Yuav ua li cas txiav txim siab yog tias Platinum Resistance Temperature Detector nrog Hlau Tube sojntsuam ntxig rau hauv lub thawv Junction yog qhov ua txhaum

Nyob rau hauv kev lag luam, platinum kuj kub detectors nrog hlau raj probes muab tso rau hauv hlws ris thawv yog heev heev rau ntsuas kub. Faults feem ntau tshwm sim raws li kev nyeem ntawv kub txawv txawv, teeb liab hloov, lossis ntsuas ntsuas yuam kev. Txhawm rau kom paub seb puas muaj qhov ua haujlwm tsis zoo, koj yuav tsum ua qhov ntsuas ntsuas tag nrho uas suav nrog ntsuas kev tiv thaiv, ntsuas kev ntsuas hluav taws xob, saib lub kaw lus, thiab daws teeb meem.




I. Kev ntsuas qhov tsis kam: Tshawb xyuas qhov xwm txheej ntawm qhov ntsuas qhov ntsuas



Thawj kauj ruam hauv kev nrhiav qhov teeb meem yog siv digital multimeter los ntsuas qhov tsis kam ntawm cov hlau lead ntawm platinum tsis kam kub sensors. Tus qauv Pt100 yog qhov nrov tshaj plaws, thiab nws cov nqi tiv thaiv kom meej meej txuas rau qhov kub thiab txias:



Ntawm 0 ° C, nws yog 100Ω, thiab rau txhua 1 ° C nce, nws nce mus txog 0.385Ω (tseem ua raws li Daim Ntawv Teev Npe -Van Dusen equation).



Koj tuaj yeem ua qhov kev kwv yees ntxhib xws li: 110Ω ≈ 26℃, 120Ω ≈ 52℃, thiab 138.5Ω ≈ 100℃.



Cov txheej txheem tsis zoo rau kev txiav txim:



Infinite resistance (qhib Circuit Court): ib tug platinum hlau tawg, ib tug hlau lead uas tau tuaj dawb, los yog ib tug txiav tawm uas yog unfastened.



Tsis tshua muaj kev tiv thaiv los yog tsis muaj kev tiv thaiv tag nrho: ib qho luv luv Circuit Court, uas tuaj yeem tshwm sim los ntawm kev ya raws, damp muab tub lim, lossis hlau shavings.



Drifting thiab tsis ruaj khov kuj tuaj yeem tshwm sim los ntawm kev xoob xaim, kev sib cuag tsis zoo, lossis tsim cov txheej txheem oxide.



Nws yog qhov zoo tshaj plaws los ntsuas qhov kub ntawm chav tsev thiab tom qab ntawd xyuas cov txiaj ntsig tiv thaiv lub ntsuas kub ntawm qhov chaw kom paub tseeb tias tsis muaj qhov yuam kev vim qhov chaw nyob ib puag ncig.







II. Rwb thaiv tsev Performance Test: Nrhiav kev pheej hmoo ntawm Environmental Intrusion



Siv 500V megohmmeter los ntsuas qhov rwb thaiv tsev ntawm cov hlau lead thiab cov ntaub ntawv hlau:



Tus qauv tus nqi yog ≥100MΩ (IEC 60751).



Yog tias nws tsawg dua 1MΩ, nws txhais tau hais tias cov dej noo, roj, lossis cov khoom corrosive tau nkag mus, uas tuaj yeem ua rau luv luv lossis cuam tshuam nrog cov teeb liab.



Yog tias qhov kev nyeem ntawv nyob nruab nrab ntawm 1 thiab 10MΩ, nws yog ib qho kev ceeb toom qhia tias kev sib khi lossis ziab yuav tsum tau txhim kho.



Tseem ceeb: Yog tias tus nqi rwb thaiv tsev poob qis, nws qhia tau tias kev tiv thaiv ua tsis tiav, txawm tias tus nqi tiv thaiv yog qhov qub. Qhov no yuav ua kom cov laus laus zuj zus mus.







III. Txheeb xyuas lub thawv sib txuas thiab cov xwm txheej ntawm kev sib txuas



Lub thawv sib txuas yog ib qho chaw uas feem ntau mus tsis ncaj ncees lawm. Qee qhov kev nyuaj tshaj plaws yog:



Loose los yog oxidized terminals: tooj liab hlau tuaj yeem oxidize lub sij hawm, uas ua rau kev tiv thaiv siab dua thiab ua rau overheating.



Hlau shavings los yog plua plav buildup tuaj yeem ua rau ib feem luv luv Circuit Court lossis xau, uas tuaj yeem ua rau cov teeb liab tsis ruaj khov.



Cov ntsaws ruaj ruaj uas qub los yog tso dej rau hauv: Cov dej nkag tuaj yeem ua rau xeb lossis puas tsuaj rau rwb thaiv tsev.



Cov lus qhia:



Qhib lub thawv sib txuas txhua zaus los xyuas nws, ntxuav sab hauv, thiab nruj cov terminals.



Txhawm rau khaws qhov ntsuas ntawm IP65 lossis siab dua, hloov cov ntsaws ruaj ruaj qub.



Siv cov xov hlau uas muaj tin -plated los yog silver-plated kom txo qhov kev pheej hmoo ntawm oxidation.







IV. Kev ntsuas qhov tshwm sim thiab kev teeb tsa



Puas yog lub raj hlau zoo li khoov, tiaj tus, lossis zoo li nws tau raug ntaus? Mechanical kev puas tsuaj tuaj yeem tawg platinum hlau hauv.



Puas yog qhov tob ntawm qhov ntxig txaus? Qhov tob tob hauv qhov ntsuas nruab nrab yuav tsum yog tsawg kawg 10 npaug ntawm txoj kab uas hla. Yog tias nws tsis yog, qhov ntsuas kub ntsuas yuav tsis raug.



Puas yog lub hauv paus hniav puas muaj xeb, xeb, lossis xim txawv? Thaum ua haujlwm nyob rau hauv qhov kub thiab txias, high humidity, los yog corrosive cov ntaub ntawv, cov khoom compatibility yog ib qho tseem ceeb heev.



Rau cov khoom siv armored (xws li WZPK series), lawv nyias nyias thiab tuaj yeem tswj kev vibrations zoo, tab sis koj tseem yuav tsum tsis txhob khoov lawv ntau dhau.







V. Kev daws teeb meem ntawm qib system: Tshem tawm kev cuam tshuam sab nraud



Yog tias lub sensor ua haujlwm ib txwm tab sis cov zaub tseem tsis tau, koj yuav tsum xyuas cov hauv qab no:



Txheeb xyuas qhov ntsuas ntsuas thib ob kom paub tseeb tias lawv tau teeb tsa rau Pt100 thiab tias peb lub -hlau / plaub- xov hlau txuas ua haujlwm.



Cable puas lossis cuam tshuam electromagnetic: Siv cov cables thaiv nrog ib qho - taw tes hauv av kom ntev - kis tau tus mob.



Kev ruaj ntseg ntawm cov khoom siv hluav taws xob: Cov kev hloov pauv hauv cov khoom siv hluav taws xob tuaj yeem hloov cov zis ntawm lub transmitter.



Cov lus qhia txog kev saib xyuas ib txwm: Siv lub tshuab ntsuas ntau los ua qhov kev tshuaj ntsuam thawj zaug thiab lub megohmmeter ua ob npaug - xyuas lawv txhua zaus kom tsis txhob muaj teeb meem ua ntej lawv tshwm sim.