Multimeter ntawm kev txiav txim siab ntawm cov khoom siv hluav taws xob zoo thiab tsis zoo
Lub rooj tsav xwm ua tiav muaj cov khoom siv hluav taws xob ntau, vim muaj ntau yam tsis paub meej, cov khoom puas feem ntau tshwm sim. Thaum cov khoom siv tsis ua haujlwm yog tshwm sim los ntawm feem ntau ntawm cov khoom puas tsuaj, tom qab ntawd kev tshawb nrhiav thiab kho cov khoom siv yog qhov tseem ceeb heev, yuav ua li cas txiav txim siab qhov zoo ntawm cov khoom yog ib tus engineer yuav tsum kawm cov txuj ci.
Feem ntau nyob rau hauv kev saib xyuas ntawm thawj zaug txiav txim lub rectifier choj tus pin electrode, kev pom ib leeg tsis muaj peev xwm txiav txim, tab sis kuj tsis muaj kev pov hwm txaus.
Nyob rau hauv kev txiav txim ntawm lub rectifier choj tus pin electrode, peb tuaj yeem siv lub multimeter rau Po pab. R × 1K iav lub xeev, nrog tus cwj mem dub ntawm lub multimeter kov ib qho ntawm tus choj pawg ntawm tus pins, tus cwj mem liab yog sim rau lwm tus pins. Lub sijhawm no, yog tias lub ntsuas ntsuas ntsuas qhov ntsuas tsis kawg, nws tuaj yeem txiav txim siab tias tus cwj mem dub kov tus pin rau qhov tso tawm ntawm tus choj pawg zoo ncej, yog tias cov zaub ntau ntawm 4K-10K ohms, ces, tus cwj mem dub kov tus pin rau tus ncej tsis zoo, tus cwj mem liab thiab xim dub qhov zoo thiab qhov tsis zoo, qhov seem ntawm tus pins yog AC input.
Lub teeb-emitting digital raj feem ntau yog tsim los qhia cov lej, tab sis nws tau siv dav heev. Yog li, nyob rau hauv cov txheej txheem overhaul, yuav ua li cas los txiav txim seb lub teeb-emitting digital raj puas puas?
Ib yam li ntawd, koj tseem tuaj yeem siv multimeter los kuaj xyuas cov ntaub ntawv R × 10K thiab R × 100K. Ua ntej siv lub qhov ntswg liab nrog lub raj digital "hauv av" txhuas qhov kawg kov, thaum tus cwj mem dub ntsuas nyob rau hauv lem lwm cov hlau lead kawg, yog tias qhov kev ntsuam xyuas tau tshwm sim rau txhua ntu ntawm lub teeb pom kev zoo, ces cov raj digital tsis zoo; yog tias ib qho ntawm cov ntu tsis teeb, ces lub raj digital tau puas lawm.
Thaum txiav txim lub potentiometer, koj yuav tsum xub ntsuas qhov nominal tsis kam ntawm potentiometer. Yuav ua li cas ntsuas lub nominal tsis kam ntawm lub potentiometer?
Kev ntsuas ntawm nominal tsis kam ntawm potentiometer
Kho qhov tsis kam ntawm multimeter iav, qhov "2" kawg raws li kev sib cuag ntawm lub xov tooj ntawm tes, ohm cov ntaub ntawv yog tias tus taw tes tsis txav, tus nqi kuj tsis txav, lub potentiometer puas lawm. Tom qab ntsuas lub potentiometer txav caj npab nrog kev sib cuag ntawm cov khoom tiv thaiv seb puas muaj teeb meem. Koj tuaj yeem siv lub multimeter ohm iav "1, 2" los yog "2, 3" kawg ntawm lub resistor ncej counterclockwise tig mus rau ze ntawm "tawm" txoj hauj lwm, uas yog, qhov tsawg tshaj plaws kuj, ces maj mam tig lub ncej nyob rau hauv lub clockwise kev taw qhia, qhov kev tiv thaiv maj mam ua loj dua, thaum lub ncej nce mus txog qhov txwv txoj hauj lwm, tus nqi kuj yuav tsum zoo ib yam li tus nqi nominal ntawm potentiometer.
Lub luag haujlwm tseem ceeb ntawm crystal oscillator nyob rau hauv Circuit Court board
Crystal oscillator, tseem hu ua crystal oscillator, yog cov khoom siv hluav taws xob ua los ntawm quartz. Crystal oscillator tseem hu ua quartz oscillator, siv los ua ib qho tseem ceeb ntawm lub moos Circuit Court, tab sis kuj tseem siv computer network phaib, graphics phaib thiab motherboards thiab lwm yam khoom siv, lub benchmark zaus muab kev pab.
Hauv kev tshawb pom ntawm cov siv lead ua oscillator yog lub sijhawm, thawj zaug nrog cov ntaub ntawv multimeter R × 10K txhawm rau txheeb xyuas tus nqi tsis kam ntawm cov siv lead ua oscillator. Yog tias qhov kev kuaj pom tau yog infinity, nws txhais tau hais tias cov siv lead ua tsis tshwm sim luv luv thiab qhov tshwm sim to. Tom qab kuaj qhov tsis kam yog qhov qub, nrog rau tus cwj mem ntsuas tso rau hauv lub qhov (socket), thiab tuav ib qho ntawm tus pins nrog koj tus ntiv tes, lwm tus pin yog kov tus cwj mem rau saum cov hlau, xws li tus cwj mem xeem yog ci. (neon npuas), ces cov siv lead ua oscillator tsis zoo. Ntawm qhov tsis sib xws, cov siv lead ua tau raug puas tsuaj.
