Dab tsi yog qhov ntsuas kub ntsuas ntawm hom T thermocouple
Tso lus
Hom T thermocouple feem ntau tuaj yeem ntsuas kub ntawm -200 txog +350 degrees Celsius. Nws yog qhov tseeb tshaj plaws thiab ruaj khov ntawm qhov kub thiab txias ntawm txhua lub hauv paus hlau thermocouples, uas ua rau nws zoo heev rau kev ntsuas kub kom raug hauv qhov chaw txias. Hauv thaj tsam qis - qhov kub thiab txias ntawm -200℃rau 0 degree, nws qhov ruaj khov txhua xyoo tuaj yeem tsawg dua ± 3μV. Nws tuaj yeem siv tau los ua tus qauv thib ob rau kev hloov pauv qhov ntsuas kub qis. Nws yog siv ntau hauv kev tshawb fawb tshawb fawb, tshuaj, tshuab tub yees, thiab kev lag luam qis-kub txheej txheem tswj.
I. Tso cai txhais ntawm qhov ntsuas qhov ntsuas kub thiab siv nws li cas
Lub International Electrotechnical Commission (IEC) thiab Suav cov kev cai hauv tebchaws tau hais tias hom T thermocouple (tooj liab-constantan) tuaj yeem saib xyuas qhov kub ntawm -200 txog +350 degrees Celsius. Tab sis nyob rau hauv lub neej tiag tiag, muaj qhov sib txawv ntawm luv-lub sij hawm thiab mus sij hawm ntev siv:
Qhov ntsuas kub rau qhov ntev - siv lub sijhawm yog nyob nruab nrab ntawm 300 thiab 350 degrees Celsius. Vim tias cov tooj liab ntshiab tsis tiv taus oxidation, lub sij hawm ntev ua haujlwm kub hauv qhov chaw oxidizing yuav tsum tsis txhob siab tshaj 350 degree. Yog tias nws ua li ntawd, tooj liab yuav oxidize yooj yim, uas yuav ua rau cov thermoelectric kev ua tau zoo mus. Qee cov ntaub ntawv hais tias kom nws ruaj khov, nws yuav tsum tsuas yog siv rau hauv huab cua ntawm qhov kub siab tshaj 300 degree.
Qhov kub thiab txias tuaj yeem zam tau rau lub sijhawm luv luv: txog 400℃Hom T thermocouples tuaj yeem tswj qhov kub txog li 400℃rau lub sijhawm luv luv, suav nrog lub sijhawm ua haujlwm lossis ntsuas kub ceev. Txawm li cas los xij, lawv yuav tsum tsuas yog siv rau 30 feeb ntawm ib lub sijhawm kom tsis txhob muaj kev laus los yog tawg.
Tsawg-kub siv tau: Kev ntsuas ruaj khov mus rau -200℃Hom T thermocouples yog ib qho ntawm ob peb lub tshuab thermocouples uas tuaj yeem ntsuas qhov ntsuas kub ntawm cov kua nitrogen (-196 degree), thiab feem ntau yog siv rau hauv ultra-low kub cia txias, kua nitrogen cia tank, cov khoom siv tub yees, thiab lwm yam kev siv zoo sib xws.
Lus Cim: Hom T thermocouples tsis tuaj yeem siv rau hauv sulfidation ntawm qhov kub thiab txias los yog hauv cov huab cua tsis zoo. Tsis tas li ntawd, vim tooj liab muaj cov thermal conductivity siab, qhov kub poob tuaj yeem tshwm sim thaum qis - ntsuas kub, uas tuaj yeem cuam tshuam qhov tseeb ntawm kev soj ntsuam.
II. Cov txiaj ntsig ntawm cov khoom siv thiab kev ua haujlwm zoo
Muaj ob lub hlau hauv T-hom thermocouple:
TP yog ib qho zoo electrode uas yog 99.95% ntshiab tooj liab.
Tsis zoo electrode (TN): tooj liab-nickel alloy (constantan), uas yog ua los ntawm li 55% tooj liab thiab 45% npib tsib xee.
Nws cov txiaj ntsig tseem ceeb yog:
High rhiab heev thiab linearity: Lub thermoelectric tej zaum tus nqi yog siab, lub teeb liab tso zis yog muaj zog, thiab qhov kub thiab txias teb yog yuav luag linear, uas ua rau nws yooj yim rau kev soj ntsuam thiab calibrate cov cim.
Kev tsim khoom zoo: yooj yim los ntxuav cov khoom, kev tsim khoom zoo ib yam, thiab zoo rau kev tsim khoom loj
Tsawg nqi: Nws raug nqi tsawg dua thiab tus nqi ntau dua -zoo dua li cov thermocouples uas muaj nuj nqis (xws li S thiab B hom).
Kev ua tau zoo ntawm qhov kub tsis tshua muaj: ruaj khov ntawm -200 thiab 0 degree, ua rau nws zoo heev rau kev nyeem qhov ntsuas kub tsawg.
III. Common Use Cases and recommendations for xaiv
T- hom thermocouples yog siv ntau txoj hauv kev... Siv ntau yam hauv qab no:
Kev lag luam cryogenic suav nrog kev cia txias, tub yees, kua nitrogen tso tsheb hlau luam, thiab ntsuas qhov kub ntawm cov dej khov qhuav.
Cov Khoom Siv Kho Mob: Cov tub yees rau cov tshuaj tiv thaiv, cov khoom siv khaws cia cov qauv tshuaj lom neeg, thiab cov khoom siv cryotherapy
Tsawg-kub physics thiab qis- ntsuas kub ntawm cov ntaub ntawv yog cov piv txwv ntawm kev tshawb fawb tshawb fawb.
Khoom noj khoom haus Cold Chain: Ua raws li qhov ntsuas kub ntawm kev thauj mus los khov thiab tso rau hauv tub yees
Thaum xaiv tus qauv, nco ntsoov cov hauv qab no:
Armored Structure: T- hom armored thermocouples tuaj yeem ua haujlwm nyob rau hauv qhov chaw ntub thiab vibrating thiab muaj qhov kub ntawm -200 txog 300℃.
Qhov kev khiav hauj lwm kub hloov nrog qhov kev sojntsuam txoj kab uas hla. Qhov zoo dua lub thermocouple, qhov kub ntawm kev khiav hauj lwm qis dua. Ib txoj kab uas hla ntawm 0.2-0.3 hli tuaj yeem ua haujlwm ntawm 150℃ntev.
Nws yog qhov zoo tshaj plaws los siv 316 stainless hlau los yog Teflon txheej rau cov khoom siv tiv thaiv. Qhov no yuav ua rau nws tiv taus siab, dej, thiab roj.
