Qhov "tus lej kawm tiav" hauv cov thermocouples thiab ntsuas ntsuas kub
Cov "tus lej kawm tiav" hauv cov thermocouples thiab ntsuas ntsuas kub feem ntau suav nrog S, R, B, N, K, E, J, T, thiab lwm tus lej kawm tiav. Ntawm lawv, S, R, thiab B belongs rau cov hlau zoo nkauj thermocouples, thaum N, K, E, J, thiab T yog cov khoom siv hluav taws xob pheej yig.
Tus yam ntxwv ntawm tus lej S kawm tiav yog nws cov kev ua haujlwm muaj zog antioxidant, uas yog tsim rau kev siv txuas ntxiv hauv oxidizing thiab inert atmospheres. Lub sijhawm siv sijhawm ntev yog 1400 degree, thiab siv sijhawm luv luv yog 1600 degree. Ntawm tag nrho cov thermocouples, tus lej S kawm tiav muaj qib siab tshaj plaws thiab feem ntau yog siv los ua tus qauv thermocouple;
Piv nrog rau S Performance index, R Performance index yuav luag zoo tib yam, tshwj tsis yog tias lub thermal electromotive quab yuam yog li ntawm 15 feem pua;
Tus lej kawm tiav B muaj qhov me me thermal electromotive quab yuam ntawm chav tsev kub, yog li cov nyiaj them nyiaj feem ntau tsis siv thaum ntsuas. Nws siv sijhawm ntev kub yog 1600 degree thiab siv sijhawm luv luv yog 1800 degree. Nws tuaj yeem siv rau hauv oxidizing lossis nruab nrab cua, lossis siv sijhawm luv luv hauv lub tshuab nqus tsev.
Cov yam ntxwv ntawm tus naj npawb N kawm tiav yog qhov muaj zog kub oxidation tsis kam ntawm 1300 degree, kev ruaj ntseg zoo rau lub sij hawm ntev ntawm thermoelectric electromotive quab yuam thiab rov tsim dua tshiab ntawm lub sij hawm luv luv thermal, zoo tiv thaiv hluav taws xob hluav taws xob thiab qhov kub thiab txias, thiab tuaj yeem hloov tau ib nrab. S kawm tiav tus lej thermocouple;
Tus yam ntxwv ntawm K-scale yog nws muaj zog antioxidant kev ua tau zoo, thiab nws yog haum rau kev siv tas li nyob rau hauv oxidizing thiab inert cua. Kev siv lub sijhawm ntev kub yog 1000 degree, thiab siv sijhawm luv luv yog 1200 degree. Dav siv nyob rau hauv tag nrho cov thermocouples;
Tus yam ntxwv ntawm tus lej E kawm tiav yog qhov uas feem ntau siv cov thermocouples, nws cov thermoelectric electromotive quab yuam yog siab tshaj, uas txhais tau hais tias nws muaj qhov siab tshaj plaws. Nws yuav tsum tau siv tas li nyob rau hauv ib qho oxidizing thiab inert cua ntawm qhov kub ntawm 0-800 degree ;
Tus yam ntxwv ntawm J kawm tiav tus lej yog tias nws tuaj yeem siv tau rau hauv ob qho tib si oxidizing cua (nrog rau qhov ntsuas kub siab tshaj ntawm 750 degree) thiab txo cov huab cua (nrog rau qhov kub siab tshaj ntawm 950 degree), thiab tiv taus H2 thiab CO roj corrosion. Nws feem ntau yog siv rau hauv cov roj refining thiab tshuaj lom neeg kev lag luam;
Tus yam ntxwv ntawm T-scale yog tias nws muaj qhov raug siab tshaj plaws ntawm txhua qhov pheej yig hlau thermocouples thiab feem ntau yog siv los ntsuas kub hauv qab 300 degree.
