Ndeupi ruzivo rwemusimboti runofanira kudzidziswa panguva yekushandiswa kwemamita conductivity?Chekutanga, kuitira kudzivirira electrode polarization, mita inogadzira yakagadzikana sine wave chiratidzo uye inoiisa kune electrode.Ikozvino inoyerera kuburikidza ne electrode inoenderana ne conductivity yemhinduro yakayerwa.Mushure mokunge mita ichishandura ikozvino kubva kune-high-impedance operational amplifier mumagetsi emagetsi, Mushure mokunge purogiramu-inodzorwa chiratidzo chekusimudzira, chikamu-sensitive kuona uye kusefa, chiratidzo chinogona kuratidza conductivity chinowanikwa;iyo microprocessor inoshandura kuburikidza nekuchinja kuti iite kuenzanisa chiratidzo chekushisa uye chiratidzo chekufambisa.Mushure mekuverenga uye muripo wekushisa, mhinduro yakayerwa inowanikwa pa25 ° C.Iko conductivity kukosha panguva uye kukosha kwekushisa panguva iyoyo.
Munda wemagetsi unokonzera kuti ayoni afambe mumushonga wakayerwa anogadzirwa nemaelectrode maviri ari kudhumana nemhinduro.Iwo maviri ekuyeresa emagetsi emagetsi anofanirwa kugadzirwa nezvinhu zvinodzivirira kemikari.Mukuita, zvinhu zvakadai setitanium zvinowanzoshandiswa.Electrode yekuyera inoumbwa nemagetsi maviri inonzi Kohlrausch electrode.
Chiyero che conductivity chinoda kujekesa zvinhu zviviri.Imwe ndiyo conductivity yemhinduro, uye imwe ndiyo hukama hwejometri ye 1/A mune mhinduro.Iyo conductivity inogona kuwanikwa nekuyera ikozvino uye voltage.Iyi misimboti yekuyera inoshandiswa mumidziyo yekuyeresa yanhasi yakananga.
Uye K=L/A
A--Ndiro inoshanda yekuyeresa electrode
L——Chinhambwe chiri pakati pemahwendefa maviri
Kukosha kweiyi kunonzi kugarisa sero.Muhupo hwemayunifomu emagetsi emagetsi pakati pemagetsi, electrode nguva dzose inogona kuverengwa nejometri dimensions.Kana mahwendefa maviri akaenzana ane nzvimbo ye 1cm2 akaparadzaniswa ne 1cm kuti aite electrode, nguva dzose ye electrode iyi K = 1cm-1.Kana iyo conductivity yakakosha G = 1000μS yakayerwa neiyi peya yemagetsi, ipapo conductivity yemushonga wakaedzwa K=1000μS/cm.
Mumamiriro ezvinhu akajairika, electrode inowanzoita chikamu chemagetsi chisina kufanana.Panguva ino, sero rinogara richifanirwa kutsanangurwa neyakajairwa mhinduro.Standard mhinduro dzinowanzo shandisa KCl mhinduro.Izvi zvinodaro nekuti conductivity yeKCl yakagadzikana uye yakarurama pasi petembiricha dzakasiyana uye kutariswa.The conductivity of 0.1mol/l KCl solution pa25°C is 12.88mS/CM.
Iyo inonzi non-uniform electric field (inonziwo stray field, leakage field) haina nguva dzose, asi ine hukama nemhando uye kuiswa kweion.Naizvozvo, maelectrode akachena emumunda ndiyo yakaipisisa, uye haigone kuzadzisa zvinodiwa zvehupamhi hwekuyera chiyero kuburikidza nekuenzanisa kumwe.
2. Ndeipi nzvimbo yekushandisa yemamita conductivity?
Minda inoshandisika: Inogona kushandiswa zvakanyanya mukuenderera mberi kwekutarisa maitiro ekuita mumhinduro dzakadai sesimba rekupisa, makemikari fetiraiza, metallurgy, kuchengetedza kwezvakatipoteredza, mishonga, biochemicals, chikafu uye pombi mvura.
3.Ndeipi iyo sero yenguva dzose yemamita conductivity?
"Maererano neformula K=S/G, sero rinogara K rinogona kuwanikwa nekuyera conductance G ye electrode conductivity mune imwe denderedzwa yeKCL solution.Panguva ino, iyo conductivity S yeKCL mhinduro inozivikanwa.
Iyo electrode yenguva dzose ye conductivity sensor inotsanangura zvakarurama maitiro ejometri emagetsi maviri e sensor.Ndiyo chiyero chehurefu hwemuenzaniso munzvimbo yakaoma pakati pe 2 electrodes.Iyo inobata zvakananga kunzwisisika uye kururamisa kwechiyero.Kuyera kwemasamples ane low conductivity kunoda low cell constants.Kuyerwa kwemasamples ane high conductivity kunoda masero epamusoro.Chiyereso chekuyeresa chinofanirwa kuziva sero rinogara reiyo yakabatana conductivity sensor uye kugadzirisa zvirevo zvekuverenga zvinoenderana.
4. Ndeapi masero emagetsi e conductivity mita?
Iwo maviri-electrode conductivity electrode parizvino ndiyo inonyanya kushandiswa mhando ye conductivity electrode muChina.Mamiriro ekuedza maviri-electrode conductivity electrode ndeyekupinza mapepa maviri eplatinamu pamapepa maviri egirazi akafananidzwa kana madziro emukati echubhu yegirazi kuti agadzirise pepa replatinum Nzvimbo uye chinhambwe chinogona kuitwa kuita maelectrodes e conductivity ane maitiro akasiyana anogara aripo.Kazhinji pane K=1, K=5,K=10 nemamwe marudzi.
Nheyo yemamita conductivity inokosha zvikuru.Paunosarudza chigadzirwa, unofanirawo kusarudza mugadziri akanaka.
Nguva yekutumira: Zvita-15-2021