Dab tsi yog qhov xoom taw tes drift ntawm pH meter thiab yuav daws nws li cas!
Dab tsi yog qhov xoom taw tes drift ntawm pH meter thiab yuav daws nws li cas! Txhawm rau daws qhov teeb meem ntawm xoom taw tes drift ntawm pH meter, koj yuav tsum xub nkag siab qhov xoom taw tes drift. Muaj ntau yam uas cuam tshuam rau xoom taw tes drift ntawm lub 'meter', tshwj xeeb tshaj yog cov txuas ncaj qha amplifier, uas yog ib qho nyuaj rau kev kov yeej tag nrho cov kev cuam tshuam loj ntawm xoom taw tes drift. Thaum cov khoom siv hluav taws xob hloov pauv hloov pauv, lub xeev ua haujlwm ntawm amplifying element yam ntxwv hloov, thiab cov khoom siv hluav taws xob hloov pauv nrog qhov ntsuas kub thiab lub sijhawm ua haujlwm. Thaum lub tswv yim yog xoom, cov zis fluctuates, uas yog, xoom point drift. Ib zaug ntxiv, peb yuav tsum nrhiav qhov teeb meem. Yuav muaj ntau yam teeb meem ntawm PH electrode. Piv txwv li, electrode fouling yuav ua rau muaj kev tsis sib haum xeeb ntawm cov electrodes, ua rau drift. Kev cuam tshuam electromagnetic ntev yuav ua rau muaj teeb meem. Lub polarization ntawm cov electrodes kuj yuav ua rau muaj teeb meem. tseem yuav raug cuam tshuam. 1. Muaj ntau txoj hauv kev los txo qhov kev xav los ntawm xoom taw tes drift: 1. Siv lub hwj chim tswj, 2. Siv AC amplifier circuit. 3. Dynamic input impedance. Kev daws teeb meem rau kev ruaj ntseg thiab xoom taw tes drift ntawm industrial pH meters thiab kuaj pH meters.
1. Siv cov kev tawm tswv yim tsis zoo Circuit Court. Txhawm rau kom tsis txhob xoom drift thiab txhim kho kev ruaj ntseg, cov amplifiers siv hauv pH meters tag nrho siv cov lus qhia tsis zoo. Siv DC cov lus tawm tswv yim tsis zoo tuaj yeem tsis tsuas yog ua kom cov tswv yim impedance ntawm lub ntsuas, tab sis kuj txhim kho qhov ruaj khov ntawm lub ntsuas. degree, kom qhov rhiab heev thiab ntau yam ntawm cov cuab yeej tsis cuam tshuam los ntawm kev hloov pauv hauv cov khoom siv hluav taws xob.
2. Kev xaiv thiab txij nkawm ntawm pH electrode. Lub pH meter composite electrode yog cov khoom siv tseem ceeb los xyuas kom meej tias qhov ntsuas ntsuas tau raug. Cov electrodes zoo heev yuav tsum raug xaiv los tiv thaiv kev cuam tshuam ntawm ntau yam tshuaj, qhov kub thiab txias, kev vibration thiab lwm yam kom muaj kev ruaj ntseg, xws li hauv cov nplaum Tom qab kuaj hauv cov qauv, nws yuav tsum tau ntxuav ntau zaus kom tshem tawm cov kua seem ntawm cov electrode kom tsis txhob lub teeb conjunctiva ntawm lub electrode, uas yuav txo tau qhov rhiab heev thiab thaum kawg ua rau kev ntsuas tsis ua hauj lwm.
