Dab tsi yog qhov ntsuas ntsuas qhov ntsuas rau qhov ntsuas hluav taws xob thermocouple?

Qhov ntsuas hluav taws xob thermocouple yuav tsum tau hais tias cov kev siv cov kev siv ntawm tus qauv thermocouple thiab kev ntsuam xyuas thermocouple tau qhia rau hauv {{}}} degree thaum ntsuas calibration. Rau cov khoom hlau uas muaj nqis ntawm R, R, B qhov cim) siv hauv kev ntsuas ua haujlwm, cov xaim ntawm kev ntsuas thermocoup yog mos thiab yooj yim rau xaim; Txawm li cas los xij, rau cov nqi qis siv cov roj hlau siv hauv kev ntsuas hluav taws xob, vim qhov loj ntawm cov khoom siv ntau dua, nws yog qhov nyuaj rau qhia txog qhov kev siv tau xaus rau hauv 0 degree. Yog li ntawd, cov xov hlau them feem ntau siv los qhia qhov kawg qhov kawg ntawm thermocouple rau hauv lub zog khov kho, thiab tom qab ntawd tooj liab cov xov tooj ntawm lub siab-precision digital multimeter rau kev ntsuas.

Qhov ntsuas ntsuas ntsuas qhov ntsuas rau cov txheej txheem thermocouple yog qhia hauv daim duab 1:

Daim duab 1 txoj kev ntsuas yog thaum lub thermocouple cov txheej txheem

1. Cov kev sib txuas tsis raug ntawm cov xov hlau

Nws ntseeg tau tias nrog them cov xov hlau, qhov taw tes khov yuav raug tshem tawm, raws li qhia hauv daim duab 2.

Daim duab 2 Kev Ntsuas Yuam Kev Ntsuas Cov Qauv Ntawm Tsis Siv Kom khov Thaum Thermocouple Cov Txheej Txheem

Nws ntseeg tau tias kev txuas cov xov cov xov hlau zoo dua, tsis yog tsuas yog qhov tseeb thiab tseem ceeb} precision digital, raws li qhia hauv daim duab 3.

Thaum kuaj xyuas lub thermocouple hauv daim duab 3, siv cov hlau roj teeb nruab nrab ntawm 0 degree thiab digital muaj nuj nqi lus

Hauv qab no yog kev txheeb xyuas ntawm qhov yuam kev tsim los ntawm ob daim ntawv xaim no (piv txwv tias tsis muaj cov nyiaj yuam kev hauv cov xov tooj hluav taws xob):

Thaum txuas tau kom raug (saib daim duab 1), yog tias cov xov tooj ntawm thermocouple yog Y thiab cov hluav taws xob tau txais los ntawm High-precision digital muaj peev xwm tau txais raws li:

Ez {{{{0}}}}}} {} {{{{{{{{9} mis 1

Qhov ntsuas kub T1 ntawm kev ua haujlwm kawg ntawm thermocoupric muaj peev xwm ua rau {}}} degree nrog txiav txim siab seb nws puas ua tau raws li qhov yuav tsum tau ua.

Rau qhov xwm txheej hauv daim duab 2, thov kev coj noj coj ua ke ntawm Tsev Kawm Ntawv Qib Nrab, cov hluav taws xob tau txais los ntawm lub siab-precision digital yog:

Ez=ey (T1, T1, T3) + T2) {{{} {{{{9 {} mis "{9}

Piv nrog kab zauv (1), cov tswv yim tawm tswv yim ib puag ncig T2 ntawm cov khoom ntsuas hluav taws xob ntsuas yog qhov txawv ntawm lub peev xwm ntawm {2} degree:

Ey (t1, t 0}} (T1, T2) {, t2, t} {{8} {8}

Yog tias cov txiaj ntsig tseeb yog qis dua qhov muaj peev xwm muaj peev xwm ntawm qhov xwm txheej hauv daim duab 2, qhov sib txawv yog qhov muaj peev xwm ntawm lub qhov cub nrog cua thermocouple cuam tshuam rau {1}} degree.

