JJG 162-2009 Translated English of Chinese Standard. JJG162-2009: Cold water meterhttps://www.chinesestandard.net, 2020. okt. 16. - 130 oldal This regulation is applicable to the type evaluation, first verification, subsequent verification and in-use inspection of cold water meters. The cold water meter referred to in this regulation is a water meter that measures clean cold water flowing through a closed pipe and has a temperature of T30 or T50, including mechanical water meters, mechanical water meters equipped with electronic devices, water meters based on electromagnetic or electronic principles. |
Gyakori szavak és kifejezések
accuracy level ancillary device applicable battery Clause of Technical combination meter cubic meters device under test display downstream Electromagnetic compatibility Electromagnetic environment electronic devices electrostatic discharge environment test Environmental class equipment under test error curve exceed the maximum flow point frequency high zone Q2 indicating device indication error obtained indication value influence quantity installed intrinsic error low zone Q1 magnetic field maximum admissible pressure maximum permissible error measure the indication measurement sensor measuring instruments mechanical water meters meet the requirements meters with electronic minimum flowrate nominal parameters parity bits permanent flowrate Q3 pressure loss product standard prototype Qualification criteria range rated working conditions reference conditions relative indication error Remarks regulation requirements of 5.2 reverse flow signal straight pipe section Table A.5 Technical requirements test conditions test device test equipment test EUT Test methods Test purpose Check type approval type evaluation upstream water flow water meters equipped water temperature