【英文标准名称】:Distributionautomationusingdistributionlinecarriersystems-Datacommunicationprotocols-Applicationprotocols-Distributionlinemessagespecification
【原文标准名称】:配电线路载波系统配电自动化.数据通信协议.应用协议.配线信号规范
【标准号】:BSEN61334-4-41-1998
【标准状态】:现行
【国别】:英国
【发布日期】:1998-04-15
【实施或试行日期】:1998-04-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:数据传输;应用层(开放系统互连);电力系统;数据传送;自动控制系统;协议;输电网;通信规程;文电;配电;电力传输线路;电力传输;电网;控制系统
【英文主题词】:
【摘要】:Thisstandardcoversawiderangeoftelecommunicationprocesses,brieflywithapplicationexamplesofcontrolandmonitoringofthenetwork.
【中国标准分类号】:F21
【国际标准分类号】:33_040_60;35_100_70
【页数】:128P;A4
【正文语种】:英语


Product Code:SAE J1661
Title:Procedure Retrofitting CFC-12 (R-12) Mobile Air-Conditioning Systems to HFC-134a (R-134a)
Issuing Committee:Interior Climate Control Committee
Scope:The purpose of this SAE Recommended Practice is to provide a service procedure for retrofitting a CFC-12 (R-12) system to HFC-134a (R-134a) while preserving performance and integrity of the air-conditioning (A/C) system. The steps outlined in this procedure are complete when combined with good service practices and the vehicle manufacturer's recommendations (if available) for retrofitting their models.Separate service equipment, for CFC-12 (R-12) and HFC-134a (R-134a), including refrigerant recovery/recycle (R/R), service manifolds, vacuum pumps, and charging equipment shall be used to preserve the purity of the refrigerants and the mobile A/C systems. This procedure will minimize release of refrigerant to the atmosphere, and will preserve the integrity of the recycled CFC-12 (R-12) and HFC-134a (R-134a) supplies.This document applies to A/C systems used to cool the passenger compartment of automobiles, light trucks, and other vehicles with similar CFC-12 (R-12) systems. Due to technical advancements in recent years, this procedure is recommended for common vehicle platforms produced in the mid-1980s and later. Vehicles produced before this time period may require additional retrofit requirements. A/C systems used on mobile vehicles for refrigerated cargo that have hermetically sealed systems are not covered by this document.This document is only complete when combined with the requirements of SAE J1657 "Selection Criteria for Retrofit Refrigerants to Replace CFC-12 (R-12) in Mobile Air-conditioning Systems."