Dab tsi ua rau pH meter xoom drift thiab yuav kho nws li cas!
Dab tsi ua rau pH meter xoom drift thiab yuav kho nws li cas! Yuav kom daws tau qhov pH meter qhov teeb meem xoom drift, ib qho yuav tsum xub nkag siab txog xoom drift. Lub ntsuas hluav taws xob xoom drift yog cuam tshuam los ntawm ntau lub ntsiab lus, tshwj xeeb tshaj yog qhov sib txuas ncaj qha amplifier, uas ua rau nws nyuaj kom txo qis nws qhov tsis zoo. Cov yam ntxwv ntawm lub xeev kev ua haujlwm ntawm lub suab nrov hloov pauv raws li lub zog hluav taws xob sib txawv, thiab qhov tsis sib xws ntawm cov khoom siv hluav taws xob hloov pauv nrog lub sijhawm ua haujlwm thiab qhov kub thiab txias. Cov zis, los yog xoom taw tes drift, nws txawv thaum lub tswv yim yog xoom.Nrhiav qhov teeb meem yog ib qho tseem ceeb ib zaug ntxiv. Cov teeb meem pH electrode yuav pom tseeb dua. Piv txwv li, electrode scaling yuav ua rau muaj qhov tsis sib xws hauv qhov tsis kam ntawm cov electrodes thiab tsim drift. Electromagnetic cuam tshuam uas kav ntev yuav muaj teeb meem. Cov electrodes 'zoo tib yam polarization kuj yuav muaj kev cuam tshuam. 1. Ntau lub tswv yim los txo qhov cuam tshuam ntawm xoom drift muaj xws li: Siv lub zog hluav taws xob uas tswj hwm, thiab AC amplifier circuit. Dynamic input impedance yog thib peb. Kev ruaj ntseg thiab xoom drift tov rau chav kuaj thiab muaj pH ntsuas.
1. Siv lub voj voog nrog cov lus tsis zoo. Lub pH meter amplifiers txhua tus siv cov kev tawm tswv yim tsis zoo rau qis qis qis thiab txhim khu kev ruaj ntseg. Kev ruaj ntseg ntawm lub ntsuas hluav taws xob tuaj yeem txhim kho los ntawm kev siv DC cov lus pom tsis zoo ntxiv rau kev ua tiav cov tswv yim impedance ntawm lub ntsuas hluav taws xob. Cov kev hloov pauv ntawm cov khoom siv hluav taws xob tsis muaj kev cuam tshuam rau qhov ntsuas qhov rhiab heev lossis ntau yam.
2. Xaiv thiab saib xyuas pH electrode. Cov khoom siv hluav taws xob sib xyaw rau pH ntsuas yog qhov tseem ceeb rau kev lees paub qhov ntsuas ntsuas qhov tseeb. Txhawm rau kom muaj kev ruaj ntseg, cov electrodes zoo heev yuav tsum tau xaiv uas tuaj yeem tiv taus qhov cuam tshuam ntawm ntau hom tshuaj, qhov kub thiab txias, kev co, thiab lwm yam. Tom qab kev ntsuam xyuas hauv cov qauv, nws yuav tsum tau ntxuav ob peb zaug kom tshem tawm cov kua dej uas seem ntawm cov electrode. Qhov no yog qhov tsim nyog los tiv thaiv cov electrode lub teeb qhov muag teev los ntawm kev txo qis rhiab heev thiab thaum kawg ua rau kev ntsuas tsis ua haujlwm.