Rau qhov teeb meem hauv daim duab 3, thov kev coj ua ntawm nruab nrab ntawm kev saib xyuas nruab nrab, tus hluav taws xob tau txais los ntawm lub siab-precision digital yog:

Ez {{{{0}}}} {{{{{{{{{{{{{{{{{15} {{15} {

Los ntawm cov qhabnias ntawm cov sijhawm ua haujlwm, txawm hais tias qhov taw tes khov tau ntxiv, lub siab-precision digital tau nyiaj los ntawm kev sib txuas cov xaim xaim los ntawm qhov khov taw tes. Qhov kawg yog tib yam li Daim Duab 2, qhov twg ntsuas tus nqi qis dua li qhov muaj peev xwm ntawm cov thermocouple lub peev xwm cuam tshuam rau 0 degree.

2. Qhia siv thermocouple tsis siv roj hlau

Hauv kev ntsuas hluav taws xob thermocouple, them nyiaj feem ntau siv rau cov xov hlau ntawm cov xaim hluav taws xob tsawg, tab sis cov xaim hluav taws xob ntawm thermocouple tsis muaj siab. Raws li cov qauv hauv tebchaws, kev ua siab ntev ntawm cov xov hlau kom them cov xov hlau yog ± 2.5 degree rau cov s-khub thiab ± 1.5 degree rau K-khub. Qhov qhia no ntau dhau rau Thermocouple calibration thiab tej zaum yuav ua rau qhov tsis tsim nyog tau ua rau qhov ntsuas thermocouples tsim nyog.

Lub hom phiaj ntawm kev siv thermocouple them nyiaj calibration yog kom them rau qhov ntsuas kub t3 ntawm qhov ntsuas kub ({}} degree) rau kev ntsuas (raws li qhia hauv daim duab 1). Raws li kev xyaum, rau kev ntsuas hluav taws xob ntawm tus nqi qis dua, kev ua haujlwm yog siv, nrog xaim yooj yim xaim, thiab tus nqi qis. Tau qhab-nees kuv thermouples, raws li cov xov cov xov tooj, yuav tsum tau ua kom muaj txiaj ntsig zoo, txwv tsis pub lawv yuav qhia yuam kev ntawm ({}. 5) Qib; Rau kev ntsuas hluav taws xob ntawm cov khoom siv hlau thermocouples (tshwj xeeb yog cov xaim hluav taws xob nrog rau kev siv cov kauj vab ntawm kev ua haujlwm ntawm lub ntsej muag. Thermocouple xaim rau qhov zoo thiab tsis zoo ntawm cov ntsuas thermocouple, thiab cov nyhuv yog qhov zoo tagnrho. Kev siv cov xov hlau thermocouple rau cov ntaub ntawv pov thawj ntawm cov khoom siv hlau thermoco thermoco yog qhov tseeb zoo tagnrho, tab sis tus nqi tsis tsawg. Ntsuas cov xov hluav taws xob uas yuav siv tau, tab sis lawv yuav tsum tau ntsuas thiab tsuas yog siv tom qab tau kho tau qhov tseem ceeb.

Hauv kev tshawb xav, raws li homogeneous tus neeg ua si ntawm thermocupric, lub thermoelectric tus neeg xyuas kev coj ua tsuas yog muab kev ywj pheej ntawm qhov ntsuas kub ntawm cov kub electrode. Yog li cov thermocouple yog ncaj qha txuas nrog lub xaim hluav taws xob, thiab ob lub hluav taws xob ntawm lub ntsuas kub khov, tsis muaj kev xav txog qhov kub thiab txias T3 (saib daim duab 1).

