Yuav ua li cas calibration cov kev pab cuam rau thermocouples

Txhua qhov kev pabcuam calibration rau cov hom thermocouples uas nquag siv yog muab los ntawm NIST ntawm qhov ntsuas ntawm -196 degree C rau +2100 degree C. Qhov ntsuas kub rau ib qho kev ntsuas tshwj xeeb yog nyob ntawm hom xaim lossis thermocouple xa.
Thermocouples tuaj yeem ntsuas tau los ntawm kev sib piv lossis qhov ntsuas qhov ntsuas ruaj khov, nyob ntawm seb hom thermocouple, ntsuas qhov ntsuas kub, thiab qhov xav tau qhov tseeb. Ob txoj hauv kev tuaj yeem taug qab rov qab mus rau Ntiaj Teb Kub Nplai (ITS-90) hauv xyoo 1990. Kev sib piv ntawm cov xov hlau thermocouple yog siv los ua cov khoom siv thermocouple rau NIST tu. Cov ntsiab lus calibration ruaj khov ntawm cov thermocouples siv plaub qhov ntsuas kub ntawm ITS -90: cov ntsiab lus solidification ntawm zinc, txhuas, nyiaj, thiab kub.
Siv thawj lossis thib ob txoj hauv kev los ntsuas ib ceg thermocouples tiv thaiv platinum thermoelectric siv tus qauv Pt-67 tswj los ntawm NIST.
NIST thermocouple calibration tsuas yog xav tau cov xov hlau liab xwb. Peb cia siab tias cov neeg siv khoom tsis xa cov khoom siv hluav taws xob ceramic thiab cov kav dej tu, vim tias lawv yuav raug puas tsuaj thaum thauj. Yog hais tias lub thermocouple raug xa mus rau hauv lub mounting bracket, xws li ib tug txij nkawm tubing los ua ke, ib tug tshwj xeeb dismantling nqi yuav raug them, thiab cov khoom yuav rov qab unassembled.
Qhov ntev ntawm cov thermocouple xov hlau xa mus rau calibration yuav tsum yog tsawg kawg:
Sib piv calibration
E-hom, J-hom, K-hom, N-hom, T-hom, S-hom, 70 hom
B-hom yog 80 centimeters
W / Re yog 100 centimeters
Tsau taw tes calibration -100 centimeters
Hais txog lub hauv paus hlau thermocouples (E, J, K, N, thiab T hom) thiab cov khoom siv thermocouple, tsuas yog cov thermocouples uas tsis siv tau tsim nyog rau kev sim. Calibration yuav tsuas yog ua thaum lub thermocouple tuaj yeem ncav cuag qhov raug.