Kev txiav txim siab tseem ceeb rau kev ntsuas qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas
Dab tsi yog txoj kev tshawb nrhiav rau cov resistors? Nws yuav suab yooj yim, tab sis nws tsis yooj yim li ntawd. Ntxiv nrog rau kev ua haujlwm kom raug, nws tseem ceeb heev uas yuav tsum tau ua tib zoo saib qee cov ntsiab lus me me. Txhawm rau ua kom yooj yim rau txhua tus neeg ua haujlwm, tus editor tau sau qee cov ntaub ntawv rau kev siv:
1. Roughly kwv yees tus nqi ntawm cov resistor raws li nws cov xim nplhaib lossis tus nqi nominal.
2. Muab qhov kev sojntsuam ntawm lub multimeter ntawm ob qhov kawg ntawm cov resistor thiab ntsuas R1.
3. Yog tias koj muaj cov kev xav tau siab rau cov txiaj ntsig kev xeem, koj tuaj yeem hloov qhov kev sojntsuam thiab ntsuas rov qab, thiab qhov tshwm sim yuav yog R2.
4. Yog hais tias R1=R2 thiab R1, R2 nyob ze rau tus nqi nominal ntawm tus resistor, nws qhia tau hais tias tus resistor yog ib txwm; Yog tias R1 thiab R2 ntau dua li tus nqi nominal, nws tuaj yeem txiav txim siab tias tus resistor puas lawm; Yog hais tias qhov tsis kam yog ze rau 0 ohms, nws qhia tau hais tias tus resistor qhib. Raws li ib txwm muaj, cov txiaj ntsig kev xeem yuav tsum zoo ib yam. Yog tias ob qhov kev xeem tau sib txawv, cov laj thawj yuav tsum raug txheeb xyuas.
Nco tseg:
1. Kev npaj ua ntej ntsuas nrog lub multimeter.
Pointer multimeter: Ntxig qhov kev sojntsuam rau hauv qhov sib txuas sojntsuam thiab tig qhov hloov mus rau qhov sib thooj ohm txoj haujlwm; Luv luv Circuit Court ob lub probes thiab xyuas seb tus pointer taw qhia rau xoom txoj hauj lwm ntawm ohm iav. Yog tias tsis yog, kho nws siv lub ohm iav xoom pob qhov rooj.
Digital multimeter: Ntxig qhov kev sojntsuam mus rau hauv lub qhov (socket) thiab tig qhov hloov pauv mus rau qhov sib thooj ohm; Qhib lub hwj chim, luv -circuit qhov kev sojntsuam, thiab saib yog tias lub vijtsam zaub qhia xoom; Yog tias nws tsis yog xoom, tus lej no yuav tsum tau muab rho tawm ntawm qhov ntsuas ntsuas, raws li qhia hauv daim duab.
2. Cov resistors nrog qhov sib txawv kuj tseem ceeb yuav tsum tau ntsuas los ntawm kev siv lub zog sib txawv. Thaum ntsuas nrog lub pointer multimeter, feem ntau, resistors hauv qab 50Q Ω siv R * 1 iav, resistors ntawm 50-1000K Ω siv Rx10K iav, resistors ntawm 1-500k Ω siv R * 1K iav, thiab resistors saum 500k Ω siv R * 10k iav. Thaum lub pointer multimeter yog xoom, nws yuav tsum tau rov pib dua rau txhua lub iav hloov. Rau ib qho digital multimeter, yog tias kev nyeem ntawv tsis yog xoom tom qab qhov kev sojntsuam luv luv, tus lej no yuav tsum tau muab rho tawm thaum kawg ntawm kev ntsuas.
3. Thaum kuaj, tshwj xeeb tshaj yog thaum ntsuas cov resistors nrog kaum ntawm kiloohms lossis ntau dua, ceev faj tsis txhob kov cov khoom siv hluav taws xob ntawm cov tshuaj ntsuam xyuas thiab cov resistors nrog koj txhais tes. Vim tias tib neeg lub cev muaj qee qhov kev tiv thaiv, nws yuav muaj qee yam cuam tshuam rau cov txiaj ntsig kev xeem, ua rau cov ntawv nyeem me me.
4. Yog tias qhov ntsuas ntsuas tau nruab rau hauv Circuit Court, nws raug nquahu kom solder nws tawm ntawm Circuit Court, yam tsawg kawg yog los ntawm soldering nws?! Ib qho kawg los tiv thaiv lwm cov khoom hauv Circuit Court los ntawm kev cuam tshuam cov txiaj ntsig kev xeem thiab ua rau kev ntsuas tsis raug.
5. Yog tias muaj oxidation ntawm cov hlau lead kawg ntawm cov resistor, cov oxide txheej yuav tsum tau muab tshem tawm ua ntej ntsuas.
