SAE ARP731 General Requirements for Application of Vapor Cycle Refrigeration Systems for Aircraft

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Product Code:SAE ARP731
Title:General Requirements for Application of Vapor Cycle Refrigeration Systems for Aircraft
Issuing Committee:Ac-9 Aircraft Environmental Systems Committee
Scope:Recommendations of this ARP refer specifically to the application of closed cycle vapor cycle refrigeration systems as a source of cooling in an aircraft air conditioning system. General recommendations for an air conditioning system which may include a vapor cycle system as a cooling source are included in ARP85, Air Conditioning, Helicopters, General Requirements For, and AIR806, Air Conditioning Design Information for Cargo and High Density Passenger Transport Airplanes, and are not included herein.
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基本信息
标准名称:数字量输入输出通道模板 通用技术条件
中标分类: 仪器、仪表 >> 工业自动化仪表与控制装置 >> 工业控制与计算机应用装置
发布部门:重庆工业自动化仪表所
发布日期:1993-07-09
实施日期:1994-01-01
首发日期:1900-01-01
作废日期:1900-01-01
归口单位:重庆工业自动化仪表研究所
出版日期:1900-01-01
页数:8 页
批文号:机械科[1993]317号
适用范围

本标准规定了工业控制微型计算机系统中,数字量输入输出通道模板必须满足的基本技术条件。主要内容包括术语、基本参数、技术要求、试验方法和检验规则等。

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所属分类: 仪器 仪表 工业自动化仪表与控制装置 工业控制与计算机应用装置
【英文标准名称】:StandardTestMethodforCompressiveStrengthofSoil-CementUsingPortionsofBeamsBrokeninFlexure(ModifiedCubeMethod)
【原文标准名称】:用横梁弯曲断裂部分测定掺土水泥抗压强度的标准试验方法(改良立方体法)
【标准号】:ASTMD1634-2000(2006)
【标准状态】:现行
【国别】:
【发布日期】:2000
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D18.15
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:抗压强度;试验;施工材料
【英文主题词】:soil-cement;soilstabilization;unconfinedcompressivestrength
【摘要】:Thistestmethodisintendedforuseinthelaboratoryandasaresearchtoolfordeterminingrelativecompressivestrengthvaluesforvarioussoil-cementmixtures.ItisnotintendedasanalternativeforTestMethodD1633andthetestvaluesobtainedbythesetwotestmethodsarenotinterchangeableandnotnecessarilycomparable.AcomparisonofstrengthsobtainedbyTestMethodsD1633andD1634isgiveninFootnote4.3Note18212;Thequalityoftheresultproducedbythisstandardisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thistestmethodcoversthedeterminationofthecompressivestrengthofsoil-cement,usingfortestspecimensportionsofbeamsbrokeninflexureinaccordancewithTestMethodD1635.1.2UnitsThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionstoinch-poundunits,whichareprovidedforinformationonlyandarenotconsideredstandard.1.2.1Theconvertedinch-poundunitsusethegravitationalsystemofunits.Inthissystem,thepound(lbf)representsaunitofforce(weight),whiletheunitformassisslugs.Theconvertedslugunitisnotgiven,unlessdynamic(F=ma)calculationsareinvolved.Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q11
【国际标准分类号】:93_020
【页数】:3P.;A4
【正文语种】: