Yuav txiav txim seb qhov ntsuas kub ntawm qhov ntsuas kub yog qhov zoo lossis qhov tsis zoo los ntawm kev siv multimeter
Niaj hnub no, cov tshuab hluav taws xob ua dej kub tau nkag mus rau tib neeg lub tsev thiab tau dhau los ua ib qho ntawm cov khoom siv tseem ceeb hauv tsev. Qhov ntsuas kub ntawm lub rhaub dej yog qhov ntsuas qhov ntsuas tseem ceeb kom tau txais cov dej kub nruab nrab. Yog tias qhov ntsuas kub tau raug puas, qhov ntsuas kub ntawm cov dej nruab nrab ntsuas tsis tuaj yeem raug thiab raws sijhawm, ua rau lub tshuab hluav taws xob dej tsis tuaj yeem tswj tau qhov kub thiab txias.
Cov ntsuas kub uas siv hauv cov tshuab hluav taws xob hluav taws xob feem ntau suav nrog cov thermistor kub sensors thiab platinum thermal resistance kub sensors. Lawv tso tawm cov teeb liab tsis kam mus rau qhov ntsuas ntsuas ntsuas thib ob. Ntawm lawv, cov thermistor feem ntau siv hauv cov tshuab hluav taws xob hluav taws xob yog lub thermistor kub sensor nrog qhov ntsuas kub tsis zoo. Raws li qhov kub nce, nws cov zis tsis kam ua me me. Cov zis ntawm platinum thermal resistor yuav loj dua thaum kub nce.
Multimeter los ntsuas qhov zoo ntawm NTC thermistor
Muab lub rhaub dej kub qhov ntsuas kub ntawm chav tsev kub. Txuas ob qhov kev xeem coj ntawm digital multimeter mus rau ob tus pins ntawm lub thermistor los ntsuas nws qhov kev tiv thaiv tiag tiag. Tom qab ntawd sib piv qhov ntsuas qhov tseeb tiv thaiv nrog lub nominal resistance. Yog hais tias qhov sib txawv ntawm qhov tseeb tsis kam thiab lub nominal kuj yog ± 2 ohms, nws yog suav hais tias yog ib txwm. Ntawm qhov tsis sib xws, qhov kev ua tau zoo ntawm lub thermistor kub sensor ua phem los yog puas. Koj tuaj yeem ua kom sov lub thermistor rau kev sim thiab siv lub teeb kom sov nws. Qhov tsis kam ntawm multimeter ua me me raws li qhov kub thiab txias, uas txhais tau hais tias qhov ntsuas kub ntawm lub thermistor yog qhov qub. Yog tias qhov kev tiv thaiv tsis hloov, nws txhais tau hais tias lub thermistor kub sensor puas.
Siv lub multimeter los ntsuas qhov zoo ntawm platinum thermal kuj kub sensor
Txij li thaum lub platinum thermal resistance kub sensor muaj peb cov hlau lead, nrhiav seb cov hlau twg muaj xim txawv thiab siv ib qho ntawm cov multimeter coj los txuas rau nws. Lwm qhov kev xeem coj mus kuaj yog txuas nrog ob txoj hauv kev ntxiv. Ntsuas qhov ntsuas qhov ntsuas sib cais. Yog tias tus nqi tiv thaiv tau pom tias tsis muaj qhov kawg lossis qis dua 100 ohms tom qab ntsuas ua khub, nws txhais tau tias platinum thermal resistor puas lawm. Yog tias qhov tseem ceeb ntawm qhov kev tiv thaiv txawv tom qab ob qhov kev ntsuas, nws txhais tau tias muaj teeb meem nrog cov kab nyiaj them los yog nws cov hlau lead ntawm platinum thermal resistor. Nyob rau tib lub sijhawm, koj tuaj yeem ua kom sov lub platinum thermal resistor. Yog hais tias tus nqi kuj tsis hloov, nws txhais tau hais tias lub platinum thermal resistor puas lawm. Yog hais tias qhov ntsuas qhov tseeb ntawm qhov tsis kam yog qhov sib txawv ntawm tus nqi nominal tsis kam, nws qhia tau tias kev ua haujlwm ntawm platinum thermal resistor yog deteriorating.
Yog li ntawd, yog tias lub rhaub hluav taws xob xav tswj qhov kub kom zoo, nws qhov ntsuas kub yog qhov tseem ceeb heev. Yog tias qhov ntsuas kub tsis ua haujlwm, qhov ntsuas kub ntawm lub tshuab hluav taws xob tsis tuaj yeem tau txais cov teeb liab tiv thaiv los ntawm qhov ntsuas kub, yog li qhov ntsuas kub tsis ua haujlwm. Txawm hais tias qhov ntsuas kub ntawm qhov ntsuas kub tau teeb tsa li cas, nws tswj tsis tau. Vim tias muaj plaub qhov txuas hauv qhov kev tswj hwm kaw, qhov ntsuas kub tsis zoo yog qhov kev kuaj pom thiab kis tau tus mob, yog li yog tias muaj teeb meem nrog cov ntsuas ntsuas hauv qhov txuas no, qhov ntsuas kub yuav tsis tuaj yeem tswj tau lawm.
Qhov ntsuas kub ntsuas yog qhov sib txawv ntawm cov resistor tswj los ntawm qhov kub thiab txias. Nws tuaj yeem ntsuas nrog 100K tsis kam. Yog hais tias nws yog ib tug sensor nrog ib tug tsis zoo kub coefficient, lub kuj yuav txo thaum lub sensor yog rhuab. Yog tias nws qhib tag, tsis tas yuav ntsuas nws. Nws yog twv yuav raug hu Nws tawg. Yog tias qhov ntsuas kub ntawm qhov ntsuas qhov ntsuas kub ib feem ntawm lub sensor hloov tab sis qhov ntsuas qhov ntsuas tsis hloov, kuj tseem muaj teeb meem!
Siv multimeter nrog qhov tsis kam ntawm 1KΩ los ntsuas qhov ntsuas tus nqi ntawm ob txhais ceg (nco ntsoov tias koj txhais tes yuav tsum tsis txhob kov lub raj resistor). Tom qab ntawd, rub tus resistor nws tus kheej nrog koj txhais tes kom pom tias tus nqi kuj maj mam nce. Yog tias nws nce qeeb, nws yog qhov zoo. Yog hais tias luv luv Circuit Court, qhib Circuit Court los yog tsis tu ncua txhais tau tias nws yog phem. Tus nqi tshwj xeeb kuj tsis tas yuav zoo ib yam li tus nqi thermistor xaiv los ntawm hom, yog li nws yuav tsum tau ua raws li qhov tseeb ntsuas.
Siv qhov chaw ohm ntawm multimeter los ntsuas qhov ntsuas kub, thiab tom qab ntawd ua kom sov nrog koj txhais tes. Yog tias qhov hloov pauv hloov, nws yog qhov zoo. Yog tias tus nqi tiv thaiv tsis hloov lossis tsis muaj tus nqi tiv thaiv, nws yog qhov phem.
