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Product Code:SAE ARP958
Title:Electromagnetic Interference Measurement Antennas; Standard Calibration Method
Issuing Committee:Ae-4 Electromagnetic Environmental Effects (E3) Committee
Scope: This SAE Aerospace Recommended Practice (ARP) outlines a standard method for the checkout and calibration of electromagnetic interference measurement antennas. Its primary application is for use when measuring a source 1 m from the antenna in a shield room versus a source at a greater distance (far field). This is the typical distance used in performing military EMC testing. Thus, this is a method of calibration. Shield room characteristics are not considered. It does not address an unknown distributed source. Yet it is close to reality since it is based on another antenna that represents a distributed source. This document presents a technique to determine antenna factors for antennas used primarily in performing measurements in accordance with 2.1 and 2.2. The purpose of Revision B is to include the calibration of other antennas, such as small loop antennas that are also specified for use in these same references. Revision D includes a specific procedure for loop antennas that are separated by 1 m from the device under test. The Scope of Revision E is as follows: revision of main calibration method; update of process to reflect modern test equipment (i.e., network analyzers); inclusion of measurement uncertainty estimates; and resolution of conflicts between main method and alternative method suggested in Appendix C
Rationale: This SAE Aerospace Recommended Practice (ARP) outlines a standard method for the checkout and calibration of electromagnetic interference measurement antennas. Its primary application is for use when measuring a source 1 m from the antenna in a shield room versus a source at a greater distance (far field). This is the typical distance used in performing military EMC testing. Thus, this is a method of calibration. Shield room characteristics are not considered. It does not address an unknown distributed source. Yet it is close to reality since it is based on another antenna that represents a distributed source. This document presents a technique to determine antenna factors for antennas used primarily in performing measurements in accordance with 2.1 and 2.2. The purpose of Revision B is to include the calibration of other antennas, such as small loop antennas that are also specified for use in these same references. Revision D includes a specific procedure for loop antennas that are separated by 1 m from the device under test. The Scope of Revision E is as follows: revision of main calibration method; update of process to reflect modern test equipment (i.e., network analyzers); inclusion of measurement uncertainty estimates; and resolution of conflicts between main method and alternative method suggested in Appendix C

标准名称：	船用快关阀
英文名称：	Marine quick-closing valves
中标分类：	船舶 >> 船舶管路附件 >> 船用阀件
ICS分类：	造船和海上建筑物 >> 船舶和海上建筑物综合 >> 管路系统
替代情况：	替代GB/T 5744-1993
发布部门：	中华人民共和国国家质量监督检验检疫总局 中国国家标准化管理委员会
发布日期：	2008-02-14
实施日期：	2008-09-01
首发日期：	1985-12-06
作废日期：
主管部门：	中国船舶工业集团公司
提出单位：	中国船舶工业集团公司
归口单位：	全国船用机械标准化技术委员会管系附件分技术委员会
起草单位：	沪东中华造船（集团）有限公司、中国船舶工业综合技术经济研究院、通州世发船舶机械有限公司
起草人：	贺慧琼、罗发元、唐钰明、耿海平、蒋健、俞伟海
出版社：	中国标准出版社
出版日期：	2008-05-01
页数：	8页
计划单号：	20061579-T-522
书号：	155066·1-31313

本标准规定了法兰连接尺寸按GB/T 569和GB/T 2501的船用快关阀的分类和标记、要求、试验方法、检验规则、包装和贮存。 本标准适用于燃油及其他油类船舶管路系统用快关阀的设计、制造和验收。 本标准代替ＧＢ／Ｔ５７４４—１９９３《船用快关阀》。
本标准与ＧＢ／Ｔ５７４４—１９９３相比，主要有下列变化：
———修改了材料引用标准及材料牌号；
———修改了标记方式；
———修改了加工要求。

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下列文件中的条款通过本标准的引用而成为本标准的条款。凡是注日期的引用文件，其随后所有的修改单（不包括勘误的内容）或修订版均不适用于本标准，然而，鼓励根据本标准达成协议的各方研究是否可使用这些文件的最新版本。凡是不注日期的引用文件，其最新版本适用于本标准。
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GB/T1176-1987 铸造铜合金技术条件
GB/T1184-1996 形状和位置公差 未注公差值(eqvISO2768-2:1989)
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GB/T1804-2000 一般公差 未注公差的线性和角度尺寸的公差(eqvISO2768-1:1989)
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GB/T4423-2007 铜及铜合金拉制棒
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CB/T772-1998 碳钢和碳锰钢铸件技术条件
HG/T2579-1994 O 形圈橡胶材料 第1部分:用于普通液压系统
YB/T5318-2006 合金弹簧钢丝