T 17626.3-2006 Electromagnetic compatibility (EMC) - Testing and
measurement techniques - Radiated radio frequency electromagnetic field immunity test (GB/T 17626.3-2006, IEC 61000-4-3.2002, IDT)
CJ/T 3074-1998 Electronic controller of household gas burning appliances CJ/T 3075.2-1998 Laboratory of gas burning appliances - Test equipment
and device
JJG 577 Verification regulation of diaphragm gas meter
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
IC card diaphragm gas meter
It refers to the gas meter which uses the diaphragm gas meter as the basic gas meter and the IC card as the media and is added with controller, having the function of gas pre-purchase.
3.2
Basic gas meter
It refers to the diaphragm gas meter used in the IC card diaphragm gas meter. 3.3
Control unit
It refers to the device used to read the basic gas meter data, display and control.
3.4
Minimum operating voltage
It refers to the minimum set voltage to ensure the normal operation of
controller.
3.5
Total pressure loss
It refers to, after the gas meter is installed with control valve, the pressure loss between the gas inlet and gas outlet under the specified conditions. 3.6
6.2.1.1 Storage temperature. -25 ??C ~ +55 ??C, after the restoration of normal temperature, its function shall comply with the requirements of 6.3 and 6.4. 6.2.1.2 Operating temperature. -10 ??C ~ +40 ??C, AND its function shall comply with the requirements of 6.3, 6.4, and 6.6.
6.2.2 Constant heat and humidity
When the relative humidity is 93% and temperature +40 ??C, its function shall comply with the requirements of 6.3 and 6.4, AND the appearance shall be free from rust.
6.2.3 Salt mist
Gas meter shall have salt mist resistant performance, AND its function shall comply with the requirements of 6.3 and 6.4.
6.2.4 Vibration
Gas meter shall have anti-vibration performance, the whole machine shall be free from loosening, AND its function shall comply with the requirements of 6.3 and 6.4.
6.3 Prompt function
Gas meter shall have one or more prompt functions of acoustic, light, and graphic display.
6.3.1 Under-voltage of operating power
When the gas meter?€?s operating voltage drops to the designed minimum
operating voltage of the product, there will be a clear prompt.
6.3.2 Residual gas volume insufficiency
When the gas meter?€?s residual gas volume drops to the predetermined value, there will be a clear prompt.
6.3.3 Misoperation
When using other cards than that of this meter OR when there is other
misoperations, there will be a clear prompt.
6.4 Control functions
6.4.1 Gas pre-purchase volume and gas use control.
6.5.3.2 Electrostatic protection
It shall comply with the level 2 requirements of GB/T 17626.2-2006; when the contact discharge is 4 kV, the gas meter shall automatically close the valve or operate normally, AND shall comply with the requirements of 6.3 and 6.4. 6.5.3.3 Insensitivity to radiated electromagnetic fields
It shall comply with the level 3 requirements of GB/T 17626.3. when the field strength is 10 V/m and the frequency is 80 MHz ~ 1000 MHz, the gas meter shall be automatically close the valve or operate normally, AND shall comply with the requirements of 6.3 and 6.4.
6.6 Electrical performance
6.6.1 Quiescent current
As for the gas meter using the built-in battery, the quiescent current shall be not less than 20 ??A.
6.6.2 Maximum operating current
The maximum operating current of the gas meter shall be less than 500 mA. 6.7 Valves
6.7.1 Sealability
When the valve is closed and the inlet pressure is 5 kPa, the allowable internal leakage of the valve shall not be more than 0.55 L/h.
6.7.2 Durability
After respectively opening and closing the valve for 5000 times, it shall operate normally AND the sealability shall comply with the requirements of 6.7.1. 6.8 Seat durability
After continuously 10000 times of card plugging, its performance shall comply with the requirements of 6.4.1.
6.9 Pulling resistance of external connection line
When the gas meter has external connection line, under the external force of 30 N, the connection line and the connection part shall not be separated or deformed.
6.10 Overall sealability
Power supply. voltage 0 V ~ 12 V continuously adjustable AND the output current is 1 A;
Voltmeter. the range is adapted to the voltage used by the tested gas
meter, AND the accuracy is level 1.
Micro-ammeter. range 50 ??A AND accuracy level 1;
Ammeter. range 1 A and accuracy level 1.
7.6.1 Quiescent current
In accordance with the test schematics 3, CONNECT the tested gas meter; MOVE the switch K to position 3; ADJUST the DC stabilized power supply to the voltage equivalent to the normal operating voltage of the gas meter; MOVE the switch K to position 2, to make the gas meter work normally; after the gas ...

View full details