Yuav ua li cas kom ntseeg tau tias kev ua haujlwm ntev ntawm Thermocouples?

Qhov tseem ceeb ntawm kev ntsuas qhov ntsuas kub, cov thermocouples yuav tsum muaj kev ntseeg siab ntev ua haujlwm rau ntau yam kev lag luam, kev tshawb fawb tshawb fawb, thiab lwm yam kev siv. Cov khoom siv no khiav ntawm Seebeck nyhuv, uas cov lus teb rau qhov kub thiab txias gradient generates ib qhov hluav taws xob ntawm qhov sib txuas ntawm ob lub hlau sib txawv. Lawv lub peev xwm los muab cov ntaub ntawv kub muaj txiaj ntsig los ntawm lub tswv yim tseem ceeb no tsis tau zoo.
Ua ntej tshaj plaws, kev xaiv tsim nyog ntawm hom thermocouple yog qhov yooj yim kiag li. Ntau cov qauv thermocouple yog tsim rau qee qhov kub thiab txias, ib puag ncig ib puag ncig, thiab qib ntawm qhov tseeb. Rau qhov dav dav - lub hom phiaj ntsuas kub ntawm qhov ntsuas kub ntau, piv txwv li, hom K thermocouples feem ntau ua haujlwm; Hom B thermocouples yog qhov zoo dua rau kev siv kub heev. Ib lub thermocouple siv dhau qhov nws xav tau qhov kub thiab txias yuav maj mam poob kev ua haujlwm. Piv txwv li, siv qhov ntsuas kub qis, ntsuas cov thermocouple hauv lub tshuab hluav taws xob muaj cua sov, piv txwv li, tuaj yeem ua rau cov ntaub ntawv sai sai, ua rau kev nyeem ntawv tsis raug thiab txo lub neej.
Lwm qhov tsim nyog zoo yog calibration. Nquag calibration guarantees qhov tseeb ntawm qhov ntsuas kub ntawm lub thermocouple. Thermocouples xav tau calibration kom khaws tau lawv qhov tseeb, ib yam li lub suab paj nruag yuav tsum tau kho kom raug sau ntawv. Calibration yuav tsum tau ua los ntawm cov neeg tsim nyog nyob rau hauv raws li cov txheej txheem siv. Thermocouples yuav tsum tau ntsuas ntau zaus hauv chav kuaj, qhov ntsuas qhov ntsuas kub yog qhov tseem ceeb rau kev ntsuas. Cov xwm txheej muaj xws li kev caij tsheb kauj vab, kev ntxhov siab, thiab tshuaj lom neeg ib puag ncig tuaj yeem ua rau qhov ntsuas ntsuas mus dhau sijhawm. Kev ntsuas ntsuas tsis tu ncua yuav pab nrhiav pom thiab kho qhov tsis sib xws me me thaum ntxov, yog li zam qhov ntsuas qhov ntsuas kub tsis raug.
Kev ua haujlwm ntev ntawm cov thermocouples kuj tseem cuam tshuam los ntawm cov txheej txheem kev teeb tsa. Lawv yuav tsum tau muab tso rau kom lawv lav qhov tsim nyog thermal tiv tauj nrog cov khoom lossis cov khoom hauv qab ntsuas. Txhawm rau tiv thaiv kom tsis txhob raug cuam tshuam los ntawm cov yeeb nkab phab ntsa kub thaum ntsuas qhov kub ntawm cov kua hauv cov yeeb nkab, cov thermocouple yuav tsum muab tso rau ntawm qhov tob kom haum. Yuav tsum tau ua tsis ncaj ncees lawm, hais yog tias huab cua sib txawv ntawm lub thermocouple thiab ntsuas qhov chaw, qhov kev sib kis ntawm tshav kub yuav tsis ua haujlwm thiab kev nyeem ntawv yuam kev yuav ua raws. Tsis tas li ntawd, kev saib xyuas yuav tsum tau them nyiaj los tiv thaiv lub thermocouple los ntawm kev puas tsuaj thaum lub sijhawm teeb tsa. Cov teeb meem kev ua haujlwm ntev thiab hloov cov yam ntxwv hluav taws xob tuaj yeem tshwm sim los ntawm kev khoov lossis cov hlau tawg.
