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地球磁场Earth'sMagneticFieldEX-9913地球磁场Earth'sMagneticField所需仪器EQUIPMENTINCLUDED:1磁场传感器MagneticFieldSensorCI-6520A1零高斯腔体ZeroGaussChamberEM-86521转动传感器RotaryMotionSensorCI-65381罗盘DipNeedleSF-86191通用桌夹UniversalTableClampME-9376B145厘米不锈钢杆子（消磁）45cmStainless(non-magnetic)SteelRodME-87361可调节角度夹AdjustableAngleClampME-8744需要但不包含NOTINCLUDED,BUTREQUIRED:1ScienceWorkshop500or750Interface1DataStudioSoftwareINTRODUCTIONThemagnitudeanddirectionoftheEarth'smagneticfieldaremeasuredusingaMagneticFieldSensormountedonaRotaryMotionSensor.TheMagneticFieldSensorisrotatedthrough360degreesbyrotatingtheRotaryMotionSensorpulleybyhand.TheMagneticFieldSensoriszeroedusingtheZeroGaussChamber,thewallsofwhicharemadeofahighlypermeablematerialwhichredirectsthemagneticfieldaroundthechamber.THEORYThemagnitudeoftheEarth'sfieldvariesoverthesurfaceoftheEarth.ThehorizontalcomponentoftheEarth'smagneticfieldpointstowardNorth(magneticSouth).ThenorthendofacompassneedleisattractedtothesouthendoftheEarth'smagneticfield.SothepolewhichisreferredtoasNorthisactuallyasouthmagneticpole.Thetotalfieldpointsatananglefromthehorizontal.Thisangle(θ)iscalledthedipangle.AnexamplefortheNorthernhemisphereisshowninFigure1.WrittenbyAnnHanksTranslatedBykImI1/6科艺仪器有限公司0215595691地球磁场Earth'sMagneticFieldEX-9913BHorizontalBVerticalBTotalθHorizontalTotalBcosBθ=Figure1:ComponentsoftheMagneticField(NorthernHemisphere)设置SETUP注意NOTE:实验时，请远离所有可以产生磁场的设备（电器，电脑，条形磁铁）。也要远离铁磁体（铁，钢制桌椅）。Duringthisexperiment,keeptheapparatusawayfromallsourcesofmagneticfields(electrical,computers,computerinterface,barmagnets).Alsokeepawayfromallferromagneticmaterials(iron,steelchairsandtables).1.将可调节角度夹（AdjustableAngleClampME-8744）与旋转运动传感器（RotaryMotionSensorCI-6538）相连。AttachtheAdjustableAngleClamptotheRotaryMotionSensor.2.将配套的无磁性不锈钢杆子穿过桌夹。桌夹由铝制成。Usetheprovidednonmagneticstainlesssteelrodinthetableclamp.Thetableclampismostlyaluminum.3.把旋转运动传感器（RotaryMotionSensorCI-6538）固定在支撑杆上。AttachtheRotaryMotionSensortothesupportrod.4.把手柄旋在磁场传感器（MagneticFieldSensorCI-6520A）。ScrewthehandleontotheMagneticFieldSensor.5.如图2，把磁场传感器（MagneticFieldSensorCI-6520A）的手柄插在旋转运动传感器（RotaryMotionSensorCI-6538）的轴上。把滑轮也装在旋转运动传感器（RotaryMotionSensorCI-6538）的轴上。把O型橡胶圈套在滑轮上。AlignWrittenbyAnnHanksTranslatedBykImI2/6科艺仪器有限公司0215595691地球磁场Earth'sMagneticFieldEX-9913thekeyinthehollowhandlewiththeslotontheRotaryMotionSensorshaftandslidetheMagneticFieldSensorontotheRotaryMotionSensorshaft(seeFigure2).PutthepulleyonthesideoftheRotaryMotionSensorthatisoppositetotheMagneticFieldSensor.ThispulleywillbeusedtorotatetheMagneticFieldSensorbyhand.Puttheo-ringonthelargeststepofthepulley.Figure2:CompleteSetup6.