ISO 8630-2-1987 信息处理数据交换用130mm(5.25in)改进调频制记录,密度为13262ftrad、每面80道的软盘第2部分:用作77道的磁道格式A

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【英文标准名称】:Informationprocessing;Datainterchangeon130mm(5.25in)flexiblediskcartridgesusingmodifiedfrequencymodulationrecordingat13262ftprad,on80tracksoneachside;Part2:TrackformatAfor77tracks
【原文标准名称】:信息处理数据交换用130mm(5.25in)改进调频制记录,密度为13262ftrad、每面80道的软盘第2部分:用作77道的磁道格式A
【标准号】:ISO8630-2-1987
【标准状态】:现行
【国别】:国际
【发布日期】:1987-06
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/IECJTC1
【标准类型】:()
【标准水平】:()
【中文主题词】:信息交换;磁道格式;数据处理;规范;信息处理;数据记录装置;数据记录;信息交流;磁盘;数据媒体;软盘
【英文主题词】:Datamedia;Dataprocessing;Datarecording;Flexibledisks;Informationexchange;Informationinterchange;Informationprocessing;Magneticdisks;Magneticproperties;Memory;Specification(approval);Specifications;Stores;Trackformats;Tracklayout;Tracks;Two-frequencyrecordingmode
【摘要】:ThispartofISO8630specifiesthequalityofrecordedsignals,thetracklayout,andatrackformattobeusedon130mm(5.25in),13262ftpradflexiblediskcartridgesintendedfordatainterchangebetweendataprocessingsystems.NOTE—NumericvaluesintheSIand/orImperialmeasurementsysteminthispartofISO8630mayhavebeenroundedoffandthereforeareconsistentwith,butnotexactlyequalto,eachother.Eithersystemmaybeused,butthetwoshouldbeneitherintermixednorre-converted.TheoriginaldesignwasmadeusingImperialunitsandfurtherdevelopmentsweremadeusingSIunits.
【中国标准分类号】:L64
【国际标准分类号】:35_220_21
【页数】:12P;A4
【正文语种】:英语

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上一篇: ISO 8630-1-1987 信息处理数据交换用130mm(5.25in)改进调频制记录,密度为13262ftrad、每面80道的软盘第1部分:尺寸、物理性能和磁性能
下一篇: ISO 8630-3-1987 信息处理数据交换用130mm(5.25in)改进调频制记录,密度为13262ftrad、每面80道的软盘第3部分:用作80道的磁道格式B

MIL-C-3849/6C, MILITARY SPECIFICATION SHEET CORD, ELECTRICAL (TINSEL) CLASS SPL, STYRENE BUTADIENE RUBBER (SBR) INSULATED, POLYCHLOROPRENE JACKETED (21 FEB 1973)., The complete requirements for procuring the cords described herein shall consist of this document and the latest issue of specification MIL-C-3849.【英文标准名称】:Electricalsafetyinlowvoltagedistributionsystemsupto1000Va.c.and1500Vd.c.Equipmentfortesting,measuringormonitoringofprotectivemeasures-InsulationmonitoringdevicesforITsystems
【原文标准名称】:低于1000V交流和1500V直流低压配电系统的电气安全性.保护措施的测试、测量或监视设备.IT系统绝缘监视装置
【标准号】:BSEN61557-8-2007
【标准状态】:现行
【国别】:英国
【发布日期】:2007-09-28
【实施或试行日期】:2007-09-28
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:交流电网络;通信网;定义;直流装置;直流网络;电气工程;电气安全性;电磁试验;信息系统;信息技术;铭刻;额定电压装置;绝缘监视装置;绝缘电阻;绝缘件;低压电源;低压设备;测量设备;医疗设备;医疗技术学;操作说明书;保护措施;常规检验;规范(验收);监督(认可);电信;试验
【英文主题词】:Alternatingcurrentnetworks;Communicationnetworks;Definition;Definitions;Directcurrentinstallations;Directcurrentnetworks;Electricalengineering;Electricalsafety;Electromagnetictests;Informationsystems;Informationtechnology;Inscription;Installationsforratedvoltages;Insulatingmonitoringdevices;Insulatingresistance;Insulations;Lowvoltagemains;Low-voltageinstallations;Measuringequipment;Medicalequipment;Medicaltechnology;Operatinginstructions;Protectivemeasures;Routinechecktests;Specification(approval);Surveillance(approval);Telecommunications;Testing
【摘要】:ThispartofIEC61557specifiestherequirementsforinsulationmonitoringdevices(IMD)whichpermanentlymonitortheinsulationresistancetoearthofunearthedITa.c.systems,forITa.c.systemswithgalvanicallyconnectedd.c.circuitshavingnominalvoltagesupto1000Va.c.,aswellasofunearthedITd.c.systemswithvoltagesupto1500Vd.c.independentfromthemethodofmeasuring.NOTE1ITsystemsaredescribedinIEC60364-4-41amongstotherliterature.Additionaldataforaselectionofdevicesinotherstandardsshouldbenoted.NOTE2VariousstandardsspecifytheuseofinsulationmonitoringdevicesinITsystems.Insuchcases,theobjectiveoftheequipmentistosignaladropininsulationresistancebelowaminimumlimit.NOTE3InsulationmonitoringdevicesaccordingtothispartofIEC61557mayalsobeusedforde-energizedelectricalsystems.
【中国标准分类号】:K09;L98;N20
【国际标准分类号】:17_220_20
【页数】:26P.;A4
【正文语种】:英语