Vim li cas cov digital multimeter ua kom beeping?
1. Puas yog lub multimeter hlawv? Koj tuaj yeem tshawb xyuas seb nws puas zoo li qub los ntawm kev ntsuas lub roj teeb zoo tib yam, xws li lub roj teeb thib 5 lossis lub roj teeb thib 7, nrog cov ntaub ntawv DC voltage.
2. Yog hais tias qhov ntsuas DC voltage yog qhov qub, nws tuaj yeem txiav txim siab tias tsis muaj teeb meem nrog lub meter taub hau ntawm multimeter. Nws yuav tsum yog tias cov khoom tiv thaiv lossis nti sab hauv raug puas tsuaj tom qab lub tshuab hluav taws xob siab tau ntsuas qhov yuam kev nrog lub buzzer iav!
Yog tias nws yog qhov kawg, tsuav yog cov khoom siv ntawm lub buzzer Circuit Court raug kuaj xyuas, feem ntau cov neeg uas muaj kev paub txog kev kho yuav kho tau. Yog hais tias nws yog cov ntaub ntawv qub, nws yog qhov zoo tshaj los kho nws rau warranty.
Nyob rau hauv rooj plaub tom kawg, qhov tseem ceeb ntawm kev kuaj xyuas yog diodes (los ntsuas seb lawv puas tawg lossis qhib), ua haujlwm amplifier ICs (raws li lub hauv paus rau seb lub buzzer yog beeping los yog tsis, multimeters dav siv TL062, LM358, lossis LM2904 thiab lwm cov qauv). , hloov nws nrog tib tus qauv)
Yog hais tias tus nqi kuj tsawg heev, nws yuav ring. Cov ntaub ntawv no tsuas yog siv rau kev ntsuas txuas ntxiv. Lub ringing yeej ua pov thawj tias lub voj voog txuas nrog. Yog hais tias ob lub xeem coj ncaj qha luv luv thiab qhov kev xeem tsis suab (tus nqi kuj yuav luag xoom), nws kwv yees tias lub buzzer tawg.
Cov ntaub ntawv buzzer ntawm digital multimeter feem ntau yog siv los txiav txim siab sai sai seb lub Circuit Court yog nyob rau lossis tawm. Lub buzzer yuav beep thaum qhov ntsuas yog nyob rau. Lub beeping kuj yog feem ntau tsawg dua 30 ~ 50 ohms, thiab qhov tsawg kawg nkaus kuj ntawm ntau hom ntawm digital multimeters txawv.
