Peb-point calibration txheej txheem rau calibrating pH meters
1. Hloov cov txheej txheem kev daws teeb meem nrog pH qhov tseem ceeb ntawm 4.01, 7.00, thiab 10.01 mus rau hauv 50mL me beakers huv si thiab qhuav.
2. Nias lub hwj huam khawm kom qhib lub pH meter, yaug lub electrode thiab qhuav nws nrog cov ntawv tsis muaj plua plav, ces muab tso rau hauv cov txheej txheem buffer tov nrog pH ntawm 4.01. Nias lub "calibrate" tus yuam sij rau CAL.1 interface, tos rau kev nyeem ntawv kom ruaj khov thiab tus cursor nyob rau hauv pem hauv ntej ntawm kev nyeem ntawv yog flashing, nias lub "digital edit" tus yuam sij los kho pH meter nyeem ntawv rau pH tus nqi txheem daws. Tom qab ntawd nias lub "calibrate" yuam sij nkag mus rau CAL.2 interface.
3. Yaug cov electrode thiab qhuav nws nrog cov ntawv tsis muaj plua plav, ces muab tso rau hauv cov txheej txheem buffer tov nrog pH ntawm 7. flashing, nias lub pob "Number Edit" los kho cov pH meter nyeem ntawv rau cov qauv kev daws teeb meem. pH. Tom qab ntawd nias lub "calibrate" yuam sij nkag mus rau CAL.3 interface.
4. Yaug cov electrode thiab qhuav nrog cov ntawv tsis muaj plua plav, tom qab ntawd muab tso rau hauv cov txheej txheem buffer tov nrog pH ntawm 10.01, tos kom qhov kev nyeem ntawv ruaj khov thiab tus cursor nyob rau hauv pem hauv ntej ntawm kev nyeem ntawv yog flashing, nias lub "Number Kho kom raug" khawm los kho pH meter nyeem ntawv rau cov qauv kev daws teeb meem. pH.
5. Nias tus yuam sij "txuag / luam tawm" kom txuag tau qhov txiaj ntsig calibration, thiab tau txais txoj kab nqes ntawm txoj kab ncaj nraim tom qab peb-point calibration. Yog hais tias txoj kab nqes ntawm txoj kab ncaj nraim nyob rau hauv thaj tsam ntawm 100 ± 3, thiab ntsuas pH qhov tseem ceeb ntawm lwm qhov kev daws teeb meem tsis zoo nyob hauv thaj tsam ntawm ± 0.3, qhov ntsuas tau siv tau. Tsis tas li ntawd yuav tsum recalibration.
6. Tom qab siv cov txheej txheem buffer tov, muab nws nrog ib tug parafilm thiab muab cia rau hauv qhov chaw qhuav rau ntau yam kev siv.
Thaum ntsuas pH tus nqi ntawm cov tshuaj nyob rau hauv ib qho me me (xws li 3-8), tsuas yog ob txoj kev daws teeb meem tsis zoo nrog pH 4.01 thiab 7.00 tuaj yeem siv rau calibration.
Tom qab calibration tiav, yog siv pH meter nquag, nws yuav tsum tau calibrated txhua 2 hnub. Lub pH meter yuav tsum tau recalibrated yog:
(1) Cov electrode raug rau huab cua ntev heev, xws li ntau tshaj li ib nrab teev.
(2) Tom qab ntsuas cov tshuaj peracid (pH <2) lossis perbasic (pH> 12).
(3) Tom qab hloov cov electrodes.
