南方彩票网

电导率测量实用指南

DAODIANLVSHIRONGYECHUANDI(CHUANDAO)DIANLIUDENENGLI。TASHIDIANZULV(OUMU)DEDAOSHU。YINCI,DIANDAOLVYONGYUCELIANGZAIJIXINGRONGYE(LIRUSHUI)ZHONGYIBEIDIANLIDERONGJIEGUTIDENONGDU。CHANGYONGDEDULIANGDANWEISHIMEILIMIXIMENZIDEBAIWANFENZHIYI(WEIXIMENZIMEILIMIHUOµS / cm)。DANGCELIANGGENGNONGSUODERONGYESHI,DANWEIBIAOSHIWEIHAOXIMENZI/ cm(mS / cm),JI-10 -3 S-cm(XIMENZIDEQIANFENZHIYI)。WEILEBIANYUBIAODA,1000 µS / cmDENGYU1 mS / cm。TONGCHANG,DIANDAOLVTONGCHANGYONGXIMENZIBIAOSHI。DANSHI,YOUSHI(BUZHENGQUEDI)JIANGZHEIZHONGDULIANGDANWEICHENGWEIWEIMUOUERBUSHIWEIXINGXIMENZI。“ mho ”YICIZHISHIOUMUZHEIGECIDEFANPIN。 

各种行业已经采用了几种电导率表达方式,作为将表达单位制成整数的一种方式。水软化工业指的是硬度的“颗粒”,并使用TDS或总溶解固体作为度量标准。尽管TDS实际上是一种重量分析法,但由于在溶液中固体主要以离子形式存在,因此可以用电导率近似估算它们。TDS标尺使用2 µS / cm = 1 ppm(百万分之几,以CaCO 3计)。它也表示为1 mg / l TDS。尽管测量方法相同,但是某些电导率仪南方彩票网可以进行转换并以许多不同单位表示测量结果。  这对于习惯一种特定测量单位的用户很有帮助。 

水电导率表  
S / cm 米/厘米 百万分之几
完全纯净水 0.055    
典型的去离子水 0.1    
蒸馏水 0.5    
反渗透水
50-100
  25-50
国产“自来水” 500-800 0.5-0.8 250-400
饮用水(**) 1055 1.055 528
海水 56,000 56 28,000
微咸水 100,000 100 50,000

电阻率与电导率

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南方彩票网 YINWEIKONGQIKERONGYUCHAOGAOCHUNSHUI(18.3 MΩ -cm),SUOYIZAIDAKAIDERONGQIZHONGDUSHUBUWENDING。 

温度补偿

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探头类型和极化误差

ANPEI

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DIANWEIJI

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YOUYUDIANWEI(4HUAN)DIANDAOLVCHUANGANQIBUSHOUDIANJIEDEXIANZHI(TONGCHANGHUIYINGXIANGANPEITANTOU),YINCIKEJIANGQIYONGYUCELIANGGENGDAFANWEIDEDIANDAOLV。SHIJISHANG,KEYISHIYONGBUXIUGANGHUAN。DANSHI,SHOUXUANDEJINSHUSHIBO,YINWEITAKEYICHENGSHOUGENGGAODEWENDUBINGCHANSHENGGENGWENDINGDEDUSHU。BOJINCHUANGANQIYEGENGYIYUQINGJIE。XIANJINDEWEICHULIQIDIANDAOLVYIQIKEYIGAIBIANSHIJIADAOCHUANGANQISHANGDEDIANYA,CONGERSHITAMENNENGGOUJINYIBUKUOZHANDIANWEIJIDEFANWEI。ZHEIXIANGJISHUSHI**DIANBIAONENGGOUSHIYONGYIGETANTOUCELIANGQULIZISHUIDEGAOHEDIDIANDAOLVYIJICHAODIDIANDAOLV。

GANYINGSHIHUOHUANXING

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校准

大多数电导率仪可以使用已知值的标准进行校准。通常使用1413 µS / cm的值。某些仪表将允许用户从各种预选值中进行选择。校准应使用尽可能接近所测溶液的标准液进行。更**的仪表将允许在两个,三个,四个甚至五个点进行校准。这样就可以在更宽的测量值范围内获得良好的精度。类似于在pH计中自动识别缓冲液,在校准过程中将探头浸入水中时,有些仪器甚至可以识别该标准值。这只是使电导率仪易于使用的另一种方法。温度在电导率测量中非常重要,还应至少校准一个点,**校准两个不同的点。