Dab tsi yog qhov tsis to taub hauv kev siv ph meter
Qhov thib ob, tsis siv neeg them nyiaj ua haujlwm ntawm ph meter
Hauv kev ntsuas ph ntsuas, tib neeg feem ntau xav tias txij li lub ntsuas ph meter nrog qhov ntsuas kub thiab qhov ntsuas kub tau siv, txawm tias qhov ntsuas kub hloov pauv li cas, tus nqi ph ntsuas los ntawm ph ntsuas yuav tsum yog tus nqi ph ntawm tus qauv ntsuas kub (25 degree). Qhov tseeb, ph meter ib txwm ntsuas tus nqi ph ntawm qhov ntsuas kub tam sim no. Lub pH ntsuas nrog qhov kub thiab txias muaj nuj nqi kho qhov nqes hav ntawm cov electrode muaj peev xwm nrog tus nqi pH raws li qhov ntsuas kub, kom nws tuaj yeem ntsuas qhov tseeb.
3. Calibration ntawm ph meter
Ntau tus neeg xav tias qhov ntsuas ntsuas ntsuas yuav tsum tau nqa tawm hauv qhov ntsuas tag nrho, thiab yog li yuav tsum tau ntsuas ph meter. Qhov tseeb, nws yog qhov tsis muaj tseeb rau cov electrode ntawm pH meter kom tau txais qhov tseeb tib yam hauv qhov ntsuas tag nrho hauv kev siv. Lub calibration ntawm pH meter feem ntau siv ob-point calibration. Ib qho taw tes yog cov txheej txheem tsis nyob ib puag ncig ph7 los tso rau pH meter; Lwm qhov taw qhia yog siv cov txheej txheem tsis haum nyob ib puag ncig ph4 lossis ph9 rau kev ntsuas raws li kev siv ib puag ncig (acidic lossis alkaline).
Tsis tas li ntawd, kev saib xyuas tshwj xeeb yuav tsum tau them rau qhov kub ntawm cov tshuaj yuav tsum tau kuaj ua ntej calibration. Txhawm rau kom raug xaiv cov txheej txheem tsis siv tshuaj, thiab kho qhov kub thiab txias ntawm cov khoom siv hluav taws xob ntawm lub vaj huam sib luag electrometer kom nws ua tau raws li qhov ntsuas kub ntawm cov tshuaj yuav tsum tau kuaj.
Tom qab kev ua haujlwm calibration tiav lawm, cov pH meter nquag siv feem ntau tsis tas yuav rov ntsuas dua hauv 48 teev. Nyob rau hauv rooj plaub ntawm ib qho ntawm cov xwm txheej hauv qab no, qhov ntsuas yuav tsum rov ntsuas dua:
1. Thaum muaj qhov sib txawv loj ntawm qhov ntsuas kub thiab qhov ntsuas kub ntsuas;
2. Thaum cov electrode raug huab cua ntev dhau lawm;
3. Qhov chaw los yog txoj kab nqes regulator yog misoperated;
4. Tom qab ntsuas cov tshuaj peracid (ph<2) or="" overalkaline="" (ph="">12);
5. Tom qab hloov cov electrodes;
6. Thaum tus nqi pH ntawm cov ntsuas ntsuas tsis nyob hauv nruab nrab ntawm cov tshuaj uas tau xaiv thaum lub sij hawm ntsuas ob lub ntsiab lus, thiab nws nyob deb ntawm 7ph.
4. Qhov tseeb theem ntawm ph meter thiab nws qhov kev tso cai yuam kev
Qee tus neeg xav tias nyob rau hauv cov twj paj nruag, qhov tseeb ntawm qhov ntsuas tau qhia los ntawm kev siv yuam kev, thiab qhov tseeb ntawm ph meter kuj zoo ib yam. Qhov tseeb, qhov no yog kev nkag siab yuam kev. Qib ph meter thiab qhov tseeb ntawm qhov ntsuas yog ob lub ntsiab lus sib txawv. Nws qib yog nyob ntawm tus qhab nia (kev daws teeb meem lossis qhov tsawg kawg nkaus tso saib tus nqi) ntawm nws qhov taw qhia (lub ntsuas hluav taws xob luv luv). Qhia, thiab qhov tseeb ntawm qhov ntsuas yog qhov ua yuam kev ntawm lub tshuab hluav taws xob thiab cov khoom siv hluav taws xob sib piv cov qauv ntsuas kev daws teeb meem, uas tsis yog tsuas yog cuam tshuam nrog lub tshuab hluav taws xob, tab sis kuj muaj feem cuam tshuam nrog cov iav electrode thiab siv electrode.
