Qhov 6 feem ntau yuam kev ntawm digital multimeters
(1) Lub ntsuas hluav taws xob tsis muaj cov khoom ua ntej, xyuas seb lub roj teeb hluav taws xob puas zoo li qub lossis tsis (feem ntau siv 9V roj teeb, qhov tshiab yuav tsum ntsuas). Qhov thib ob, xyuas seb lub fuse puas tau tawg, seb qhov ntsuas hluav taws xob puas yog qhov qub, seb qhov kev txwv tam sim no puas qhib. Tom qab ntawd, xyuas seb lub rooj tsav xwm hluav taws xob puas corroded los yog luv luv, qhov tshwm sim tsis sib xws (tshwj xeeb tshaj yog lub hauv paus hluav taws xob hluav taws xob hluav taws xob), yog tias muaj, lub rooj tsav xwm Circuit Court yuav tsum tau ntxuav, thiab ua haujlwm zoo ntawm kev ziab thiab vuam kom raws sijhawm; Yog tias lub rooj tsav xwm hauv Circuit Court yog qhov qub, koj tuaj yeem ntsuas cov duab ntawm cov khoom thaiv kev sib txuas ntawm cov khoom siv hluav taws xob ntawm ob tus pins, sim seb qhov voltage puas zoo li qub? Yog tias qhov ntsuas hluav taws xob zoo li qub, qhov kev sib xyaw ua ke raug puas tsuaj, cov thaiv kev sib xyaw yuav tsum tau hloov pauv; Yog tias qhov ntsuas hluav taws xob tsis zoo li qub, kos lwm qhov tsis muaj qhov luv-circuit point? Yog tias muaj, nws yuav tsum tau ua raws sijhawm raws sijhawm; Yog hais tias tsis muaj los yog dealt nrog yog tsis zoo li qub, ces lub integrated block tau luv luv-circuited nyob rau hauv, nws yuav tsum tau hloov.
(2) resistive thaiv tsis tuaj yeem ntsuas Ua ntej ntawm tag nrho cov, xyuas qhov zoo li ntawm lub rooj tsavxwm Circuit Court, nyob rau hauv lub resistive thaiv Circuit Court, yog tsis muaj kev twb kev txuas kuj kub? Yog tias muaj, ces nws yuav tsum tau hloov tam sim ntawd; yog tias tsis yog, tom qab ntawd txhua qhov txuas txuas yuav tsum ntsuas, muaj qhov tsis zoo rau lub sijhawm hloov; Yog hais tias lub periphery yog ib txwm, ces qhov ntsuas ntawm lub integrated block puas lawm, nws yuav tsum tau hloov.
(3) voltage block nyob rau hauv kev ntsuas ntawm high-voltage zaub tus nqi yog tsis tso cai, los yog qhov ntsuas ntawm lub sij hawm ntev tso saib tus nqi yog tsis tso cai los yog txawm tsis ruaj tsis khov Feem ntau ntawm cov kev tsis ua hauj lwm no yog tshwm sim los ntawm ib los yog ob peb yam ntawm kev ua hauj lwm ntawm lub hwj chim tsis txaus. . Yog tias koj nres ntsuas ob peb vib nas this, xyuas cov khoom no pom qhov kub, uas yog vim tsis muaj lub zog thiab thermal cuam tshuam los ntawm cov khoom yuav tsum tau hloov (lossis kev sib xyaw ua ke).
(4) Tam sim no thaiv tsis tau ntsuas Feem ntau ntawm cov kev ua tsis tiav no yog tshwm sim los ntawm kev ua haujlwm tsis raug, koj tuaj yeem tshawb xyuas qhov tam sim no-txheej resistor thiab voltage-dividing resistor hlawv tawm? Yog tias hlawv, nws yuav tsum tau hloov; thiab tom qab ntawd xyuas seb cov hlau txuas nrog lub amplifier puas puas lawm? Yog tias muaj kev puas tsuaj, nws yuav tsum tau txuas dua tshiab; yog tias tsis zoo, ces hloov lub amplifier.
(5) tsis ruaj tsis khov zaub tus nqi, qhov tshwm sim ntawm dhia cov lus Kos seb tag nrho Circuit Court board ya raws los yog to phenomenon? Yog tias muaj, lub rooj tsav xwm Circuit Court yuav tsum tau muab ntxuav thiab kho kom qhuav; input Circuit Court nrog lossis tsis muaj kev sib cuag tsis zoo lossis qhov tshwm sim ntawm qhov tshwm sim (nrog rau tus cwj mem xeem), yog tias muaj, nws yuav tsum tau rov ua dua; kuaj xyuas qhov tsis zoo ntawm qhov kev tiv thaiv lossis tsuas yog tom qab qhov kev sim, tsis muaj qhov cuam tshuam ntawm qhov tshwm sim ntawm qhov tshwm sim ntawm qhov tshwm sim ntawm qhov tshwm sim ntawm qhov tshwm sim, qhov tshwm sim no yog vim qhov txo qis ntawm nws lub zog los ntawm qhov tshwm sim, yog tias muaj qhov tshwm sim no, nws yuav tsum yog. hloov nrog cov khoom siv.
(6) tso saib tus nqi tsis tso cai Qhov tshwm sim no feem ntau tshwm sim los ntawm kev ntsuas Circuit Court tsis kam lossis capacitance tsis ua haujlwm, lub capacitor lossis resistor yuav tsum tau hloov. Txheeb xyuas tus nqi tiv thaiv ntawm Circuit Court (suav nrog tus nqi tsis kam ntawm thermal teb), yog tias tus nqi hloov pauv lossis thermal teb hloov tus nqi, tus resistor yuav tsum tau hloov; xyuas qhov siv voltage Circuit Court ntawm A / D converter kuj, capacitance puas? Yog tias puas lawm, hloov lawv.
