Ib txoj kev me me ntawm kev ntsuas luv luv thiab qhib Circuit Court nrog multimeter
1. Lub multimeter ntsuas Circuit Court yog luv luv thiab qhib-circuited
Siv lub multimeter los ntsuas qhov luv luv thiab qhib Circuit Court ntawm kab: siv cov ntaub ntawv buzzer, ntsuas ntawm ob qho kawg ntawm kab, yog tias muaj suab nrov, nws txhais tau hais tias luv luv Circuit Court lossis ib txoj hauv kev (nws yuav tsum tau txiav txim raws li qhov hauv paus ntsiab lus, luv luv Circuit Court yog ib qho txhaum, thiab txoj kev yog ib txwm.), yog hais tias nws yuav tsum dhau, tsis muaj txoj kev, uas yog, lub Circuit Court yog qhib (qhib Circuit Court).
Yog hais tias nws yog ib qho qhib Circuit Court (ntxig qhov kev xeem coj mus rau hauv cov qauv hauv qab no) (kev ntsuas ntsuas), txawm nyob rau hauv qhov twg iav (tsis kam iav) nws ntsuas, nws yuav tsum tso saib "1" los qhia tias nws tau raug txiav. Ib qho qhib Circuit Court kuj yog ib qho kev sib txuas. Yog hais tias muaj ib tug luv luv Circuit Court, nws yuav tsum tau ntsuas nyob rau hauv lub resistive iav, thiab nws yuav tsum tso saib "0" los qhia tias tsis muaj kev tiv thaiv. Yog tias koj ntsuas qhov chaw ntawm 2-electrode raj, lub tswb yuav suab.
Lwm yam kev siv ntawm multimeter yog raws li nram no:
1. Kev ntsuas ntawm DC voltage
Xws li cov roj teeb, cov roj teeb, thiab lwm yam. Ua ntej ntxig cov xim dub rau hauv qhov "com", thiab cov xim liab coj mus rau qhov "V Ω". Xaiv lub pob qhov rooj rau ntau qhov loj dua li qhov kwv yees (ceeb toom: qhov tseem ceeb ntawm lub xov tooj yog qhov siab tshaj plaws, "V-" txhais tau tias DC voltage ntau, "V-" txhais tau tias AC voltage ntau, "A" txhais tau tias tam sim no ntau yam), thiab tom qab ntawd muab txuas cov kev xeem coj mus rau lub hwj huam mov lossis ob qho kawg ntawm lub roj teeb; khaws kev sib cuag ruaj khov. Tus nqi tuaj yeem nyeem ncaj qha los ntawm lub vijtsam zaub, yog tias nws tshwm sim raws li "1.", nws qhia tau tias qhov ntsuas qhov ntsuas tsawg dhau, yog li nws yuav tsum tau nce qhov ntsuas ntau ua ntej ntsuas. Yog tias "-" tshwm nyob rau sab laug ntawm tus nqi, nws txhais tau hais tias qhov polarity ntawm qhov kev xeem cov hlau lead yog qhov txawv ntawm qhov tseeb ntawm cov khoom siv fais fab. Lub sijhawm no, cov hlau kuaj liab txuas nrog rau tus ncej tsis zoo.
2. Kev ntsuas ntawm AC voltage
Kev ntsuas cov hlau lead yog tib yam li qhov ntsuas ntawm DC voltage, tab sis lub pob qhov rooj yuav tsum tig mus rau qhov xav tau ntawm AC iav "V ~". Tsis muaj qhov sib txawv ntawm qhov zoo thiab qhov tsis zoo AC voltage, thiab txoj kev ntsuas yog tib yam li ua ntej. Txawm hais tias ntsuas AC lossis DC voltage, koj yuav tsum xyuam xim rau kev nyab xeeb ntawm tus kheej, thiab tsis txhob kov cov hlau ntawm cov hlau lead ntawm koj txhais tes.
2. Kev ntsuas tam sim no
1. Kev ntsuas ntawm DC tam sim no
Ua ntej ntxig cov hmoov txhuas dub rau hauv "COM" qhov. Yog tias ntsuas qhov tam sim no ntau dua 200mA, ntxig cov hlau kuaj liab rau hauv "10A" jack thiab tig lub pob qhov rooj rau DC "10A"; Yog tias ntsuas qhov tam sim no tsawg dua 200mA, ntxig cov hlau kuaj liab rau hauv "200mA" jack thiab tig lub pob qhov rooj mus rau qhov tsim nyog nyob rau hauv DC 200mA. Thaum kho, nws yog lub sij hawm los ntsuas. Faib lub multimeter rau hauv Circuit Court, ua kom ruaj khov, thiab koj tuaj yeem nyeem tau. Yog tias nws tshwm sim li "1.", ces nce qhov ntau; yog tias "-" tshwm nyob rau sab laug ntawm tus nqi, nws txhais tau hais tias tam sim no ntws los ntawm cov xim dub coj mus rau hauv multimeter.
2. Kev ntsuas ntawm AC tam sim no
Txoj kev ntsuas yog tib yam li 1, tab sis cov iav yuav tsum tau teem rau AC iav. Tom qab qhov ntsuas tam sim no tiav lawm, tus cwj mem liab yuav tsum tau muab tso rau hauv lub qhov "VΩ". Yog tias koj tsis nco qab cov kauj ruam no thiab ntsuas qhov hluav taws xob ncaj qha, haha! Koj lub moos lossis lub zog hluav taws xob yuav "nce mus rau saum ntuj hauv cov pa taws" - muab pov tseg!
