Yuav ua li cas los txiav txim siab yog tias Sheathed Platinum Resistance Temperature Detector (PTT) Muaj Qhov Ua Tsis Zoo

Txhawm rau kom paub seb puas yog ob lub -conduit- mounted PTT lub thawv muaj teeb meem tsis tu ncua, koj yuav tsum tau ua ib qho kev ntsuam xyuas ntawm - qhov chaw uas saib nws cov hluav taws xob thiab lub cev. Ua ntej, tshem tawm cov khoom siv hluav taws xob thiab saib lub thawv sib txuas. Xyuas kom lub hau npog ntsej muag, tshawb xyuas cov dej tsim tawm, thiab nrhiav cov hlua khi uas nyuaj, tawg, lossis daig. Yog tias koj pom cov dej stains, pwm, lossis cov qog xoob, nws txhais tau hais tias kev tiv thaiv tsis ua tiav thiab noo noo tau nkag mus rau hauv. Qhov no yog lub cim qhia tias lub rwb thaiv tsev yog pib tawg. Tom ntej no, siv 500V megohmmeter los xyuas seb qhov rwb thaiv tsev ua haujlwm zoo ntawm rooj plaub thiab cov terminals. Yog tias tus nqi qis dua 10MΩ, thiab tshwj xeeb tshaj yog tias nws nyob qis dua 1MΩ hauv qhov chaw ntub dej, nws yog qhov tseeb tias qhov dej ntws los yog electrochemical tsiv teb tsaws tau tshwm sim. Nyob rau hauv cov xwm txheej no, lub teeb liab yuav ib txwm drift los yog hloov, txawm tias tus nqi kuj yog ib txwm.




Cov kauj ruam tom ntej yog ntsuas tus nqi tsis kam ntawm PTT lub thawv nws tus kheej yog tias qhov kev tiv thaiv insulating zoo. Siv ib lub ntsuas ntsuas nrog qhov raug siab los xyuas qhov kev tawm tsam ntawm R12, R13, thiab R23. Ntawm 0 degree, qhov nominal tsis kam ntawm Pt100 yog 100Ω. Yog tias qhov ntsuas tus nqi raug tawm los ntawm ntau dua ± 0.5Ω, lossis yog tias rov ntsuas dua ntawm tib qhov ntsuas kub qhia qhov hloov pauv loj, nws txhais tau hais tias platinum hlau tau muaj hnub nyoog vim nws raug kub siab, sulfide paug, lossis lattice deformation. Yog tias qhov ntsuas qhov ntsuas tsis zoo yog qis dua tus nqi nominal (piv txwv li, qis dua 95Ω), nws yog qhov ua tau tias cov hlau platinum kov lub raj tiv thaiv vim tias lub raj sab hauv tau corroded, uas ua rau hauv av luv luv Circuit Court. Hauv qhov xwm txheej no, kev nyeem ntawv kub yuav nyob qis, thiab nws yuav mob zuj zus ntxiv thaum qhov kub nyob ib puag ncig nws nce. Yog hais tias tus nqi kuj yog infinite, cov hlau lead tau tawg vim qaug zog. Qhov kev tawg yog ib txwm nyob hauv 50mm ntawm lub thawv ntim khoom noj. Txhawm rau kuaj xyuas cov kab nrib pleb ntawm cov hlau tsis zoo, cov hlau lead hlau khoov yuav tsum tau muab sib cais thiab saib.







Txhawm rau txiav txim siab ntxiv, koj yuav tsum xav txog seb qhov ntsuas kub cuam tshuam li cas. Muab lub sensor tso rau hauv da dej nrog qhov kub thiab txias uas koj paub thiab saib seb nws yuav siv sij hawm ntev npaum li cas rau lub ntsuas ntsuas. Yog hais tias cov lus teb yuav siv sij hawm ntau tshaj 30 vib nas this, los yog yog hais tias muaj ib tug nonlinear dhia thaum lub sij hawm ib tug kub theem hloov, nws txhais tau hais tias lub airtightness ntawm cov hlab yog tawg thiab cov qhuav los yog inert roj ntawm lub puab thiab sab hauv hlab tau dim. Qhov no tau ua rau txoj kev txawv txawv rau cov cua sov ntws. Txawm hais tias cov rwb thaiv tsev thiab cov qib tsis kam zoo li tsim nyog, lub kaw lus tseem yuav xa tawm cov teeb liab tsis ruaj khov hauv qhov piv txwv no. Hauv qhov chaw corrosive heev xws li pyrolysis furnaces thiab cov dej qab ntsev desalination chaw, "ob chav tsis ua haujlwm" tshwm sim thaum dej nkag mus rau hauv lub thawv sib txuas thiab pitting corrosion tshwm sim rau sab nraud ntawm lub raj tib lub sijhawm. Nyob rau tib lub sijhawm, kev ncaj ncees ntawm cov raj tiv thaiv yuav tsum tau kuaj xyuas; tsuas yog hloov lub thawv sib txuas yuav tsis kho qhov teeb meem.







Thaum kawg, koj yuav tsum tau tshem ntawm kev cuam tshuam sab nraud. Xyuas kom pom tias cov hlau lead yog ncaj nraim, ntim khoom, lossis nyob rau hauv kev ntxhov siab, thiab xyuas kom meej tias cov terminals tsis muaj oxidation thiab xoob kom tsis txhob muaj kev cuam tshuam tsis zoo ntawm lub sensor vim kev sib cuag tsis zoo. Yog tias tag nrho cov yam ntxwv hluav taws xob zoo li qub tab sis lub kaw lus tseem pom muaj teeb meem, piv cov ntaub ntawv nrog rau lwm cov sensors uas ua haujlwm tib yam. Yog tias qhov channel no tsuas yog ib qho uas drifts, lub platinum tiv thaiv tus pas ntsuas kub tej zaum yuav tawg. Tag nrho cov txheej txheem kuaj mob yuav tsum ua raws li cov cai ntawm "sab nraud ua ntej sab hauv, hluav taws xob ua ntej thermal, zoo li qub ua ntej dynamic." Qhov no txhais tau hais tias koj yuav tsum tsis txhob sib cais yam tsis paub tias koj tab tom ua dab tsi, thiab koj yuav tsum xyuas kom meej tias qhov kev kuaj mob yog qhov tseeb thiab ceev.