CJ/T 224-2012: Electronic remote-reading water meter

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Scope

This standard stipulates the electronic remote-reading water-meter’s terms and definitions,
structure and classification, metrological requirements, technical requirements, test
method, inspection rules and mark, packaging, transportation, and storage.
This standard is applicable to water-meters that have digital output signal and comply with
relevant provisions of GB/T 778.1-2007 and GB/T 778.3-2007.
2  Normative references
The articles contained in the following documents have become part of this document
when they are quoted herein. For the dated documents so quoted, all the modifications
(including all corrections) or revisions made thereafter shall be applicable to this
document.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 778.1-2007 Measurement of water flow in fully charged closed conduits -
Meters for cold potable water and hot water - Part 1. Specifications (ISO 4064-1.2005,
IDT)
GB/T 778.3-2007 Measurement of water flow in fully charged closed conduits -
Meters for cold potable water and hot water - Part 3. Test methods and equipment (ISO
4064-3.2005 IDT)
GB/T 2423.8 Environmental testing for electric and electronic products Part 2. Test
methods Test Ed. Free fall (idt IEC 68-2-32.1990)
GB 4208-2008 Degrees of protection provided by enclosure (IP code) (IDT IEC
60529.2001)
GB/T 5080.7-1986 Equipment reliability testing - Compliance test plans for failure
rate and mean time between failures assuming constant failure rate (idt IEC
605-7-1978)
GB/T 15464 General-purpose specification for the packaging of instrumentation
products
GB/T 15479-1995 Technical requirements and test methods of insulation resistance
and insulating strength for use in industrial process measurement and control
instruments
JB/T 9329 Basic environmental conditions and testing methods for instruments
transportation and storage in the transportation
3  Terms and Definitions
For the purpose of this document, terms and definitions defined in GB/T 778.1 AND the
following terms and definitions apply.
3.1
Electronic remote-reading water-meter
The water-meter that has digital output signal; the function of water flow signal acquisition;
and functions such as data processing, storage, and remote transmission.
3.2
Mother meter
The velocity-type water-meter and volumetric water-meter that are used to measure
water.
3.3
Electronic device
A part of the electronic remote-reading water-meter. It adopts electronic components to
execute the specific functions such as water flow’s signal conversion, data processing and
information storage, and signal remote transmission. The electronic device can be made
to be independent; it can be tested independently.
3.4
Mechanical-electric conversion
The process that the mechanical counting signal of accumulative volume of the electronic
remote-reading water-meter is converted into electronic counting signal.
3.5
Mechanical-electric conversion device
The electronic components that perform mechanical-electric conversion.
3.6
6.1.1 Appearance
The electronic remote-reading water-meter shall have good finishing, no burr, scratch,
crack, corrosion, mildew stain and coating peeling.
The displayed digits shall be eye-catching, clean. The text symbols and marks indicating
the function shall be complete, clear and correct.
Protective glass on the reading device shall be in good transparency. There shall not have
defects such as making the reading distorted.
6.1.2 Electronic seal
Electronic seal of the electronic remote-reading water-meter shall comply with the
provisions of 6.5 in GB/T 778.1-2007.
6.1.3 Material and structure of the electronic remote-reading water-meter
Material and structure of the electronic remote-reading water-meter shall comply with the
provisions of 6.1 in GB/T 778.1-2007.
6.1.4 Adjustment of the electronic remote-reading water-meter
Adjustment of the electronic remote-reading water-meter shall comply with the provisions
of 6.3 in GB/T 778.1-2007.
6.1.5 Verification marks and protective devices
Verification marks and protective devices of the electronic remote-reading water-meter
shall comply with the provisions of 6.4 in GB/T 778.1-2007.
6.1.6 Inspection device
Inspection device of the electronic remote-reading water-meter shall comply with the
provisions of 6.7.2 in GB/T 778.1-2007.
6.1.7 Indication device
The indication device of electronic remote-reading water-meter shall comply with the
provisions of 6.6 and 6.7.3 in GB/T 778.1-2007.
6.2 Technical characteristics
6.2.1 Diameter and overall dimensions of the electronic remote-reading
water-meter
Diameter and overall dimensions of the electronic remote-reading water-meter shall
comply with the provisions of 4.1.1 in GB/T 778.1-2007.
Durability of the electronic remote-reading water-meter shall comply with the provisions of
6.2 in GB/T 778.1-2007.
6.11 Reliability of electronic devices
Under specified application conditions, MTBF of electronic device of the electronic
remote-reading water-meter shall not be less than 2.63X104h.
6.12 Enclosure protection
The electronic device of the electronic remote-reading water-meter, the leading-out wires
and the sealing device of leading-out wires shall reach the IP65’s protective level as
specified in GB 4208-2008. For the special application that requires to operate and
submerge in the water, the protective level shall reach IP68’s protective level.
7  Test methods
7.1 Test requirements
Requirements for general tests shall comply with provisions of Chapter 4, GB/T
778.3-2007. At the same time, it shall be equipped with the handheld unit, portable or
stationary meter reading system that are matched for data transmission of the electronic
remote-reading water-meter. Check the functions prior to test. It can only be put...

Basic Data

Standard ID	CJ/T 224-2012 (CJ/T224-2012)
Description (Translated English)	Electronic remote-reading water meter
Sector / Industry	Urban Construction Industry Standard (Recommended)
Classification of Chinese Standard	N10
Classification of International Standard	91.140.60
Word Count Estimation	23,255
Older Standard (superseded by this standard)	CJ/T 224-2006
Quoted Standard	GB/T 191; GB/T 778.1-2007; GB/T 778.3-2007; GB/T 2423.8; GB 4208-2008; GB/T 5080.7-1986; GB/T 15464; GB/T 15479-1995; JB/T 9329
Regulation (derived from)	Bulletin of the Ministry of Housing and Urban No. 1261
Issuing agency(ies)	Ministry of Housing and Urban-Rural Development of the People's Republic of China
Summary	This standard specifies the electronic remote meter terminology and definitions, structure and classification, measurement requirements, technical requirements, test methods, inspection rules, marking, packaging, transport and storage. This standard appli