Khaws cov thermocouple tsis pub nyob ib puag ncig yog qhov tseem ceeb heev. Kev siv cov ntaub thaiv npog tsim nyog yog qhov tseem ceeb hauv qhov xav tau ib puag ncig, suav nrog cov chaw tsim tshuaj lom neeg lossis chaw nyob hauv hiav txwv. Cov sheaths no muab kev tiv thaiv kev ya raws, lwm yam uas tuaj yeem cuam tshuam cov thermocouple, thiab corrosive compounds. Piv txwv li, ib lub thermocouple yam tsis muaj kev tiv thaiv tsim nyog yuav corrode sai nyob rau hauv cov tshuaj ua cov nroj tsuag uas muaj zog acids thiab alkalis, yog li ntawd tawm nws tsis muaj nqis. Qhov tshwj xeeb ib puag ncig txiav txim siab xaiv cov khoom siv sheath; yog li, nws yuav tsum tau ua tib zoo xaiv los lav qhov kev ntseeg siab ntawm thermocouple mus ntev.
Kev saib xyuas zoo, kev tshuaj xyuas tsis tu ncua yog qhov tseem ceeb heev. Cov cim ntawm kev hnav yuav tsum tau nrhiav los ntawm cov neeg ua haujlwm hauv kev tiv thaiv sheath qhov pom kev puas tsuaj, cov khoom tsis zoo, thiab xaim fraying. Yog tias muaj teeb meem tshwm sim, cov lus teb tsim nyog yuav tsum tau muab tam sim ntawd. Qee zaum ntxuav lub thermocouple yuav txaus; Hauv qhov xwm txheej hnyav dua yuav tsum tau hloov pauv. Piv txwv li, lub thermocouple tuaj yeem sib sau cov av nyob rau lub sijhawm hauv kev lag luam uas muaj plua plav thiab khib nyiab ntau, yog li cuam tshuam rau nws txoj haujlwm. Kev tu nws tsis tu ncua yuav pab kom tsis txhob muaj teeb meem ntev los ntawm nws.
Ntxiv mus, cov thermocouple cov kev sib txuas hluav taws xob yuav tsum tau tswj xyuas kom zoo thiab ua tau zoo. Kev sib txuas xoob lossis corroded tuaj yeem ua rau muaj kev tiv thaiv lossis hluav taws xob nrov, yog li cuam tshuam qhov ntsuas qhov ntsuas qhov tseeb. Kev sib txuas tsim nyog thiab kev ceev nrawm ntawm lawv pab kom tsis txhob muaj teeb meem no. Txawm tias ib qho kev sib txuas tsis zoo hauv kev lag luam nyuaj nrog ntau lub thermocouples tuaj yeem muab cov ntaub ntawv kub tsis raug, uas tuaj yeem cuam tshuam rau kev tswj cov txheej txheem dav dav.
Txhawm rau lav thermocouples 'kev ua haujlwm mus sij hawm ntev, yog li ntawd, yuav tsum muaj lub tswv yim zoo. Los ntawm kev xaiv cov khoom raug, ua kom nquag plias, txhim kho kom raug, kev tiv thaiv ib puag ncig, kev saib xyuas, kom txuag hluav taws xob zoo sib txuas, txhua theem yog qhov tseem ceeb. Los ntawm kev tsom mus rau cov yam ntxwv no, cov neeg siv tuaj yeem tso siab rau cov thermocouples los muab kev nyeem ntawv ntsuas kub zoo nyob rau lub sijhawm ntev, yog li tso cai rau kev khiav haujlwm ntawm ntau yam haujlwm nyob ntawm kev tswj qhov kub thiab txias.