Vim li cas thiaj tsis muaj lus teb thaum ntsuas capacitance nrog multimeter?
Yog hais tias lub multimeter digital ntsuas qhov capacitance, tsis muaj lus teb. Ua ntej, xyuas kom meej tias lub iav txoj hauj lwm thiab lub jack yog lawm, thiab thib ob, lub multimeter tsis tawg. Hom kev ua yuam kev qis no feem ntau tsis tawm mus. Yog hais tias lub multimeter zoo li qub thiab cov kev teeb tsa raug, ces tus capacitor feem ntau yuav tawg. Thaum lub capacitor puas sab hauv vim yog qhov qhib Circuit Court (kub tawm), multimeter qhia xoom.
Lwm qhov ua tau yog tias thaum siv multimeter los ntsuas lub peev xwm, cov hluav taws xob hauv lub capacitor yuav tsum raug tso tawm ua ntej, txwv tsis pub cov khoom sab hauv ntawm multimeter yuav puas. Rau me me-capacity capacitor, tsuas yog luv luv ntawm ob tus pins ntawm lub capacitor. Tsis txhob ncaj qha luv luv-circuit loj-capacity capacitors lossis cables thaum lawv tawm, txwv tsis pub cov cua sov loj uas tsim los ntawm luv luv yuav ua rau lub capacitor bulge los yog tawg. Txoj hauv kev kom raug yog txuas lub resistor lossis cov cuab yeej hluav taws xob mus rau ob qho kawg ntawm lub capacitor thiab cia cov resistor lossis cov cuab yeej hluav taws xob siv lub zog.
(Thaum xaiv cov khoom siv hluav taws xob, koj yuav tsum xyuas kom meej tias qhov ntsuas hluav taws xob ntawm cov khoom siv hluav taws xob siab tshaj qhov hluav taws xob capacitor.)
pointer multimeter
1. Yog tias koj siv analog multimeter, nws muaj peev xwm hais tias lub capacitor ntau dhau lawm. Kev teeb tsa capacitance thiab taw tes tsis kam teeb tsa ntawm analog multimeter yog kev koom ua ke. Qhov loj dua qhov kev teeb tsa tsis kam, qhov me dua qhov kev teeb tsa capacitance.
2. Lwm qhov xwm txheej yog tias lub capacitor puas lawm. Thaum lub capacitor nyob sab hauv qhib-circuited (txiav), lub multimeter pointer yuav tsis muaj lus teb. Thaum lub capacitor nyob rau hauv luv luv-circuited (short-circuited), lub multimeter pointer yuav ib txwm nres ntawm lub xoom cim ntawm tus resistor.
Nyob rau hauv ib txwm muaj xwm txheej, thaum siv lub pointer multimeter los ntsuas capacitance, tus pointer yuav deflect mus rau sab xis sai, ces maj mam txav rov qab, thiab thaum kawg nres ntawm ib qho chaw. Qhov loj dua lub peev xwm capacitor, qhov loj dua lub pointer deflection lub kaum sab xis mus rau sab xis; qhov zoo dua lub capacitor zoo, qhov ze ntawm tus pointer qhov kawg nres txoj hauj lwm yog infinity.
3. Lwm qhov teeb meem yog tias lub capacitor tsis tso tawm. Siv lub pointer multimeter los ntsuas qhov capacitance. Txhua zaus koj yuav tsum rov ntsuas lub capacitance, koj yuav tsum rov tso tawm (luv luv rau nws). Ib txhia phooj ywg hais tias kuv tso kuv hluav taws xob thawj zaug, puas yog? Vim hais tias txhua zaus koj siv qhov kev teeb tsa capacitance (qhov tseeb qhov kev teeb tsa tsis kam) los ntsuas qhov capacitance, lub roj teeb hauv lub multimeter yuav them tus nqi capacitance. Yog li ntawd, lub capacitor yuav tsum tau luv luv-circuited txhua lub sij hawm qhov ntsuas yuav tsum tau rov ntsuas dua.