3. Kev ntsuas ntsuas
Ntxig qhov kev xeem coj mus rau hauv "COM" thiab "VΩ" qhov, tig lub pob qhov rooj mus rau qhov yuav tsum tau muaj nyob rau hauv "Ω", thiab txuas qhov kev ntsuam xyuas ua rau cov hlau qhov chaw ntawm ob qhov kawg ntawm qhov tsis kam. Thaum lub sij hawm ntsuas, koj tuaj yeem kov qhov kev tawm tsam nrog koj txhais tes, tab sis tsis txhob siv koj txhais tes tib lub sijhawm. Hu rau ob qhov kawg ntawm qhov kev tawm tsam, uas yuav cuam tshuam rau kev ntsuas qhov tseeb - tib neeg lub cev yog tus neeg xyuas pib nrog kev ua haujlwm zoo tab sis qhov loj me. Thaum nyeem ntawv, khaws cov ntawv xeem thiab cov resistor nyob rau hauv kev sib cuag zoo; xyuam xim rau chav tsev: chav tsev yog "Ω" nyob rau hauv "200", "KΩ" nyob rau hauv lub "2K" mus rau "200K", thiab lub tsev saum toj no "2M" yog "MΩ".
Plaub, qhov ntsuas ntawm diode
The digital multimeter can measure light-emitting diodes, rectifier diodes... When measuring, the position of the test leads is the same as that of the voltage measurement, turn the knob to the "-|>|{{0}}}" (tsis tuaj yeem kos lub cim no) cov ntaub ntawv; txuas tus ncej zoo ntawm lub diode nrog cov hlau kuaj liab, Txuas cov kev sim dub coj mus rau tus ncej tsis zoo, thiab lub zog hluav taws xob rau pem hauv ntej ntawm lub Lub diode yuav tshwm sim nyob rau lub sijhawm no, qhov voltage poob ntawm Schottky diode yog hais txog 0.2V, uas ntawm cov zoo tib yam silicon rectifiers (1N4000, 1N5400 series, thiab lwm yam) yog hais txog 0.7V, thiab hais tias ntawm lub teeb-emitting. diodes yog hais txog 1.8-2.3V. Hloov qhov kev xeem coj, yog tias cov zaub qhia "1.", nws yog qhov qub, vim qhov rov qab tsis kam ntawm diode loj heev, txwv tsis pub lub raj tau tawg lawm.
Tsib, qhov ntsuas ntawm triode
Qhov ntxig ntawm qhov kev xeem coj yog tib yam li saum toj no; lub hauv paus ntsiab lus yog tib yam li ntawm lub diode. Ua ntej xav tias tus pin A yog lub hauv paus, txuas tus pin nrog tus cwj mem dub, thiab kov ob tus pins nrog tus cwj mem liab; Yog hais tias ob qhov kev nyeem ntawv yog hais txog 0.7V, ces txuas tus pin nrog tus cwj mem liab, tus cwj mem dub Kov rau lwm tus pins, yog tias ob qho tib si tso saib "1", ces tus pin A yog lub hauv paus, txwv tsis pub nws yuav tsum tau rov ntsuas dua, thiab lub raj no yog PNP raj.
Yuav txiav txim li cas rau tus sau thiab emitter?
Lub ntsuas ntsuas digital tsis tuaj yeem txiav txim los ntawm lub viav vias ntawm tus taw tes zoo li lub ntsuas ntsuas ntsuas, yog li kuv yuav ua li cas? Peb tuaj yeem siv lub iav "hFE" los txiav txim: thawj zaug hloov lub iav mus rau "hFE" iav, thiab koj tuaj yeem pom tias muaj cov kab me me ntawm cov iav, uas tau muab faib ua PNP thiab NPN raj ntsuas. Lub raj hom tau raug txiav txim ua ntej, ntxig lub hauv paus rau hauv "b" qhov ntawm cov raj sib txuas, thiab ntxig rau ob txhais ceg rau hauv qhov "c" thiab "e" raws. Lub sijhawm no, tus nqi tuaj yeem nyeem tau, uas yog, tus nqi; tom qab ntawd kho lub hauv paus, thiab tus so Swap ob pins; Muab piv rau ob qhov kev nyeem ntawv, txoj hauj lwm ntawm tus pin nrog qhov loj nyeem ntawv sib raug rau saum npoo "c" thiab "e".
Tswv yim: Txoj kev saum toj no tsuas yog ncaj qha ntsuas cov raj me me xws li 9000 series. Yog tias koj xav ntsuas cov raj loj, koj tuaj yeem siv txoj kev xaim, uas yog, siv cov xaim me me los coj tawm peb tus pins. Qhov no yooj yim dua.
6. Kev ntsuas ntawm MOS field effect raj
N-channel muaj domestic 3D01, 4D01, thiab Nissan's 3SK series. Kev txiav txim siab ntawm G ncej ( rooj vag): siv cov ntaub ntawv diode ntawm multimeter. Yog hais tias qhov zoo thiab qhov tsis zoo voltage poob ntawm ib tus pin thiab lwm ob tus pins ntau dua 2V, nws yuav tso saib "1", thiab tus pin no yog kab sib chaws G. Tom qab ntawd hloov qhov kev xeem ua rau ntsuas ob txhais taw. Nyob rau hauv cov ntaub ntawv ntawm qhov hluav taws xob me me poob, cov hlau kuaj dub txuas nrog D ncej (drain), thiab cov hlau kuaj liab txuas nrog S ncej (qhov chaw).
