负温高压DSC204HP操作手册NETZSCH耐驰科学仪器商贸(上海)有限公司-1-负温高压DSC204HPPhoenix®操作手册负温高压DSC204HP操作手册NETZSCH耐驰科学仪器商贸(上海)有限公司-2-Contents:目录:Introduction简介Chapter1:LiquidNitrogenCooling第一章:液氮冷却系统Chapter2:OperatingtheInstrument第二章:仪器操作负温高压DSC204HP操作手册NETZSCH耐驰科学仪器商贸(上海)有限公司-3-Introduction简介OnthefollowingpagesyouwillfindsomeremarksconcerningtheinstallationandoperationofDSC204HPSoforlowtemperatures.Theseremarksaremeantasasupplementforthe“OperatingInstructionsDSCApparatusDSC204HPPhoenix®”whicharedeliveredtogetherwiththeinstrumentDSC204HPSoforlowtemperatures.在以下说明的负温高压DSC204HP的安装与操作中,会出现一些新的器件,这些器件是常规高压DSC204HP的补充件,是伴随负温仪器订制发货的。Thefollowingparagraphsof“OperatingInstructionsDSCApparatusDSC204HPPhoenix®”arenotvalidfortheinstrumentDSC204HPSoforlowtemperatures:所以,以下常规高压系统的若干章节(对应英文原稿)将不再适用于负温高压系统:Chapterlll:Figure7onpage10isnotvalid.Pleaserefertopage6ofchapter2ofthismanual.第三章:第7页至第10页失效,具体可参照本说明书第二章第6页;ChapterlV:Figure1onpage13isnotvalid.Pleaserefertopage6ofchapter2ofthismanual.第四章:第1页至第13页无效,具体可参照本说明书第二章第6页;Calibrationprocedureonpages14/15:Usevalves(9)and(9a)insteadofvalves(10)and(10a),respectively.有关校正过程的第14/15页:用减压阀(9)和高压阀(9a)分别代替(10)和(10a);Calibrationprocedureonpages14/15:ItisnotpossibletoadjustagasflowfortheinstrumentDSC204HPSoforlowtemperatures.有关校正过程的第14/15页:对负温仪器不能对气体流量做调整;Operatingmodes(l)to(lV)(pages23to35)arenotvalid.Pleasereferto“OperatingMode”onpage4ofchapter2ofthismanual.操作模式1至操作模式4(从第23页到35页)不再有效,请参考本手册(英文原稿)的第二章第4页。负温高压DSC204HP操作手册NETZSCH耐驰科学仪器商贸(上海)有限公司-4-Chapter1第一章LiquidNitrogenCooling液氮冷却系统Connectionofthethermostat循环水的连接Reliefvalves安全阀负温高压DSC204HP操作手册NETZSCH耐驰科学仪器商贸(上海)有限公司-5-InstallationofLiquidNitrogenCoolingSystem液氮冷却系统的安装ElectricalConnections电路的连接负温高压DSC204HP操作手册NETZSCH耐驰科学仪器商贸(上海)有限公司-6-Connectionofthecoolingtubes连接冷却管道Inletforliquidnitrogen液氮的入口Themountingofthecoolingtubeattheinletforliquidnitrogenisshownonthefollowingphotographs(a)to(c).按图(a)至(c)的顺序固定液氮入口的冷却管道负温高压DSC204HP操作手册NETZSCH耐驰科学仪器商贸(上海)有限公司-7-c)Completelymountedinletforliquidnitrogen:c)如图全部接好液氮入口管道Outletforliquidnitrogen液氮的出口Theoutletforliquidnitrogenislocatedattherearpanelofthemeasuringpartbelowthedeflectionplate.液氮的出口装在测量单元后部保护板下Forsafetyreasons,itisstronglyrecommendednottoconnectatubetotheoutletforliquidnitrogen.Ifthereisaleakinthecoolinglineinsidethepressuretankthemaybeleakinggasstreammightaffectthistubeinanunpredictableway.安全起见,强烈建议,不要在液氮出口接任何管道,以免由于液氮泄漏对此管道造成不可预知的伤害;Itshouldbeensuredthatcoldnitrogenwhichleavestheoutletdoesnotcauseanydisturbanceofadjacentworkplaces.这也是为了保证液氮从出口排除后不会影响临近的元器件。