GB/T 25918-2010Portable calibration instrument for water meters (English PDF)

1 Scope

This standard specifies the terminology and definition of portable water meter calibrator (hereinafter referred to as water meter calibrator), general requirements, measurement requirements, technology

Requirements, test methods, test rules and signs, packaging, transportation and storage.

This standard applies to portable water meter calibrators with a maximum flow rate of less than 16 m3/h using standard table method.

2 normative reference documents

The terms of the following documents are hereby incorporated by reference into this standard. Whichever is the date of the reference file, which is followed by all (Excluding corrigenda) or revisions do not apply to this standard, however, encourage the parties to reach an agreement under this standard

Whether you can use the latest version of these files. For undated references, the latest edition applies to this standard.

GB/T 191 Packaging and Storage Icons (GB/T 191-2008, ISO 780..1997, MOD)

GB/T 321-2005 Number of priority and priority (ISO 3. 1973, IDT)

GB/T 778.1-2007 Measurement of water flow in closed pipelines Drinking cold water meters and hot water meters - Part 1. Specifications (ISO 4064-1..2005, IDT)

GB/T 778.3-2007 Measurement of water flow in closed pipelines Drinking cold water meters and hot water meters Part 3. Test methods

Law and test equipment (ISO 4064-3..2005, IDT)

GB/T 2423.2 Environmental testing for electric and electronic products - Part 2. Test methods - Test B. High temperature (GB/T 2423.2-

2001, IEC 60068-2-2. 1974, IDT)

GB/T 2423.4 Environmental testing for electric and electronic products - Part 2. Test methods - Test Db alternating hot and humid (12h 12h

Cycle) (GB/T 2423.4-2008, IEC 60068-2-30..2005, IDT)

GB/T 2423.7 Environmental testing for electric and electronic products - Part 2. Test methods - Tests Ec and guidance. Dumping and overturning (main

For equipment type samples) (GB/T 2423.7-1995, idtIEC 60068-2-31. 1982)

GB 4208-2008 enclosure protection class (IP code) (IEC 60529..2001, IDT)

General technical requirements for packaging of electromechanical products GB/T 13384-2008

GB/T 15479-1995 Industrial automation instrumentation Insulation resistance, dielectric strength Technical requirements and test methods

GB/T 17626.2 Electromagnetic compatibility test and measurement technology Electrostatic discharge immunity test (GB/T 17626.2-2006,

IEC 61000-4-2..2001, IDT)

GB/T 17626.3 Electromagnetic compatibility test and measurement technology Radio frequency electromagnetic radiation immunity test (GB/T 17626.3-

2006, IEC 61000-4-3..2002, IDT)

GB/T 17626.4 Electromagnetic compatibility test and measurement techniques Electrical fast transient burst immunity test (GB/T 17626.4-

2008, IEC 61000-4-4..2004, IDT)

OIMLD11..2004 General requirements for electronic measuring instruments

3 terms and definitions

GB/T 778.1-2007 and the following terms and definitions apply to this standard.