Yuav ua li cas siv multimeter los ntsuas qhov zoo ntawm lub rooj tsav xwm hauv Circuit Court?
Ntxiv nrog rau kev ntsuas qhov ntsuas qhov ntsuas qhov tsis kam, lub multimeter tuaj yeem ntsuas qhov DC voltage. Txawm tias cov yam ntxwv tseem ceeb ntawm transistors thiab capacitance ntawm capacitors tuaj yeem ntsuas los ntawm qee qhov multimeters. Nkag siab txog kev siv multimeters kom zoo tshaj plaws ntawm koj lub peev xwm yog ib qho tseem ceeb tshaj plaws hauv kev siv tshuab hluav taws xob. Digital thiab pointer multimeters yog ob hom multimeters.
Lub taub hau ' meter ' yog qhov tseem ceeb ntawm tus pointer multimeter, uas yog ib qho khoom siv ntsuas ntau yam. Tus pointer ntawm lub taub hau meter nyeem tus nqi ntsuas. Cov kua siv lead ua kua ntawm cov digital multimeter ncaj qha qhia qhov ntsuas tus nqi hauv daim ntawv digital, ua kom yooj yim nyeem. Qee cov qauv kuj muaj lub suab nrov xaiv. Multimeter yog ib hom 'meter' nrog lub taub hau uas nyob hauv ohmmeter, ammeter, thiab voltmeter.
Lub multimeter's DC tam sim no cov ntaub ntawv yog ntau hom DC voltmeter. Los ntawm kev txuas lub kaw-circuit voltage faib resistor nyob rau hauv parallel nrog lub 'meter' lub taub hau, qhov voltage ntau yuav nce. Lub multimeter's DC voltage cov ntaub ntawv yog ntau ntau DC voltmeter. Lub 'meter' lub taub hau qhov hluav taws xob ntau tuaj yeem nce ntxiv los ntawm kev sib txuas cov hluav taws xob faib hluav taws xob sib txuas nrog nws. Qhov sib thooj ntsuas qhov sib txawv ntawm ntau yam voltage faib cov resistors sib txawv.
1. Offline nrhiav tau
Txhua tus IC nti tus pin qhov tsis kam rau hauv av, ob qho tib si zoo thiab tsis zoo, yuav tsum ntsuas. Txhawm rau txheeb xyuas qhov teeb meem, muab piv nrog IC nti uas txhim khu kev qha.
2. Kev tshawb nrhiav hauv online
DC tsis kam yog kuaj pom siv tib cov txheej txheem raws li kev tshawb nrhiav offline. Tab sis nco ntsoov: Qhov hluav taws xob sab hauv ntawm multimeter yuav tsum tsis txhob siab dua 6V txhawm rau txhawm rau txiav lub hwj chim ntawm lub rooj tsav xwm Circuit Court uas yuav raug kuaj. Xav txog qhov cuam tshuam ntawm qhov periphery thaum ntsuas.
3. AC ua hauj lwm voltage xeem txoj kev
Txhawm rau kom tau txais qhov kwv yees tus nqi ntawm AC voltage ntawm IC, siv multimeter nrog cov ntaub ntawv dB. A 0.1-0.5F kev rho tawm DC capacitor tuaj yeem muab tso rau hauv cov khoom siv nrog cov ntawv xeem zoo yog tias tsis muaj dB cov ntaub ntawv. Txoj hauv kev no yog qhov tsim nyog rau ICs uas ua haujlwm ntawm qhov tsawg zaus. Cov ntaub ntawv ntsuas yog kwv yees vim tias cov cim qhia no yuav cuam tshuam los ntawm ntuj zaus thiab waveform, yog li nws yuav tsum tau sau tseg.
4. Tag nrho txoj kev ntsuas tam sim no
Los ntawm kev ntsuas tag nrho tam sim no ntawm IC fais fab mov, qhov zoo ntawm IC tuaj yeem txiav txim siab. Txij li feem ntau ntawm cov ICs yog DC-coupled, thaum lub IC puas lawm (xws li PN junction breakdown los yog qhib Circuit Court), nws yuav ua rau cov theem tom ntej yuav saturated thiab txiav tawm, thiab tag nrho cov tam sim no yuav hloov. Yog li ntawd, kev ntsuas tag nrho tam sim no tuaj yeem txiav txim siab seb IC puas zoo lossis phem. Qhov voltage ntawm lub voj tsis kam yog ntsuas hauv online, thiab tus nqi tam sim no tuaj yeem suav tau.
