Dab tsi yog vim li cas rau lub multimeter tsis teb rau qhov ntsuas ntawm lub capacitance?
Yog tias nws yog digital multimeter tsis teb rau lub capacitor. Ua ntej, xyuas kom tseeb tias lub iav thiab lub jack yog qhov tseeb, thiab qhov thib ob uas lub multimeter tsis tawg. Hom kev ua yuam kev qis no feem ntau tsis tawm ntawm kab. Yog hais tias lub multimeter yog qhov qub thiab lub iav yog qhov tseeb, nws feem ntau yog tias lub capacitor tsis zoo. Thaum lub capacitor puas nyob rau hauv los ntawm ib tug qhib Circuit Court (kub tawm), lub multimeter qhia xoom.
Lwm qhov ua tau yog tias thaum ntsuas lub peev xwm nrog lub multimeter, koj yuav tsum xub tso cov hluav taws xob hauv lub capacitor, txwv tsis pub cov khoom sab hauv ntawm multimeter yuav puas. Rau me me-capacity capacitor, ncaj qha luv luv ob tus pins ntawm lub capacitor tuaj yeem ua tau. Rau qhov loj-capacitors lossis cable tso tawm tsis tuaj yeem ncaj qha luv luv, txwv tsis pub cov cua sov loj uas tsim los ntawm kev luv luv yuav ua rau lub peev xwm bulging lossis txawm tawg. Txoj hauv kev kom raug yog txuas cov khoom siv hluav taws xob los yog cov khoom siv hluav taws xob mus rau ob qho kawg ntawm lub capacitor, kom cov resistor lossis cov khoom siv hluav taws xob siv hluav taws xob.
(Thaum xaiv ib qho khoom siv hluav taws xob, nws yog ib qho tseem ceeb kom ntseeg tau tias qhov ntsuas hluav taws xob ntawm cov khoom siv hluav taws xob yog siab dua li lub capacitor qhov voltage.)
Pointer multimeter
1. Yog tias koj siv lub pointer multimeter, nws muaj peev xwm xaiv qhov nres capacitance loj heev. Lub capacitance thiab tsis kam ntawm tus pointer multimeter yog ib qho thiab tib yam, qhov loj dua qhov tsis kam, qhov me dua qhov capacitance.
Kuj × 100K iav yog capacitance C × 0.1 iav; tsis kam × 1 iav yog capacitance C × 10K iav. 2.
2. Kuj tseem muaj qhov xwm txheej uas lub capacitor puas lawm. Thaum lub capacitor sab hauv qhib Circuit Court (tshem tawm), multimeter pointer yuav tsis muaj lus teb. Thaum lub capacitor nyob rau hauv luv luv-circuit (shorted), lub multimeter pointer yuav yeej ib txwm nres rov tsis kam xoom scale nyob rau hauv.
Nyob rau hauv ib txwm muaj xwm txheej nrog lub pointer multimeter capacitance ntsuas, tus pointer yuav sai sai deflected mus rau sab xis, thiab ces maj mam rov qab mus, thiab thaum kawg nres ntawm ib qho chaw. Qhov loj dua qhov capacitance, qhov loj ntawm lub kaum sab xis ntawm lub pointer mus rau sab xis; qhov zoo dua qhov zoo ntawm capacitance, tus pointer thaum kawg nres ze rau infinity. 3.
3. Kuj tseem muaj lub capacitor tsis tso tawm. Kev ntsuas lub peev xwm nrog lub pointer multimeter, txhua zaus koj yuav tsum rov ntsuas qhov xav tau rov tso tawm (luv luv). Ib txhia phooj ywg hais tias kuv tsis tso thawj zaug? Vim hais tias txhua zaus koj ntsuas lub capacitance nrog lub capacitance hom (tiam kuj hom), lub roj teeb sab hauv ntawm lub multimeter yuav them lub capacitance. Yog li txhua zaus koj yuav tsum rov ntsuas tom qab ntsuas, koj yuav tsum luv lub capacitor.
