Thermocouple Calibration Interval: Yuav Ua Li Cas Txiav Txim Siab Zoo

cov ermocouples. Ntau qhov kev khiav hauj lwm yog ua raws li lub sij hawm random tawm ntawm tus cwj pwm los yog saib tsis taus calibration nkaus kom txog thaum raug teeb meem ua rau kev tsim khoom qeeb lossis tsis zoo. Qhov tseeb yog, tsis muaj leej twg -loj- haum- teb tag nrho- tab sis lub sijhawm zoo tuaj yeem txhais tau tias qhov sib txawv ntawm cov ntaub ntawv txhim khu kev qha thiab cov nqi yuam kev.

Ua ntej, nws yog ib qho tseem ceeb kom nkag siab tias vim li cas thermocouple calibration tseem ceeb. Thermocouples ua hauj lwm los ntawm kev tsim ib qho hluav taws xob raws li qhov kub thiab txias sib txawv ntawm ob yam hlau sib txawv. Sij hawm dhau mus, yam xws li siab - qhov kub thiab txias, tshuaj corrosion, mechanical hnav, thiab txawm tias thermal shock tuaj yeem hloov cov khoom hlau, uas ua rau kev ntsuas drift. Qhov drift no tsis yog ib txwm pom thaum xub thawj, tab sis nws sib sau ua ke maj mam, ua calibration ib kauj ruam tseem ceeb kom tswj tau qhov tseeb.

Raws li kev paub dhau los, calibration interval hinges ntawm ntau yam tseem ceeb es tsis yog lub sijhawm teem sijhawm. Kev ua haujlwm ib puag ncig plays lub luag haujlwm tseem ceeb. Thermocouples siv rau hauv cov xwm txheej hnyav- xws li siab - qhov cub kub siab tshaj 1000℃, cov txheej txheem tshuaj corrosive , lossis cov ntawv thov uas muaj qhov kub thiab txias ntau zaus - xav tau kev ntsuas ntau zaus. Hauv cov xwm txheej no, kev nrawm nrawm nrawm, yog li lub sijhawm ntawm 3 mus rau 6 lub hlis feem ntau tsim nyog. Ntawm qhov tod tes, cov thermocouples nyob ruaj khov, ib puag ncig me me xws li kev ntsuas qhov ntsuas kub ib puag ncig tuaj yeem txuas ntxiv mus rau 12 lub hlis lossis ntev dua.

Kev thuam ntawm daim ntawv thov yog lwm yam tsis yog -kev sib tham. Hauv kev lag luam uas qhov ntsuas kub raug cuam tshuam ncaj qha rau cov khoom lag luam kev nyab xeeb lossis kev ua raws cai-xws li kev tsim khoom siv dav hlau, kev ua tshuaj, lossis kev ua kom tsis muaj zaub mov- lub sijhawm luv dua yog qhov yuav tsum tau ua. Cov qauv kev cai feem ntau hais txog qhov tsawg kawg nkaus calibration zaus ntawm no, tab sis nws yog qhov zoo los ntxiv qhov tsis raws li keeb kwm kev ua haujlwm. Rau cov ntawv thov tsis tshua muaj txiaj ntsig zoo li cov cua sov hauv chav ua haujlwm, lub sijhawm ntev dua tuaj yeem siv tau ntev npaum li kev kuaj pom tsis tu ncua.

Hom thermocouple kuj cuam tshuam cov kev xav tau calibration. Base hlau thermocouples (xws li K, J, lossis T hom) yog qhov yooj yim dua rau kev sib piv rau cov hlau tsis zoo (xws li S lossis R hom). Qhov no yog vim cov hlau hauv paus muaj kev cuam tshuam rau oxidation thiab cov khoom qaug zog ntawm qhov kub thiab txias. Nyob rau hauv kev xyaum, lub hauv paus hlau thermocouples feem ntau yuav tsum tau calibration ob zaug ntau npaum li noble hlau sawv daws yuav nyob rau hauv tib yam kev ua hauj lwm tej yam kev mob.