GB/T 778.3-2007
Measurement of water flow in fully charged closed conduits.Meters for cold potable water and got water.Part 3:Test methods and equipment (English Version)

Standard No.

GB/T 778.3-2007

Language

Chinese, Available in English version

Release Date

2007

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Status

Be replaced 2019-01

Replace By

GB/T 778.2-2018

GB/T 778.3-2018

Latest

GB/T 778.2-2018

GB/T 778.3-2018

Replace

GB/T 778.3-1996

Scope

This part of GB/T 778 specifies the test methods and test equipment for determining the main characteristics of water meters The water meter of 500 is O.6 MPa (6 bar), the maximum allowable working temperature (MAT) of the drinking cold water meter is 30 ℃, and the hot water meter can reach a maximum of 180 ℃ according to the level of various drinking cold water meters and hot water meters GB/T778 This standard also applies to water meters based on electrical or electronic principles and based on mechanical principles with electronic devices for measuring the actual volumetric flow of cold and hot water for drinking. For water meters with a common flow rate of less than 160 m/h, when doing durability tests or performance tests under various influence quantities, in order to adapt to the conditions of each test laboratory, the test program can make provisions for modifying the reference conditions Note: If national regulations are involved, the national regulations are higher than the provisions of this part of GB/T778

GB/T 778.3-2007 Referenced Document

• GB/T 17626.2-1998 Electromagnetic compatibility--Testing and measurement techniques--Electrostatic discharge immunity test
• GB/T 17626.4-1998 Electromagnetic compatibility--Testing and measurement techniques--Electrical fast transient/burst immunity test
• GB/T 1800.4 Limits and fits Tables of standard tolerance grades and limit deviations for holes and shafts
• GB/T 2421-1999 Environmental testing for electric and electronic products Part 1: General and guidance
• GB/T 2423.1-2001 Environmental testing for electric and electronic products Part 2: Test methods Tests A: Cold
• GB/T 2423.2-2001 Environmental testing for electric and electronic products Part 2: Test methods Tests B: Dry heat
• GB/T 2423.7-1995 Environmental testing for electric and electronic products. Test 2:Test methods. Test Ec and guidance:Drop and topple. Primarily for equipment-type specimens
• GB/T 2424.1-2005 Environmental testing for electric and electronic products Guidance for high temperature and low temperature tests
• GB/T 2424.2-2005 Environment tests for electric and electronic products.Guidance for damp heat tests
• 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
• GB/T 778.2-2007 Measurement of water flow in fully charged closed conduits.Meters for cold potable water and hot water.Part 2: Installation requirements
• IEC 60068-2-30:1980 Basic environmental testing procedures. Part 2 : Tests. Test Db and guidance: Damp heat, cyclic (12 + 12-hour cycle)

GB/T 778.3-2007 history

• 2018 GB/T 778.2-2018 Meters for cold potable water and hot water.Part 2:Test methods
• 2007 GB/T 778.3-2007 Measurement of water flow in fully charged closed conduits.Meters for cold potable water and got water.Part 3:Test methods and equipment
• 1996 GB/T 778.3-1996 Measurement of water flow in closed conduits--Meters for cold potable water--Part 3:Test method and equipment

GB/T 778.3-2007 Measurement of water flow in fully charged closed conduits.Meters for cold potable water and got water.Part 3:Test methods and equipment was changed to GB/T 778.2-2018 Meters for cold potable water and hot water.Part 2:Test methods.

GB/T 778.3-2007 -All Parts