Dab tsi yog qhov yuam kev ntawm threaded thermocouples
Tso lus
Ntsia hlau- hom thermocouples yog ua haujlwm hauv cov khoom siv ntsuas kub ntsuas vim lawv qhov yooj yim installation thiab sealing zoo. Cov thermocouples no yog screwed los yog threaded rau cov khoom nto los yog lub qhov, ua rau lawv zoo tagnrho rau qhov chaw me me los yog yooj yim disassembly thiab sib dhos. Txawm tias nyob rau hauv kev ua haujlwm nyuaj xws li kub siab, kev vibration, thiab corrosion, kev ua haujlwm tsis zoo tuaj yeem tshwm sim. Cov teeb liab tsis sib xws, teeb meem kev sib txuas, kev cuam tshuam ib puag ncig, thiab kev puas tsuaj rau lub tshuab yog qhov ua txhaum loj raws li cov yam ntxwv ntawm cov qauv thiab kev ua haujlwm hauv cheeb tsam.
I. Kev Nyeem Ntawv Tsawg / Thermoelectric Potential
Feem ntau qhov ua txhaum ua rau qhov ntsuas kub tau qis dua li tus nqi tiag tiag.
Sab hauv thermocouple rwb thaiv tsev deterioration lossis noo noo ingress:
Cov dej los yog cov plua plav conductive tuaj yeem nkag mus rau hauv lub raj tiv thaiv los ntawm xoob ntsia hlau sealing los yog cov khoom siv hluav taws xob, ua rau cov dej ntws tawm ntawm cov thermoelectrodes thiab casing thiab txo cov peev xwm tso tawm.
Kev daws: Tshem cov tub ntxhais thermocouple, ziab cov thermoelectrodes thiab insulating ceramic raj, thiab hloov lub sealing gasket yog tias puas.
Thermal electrode deterioration ("ntsuab corrosion"):
Kev siv txuas ntxiv ntawm K-hom thermocouples saum toj 900℃tuaj yeem ua rau xaiv oxidation thiab txheej ntsuab corrosion, uas ua rau muaj peev xwm txo qis thiab cov yam ntxwv thermoelectric drift.
Kev daws: Tshem tawm qhov degraded thiab reweld lossis hloov nrog N-hom thermocouple.
Junction box plua plav lossis luv Circuit Court:
Kev sib txuas tsis zoo ntawm lub thawv sealing cia cov plua plav thiab cov khib nyiab hlau hla ntawm cov terminals, ua rau ib feem luv luv Circuit Court lossis grounding thiab impeding teeb liab.
Kev daws: Ntxuav lub thawv sib txuas tsis tu ncua thiab fim lub qhov tawm mus rau hauv qab kom tsis txhob muaj kab mob.
Polarity los yog compensating hlau mismatch:
Rov qab cov ncej zoo thiab tsis zoo los yog siv tsis yog - sib piv cov xaim them nyiaj (piv txwv li, K-hom nrog E- hom xov hlau) tuaj yeem thim rov qab cov peev txheej thermoelectric, txo tus nqi sau tseg.
Kev daws: Txheeb xyuas hom calibration, hom hlau, thiab polarity.
II. High Instrument Reading/Thermoelectric Potential
Txawm tias tsis tshua muaj, qhov teeb meem no txo cov kev tswj xyuas qhov tseeb. I. Display Instrument-Thermocouple Incompatibility
Yog tias lub thermocouple yog hom S tab sis qhov ntsuas yog hom K, tib lub peev xwm thermoelectric yuav raug suav tias yog qhov kub siab dua.
Kev daws: Standardize thermocouple thiab ntsuas ntsuas calibration.
Overlapping DC cuam tshuam
Thaum nyob ze - cov khoom siv hluav taws xob DC lossis vim muaj qhov txawv txav hauv av, cov voj voog hauv av yuav raug muab tso rau ntawm qhov ntsuas kub, ua rau kev nyeem ntawv tsis tseeb.