负温高压DSC204HP操作手册NETZSCH耐驰科学仪器商贸(上海)有限公司-8-Connectionofthethermostat循环水的连接Thethermostatlinehastobeconnectedbothtothelidofthepressurecellandtothebottomplate(sequence:thermostat–lid–bottomplate–thermostat).循环水必须同时接到高压釜底盖子和底盘上(顺序是:循环水箱---高压釜盖子---底盘---循环水箱)Theconnectionsareshowninthepicturebelow.Thethermostattemperatureshouldbeadjustedtoaround25°C.如图所示连接,将水温设定为25℃左右。负温高压DSC204HP操作手册NETZSCH耐驰科学仪器商贸(上海)有限公司-9-Reliefvalves安全阀Theinstrumentisequippedwithreliefvalvestopreventdamagesoftheinstrument.为了保护仪器,仪器配装有安全阀。Gaseswhichwereliquefiedwhencoolingdownunderhigherpressure(e.g.CO2)caneffectsuchafastincreaseofthepressureinthepressuretankwhenheatingupthroughthetransferintothegasphasethatthepressureregulationcannotcompensatethisincrease.Thisisofparticularimportanceifyouworkathighpressurebecausethenundercertaincircumstancestheburstpressureoftheburstdisccanbeexceeded.气体在高压负温时会液化(例如CO2),当它受热气化时压力会快速升高,以至压力调节器来不及调节补偿,这就有可能会超过安全阀爆破隔膜的极限值。安全阀:大于155bar时工作负温高压DSC204HP操作手册NETZSCH耐驰科学仪器商贸(上海)有限公司-10-Chapter2第二章OperatingtheInstrument仪器操作负温高压DSC204HP操作手册NETZSCH耐驰科学仪器商贸(上海)有限公司-11-InstructionsforoperationoftheDSC204HPSoforlowtemperatures负温高压DSC操作指南Thephasediagramoftheusedsortofgasmustbeconsidered.Especiallysubstanceswhichwereliquefiedwhencoolingdownunderhigherpressure(e.g.CO2)caneffectsuchafastincreaseofthepressureinthepressuretankwhenheatingupthroughthetransferintothegasphasethatthepressureregulationcannotcompensatethisincrease.Thisisofparticularimportanceifyouworkathighpressurebecausethenundercertaincircumstancestheburstpressureoftheburstdisccanbeexceeded.要充分考虑到使用的各种气体的相图,特别是某些气体在高压负温时会液化(例如CO2),当它受热气化时压力会快速升高,以至压力调节器来不及调节补偿,这就有可能会超过安全阀爆破隔膜的极限值。Itdependsontheusedsortofgasandontheworkingpressurewhichmaximumtemperaturecanbereachedwithwhichheatingrate.Fornitrogene.g.thefollowingisvalid:根据不同性质的气体,要充分考虑到在指定的工作压下,它所能采用的升温速度与所能达到的最高温度之间的关系。例如:如下氮气的工艺是可行的:At1bar(absolute)theheatingrateof20K/mincanbeadheredupto450°C,在绝对压力1bar时,可以采用20K/min的速度加热到450℃,at150bartheheatingrateof20K/mincanbeadheredupto400°C.在150bar时,采用20k/min的速度只能加热到400℃。负温高压DSC204HP操作手册NETZSCH耐驰科学仪器商贸(上海)有限公司-12-Theperformancedataforcoolingdownfortheworkinggasnitrogenissummedupinthefollowingchapter:有关氮气冷却的技术数据总结如下:Table1:MinimumtemperaturesTminwhichcanbereachedforagivencoolingratebycontrolledcooling.图表一:最低温度表示的是在不同的给定速度下达到的极限值负温高压DSC204HP操作手册NETZSCH耐驰科学仪器商贸(上海)有限公司-13-AsthecoolingsystemisrelativelyinertincomparisontothenormalPhoenixsetupthecoolingshouldbeactivatedintimebeforeacoolingsegment,e.g.inanisothermsegmentprecedingthecool