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

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CJ/T 112-2008: Integrated circuit card diaphragm gas meter
CJ/T 112-2008
CJ
URBAN CONSTRUCTION STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 91.140.99
P 47
Replacing CJ/T 112-2000
Integrated circuit card diaphragm gas meter
IC卡膜式燃气表
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...