梅特勒PH计安全操作规程

PH计安全操作程序危险提示和安全防范使用化学品和溶剂时，请配戴安全镜。电极包括玻璃部分。当需要测量正在搅拌中样品的pH值时，注意必须停止搅拌后测量。（1）脱下电极的橡皮套，用去离子水清洗后用滤纸吸干电极。（2）校准将电极放在一个校准缓冲液中并按Cal，在信号稳定后仪表根据预选终点方式终点或按Read,仪表将显示并锁定至相应缓冲液值。用去离子水清洗电极。如果要使用另一个pH缓冲液，请将电极放在下一个校准缓冲液中并按Cal.重复按Cal可以退出校准过程。电极状态指示：95-105%电极状态良好90-94%电极需要清洁85-89%电机出现故障（3）测量按Mode选择pH或者mV模式。将电极放在样品中并按Read以开始测量：小数点闪动。显示屏显示样品的pH值。自动测量终点A是仪表的默认设置。当传感器输出稳定后，显示屏自动固定，并显现√A。按住Read键，可以在自动和手动测量终点模式之间切换。要手动测量一个终点，可按Read显示屏固定并显现√。（4）维护确保电极始终存放在适当的存储液中。(3mol/lKCl溶液),不要使之干涸。为了获得最大的精确度，任何附着或凝固在电极外部的填充液均应用蒸馏水及时除去。不要擦拭电极，因为这样会引起极化导致响应速度变慢。（5）注意：将电极存储在去离子水中会极大的缩短电极的使用寿命。ElectrodeKClsolutionBuffersolutionsDisplaydataPHMETERSTANDARDOPERATIONPROCEDURE(pHmeterMP220)Hazard&PPEItisadvisabletowearsafetyglasseswhenhandlingcleaningagents.Theelectrodescontainglassparts.Whenmeasuringthesample’spHvalueinamixer,besuretostopthestirrer.（6）Removetherubbercapfromthefillhole,rinsetheelectrodewithDIwaterandblotdrywithtissue.（7）CalibrationPlacetheelectrodeinacalibrationbufferandpressCal.TheendpointaccordingtothepreselectedendpointmodeafterthesignalhasstabilizedorafterpressingRead,themeterdisplaysandfreezestherelevantbuffervalue.Rinsetheelectrodewithdeionizedwater.IfyouwanttouseanotherpHbuffer,placetheelectrodeinthenextcalibrationbufferandpressCalagain.PressCalrepeatedlytoexitthecalibrationroutine.ElectrodeConditionIndicator95-105%electrodeingoodcondition90-94%electrodeneedscleaning85-89%electrodeneedsconditioning（8）MeasurementSelectpHormVmodebyModePressRead.PlacetheelectrodeinthesampleandpressReadtostartthemeasurement:thedecimalpointblinks.ThedisplayshowsthepHofthesample.TheautomaticendpointAisthedefaultsettingofthemeter.Whenthesignalhasstabilized,thedisplayfreezesautomatically,and√Aappears.BypressingandholdingdownRead,youcanswitchbetweentheautoandmanualendpointmodes.Tomanuallyendpointameasurement,pressRead:thedisplayfreezesand√appears.（9）MaintenanceMakesuretheelectrodeisalwaysstoredinanappropriatestoragesolution(3mol/lKClsolution),anddonotallowittodryout.Formaximumaccuracy,anyfillingsolutionthatmayhave“crept”andencrustedtheoutsideoftheelectrodeshouldberemovedwithdeionizedwater-donotwipetheelectrodeasthismaycausepolarizationandslowresponse.（10）Note:Storageindistilledwaterwilldrasticallydecreasethelifetimeoftheelectrode.KClsolutionBuffersolutionsDisplaydata