Dab tsi yog qhov siv tau ntawm multimeter los ntsuas qhov tsis kam
Multimeter los ntsuas qhov cuam tshuam ntawm hluav taws xob thaiv.
1. Coils: 1. Ob lub xeem coj, ntsuas ob qhov kawg ntawm lub kauj, lub luag haujlwm yog txiav txim siab seb lub coil puas raug txiav. Lub buzzer yuav suab thaum nws qhib, tab sis nws yuav tsis suab thaum nws tsis yog.
2. Ib qho kev xeem cov hlau lead yog nyob rau ntawm ib kawg ntawm lub kauj, thiab lwm qhov kev xeem cov hlau lead yog tawg ntawm cov hlau hauv av, ntsuas qhov ntsuas tus nqi ntawm cov kauj mus rau hauv av, thiab txiav txim seb lub coil rwb thaiv tsev txheej puas raug hlawv.
3. Cov kev sib cuag, xws li cov neeg sib cuag tseem ceeb thiab cov neeg pab cuam ntawm cov contactors thiab nruab nrab relays. Muab qhov kev xeem coj mus rau ob qho kawg, ntsuas seb qhov kev sib cuag puas zoo, thiab txiav txim siab seb tus contactor puas yuav tsum tau hloov.
4. Diodes/transistors. Ntsuas nws qhov tsis kam, lub diode muaj unidirectional conductivity, koj tuaj yeem txiav txim qhov zoo thiab qhov tsis zoo ntawm lub diode, thiab koj tuaj yeem txiav txim siab seb lub diode puas zoo lossis phem, thiab seb nws puas rov qab tawg.
Lwm txoj haujlwm ntawm lub tshuab hluav taws xob multimeter yog ntsuas qhov ntsuas hluav taws xob ntawm lub diode. Xaiv lub iav rau hluav taws xob thaiv, thiab hloov nws los ntsuas qhov conduction voltage ntawm lub diode. Lub raj silicon yog {{0}}.7V, thiab germanium raj yog 0.3V. Txhawm rau txiav txim seb qhov zoo ntawm diode yog qhov zoo lossis qhov tsis zoo.
Nco ntsoov tias thaum ntsuas qhov tsis kam nrog lub multimeter, lub tshuab yuav tsum tsis raug them. Fais fab tuag los ntsuas qhov tsis kam.
Cov saum toj no tsuas yog siv thiab ua haujlwm ntawm multimeter hluav taws xob thaiv.
Qhov feem ntau siv yog qhov thaiv hluav taws xob.
Siv lub ntsuas hluav taws xob ntawm lub multimeter, muab ib qho kev xeem coj mus kuaj ntawm qhov chaw koj xav ntsuas, thiab lwm qhov kev sim cov hlau lead ntawm qhov taw qhia siv, feem ntau yog cov hlau hauv av lossis cov ntaub ntawv hlau, thiab ntsuas seb qhov voltage puas tau raws li qhov yuav tsum tau ua ntawm peb tsim. . Muaj 220V ntawm cov xaim nyob thiab cov xaim hauv av, thiab 220V ntawm cov hlau nyob thiab cov xaim nruab nrab. Qhov hluav taws xob ntawm cov hlau nyob thiab cov hlau nyob yog 380V. Txaus siab rau peb tus lej no txhais tau hais tias cov kab nkag los yog qhov qub.
Lub ohm iav ntawm multimeter yog cov iav siv tshaj plaws
Thaum peb kho lossis kuaj xyuas cov circuits thiab cov khoom siv, peb feem ntau siv cov ntaub ntawv ohm. Txhawm rau ua kom tiav, cov haujlwm uas nquag siv lossis siv yog raws li hauv qab no:
1. Ntsuas qhov txuas ntxiv ntawm lub voj voog, xws li kev ntsuas ntawm lub cev muaj zog coil. Hauv qhov no, ntau ntawm lawv kuj siv lub buzzer los ntsuas.
2. Ntsuas qhov tsis kam ntawm txhua lub voj voog thiab cov khoom siv los ntsuas nws lub zog thiab lwm yam tsis muaj. Piv txwv li, peb lub qhov cub hluav taws xob tuaj yeem suav nws lub zog cua sov raws li qhov ntsuas tsis kam.
3. Nws yog siv los txiav txim seb cov khoom puas zoo los yog phem. Piv txwv li, rau ib tug nti los yog ib feem, qhov ib txwm tsis kam ntawm ib tug tej yam ob pins yog 100 ohms, tab sis qhov tseeb kuj yog 1K, los yog infinite. Cov khoom yuav tsum tau tawg, xws li lub thermistor. Ntsuas qhov tsis kam ntawm ob qho kawg ntawm nws, yog tias nws tsis hloov nrog qhov kub thiab txias, ces lub thermistor yuav tsum tawg.
4. Ntsuas qhov tseeb tus nqi ntawm cov resistors hauv Circuit Court. Qee cov xim nplhaib resistors tsis tuaj yeem pom meej, thiab qhov tseeb ntawm cov xim nplhaib resistors kuj raug txheeb xyuas!
Kuj tseem nco ntsoov tias:
1. Nco ntsoov xoom lub ohm ua ntej ntsuas qhov tsis kam ntawm ohm iav ntawm pointer multimeter, thiab tom qab ntawd kho qhov xoom thaum hloov lub iav txoj hauj lwm. Rau cov digital multimeter, koj yuav tsum tau them sai sai rau cov hlau tsis kam ntawm cov hlau lead, tshwj xeeb tshaj yog thaum cov kab hlau tsis zoo ntawm cov kab hluav taws xob loj heev (feem ntau 0.2 txog)
2. Thaum ntsuas qhov kev tiv thaiv tus nqi ntawm Wu tivthaiv ntawm lub rooj tsavxwm Circuit Court, nws raug nquahu kom txiav ib ko taw rau kev ntsuas, yog li nws yuav tsis cuam tshuam los ntawm Circuit Court thiab cov ntaub ntawv ntsuas yuav raug.
