Yuav ua li cas calibrate lub ph ntsuas, ph ntsuas calibration kauj ruam
Ib qho taw tes calibration ntawm pH meter
Txhua hom acidity meter tsuas tuaj yeem ntsuas pH tus nqi ntawm tus qauv tom qab raug ntsuas nrog pH tus qauv daws teeb meem. Rau cov qauv uas nws ntsuas qhov tseeb yog hauv qab no {{0}}.1 pH, qhov ntsuas tuaj yeem hloov kho los ntawm qhov tseeb me ntsis, thiab tus qauv tsis haum ntawm pH 6.86 lossis pH 7.{{ 5}} feem ntau xaiv. Qhov tseeb ntawm qee cov twj paj nruag tsuas yog 0.2pH lossis 0.lpH, yog li lub ntsuas hluav taws xob tsuas yog nruab nrog lub qhov rooj hloov qhov chaw.
Cov kauj ruam ua haujlwm tshwj xeeb yog raws li hauv qab no:
1. Ntsuas tus qauv tsis kub, xyuas lub rooj los txiav txim seb tus nqi pHs ntawm qhov kub thiab txias, thiab kho qhov kub thiab txias qhov kub ntawm qhov kub no.
2. Yaug cov electrode nrog dej ntshiab thiab co kom qhuav.
3. Muab cov electrode tso rau hauv cov tshuaj tsis haum, co nws, thiab cia nws sawv. Tom qab kev nyeem ntawv ruaj khov, kho lub qhov rooj qhov rooj kom lub ntsuas ntsuas pH tus nqi ntawm cov qauv kev daws teeb meem.
4. Tshem tawm cov electrode, ntxuav thiab qhuav nws.
5. Ntsuas qhov ntsuas kub ntawm cov qauv, thiab kho qhov kub thiab txias ntawm qhov ntsuas pH rau qhov ntsuas kub.
Ob-point calibration ntawm pH meter
Rau precision acidity meters, ntxiv rau qhov chaw thiab qhov kub thiab txias kev hloov kho, kuj tseem muaj cov kev hloov kho electrode, yog li ob txoj kev daws teeb meem yuav tsum tau siv rau calibration. Feem ntau, qhov chaw (calibration) yog ua nyob rau ntawm pH6.86 los yog pH7.00 ua ntej, thiab tom qab ntawd raws li cov kua qaub-base mob ntawm cov tshuaj ntsuam xyuas, xaiv pH4.00 (acidic ) los yog pH9.18 thiab pHI0 0l (alkaline) tsis rau kev kho txoj kab nqes. Cov kauj ruam ua haujlwm tshwj xeeb yog raws li hauv qab no:
1. Ntxuav thiab qhuav cov electrode, muab tso rau hauv cov txheej txheem kev daws teeb meem ntawm pH6.86 lossis pH7.00, thiab teeb tsa qhov kub thiab txias ntawm qhov ntsuas qhov ntsuas kub ntawm cov tshuaj. Tom qab tus nqi qhia tau ruaj khov, kho qhov chaw qhov rooj kom qhov ntsuas qhov ntsuas yog pHs tus nqi ntawm cov qauv kev daws teeb meem.
2. Tshem tawm cov electrode, ntxuav nws, tig nws qhuav, thiab muab tso rau hauv cov txheej txheem thib ob. Tom qab tus nqi qhia tau ruaj khov, kho txoj kab nqes pob qhov ntsuas ntawm qhov ntsuas kom tus nqi qhia ntawm qhov ntsuas yog pHs tus nqi ntawm cov txheej txheem thib ob.
3. Tshem tawm cov electrode, ntxuav nws, tig nws kom qhuav, thiab tom qab ntawd muab tso rau hauv cov tshuaj tsis haum pH6.86 lossis pH7.00. Yog tias qhov ua yuam kev dhau 0.02pH, rov ua cov kauj ruam (1) thiab (2) kom txog thaum nws tuaj yeem tso tawm hauv ob qho tib si txheem daws teeb meem pH tsis kho cov pob qhov rooj.
4. Tshem tawm cov electrode thiab tig nws qhuav, kho pH kub them pob qhov rooj rau qhov ntsuas kub ntawm cov qauv tshuaj, raus cov electrode hauv cov qauv tshuaj, co nws, cia nws sawv ntsug, thiab tso saib kev nyeem ntawv ruaj khov.
Qhov thib peb point calibration ntawm pH meter
Tsis muaj teeb meem dab tsi ntawm acidity meter nws yog, tus taw tes ntawm pH {{0}} yuav tsum tau calibrated, thiab lub point ntawm pH=7 yuav tsum tau calibrated ua ntej, thiab ces ob-point calibration yuav tsum tau. ua. Thaum ua calibration, pib los ntawm 7.0, cov txheej txheem xaiv cov tshuaj muaj feem xyuam rau pH tus nqi ntawm cov tshuaj yuav tsum tau kuaj, kom pH tus nqi ntawm cov tshuaj yuav poob nyob rau hauv lub calibrated pH ntau yam. Feem ntau, ob lub ntsiab lus tuaj yeem ua tau raws li qhov yuav tsum tau ua. Yog tias qhov yuav tsum tau muaj siab, lub ntsiab lus thib peb yuav raug txiav txim siab. Qee cov twj paj nruag tuaj yeem ntsuas peb lub ntsiab lus, thiab muaj cov kev xaiv xaiv uas tuaj yeem siv ncaj qha. Ib txhia tsis ua. Feem ntau, ob-point proofreading yog siv, uas yog, proofreading ob zaug.