Siv cov xov hlau them nyiaj rau kev sib txuas, nws yuav tsum tau hais tias qhov kub ntawm ob qho kev sib txuas xaus ntawm thermocouple yuav raws li ntawm T3. Txawm li cas los xij, hauv kev txheeb xyuas qhov tseeb, qhov kawg ntawm Thermocouple yog nyob rau thaum xaus ntawm cov ntaub ntawv pov thawj, thiab qhov kub ntawm qhov kawg yog siab heev. Kev cuam tshuam ntawm hluav taws xob thiab cov kev hloov pauv tshav kub nyob ntawm thaj chaw ib puag ncig yog qhov nyuaj ua kom tiav qhov kub me ntawm qhov kawg ntawm qhov tseeb thermocouple. Yog li nyob rau hauv cov txheej txheem pov thawj, qhov yuam kev tshwm sim los ntawm inconentente kub ntawm qhov xaus tau koom rau hauv kev txheeb xyuas qhov tseeb ntawm thermocouple. Los ntawm txuas nrog thermocouple xov hlau, txawm tias qhov ntsuas kub ntawm qhov kawg ntawm lub thermocouple tsis zoo ib yam, nws tsis cuam tshuam rau kev ntsuas cov txiaj ntsig.

3. Xaiv thiab siv cov xov hlau tooj liab

Qhia txog qhov kawg ntawm qhov kawg ntawm thermocouple rau hauv qhov txias taw tes, thiab txuas nws rau kev ntsuas qhov kawg ntawm lub siab-precision digital siv los ntawm cov point tooj liab los ntawm qhov khov taw tes. Qee qhov kev tswj hwm thermocouple muaj cov kev cai, thaum lwm tus tsis ua. Raws li cov kev cai pov thawj ntawm "tus nqi qis dua hlau thermoco thermohoples yuav tsum tau txuas nrog cov hlau ua hlau ntawm cov khoom siv tooj liab thiab thiab kev sib cuag yuav tsum zoo; Txawm hais tias cov kev cai lij choj pov thawj rau "muaj nuj nqis hlau thermocouples xav tau kev cai hloov pauv (lawv tsis qhia qhov twg hom hlau txhuas kom siv. Yog li ntawd, qee tus neeg ua haujlwm tau cov ntsiab lus tsis tsim nyog thiab siv cov xov hlau (cov kev ua yuam kev uas tau txheeb xyuas saum toj no).

Qhov yuav tsum tau ua rau cov kav hlau ua ntawm cov thermocouple siv terminal yog nruj heev. Cov hlau txuas txuas nrog ob tus ncej ntawm cov thermocouple yuav tsum tau siv cov xaim tooj liab ntawm 2}} degree yuav tsum tsawg dua 0.01724 μ ω ω ω ω ·). Vim tias lawv tsis yog tib lub tooj hlau tooj liab, txawm hais tias lawv tiv taus raws li qhov yuav tsum tau ua, muaj kuj sib txawv ntawm lawv. Yog li ntawd, tus khub tsim ntawm ob lub xov tooj tooj liab yuav tsim muaj peev xwm ntxiv thermoelectric muaj peev xwm nyob rau hauv lub thermocouple Circuitle nyob rau hauv cov nyhuv ntawm qhov kub ntawm qhov sib txawv. Qhov ntau ntawm lub zog hluav taws xob muaj feem cuam tshuam nrog qhov sib txawv ntawm ob qho ntawm ob qho ntawm cov xov tooj liab, uas yuav ua kom paub qee qhov yuam kev rau hauv lub thermocouple raug sim.

Tsis tas li ntawd, kev sib txuas ntawm lub tooj hlau tooj liab thiab cov lus siv tsis raug ntawm Thermocoule electrode yuav tsum muaj kev sib cuag. Nws tau raug pov thawj tias tus txheej txheem ntawm kev siv ntses ntses rau clamp yog tseem dav los ntawm ntau cov neeg ua hauj lwm ntsuas. Txawm li cas los xij, hom no yuav qhia qhov ua yuam kev ntawm {0}}}}}}}}}}}.}}}}}}}}}}}}}}}.}}