Txhawm rau kom tsis txhob muaj lub voj voog, ua kom cov txheej thaiv npog ntawm ib qho kawg nrog ib qho - taw tes hauv av.
Fluctuating Display Tus nqi (tsis ruaj tsis khov teeb liab tawm)
Cov cuab yeej taw tes thiab cov digital qhia nquag dhia, cuam tshuam tsis siv neeg tswj kev ruaj ntseg.
Kev Tiv Thaiv Tsis Zoo lossis Kev Tiv Thaiv
Untightened ntsia hlau terminals los yog oxidized thermocouple-terminal contact ntos ua rau kev tiv thaiv kev hloov pauv thiab qhov qhia tsis sib xws.
Kev daws: ntxuav qhov chaw tiv tauj, kho cov xaim, thiab siv tshuaj tiv thaiv - oxidation conductive paste yog tias xav tau.
Sab nraud Vibration Loosens Kev Txuas
Thaum ntsia ze ntawm qhov chaw vibration xws li twj tso kua mis thiab compressors, cov ntsia hlau yuav xoob vim qhov ntev - vibration, cuam tshuam rau qhov ntsuas kub kom ruaj khov.
Kev tiv thaiv - loosening washers los yog xauv txiv ntseej thiab kev co damping brackets yuav pab tau.
Intermittent Thermocouple Hlau tawg
Kev qaug zog lossis kev puas tsuaj me me ua rau micro- tawg nyob rau hauv cov thermocouple hlau, tsim kom muaj kev sib cuag nyob rau hauv kev co thiab teeb liab variations.
Kuaj qhov kev tiv thaiv Circuit Court nrog ib tug multimeter; hloov lub thermocouple tam sim yog tias nws hloov pauv.
Electromagnetic cuam tshuam
Thaum nyob ze cov khoom siv hluav taws xob muaj zog xws li inverters thiab motors, alternating magnetic teb tej zaum yuav induce cuam tshuam voltage nyob rau hauv lub teeb liab kab.
Kev daws: Siv cov hlua hluav taws xob tiv thaiv kev tiv thaiv, kom deb ntawm cov hluav taws xob cables, thiab tsis txhob muab tso rau hauv tib lub raj xa hluav taws xob uas muaj zog cables.
IV. Tsis muaj thermoelectric tej zaum tso zis (tsis muaj zaub lossis yuam kev)
Qhov no feem ntau qhia tau hais tias lub teeb liab Circuit Court tawg.
Thermocouple Hlau tawg
Lub thermocouple hlau tawg vim kev txhim kho khoov, siab -kub embrittlement, lossis kev puas tsuaj.
Kev daws: Txiav thiab reweld cov hlau yog tias qhov chaw so tso cai; txwv tsis pub, hloov lub thermocouple. Wiring Error lossis Compensation Wire Break
Cov kab hluav taws xob tawg yog tshwm sim los ntawm cov hlau tawg, kev puas tsuaj rau lub siab, lossis kev xaim tsis raug (qhib Circuit Court).
Kev daws: Txheeb xyuas qhov txuas ntxiv ntawm lub voj voog hauv cov ntu txhawm rau nrhiav thiab kho qhov chaw tawg.
Kev Tiv Thaiv Kev Tiv Thaiv Cov Lus Qhia
Cov kauj ruam no tuaj yeem ua kom cov ntsia hlau-hom thermocouple kev ntseeg tau:
Tshawb xyuas sealing gaskets thiab ntsia hlau nruj txhua lub hlis twg.
Tsis txhob sib txuas cov nyiaj them nqi hluav taws xob thiab ua qauv kev xaim.
Ua kom muaj kev tiv thaiv ib puag ncig: xyuas kom lub thawv sib txuas tau raug kaw kom zoo thiab qhov hluav taws xob qhov hluav taws xob tig mus rau hauv qab kom tsis txhob muaj dej nkag.
Tsim kom muaj ib lub voj voog calibration: Ua rau ntawm -qhov chaw lossis tawm - kab calibration txhua 6-12 lub hlis nyob ntawm qhov kev ua haujlwm.
