Cov txheej txheem rau Kev Ntsuas Diode Polarity thiab Kev Kho Mob nrog Multimeter
Lub hauv paus ntsiab lus tshawb pom: Raws li unidirectional conductivity ntawm diodes, diodes nrog kev ua tau zoo muaj qhov tsis zoo rau pem hauv ntej thiab siab thim rov qab; Qhov ntau dua qhov sib txawv ntawm ob qhov txiaj ntsig no, qhov zoo dua. Yog tias lawv zoo sib xws, nws qhia tau hais tias kev ua haujlwm ntawm lub diode tsis zoo lossis raug puas tsuaj.
Thaum ntsuas, xaiv qhov "ohm" ntau yam ntawm multimeter. Feem ntau, siv R x100 lossis R xlk iav hloov Rx1 lossis R x10k iav. Vim tias tam sim no hauv Rxl hom siab dhau lawm, nws yooj yim rau hlawv tawm lub diode, thiab qhov hluav taws xob sab hauv hauv R xlok hom siab dhau lawm, uas yooj yim rau kev tawg ntawm diode.
Kev ntsuas txoj kev: Txuas ob lub meter bar rau ob lub electrodes ntawm lub diode thiab nyeem cov ntsuas ntsuas tus nqi; Tom qab ntawd hloov cov 'meter' tuav thiab ntsuas dua, ua tib zoo saib ntawm tus nqi tiv thaiv thib ob. Yog tias muaj qhov sib txawv tseem ceeb ntawm kev ua haujlwm ntawm ob lub sijhawm, nws qhia tau tias lub diode muaj kev ua haujlwm zoo; Thiab raws li txoj kev sib txuas ntawm lub meter pas nrig nrog qhov ntsuas qis tshaj plaws (xa mus rau kev sib txuas rau pem hauv ntej), nws tau txiav txim siab tias qhov zoo ntawm lub diode txuas nrog lub pas nrig dub thiab qhov tsis zoo ntawm lub diode txuas nrog lub pas nrig liab. Vim hais tias tus ncej zoo ntawm cov khoom siv hluav taws xob sab hauv ntawm multimeter txuas nrog "-" lub qhov (socket) ntawm multimeter, thiab tus ncej tsis zoo ntawm lub hwj chim sab hauv yog txuas nrog "+" qhov (socket) ntawm multimeter.
Yog tias qhov ntsuas qhov ntsuas ob zaug yog ob qho me me, nws qhia tau hais tias lub diode tau tawg lawm; Yog tias qhov ntsuas qhov ntsuas ob zaug yog ob qho tib si siab heev, nws qhia tau hais tias lub diode twb tawg lawm sab hauv; Yog tias qhov ntsuas qhov ntsuas ob zaug tsis sib txawv, nws qhia tias qhov ua haujlwm tsis zoo ntawm lub diode. Hauv cov xwm txheej no, lub diode tsis tuaj yeem siv.
Nws yuav tsum tau muab sau tseg tias vim lub nonlinear volt ampere yam ntxwv ntawm diodes, qhov sib txawv kuj tseem ceeb yuav tau txais thaum ntsuas qhov tsis kam ntawm diodes nrog sib txawv kuj theem ntawm ib tug multimeter; Hauv kev siv tiag tiag, qhov tam sim no ntws los ntawm diode yuav loj dua, yog li tus nqi tsis kam qhia los ntawm diode yuav tsawg dua.
