Txhim kho cov tshuaj tiv thaiv cov pa oxygen
Lub tshuab ua kua oxygen yaj yog ib qho cuab yeej siv los ntsuas cov pa oxygen molecular yaj hauv dej los yog kua theem. Dav siv nyob rau hauv kev saib xyuas ib puag ncig, aquaculture, dej phwj kho thiab lwm yam haujlwm.
Dissolved oxygen analyzer niaj hnub tu thiab ntsuas ntsuas ntsuas
Kev saib xyuas txhua hnub ntawm lub 'meter' feem ntau suav nrog kev tu, calibration thiab rov tsim dua tshiab ntawm cov electrode.
(1) Cov electrode yuav tsum tau ntxuav txhua 1 mus rau 2 lub lis piam. Yog tias muaj kab mob ntawm lub diaphragm, nws yuav ua rau kev ntsuas yuam kev.
Ceev faj tsis txhob ua kom lub diaphragm puas thaum ntxuav. Yaug cov electrode nrog dej huv. Yog tias cov av tsis tuaj yeem ntxuav tau, txhuam kom zoo nrog cov ntaub mos muag lossis paj rwb.
(2) Zero thiab ncua yuav tsum tau recalibrated txhua 2 ~ 3 lub hlis.
(3) Kev tsim dua tshiab ntawm cov electrode yog nqa tawm kwv yees li ib xyoos ib zaug. Thaum ntsuas qhov ntsuas tsis tuaj yeem hloov kho, cov pa oxygen electrode yuav tsum tau rov tsim dua.
Electrode regeneration muaj xws li hloov cov electrolyte sab hauv, hloov lub diaphragm, thiab ntxuav cov nyiaj electrode. Yog tias oxidation ntawm cov nyiaj electrode tau pom, xuab zeb nws nrog cov ntawv xuab zeb zoo.
(4) Yog tias cov electrode xau thaum siv, cov electrolyte yuav tsum tau hloov.
Dissolved Oxygen Analyzer Instrument Calibration
Cov txheej txheem calibration ntawm qhov ntsuas feem ntau tuaj yeem ntsuas nrog cov qauv kev daws teeb meem lossis kev ntsuas ntawm qhov chaw.
(1) Standard solution calibration method:
Txuj kev daws teeb meem calibration feem ntau siv ob-point calibration, uas yog xoom-point calibration thiab ncua calibration. Cov tshuaj zeroing tuaj yeem siv 2 feem pua Na2SO3 tov.
Cov tshuaj calibration ntau tuaj yeem yog 4M KCl tov (2mg / L); 50 feem pua ntawm cov tshuaj methanol (21.9mg / L), xam raws li ntsuas qhov ntsuas.
(2) Txoj kev ntsuas qhov ntsuas ntawm qhov chaw (Winkler method):
Nyob rau hauv kev siv tswv yim, nyob rau ntawm qhov chaw calibration ntawm yaj oxygen analyzer feem ntau yog siv. Muaj ob qhov xwm txheej thaum siv txoj kev no:
Thaum ua piv txwv, lub ntsuas ntsuas yog M1, thiab qhov ntsuas tus nqi yog A. Thaum ntsuas lub ntsuas ntsuas, lub ntsuas ntsuas tseem nyeem M1. Lub sijhawm no, tsuas yog kho qhov ntsuas ntsuas kom sib npaug ntawm A; Qhov kev nyeem ntawv yog M1, qhov ntsuas ntsuas tus nqi yog A, thiab thaum ntsuas ntsuas ntsuas, ntsuas ntsuas ntsuas M2. Lub sijhawm no, kev nyeem ntawv ntawm qhov ntsuas ntsuas tsis tuaj yeem sib npaug rau A, tab sis kev nyeem ntawv ntawm lub ntsuas yuav tsum tau hloov kho.
