Cov nyiaj them nyiaj xaim yog ib khub ntawm cov xov hlau uas muaj cov txheej txheem insulating uas muaj tus nqi nominal tib yam li cov thermoelectromotive quab yuam ntawm cov thermocouple sib tw hauv qhov kub thiab txias (0 ~ 100 ° C). Qhov yuam kev vim qhov kub hloov pauv ntawm qhov sib txuas. Cov nram qab no editor yuav qhia rau koj seb cov khoom siv ntawm cov thermocouple them nyiaj yog dab tsi, qhov kev ua haujlwm ntawm cov thermocouple them nyiaj yog dab tsi, thiab kev faib tawm ntawm cov thermocouple them nyiaj hlau.
1. Cov khoom siv dab tsi yog lub thermocouple them nyiaj hlau?
Cov nyiaj them nyiaj dav dav yuav tsum muaj qhov zoo thiab tsis zoo electrodes kom zoo ib yam li cov khoom zoo thiab tsis zoo ntawm cov thermocouple. K-hom thermocouples yog npib tsib xee-cadmium (zoo) thiab npib tsib xee-silicon (tsis zoo), yog li raws li tus qauv, cov nickel-cadmium-nickel-silicon them nyiaj yuav tsum raug xaiv.
2. Dab tsi yog qhov ua haujlwm ntawm cov thermocouple them nyiaj hlau
Nws yog txhawm rau txuas cov hluav taws xob kub, uas yog, qhov kawg txias ntawm lub thermocouple mobile, thiab txuas nrog cov khoom ntsuas los tsim qhov ntsuas kub. Sib npaug txais yuav lub teb chaws tus qauv ntawm IEC 584-3 "Thermocouple Part 3 - Nyiaj Txiag Hlau". Cov khoom lag luam yog siv ntau yam ntsuas kub ntsuas, thiab tau siv dav hauv nuclear fais fab, roj av, tshuaj, metallurgy, hluav taws xob thiab lwm yam haujlwm.
3. Kev faib tawm ntawm cov thermocouple them nyiaj hlau
Hauv txoj cai, nws tau muab faib ua hom txuas ntxiv thiab hom kev them nyiaj. Cov tshuaj nominal muaj pes tsawg leeg ntawm cov hlau alloy ntawm hom txuas ntxiv yog tib yam li cov thermocouple sib txuam, yog li cov thermoelectric tej zaum kuj zoo ib yam. Nws yog sawv cev los ntawm "X" nyob rau hauv tus qauv, thiab cov nominal tshuaj muaj pes tsawg leeg ntawm cov hlau alloy ntawm cov nyiaj them yog tib yam. Nws txawv ntawm qhov sib txuam thermocouple, tab sis nyob rau hauv nws qhov chaw ua haujlwm kub, lub peev xwm thermoelectric nyob ze rau tus nqi ntawm cov thermoelectric peev xwm ntawm qhov sib tw thermocouple, uas yog sawv cev los ntawm "C" hauv cov qauv.
Kev them nyiaj raug muab faib ua qib zoo tib yam thiab qib precision. Qhov kev ua yuam kev tom qab them nyiaj ntawm qib precision yog feem ntau tsuas yog ib nrab ntawm cov qib zoo tib yam, uas feem ntau yog siv rau hauv qhov chaw uas muaj qhov ntsuas qhov tseeb. Piv txwv li, rau cov nyiaj them ntawm cov xov tooj ntawm S thiab R kawm tiav, qhov kam rau siab ntawm qib precision yog ± 2.5 ° C, thiab qhov kam rau ntawm qib zoo tib yam yog ± 5.0 ° C; rau cov nyiaj them ntawm cov xov tooj ntawm K thiab N kawm tiav, kev kam rau siab ntawm qib precision yog ± 1.5 ° C, kev kam rau siab ntawm qib zoo tib yam yog ± 2.5 ℃. Hauv cov qauv, qib zoo tib yam tsis raug cim, thiab qib precision ntxiv nrog "S".
Los ntawm kev ua haujlwm kub, nws tau muab faib ua kev siv dav dav thiab kev siv cua sov. Kev ua haujlwm kub ntawm kev siv dav dav yog 0 ~ 100 ° C (ob peb yog 0 ~ 70 ° C);
Tsis tas li ntawd, cov tub ntxhais hlau tuaj yeem muab faib ua ib leeg-strand thiab multi-core (mos xaim) cov nyiaj them poob haujlwm, thiab tuaj yeem muab faib ua cov kab hluav taws xob zoo tib yam thiab tiv thaiv kev them nyiaj raws li seb lawv puas muaj cov txheej thaiv thaiv, thiab tseem muaj cov nyiaj them rau cov xov hlau. intrinsically muaj kev nyab xeeb circuits nplooj siab rau lub sij hawm tawg-pov thawj.