Tsis tsim nyog cov khoom cuav thiab qhov tsis zoo ntawm cov khoom siv thermocouple yog ib feem ntawm kev muag khoom tom qab; ncaj qha khaws cia rau hauv cov khoom lag luam rhiav yuav ua rau kev tsim khoom sai sai tom qab kev teeb tsa. Tsim kom tiav cov txheej txheem tshuaj xyuas ua ntej ua ntej warehouses tuaj yeem tshuaj xyuas cov kev sojntsuam tsis zoo ua ntej, txo cov pwm poob qis los ntawm cov khoom tsis zoo. Cov txheej txheem tshuaj xyuas yog nyob ntawm kev soj ntsuam kev pom, kev ntsuas multimeter thiab kev sib piv ntawm qhov kub thiab txias yam tsis muaj cov cuab yeej ua haujlwm loj.
Yam khoom thib ib: Kev tshuaj xyuas qhov muag pom npog npog, hlau, txuas thiab vuam cov ntsiab lus. Tshawb xyuas qhov kev sojntsuam sheath nto rau khawb, pits, perforations thiab tsis sib xws polishing; Cov khoom lag luam tsis zoo siv cov hlau tsis zoo nrog ntau cov ntsiab lus me me uas ya raws sai tom qab siv luv luv. Observe the cable outer braid: qualified high-temperature shielding wires have dense uniform weaving without broken wires, while cheap inferior cables have sparse braids with many gaps unable to block electromagnetic interference. Txheeb xyuas qhov kub ntawm qhov ntsuas qhov taw qhia weld: cov kev sojntsuam tsim nyog tau zoo tag nrho cov vuam tsis muaj qhov tawg me me lossis qhov khoob; inferior probes muaj tsis tiav welding nrog zais disconnection txaus ntshai. Paub qhov txawv K / J hlau xim xim raws li cov qauv IEC thoob ntiaj teb; Cov xim sib xyaw ntawm cov xov hlau qhia txog kev tsim khoom tsis tu ncua yam tsis muaj kev sib koom ua ke, thiab cov khoom siv no raug tso tseg ncaj qha.
Qhov thib ob: Multimeter continuity thiab resistance testing screen open and short-circuit zais defects. Kho lub multimeter rau cov iav tiv thaiv, txuas ob qhov kev sim ua rau qhov zoo thiab qhov tsis zoo ntawm cov thermocouple ntsaws. Cov kev sojntsuam zoo li qub qhia tau tias muaj kev tiv thaiv ruaj khov uas cuam tshuam rau cov hlau ntev; Yog hais tias tus nqi kuj yog infinite, cov xov hlau sab hauv yog tawg thiab tsis tsim nyog. Yog tias tsis kam nyob ze rau xoom, sab hauv qhov zoo thiab qhov tsis zoo ntawm cov xov hlau luv luv -circuit, kuj raug tso tseg. Co lub cable rov qab thiab tawm thaum ntsuas kev tiv thaiv; Yog hais tias tus nqi tsis kam hloov pauv ntau heev, muaj cov hlua tawg zais hauv cov hlau, uas yuav ua tsis tiav tom qab cua sov nthuav dav thiab tsis tuaj yeem muab tso rau hauv qhov chaw seem.
Yam thib peb: Kev sib piv qhov ntsuas kub yooj yim los tshuaj xyuas cov khoom hnyav drift uncalibrated. Siv tus qauv ntsuas ntsuas ntsuas ntsuas ntsuas ntsuas ntsuas ntsuas ntsuas ntsuas, khi nws qhov ntsuas qhov ntsuas kom nruj nrog lub ntsuas ntsuas lub taub, tom qab ntawd ua kom sov qhov sib koom tes nrog rab phom cua kub rau 300-400 degree. Txuas ob lub probes rau ob txoj kev ywj pheej ntawm tib lub ntsuas kub, saib xyuas qhov sib txawv ntawm kev nyeem ntawv. Yog tias qhov sib txawv ntawm qhov kub siab tshaj ± 4 degree, qhov ntsuas qhov ntsuas tau muaj qhov tsis sib haum xeeb loj thiab raug txiav txim tsis tsim nyog, vim nws tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm qhov kub thiab txias.
Plaub yam khoom: Khoov qhov qaug zog qhov chaw kuaj xyuas qhov khoov khoov thiab cov khoom me me. Random xaiv 10% ntawm cov batch me me thermocouples, khoov lub cable ntawm qhov tsawg kawg nkaus khoov vojvoog rov qab thiab tawm 100 zaug, tom qab ntawd ntsuas qhov kev tawm tsam dua nrog lub tshuab multimeter. Yog tias qhib Circuit Court lossis hloov pauv tsis zoo tshwm sim tom qab khoov, ntau -strand wire core muaj cov khoom tsis zoo thiab tag nrho cov khoom xa rov qab mus rau tus neeg muag khoom. Cov khoom soj ntsuam no tsom rau cov micro probes thiab hloov pauv hloov pauv ntu thermocouples muaj feem cuam tshuam rau pob txha tawg.
Yam thib tsib: Kev tshuaj xyuas cov khoom siv rau cov khoom tshwj xeeb -qib cov khoom seem. Rau cov zaub mov- qib, kev kho mob thiab tiv thaiv- cov khoom siv tiv thaiv corrosion, xyuas cov ntaub ntawv soj ntsuam cov ntaub ntawv txuas ntxiv kom paub meej tias cov ntaub ntawv alloy muaj pes tsawg leeg, roj- rwb thaiv tsev dawb thiab PTFE txheej txheem. Yog tias cov ntaub ntawv pov thawj tsis muaj pov thawj, tshem tawm cov khoom lag luam thiab xa rov qab mus txog thaum muab cov ntaub ntawv tsim nyog tiav.
Tom qab dhau tag nrho tsib qhov kev tshuaj ntsuam xyuas, muab cov ntawv pov thawj tsim nyog ntawm txhua lub thermocouple, hom cim, sheath txoj kab uas hla, xaim ntev thiab calibration hnub, thiab muab faib cia los ntawm daim ntawv thov scenario kom tsis txhob sib xyaw thaum lub sij hawm tu pwm. Kev soj ntsuam nruj me ntsis ntawm cov khoom siv thermocouple tshem tawm ntau dua 80% ntawm qhov tsis zoo ntawm cov sensor zais qhov txaus ntshai los ntawm qhov chaw, ua kom ruaj khov txhua hnub ua haujlwm ntawm cov pwm kub khiav.
