【英文标准名称】:BusinessTeleCommunications(BTC)-Planningofloudnessratingandechovaluesforprivatenetworksdigitallyconnectedtothepublicnetwork;EnglishversionETS300283:1994
【原文标准名称】:商务电信(BTC).与公共网络数字连接的专用网络用响度值和回波值的设计;英文版本ETS300283:1994
【标准号】:DINETS300283-1994
【标准状态】:现行
【国别】:德国
【发布日期】:1994-09
【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】:数据传送;数字信号;商务电讯;回波;基准当量;通信网;私人网络;电信;电信;通信设备;数字的;数据通信;额定值;综合服务数字网络;电气工程;计划;音量
【英文主题词】:Businesstelecommunications;Communicationnetworks;Communications;Datacommunication;Datatransfer;Digital;Digitalsignals;Echo;Electricalengineering;ISDN;Loudnesslevel;Planning;Privatenetworks;Ratings;Referenceequivalent;Telecommunication;Telecommunications;Volume(sound)
【摘要】:ThedocumentdealswiththetransmissionplanningforprivatebranchnetworkswithdigitalaccesstotheISDNpublicswitchedtelephonenetwork.
【中国标准分类号】:M11
【国际标准分类号】:33_040_40
【页数】:14P.;A4
【正文语种】:德语
Product Code:SAE J1849
Title:Emergency Vehicle Sirens
Issuing Committee:J1849 Emergency Vehicle Siren Task Force
Scope:This SAE Recommended Practice provides laboratory test procedures, requirements and guidelines for electronic siren systems with a single loudspeaker, and electromechanical sirens for use on authorized emergency vehicles, which call for the right-of-way. This document is applicable only to such sirens that have all dimensions across the sound-emitting opening equal to or less than 0.5 m. Test procedures and performance requirements for individual system components are not included in this version.Data obtained from measurements of siren performance depend not only on the characteristics of the siren tested, but additionally on the test procedures and the characteristics of the measurement instrumentation and test environment. These additional factors must be well defined and controlled to obtain reliable data. Detailed test methods are described here, which include specifications for a laboratory environment, to minimize the measurement uncertainty and obtain accurate and reproducible measurement results. Such results are necessary to qualify the performance of all sirens as equally as practicable. Requirements have been established based on the laboratory-measured performance of sirens that have been effective in emergency service.
基本信息
| 标准名称： | 化学试剂铁测定通用方法 |
| 英文名称： | Chemical reagent - General method for the determination of iron |
| 中标分类： |
化工 >>
化学试剂 >>
化学试剂综合 |
| ICS分类： |
化工技术 >>
分析化学 >>
化学试剂
|
| 替代情况： | 替代GB/T 9739-1988 |
| 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： | 2006-11-03 |
| 实施日期： | 2007-06-01 |
| 首发日期： | 1988-09-05 |
| 作废日期： | |
| 主管部门： | 中国石油和化学工业协会 |
| 提出单位： | 中国石油和化学工业协会 |
| 归口单位： | 全国化学标准化技术委员会 |
| 起草单位： | 国药集团化学试剂有限公司 |
| 起草人： | 陈浩云、陈红 |
| 出版社： | 中国标准出版社 |
| 出版日期： | 2007-06-01 |
| 页数： | 4页 |
| 计划单号： | 20063881-T-606 |
适用范围
本标准规定了用1，10-菲?啉比色测定铁的通用方法。本标准适用于化学试剂中微量铁的测定。目视比色法的检测范围为0.04ug/mL~2ug/mL（以Fe计），分光光度法的检测范围为0.08ug/mL~2ug/mL（以Fe计）。
前言
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目录
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引用标准
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所属分类： 化工 化学试剂 化学试剂综合 化工技术 分析化学 化学试剂