Yuav ua li cas hloov cov thermal ua rau cov teeb liab rau cov ntsuas kub uas siv multimeter
Ob qho tib si siv cov neeg ua haujlwm sib xyaw ua ke thiab cov multivital motioners tuaj yeem kwv yees kwv yees kwv yees kwv yees qhov kub ntawm lub rhaub dej resistor.
Cov feem ntau siv thermal resistors suav nrog (P Plevinum resistors) PT100, PT1000, thiab (C Toojpper Desistors) CU50, CU100.
Qhov ntsuas kev ntsuas ntawm PT1 0}}}}}}}}}} {degree ntawm ± 0.2 degree ntawm ± 0.1%. Qhov ntsuas tau ntau ntawm PT1000 Platinum resistor tsuas yog -200 ~ 250 degree yog tib yam li PT100.
Kev ntsuas ntsuas ntawm Cu5 0}}}} {degree ntawm ± 0.4 degree, thiab ib qho kev ua yuam kev ntawm ± 0.1%.
Cia peb tham txog PT100 tus thermistor hauv qab no.
PT100 tsuas yog kev nrhiav tau thiab nrhiav kom muaj feem tiv thaiv, uas yuav tsum tau nruab nrog ib pab 5v ~ 24V dc cov khoom siv hluav taws xob thaum lub sijhawm ua haujlwm. Siv cov moj khaum wheatstone, cov hluav taws xob hluav taws xob uas yuav raug xa mus rau cov khoom siv sib xyaw ua ke lossis ua tiav los ntawm ib leeg-nti nti kom muaj kev cuam tshuam tus nqi ntsuas kub ntawm cov khoom ntsuas ntsuas. Cov teeb meem kub ntsuas cov lus txib kom tswj tau qhov kub ntawm cov khoom tswj.
Cov ntsuas cua sov siv PT100 siv PT100 feem ntau tau muab faib ua ob lub xaim, peb xaim xaim, thiab plaub kab hlau. Los ntawm nws cov nplai, nws tuaj yeem pom tau tias nws ntsuas ntsuas yog qhov loj, xws li {1} {2}} degree.
Lub npe hu ua PT1 {0 0} tiag tiag hais txog nws tus nqi tiv thaiv ntawm 100 ωms) ntawm tus qauv 0 degree. Thiab raws li qhov kub poob qis dua xoom, nws txoj kev tiv thaiv maj mam txo. Tus nqi tiv taus ntawm -200 degree yog hais txog 18.5 ω. Thiab thaum qhov kub nce los ntawm 0 degree, nws tus nqi tiv taus nce. Piv txwv li, thaum kub nce los ntawm 50 degree, nws tus nqi tiv taus yog hais txog 119 ω (Ohms). Ntawm 100 degree, nws tus nqi tiv taus yog li ntawm 138 ω (Ohms). Nyob rau ntawm 200 degree, nws kev tawm tsam yog kwv yees li 176 ω (ohms), thiab ntawm 600 degree, nws txoj kev tawm tsam yog kwv yees li 313 ω (Ohms).
Raws li tau hais los saum toj no, Cu5 0 tus cua sov tuaj yeem muab tau los tau, qhov twg 5}}}} resist {ω resistωωω to its its its itsωω its its its its its its its်း to to to to to its်းကωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωωω- Apusion Tus Nqi Ntawm 0 Depree. Thaum nws yog ntawm -50 degree, nws tus nqi tiv taus yuav tsawg ntawm 50 ω rau 39.2 ω. Thaum nws nce los ntawm 0 Qib rau 50 degree, nws tus nqi tiv thaiv yuav nce rau 60.7 ω, thiab lwm yam. Ntawm 150 degree, nws tus nqi tiv taus yuav nce rau 82.13 ω.
Los ntawm qhov saum toj no, nws tuaj yeem pom tias ob qho kub kub thermistor thiab cu50 tus cua kub muaj ntau txoj cai loj thiab kab tawm. Thaum lawv tau muab rau ntau hom kev tswj hwm kub kom ua tiav qhov kub thiab tswj, cov nyhuv yog qhov zoo. Yog li ntawd, nws tau siv dav hauv cov khoom siv kub-precision kub xws li kev tswj hwm, txias cia, kev ntsuas kub, ntsuas kev saib xyuas, thiab lwm yam, nrog ntau yam ntawm cov ntawv thov.
Txog rau kev yooj yim ntawm txhua tus neeg siv ntau ntau los xyuas ob hom thermal resistors, pt100 thiab cu50, hauv qab no yog cov lus sib tw no rau kev tsim ob hom thermal no rau kev sib piv thiab kuaj.
