Ndeupi ruzivo rwemusimboti runofanira kudzidziswa panguva yekushandiswa kwemamita conductivity? Chekutanga, kuitira kudzivirira electrode polarization, mita inogadzira yakanyanya kugadzikana 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.
Uye K=L/A
A--Ndiro inoshanda ye electrode yekuyeresa
L——Chinhambwe chiri pakati pemahwendefa maviri
Kukosha kweiyi kunonzi kugarisa sero. Pamberi pesimba remagetsi rakafanana 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, iyo electrode inowanzoita chikamu chisina yunifomu yemagetsi munda. 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 kudzikisira. Iyo conductivity ye0.1mol/l KCl mhinduro pa25°C i12.88mS/CM.
Iyo inonzi 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 kwemaitiro ekuita mumhinduro dzakadai sesimba rekupisa, makemikari fetiraiza, metallurgy, kuchengetedza kwezvakatipoteredza, mishonga, biochemicals, chikafu uye pombi mvura.
3.Ndeipi sero rinogara riri conductivity mita?
"Maererano neformula K=S/G, sero rinogara riri K rinogona kuwanikwa nekuyera conductance G ye electrode conductivity mune imwe concentration yeKCL solution. Panguva ino, conductivity S yemushonga weKCL 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 kurongeka kwechiyero. Kuyera kwemasamples ane low conductivity kunoda low cell constants. Kuyerwa kwemasamples ane high conductivity kunoda yakakwirira cell constants. Chiyereso chekuyeresa chinofanirwa kuziva sero rinogara reiyo yakabatana conductivity sensor uye kugadzirisa iyo yekuverenga yakatarwa zvinoenderana.
4. Ndeapi masero akasimba eiyo 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 platinum sheet Area uye chinhambwe chinogona kuitwa kuita conductivity maelectrodes ane akasiyana anogara achikosha. 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