Cov thermocouples uas tau dhau los ua polarized yuav tsum tau kaw tam sim ntawd thiab hloov nrog cov tshiab. Qhov kub drift tshwm sim los ntawm kev tsiv teb tsaws ion sab hauv yog qhov kev puas tsuaj uas tsis tuaj yeem rov qab los rau qhov tseeb los ntawm kev kho lossis calibration.
1. Cov kauj ruam ua haujlwm tam sim ntawd
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Cov kauj ruam |
Cov lus qhia ua haujlwm |
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① Kaw thiab Fais fab tuag |
Tam sim ntawd nres lub cua sov. Tos kom txog thaum qhov kub poob qis dua 80℃ua ntej rov ua haujlwm, ua kom muaj kev nyab xeeb. |
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② Disassembly & Tshuaj xyuas |
Tshem cov thermocouple thiab xyuas cov kab nrib pleb, carbonization, los yog corrosion ntawm ceramic sheath los yog terminals. |
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③ Rwb thaiv tsev Test |
Siv 500VDC megohmmeter los kuaj cov rwb thaiv tsev tiv thaiv hauv av. Yog nws yog<10MΩ, the thermocouple is considered faulty. |
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④ Hloov nrog Tshiab |
Xaiv ib hom N- hom lossis hloov kho K- hom thermocouple, nyiam dua nrog alumina ceramic + PTFE shielded hlau. |
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⑤ Kev teeb tsa & Kev Tshawb Fawb |
Tom qab hloov pauv, sib piv qhov ntsuas kub nrog lub ntsuas kub infrared. Lub thermocouple tuaj yeem muab tso rau hauv kev ua haujlwm tsuas yog tias qhov sib txawv<±3℃. |
2. Kev Tswj Xyuas Kev Tiv Thaiv:
Tsim kom muaj lub voj voog hloov uas yuav tsum tau hloov: Hloov cov thermocouples txhua 12 lub hlis raws li kev ua haujlwm ib txwm muaj, txo qhov no mus rau 6 lub hlis rau siab - cov kab ntau lawm;
Kev sib piv ntawm lub hli infrared: Siv lub tshuab hluav taws xob infrared thermal imager los yog qhov chaw kub kub los ntsuas qhov ntsuas kub ntawm lub taub hau pwm. Tshaj tawm ib qho kev ceeb toom yog kuaj pom tsis tu ncua (piv txwv li, nce txhua hli ntawm +2℃);
Cov ntaub ntawv khaws cia: Tsim kom muaj "Cov Ntaub Ntawv Siv Thermocouple" txhawm rau taug qab lub sijhawm teeb tsa, hloov cov ntaub ntawv, thiab qhov sib txawv;
Kev tiv thaiv kev tiv thaiv kom zoo: Siv cov ntaub thaiv kev sib tw -pair cable nrog ib zaug -kawg grounding rau qhov ntsuas kub ntawm cov xaim hluav taws xob kom txo qis kev cuam tshuam.
