Dab tsi yog qhov sib txawv ntawm thermocouple thiab thermistor teeb hluav taws xob tawm?

Dab tsi yog qhov sib txawv ntawm thermocouple thiab thermistor teeb hluav taws xob tawm?

Thermocouples thiab tus kws ua kub yog ob lub sensors, tab sis lawv yog ob yam sib txawv ntawm cov khoom saib xyuas. Qhov sib txawv ntawm ob qho kev soj ntsuam cov ntsiab lus tseem ceeb heev. Niaj hnub no, tus kws kho ntawv yuav qhia lawv rau koj
Ib qho ntawm qhov sib txawv yog qhov sib txawv hauv cov paib tso zis ntawm thermocouples thiab tus ua kub.
1. Qhov xwm txheej ntawm lub teeb liab yog tias lub thermistor nws tus kheej yog ib qho resistor, thiab hloov hauv qhov kub thiab tsis zoo hloov pauv ntawm cov cua nab kuab. Thermocouples, ntawm qhov tod tes, tsim kev hloov pauv hauv voltage uas sib txawv nrog kub.
2. Qhov ntsuas kub thiab txias tau kuaj pom los ntawm ob lub sensors yog txawv. Lub thermal kuj feem ntau kuaj pom qhov kub thiab txias tau mus txog 600 degrees (ntawm chav kawm, qhov ntsuas kub tsis zoo yuav raug kuaj pom). Thermocoples tuaj yeem tshawb xyuas qhov kub thiab txias ntawm {3}} kev hloov pauv ntawm 3051 yog li ntawd Rosemounter tau siv rau kev kuaj ntsuas qis thiab ntsuas kub siab.
3. Los ntawm cov khoom pom zoo, thermal kuj yog ib hom khoom siv hlau uas yog qhov sib txawv ntawm ob hom sib txawv ntawm ob lub xov hlau sib txawv vim qhov ntsuas kub.
4. Lub tswv yim modules rau thermal resistors thiab thermooples sib raug rau PLCS kuj txawv. This statement is not a problem, but generally PLCs are directly connected to 4-20mA signals, while thermal resistors and thermocouples are usually connected to PLCs with transmitters. Yog tias nws txuas nrog DCS, tsis tas yuav siv lub tshuab xa khoom! Tus thermistor yog RTD teeb liab, Thermocouple yog TC lub cim!
5. Plc tseem muaj thermalistion module thiab thermocouple module, uas tuaj yeem ncaj qha cov tswv yim tsis kam thiab thermocouple paib.
6 Txawm li cas los xij, thaum them nyiaj feem xyuam nrog, tag nrho cov nqi ntawm thermocoup yog siab dua