Kev siv ntawm ntau yam kev ua haujlwm ntawm kev sib ntxiv
Qhov feem ntau dav siv Resistor block
Cov iav tsis kam tiv taus los ntsuas cov nqi tiv thaiv, thiab txiav txim siab cov khoom siv tsis kam ntawm cov lej sib txawv.
Ua ntej siv tus taw tes multimeter, nws yog qhov tsim nyog yuav tsum xoom nws. Circuit Cocuit Court thib ob, thiab tus pointer yuav hloov mus rau sab xis. Kho lub Pest potentiometer kom lub pointer ntsiab lus rau lub xoom cim ntawm sab xis. Yog tias xoom hloov kho tsis tau thiab RX1 rau RX1K siv, nws qhia tau tias 1.5v roj teeb yog tsawg; Thaum siv RX10k hom, nws qhia tau tias lub 9v lossis 12V stacked roj teeb muaj lub zog tsis txaus.
1. Kev Xaiv Ntau
Lub OHM nplai yog cim nrog ω, nrog xoom ntawm sab xis thiab nce qhov tseem ceeb rau sab laug. Cov nplai yog teem rau hauv qhov tsis - lineear txawv, thiab ntu nruab nrab ua rau muaj tseeb. Tom qab hloov cov khoom siv resistor, nws yuav tsum tau xoom kom ntseeg tau qhov tseeb.
Tom qab paub txog tus nqi tiv, xaiv cov khoom haum tsim nyog thiab kho nws kom xoom. Lub hauv paus ntsiab lus ntawm kev xaiv cov nyiaj tsim nyog yog los ua kom ntsuas tus nqi ntsuas tus nqi ze li sai tau rau nruab nrab txoj hauj lwm ntawm lub hu. Yog tias cov kev tiv thaiv yog 10 ω, xaiv RX1 hom. Yog tias qhov tsis kam yog 220 ω, xaiv RX10 hom. Yog tias qhov tsis kam yog 4.7k ω, xaiv RX100 hom. Yog tias qhov tsis kam yog 68K ω, xaiv RX1k lossis RX10k hom. Tso cov kev sojntsuam ntawm ob lub pins ntawm lub resistor yuav tsum tau kuaj, nyeem cov nqi uas tau sau tseg ntawm cov qib uas kom tau txais tus nqi tiv thaiv ntawm lub resistor.
Yog tias cov digital motimeter yog siv, qhov ze dua ntawm cov ntsuas ntsuas ntsuas yog rau qhov ntau ntawm cov iav ntawd, qhov ntau dua qhov tshwm sim yuav yog. Ib qho 150 ω resistor tuaj yeem ntsuas tau siv ob lub RX200 thiab Rx2K, tab sis cov txiaj ntsig tau ntau dua yog qhov tseeb dua.
2. Kev ntsuas tsheb
Feem ntau ntawm kev saib xyuas yuav tsum ntsuas cov nqi tiv taus ncaj qha rau ntawm Circuit Court Board ua ntej. Vim hais tias muaj lwm yam kev sib xyaw ntawm lwm daim duab thiab cov khoom siv sib txuas thaum lub sijhawm ntsuas kev khiav, yuav muaj kev sib txawv hauv kev ntsuas ntsuas. Feem ntau, nws yog qhov tsim nyog yuav tsum ntsuas qhov kev sojntsuam ob zaug thiab nqa ib qho nrog cov ntsuas ntau dua kev tiv thaiv tus nqi. Yog tias muaj 82k ω resistor (saib Daim Duab 2) raug ntsuas thiab cov txiaj ntsig yog tsawg dua li tus nqi nominal nrog qhov sib txawv me me, nws qhia tau tias lub resistor yog li qub. Yog hais tias ntsuas tus nqi yog ntau dua qhov tseeb tsis kam nqi, nws yuav yog vim muaj kev nce ntxiv; Yog tias ntsuas tus nqi tiv thaiv yog qhov tsawg heev, xws li tsis muaj cov khoom sib txuas me, cov pins yuav tsum tau soldered lossis cov khoom siv yuav tsum tau muab tshem tawm ua ntej ntsuas.
