ASTM D 4787-1993 对混凝土底层使用的液体或薄板衬垫的连续验正

上一篇: ASTM D 5440-1993 测定脂肪和油熔点的试验方法
下一篇: ASTM D 5399-1993 气相色谱法测定烃类溶剂沸点分布的试验方法

Product Code:SAE J2470
Title:Hydraulic Fluid Power - Valves - Method for Assessing the Lock Sensitivity to Contaminants
Issuing Committee:Ship Fluid Systems Committee
Scope:This SAE Recommended Practice defines a procedure, which will aid in assessing the contaminant sensitivity of hydraulic valves. The approach taken defines a test procedure with flexibility for testing valves in a wide range of contamination levels. The user of this procedure must establish the contamination levels for testing. Three levels are suggested which should cover the range for most valve applications. This procedure does not establish the contaminant sensitivity requirements for any valve. The user of this procedure needs to be aware of the system contamination level that the valve will operate in and select test contamination levels significantly higher than the operating level to assess the suitability of the valve. The test procedure permits a valve to be tested without disassembly and therefore permits protection of proprietary design information.This procedure assesses the contamination sensitivity of valves by contaminant lock. The procedure indicates the sensitivity of valves by contaminant lock due to various sizes of contaminants. The test is designed to assess the contaminant sensitivity of valves in tests of relatively short duration. See Appendix A for guidance as to how the tests and their results may be used.The tests are purposely designed to be severe in order to be applicable to a wide range of contaminated environments. The use of valves in many applications and for various purposes results in differing levels of acceptable performance. That is, the same valve may be unacceptable - in relation to operation in a contaminated environment - in one application and be acceptable in another. The user must make that decision based on a review of the expected level of the specific application and the test results obtained.NOTE - See 7.2 if document is to be contractually invoked.【英文标准名称】:ElectromagneticcompatibilityandRadiospectrumMatters(ERM)-WirelessVideoLinks(WVL)operatinginthe1,3GHzto50GHzfrequencyband-Part1:Technicalcharacteristicsandmethodsofmeasurement(EndorsementoftheEnglishversionEN302064-1V1.
【原文标准名称】:电磁兼容性和无线电频谱情况(ERM).工作频率带在1.3GHz到50GHz的无线视频链路(WVL).第1部分:技术特性和测量方法
【标准号】:DINEN302064-1-2005
【标准状态】:现行
【国别】:德国
【发布日期】:2005-07
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:无线;信号传输;录像系统;远程通信;无线电发射机;电气工程;无线通信业务;测量技术;额定值;频带;兼容性;EMC;无线电系统;电磁兼容性;视频连接;参数
【英文主题词】:Bandoffrequencies;Compatibility;Electricalengineering;Electromagneticcompatibility;EMC;Measuringtechniques;Parameters;Radiosystems;Radiotransmitters;Ratings;Signaltransmission;Telecommunication;Telecommunications;Videolinks;Videorecordingsystems;Wireless;Wirelesscommunicationservices
【摘要】:ThisEuropeanstandardspecifiesrequirementsinthetelecommunicationssector.
【中国标准分类号】:L06
【国际标准分类号】:33_100_01
【页数】:2P.;A4
【正文语种】:德语