Kev tu thiab tu ntawm Dissolved Oxygen Meter
Ib lub ntsuas oxygen yaj ntsuas ntsuas cov pa oxygen yaj hauv cov kua dej aqueous. Cov pa oxygen yog yaj hauv dej los ntawm cov huab cua nyob ib puag ncig, huab cua txav thiab photosynthesis.
Nws tuaj yeem siv los ntsuas thiab saib xyuas cov txheej txheem uas cov pa oxygen tuaj yeem cuam tshuam rau cov tshuaj tiv thaiv, kev ua haujlwm zoo lossis ib puag ncig: xws li aquaculture, biological reactions, environmental testing (pas, kwj, dej hiav txwv), dej / dej khib nyiab, kev tsim cawv.
Cov teeb meem xav tau kev saib xyuas txhua hnub thiab kev saib xyuas ntawm lub ntsuas pa oxygen yaj:
1. Calibrate ib hnub ib zaug ua ntej siv lub ntsuas oxygen yaj, siv cov dej-saturated gas txoj kev, thiab tsis tas yuav calibrate dua txawm tias lub tshuab raug kaw hauv ib hnub;
2. Qhov kub thiab txias qhov sib txawv ntawm calibration thiab ntsuas yuav tsum tsis txhob loj heev, nyiam dua tsis ntau tshaj ntxiv rau -5 degree ;
3. Yog tias qhov kev nyeem ntawv tsis zoo, koj yuav tsum hloov cov membrane ntawm cov pa oxygen meter (xws li kev nyeem ntawv tsis ruaj khov tom qab pib los yog tsis zoo li yuav ruaj khov ntawm qhov siab mus rau qis);
4. Thaum hloov daim nyias nyias ntawm lub ntsuas cov pa oxygen, yuav tsum tsis txhob muaj cua npuas hauv electrolyte, daim nyias nyias yuav tsum tsis txhob wrinkled, thiab cov membrane ntau dhau yuav tsum raug txiav tawm;
5. Lub yaj oxygen membrane yuav tsum tau hloov thaum lub electrolyte ntawm lub sensor ntawm yaj oxygen meter yog qhuav;
6. Thaum hloov cov pa oxygen membrane, ntxuav cov qub electrolyte nrog dej deionized los yog dej distilled, thiab poob rau hauv 2-3 tee ntawm electrolyte tshiab kom qhuav. Qhov zoo tib yam yaj oxygen sensor yuav tsum tau dripped nrog cov electrolyte tshiab kom txog rau thaum cov kua nto bulges, thiab yaj cov pa zaj duab xis yuav tsum tau nias yam tsis muaj cua npuas; lub npog zaj duab xis yuav tsum tau ntim nrog ib nrab ntawm cov electrolyte tshiab thiab screwed nruj nreem;
7. Cov ntaub npog npog tuaj yeem siv tau tom qab hloov pauv, thiab cov ntaub ntawv zoo tib yam yuav tsum tau muab tso rau ib hmos tom qab hloov pauv kom tso cai rau cov membrane kom rov qab tau nws qhov nyiaj tshuav;
8. Qhov saum npoo ntawm cov pa oxygen yaj yuav tsum tau muab ntxuav kom zoo yog tias nws muaj kab mob, thiab daim nyias nyias yuav tsum tsis txhob puas lawm;
9. Thaum ntsuas cov pa oxygen yaj, yog tias muaj cov npuas tsis tu ncua nyob rau hauv qab, lub taub hau sensor yuav tsum tig mus thiab khi rau hauv lub cable, kom cov npuas tsis tuaj yeem nyob ntawm qhov chaw ntawm cov pa yaj yeeb yaj kiab;
10. Ordinary dissolved oxygen sensors yuav tsum tau nplawm thaum ntsuas, thiab kev nplawm kom zoo yog qhov tsim nyog kom tau txais kev nyeem cov pa oxygen tiag tiag. Txoj kev ceev mem tes thiab microelectrode array (MEA) ntsuas yam tsis tau nplawm;
Calibration method of water-saturated gas method: siv "feem pua" txoj kev rau calibration, tshwj tsis yog tias muaj cov kev cai tshwj xeeb, tsis txhob siv "mg / l" txoj kev; tso lub sensor rau hauv cov dej noo hauv lub raj mis, tsis txhob sib cuag nrog dej ncaj qha, thiab tsis txhob kov lub raj mis nrog cov cua. Muab cais nyob ib leeg; tso nws rau ntau tshaj 15 feeb, cia cov dej vapor saturate, zoo li sib npaug, los yog cov pa oxygen yaj thiab ntsuas kub tau ruaj khov; nkag mus rau qhov tseeb atmospheric siab tus nqi (hauv mmHg kem); qhov sib txawv ntawm qhov ruaj khov calibration thiab ntsuas qhov ntsuas kub tsis ntau tshaj qhov ntxiv -5 degree ; paub meej tias tus nqi calibration.
