Dab tsi cuam tshuam rau Ambient Humidity muaj rau Cov Kub Kub Kub Thermocouple Kev Pabcuam Lub Neej?

Rhiav ambient humidity yog ib qho teeb meem ntawm ib puag ncig feem ntau tsis pom zoo uas cuam tshuam rau cov thermocouple kev ua tau zoo heev, tshwj xeeb tshaj yog nyob rau hauv ntug dej hiav txwv txhaj tshuaj molding factories los yog tsawg-dab damp workshops nrog tsawg qhov cua. Cov dej noo ntau dhau nkag mus rau hauv cov txheej txheem thermocouple sab hauv los ntawm cov hlau qhov hluav taws xob qhov khoob, lub davhlau ya nyob twg plugs thiab micro-perforated sheaths tuaj yeem ua rau cov rwb thaiv tsev tsis zoo, oxidation ntawm cov hlau hlau thiab luv - teeb meem hauv Circuit Court. Kev nkag siab txog cov txheej txheem ntawm cov av noo- ua rau muaj kev puas tsuaj thiab ua raws li cov dej noo tsim nyog- pov thawj kev tiv thaiv tuaj yeem ua rau muaj kev pab cuam lub neej ntawm cov sensors nyob rau hauv siab - qhov chaw tsim cov av noo.

High humidity corrodes hlau davhlau ya nyob twg plugs thiab cov ntaub ntawv conductive oxidation films. Ob -pin plugs ntawm lub thermocouple yog tsim los ntawm tooj liab alloy. Nyob rau hauv cov xwm txheej ntawm lub sijhawm ntev - huab cua ntub dej, cov pins tiv tau yooj yim rau oxidize sai sai rau ntawm qhov chaw thiab tsim cov xeb ntsuab. Cov xeb txheej tsub kom qhov kev tiv thaiv tiv thaiv, uas ua rau tsis tu ncua teeb liab attenuation thiab sluggish kub drift. Thaum cov av noo ntau dua 75% RH, cov tee dej condensed tsim hauv lub plhaub ntsaws tom qab qhov kub sib txawv ntawm qhov sib txawv ntawm cov pwm kub thiab cov cua txias hauv chav ua haujlwm, txuas cov pins zoo thiab qhov tsis zoo ncaj qha los tsim kev sib tshuam luv luv - lub tswb ntsuas hluav taws xob. Cov kev tsis zoo no muaj ntau dua rau cov pwm ntawm kev kho mob thiab cov khoom siv hluav taws xob, qhov kev txwv nruj yog muab tso rau hauv cov txheej txheem kev ruaj ntseg. Kev hloov pauv me ntsis kub yuav ua rau cov khoom tsis tsim nyog. Kev saib xyuas tsis tu ncua ntawm cov dej noo{11}} pov thawj: Siv ib txheej nyias ntawm qhov kub thiab txias los tiv thaiv - xeb conductive lubricant rau ntawm cov pins. Khaws cov khoom siv thermocouples rau hauv cov thawv ntim khoom pov thawj{14}}cov ntaub ntawv pov thawj nrog lub hnab desiccant.

Moisture ingress degrades magnesium oxide insulating hmoov nyob rau hauv armored sheaths. Cov me me magnesium oxide muab tub lim yuav tsum qhuav kiag li kom muaj kev tiv thaiv kev tiv thaiv siab tshaj 1000MΩ. Thaum cov dej vapor nkag mus rau hauv lub hnab los ntawm qhov tsis zoo sealing hlau qhov hluav taws xob los yog micro- qhov nyob rau hauv lub sheath, cov hmoov rwb thaiv tsev absorbs noo noo thiab generates conductive ion raws ntawm zoo thiab tsis zoo hlau hlau. Thawj cov cim qhia yog qhov kub thiab txias nce. Thaum cov dej noo tsim tawm, qhov yuam kev luv luv tshwm sim, tus maub los yuav tsum tso tawm tag nrho cov cua sov lub zog thiab lub zos overheating ntawm cov kub khiav tshwm sim. Tus nqi qis qis dua cov thermocouples zam qhov siab -kub silicone sealing kua nplaum ntawm lub qhov hluav taws xob thiab tsis muaj qhov cuam tshuam cov dej noo zoo, yog li lawv ua tsis tiav hauv 1-2 lub hlis hauv high{11}}cov chaw ua haujlwm av noo. Hwm kub khiav tshwj xeeb thermocouples ntiav ob txheej txheej sealing qauv ntawm lub qhov hluav taws xob hlau los tiv thaiv kev nkag ntawm dej vapor.

Alternating condensation thiab kub kub ceev corrosion ntawm alloy hlau. Thaum cov pwm ua tiav cua sov, qhov kub ntawm cov thermocouple sheath ntsib nrog cov huab cua txias, thiab cov txheej dej condensed yog tsim rau ntawm cov hlau. Cov yeeb yaj kiab dej evaporates sai sai thaum tus kub khiav rov qab ua haujlwm tom ntej no tawm ntawm cov kab mob corrosive ntawm lub plhaub thiab cov hlau hlau sab hauv. Rov ua dua cov voj voog ua rau pitting corrosion ntawm 304 stainless hlau sheaths thiab tom qab rau qhov. N-hom Inconel sheath thermocouples muaj cov dej noo zoo dua thiab tiv thaiv corrosion, thiab yog qhov pom zoo xaiv rau kev tsim cov kab hauv cov chaw ua haujlwm ntub dej hauv ntug dej hiav txwv. Raws li kev tiv thaiv kev tiv thaiv, lub sijhawm hloov pauv ib txwm rau K- hom qauv ntsuas ntsuas hauv cov huab cua ntub yuav raug txo los ntawm rau lub hlis mus rau peb lub hlis.

Cov av qis qis dua 30% RH kuj tseem yuav muaj teeb meem zais txawm tias tsis hnyav li cov av noo siab. Cov huab cua qhuav heev ua rau tsim-vim hluav taws xob zoo li qub ntawm cov kab hluav taws xob ntev thermocouple xaim hluav taws xob ua rau muaj hluav taws xob siab tam sim ntawd cuam tshuam rau cov hluav taws xob tsis muaj zog thiab ua rau qee zaus qhov kub tsis xav tau nce. Kev cuam tshuam zoo li qub vim huab cua qhuav yuav raug tshem tawm los ntawm kev tiv thaiv kev tiv thaiv braids ntawm tag nrho cov thermocouple xov hlau.

Ua kom tiav cov av noo tswj cov kev daws teeb meem yog kev cob qhia ib puag ncig kev hloov kho thiab cov thermocouple txuam kev xaiv. Moulding Rhiav yuav tsum nruab cov khoom siv dehumidification, kom cov av noo nyob nruab nrab ntawm 40% - 65%RH. Kub khiav pwm rau nruab qhov hluav taws xob rwb thaiv tsev baffles kom txo qhov kub ntawm qhov sib txawv condensation. Thaum xaiv cov thermocouples rau cov kab ntau lawm, xaiv cov uas muaj ob txoj hlua khi hlua khi, tiv thaiv- xeb nickel-plated plugs thiab Inconel anti-corrosion sheaths. • Thaum cov pwm raug kaw rau lub sijhawm ntev, tshem cov thermocouples thiab khaws cia rau hauv cov thawv qhuav. Tsis txhob tso lawv rau ntawm daim hlau ntub dej vim tias noo noo yuav tsim nyob rau hauv lub hnab.