把量角器插在旋转运动传感器（RotaryMotionSensorCI-6538）上。注意当旋转磁场传感器（MagneticFieldSensorCI-6520A）时，不会碰到量角器。把量角器上的螺丝取走，因为他们是铁磁性的。SlidetheAngleIndicatorontotheendoftheRotaryMotionSensor,orientingitawayfromtheMagneticFieldSensorsoitwon'tbeinthewaywhentheMagneticFieldSensorisrotated.RemovethescrewandnutfromtheAngleIndicatorbecausetheyareferromagneticandwillinterferewiththisexperiment.7.把旋转运动传感器（RotaryMotionSensorCI-6538）插入500接口的1、2通道。PlugtheRotaryMotionSensorintoChannels1and2ontheScienceWorkshop500interface.8.把磁场传感器（MagneticFieldSensorCI-6520A）插在500接口的A通道。传感器上增益选择X100，磁场测量方向选择轴向。PlugtheMagneticFieldSensorintoChannelAontheinterface.Setthesensor'sgainswitchtox100.SetWrittenbyAnnHanksTranslatedBykImI3/6科艺仪器有限公司0215595691地球磁场Earth'sMagneticFieldEX-9913thesensor'sdirectionswitchonaxialtomeasurethemagneticfieldalignedwiththesensorprobe.9.打开名为“EarthMagField”的DataStudio文件。OpentheDataStudiofilecalledEarthMagField.步骤PROCEDURE地球磁场的水平分量HorizontalComponentoftheMagneticFieldoftheEarth1.为了能使磁场传感器（MagneticFieldSensorCI-6520A）在水平方向旋转，调整与旋转运动传感器（RotaryMotionSensorCI-6538）相连的夹子，使得量角器读数为90度，并且磁场传感器（MagneticFieldSensorCI-6520A）位于上面。ToallowtheMagneticFieldSensortorotateinahorizontalcircle,adjusttheRotaryMotionSensorclampsotheangleindicatorreads90degreeswiththeMagneticFieldSensorontop.2.将罗盘水平放置于旋转运动传感器（RotaryMotionSensorCI-6538）下面。调整旋转运动传感器（RotaryMotionSensorCI-6538）的外壳与罗盘的磁针方向一致。这样，可以将旋转运动传感器（RotaryMotionSensorCI-6538）外壳作为地球磁场方向的参考。然后将罗盘拿走，以免影响实验。PuttheDipNeedleinitshorizontalorientationandpositiontheDipNeedledirectlybelowtheRotaryMotionSensor.AlignthecaseoftheRotaryMotionSensorwiththecompassneedle.UsetheRotaryMotionSensorcaseasareferencetothegeneraldirectionoftheEarth'smagneticfield.RemovetheDipNeedlesoitsmagneticfieldwon'tinterferewiththeexperiment.3.转动磁场传感器（MagneticFieldSensorCI-6520A），让探头与由旋转运动传感器（RotaryMotionSensorCI-6538）外壳指示的地球磁场方向相互垂直。将零高斯室套在磁场传感器（MagneticFieldSensorCI-6520A）的探头上，按一下传感器上的“tare”按钮。RotatetheMagneticFieldSensorsothelengthoftheprobeisperpendiculartothedirectionoftheEarth'sfieldasindicatedbytheRotaryMotionSensorcase.SliptheZeroGaussChamberovertheMagneticFieldSensorprobeandpressthetarebuttonontopoftheMagneticFieldSensor.ThiswillensurethatthemaximumontheMagneticFieldSensorwillnotbeexceededduringtheexperiment.4.保持磁场传感器（MagneticFieldSensorCI-6520A）处于第三步中描述的位置，点击DataStudio中的“开始”按钮。慢慢地，平稳地旋转磁场传感器（MagneticWrittenbyAnnHanksTranslatedBykImI4/6科艺仪器有限公司0215595691地球磁场Earth'sMagneticFieldEX-99