Lub buzzer ntawm lub multimeter los ntsuas qhov tsis kam yog qhov zoo lossis tsis zoo
Thaum kho cov hluav taws xob hauv hluav taws xob, qee zaum yuav tsum ntsuas qhov qhib thiab tawm ntawm lub voj voog, xws li fuses, cov kab ntawv tooj liab ntawm PCB, thiab kev sib raug zoo ntawm cov nti thiab nws cov khoom siv peripheral. Qhov no yuav tsum tau ib tug multimeter los ntsuas, tshwj xeeb tshaj yog thaum koj tsis paub nyob rau hauv ib tug heev integrated circuit board, nws yog heev yooj yim mus siv ib tug multimeter los ntsuas kev sib raug zoo ntawm ntau yam Cheebtsam. Muaj lub diode buzzer txoj hauj lwm ntawm cov digital multimeter, uas yog qhov zoo heev rau kev ntsuas qhov txuas ntxiv ntawm kab.
Diode buzzer ntawm multimeter
Muaj ib lub iav ntawm lub tshuab hluav taws xob digital hu ua diode buzzer iav, uas tuaj yeem kuaj lub on-off ntawm lub diode, thiab cov iav no tuaj yeem kuaj tus nqi zaub thaum lub diode yog on-off. Thaum peb teeb tsa lub iav mus rau qhov diode buzzing txoj hauj lwm, thaum cov hlau kuaj liab yog nyob rau hauv kev sib cuag nrog tus ncej zoo ntawm lub diode, thiab cov dub xeem lead yog nyob rau hauv kev sib cuag nrog tus ncej tsis zoo ntawm lub diode, lub multimeter yuav tsum tso saib rau pem hauv ntej conduction. voltage poob ntawm lub diode nyob rau lub sijhawm no. Tus nqi ntawm yuav tsum yog 696, raws li qhia hauv daim duab hauv qab no. Tus lej 696 tsis sawv cev rau qhov tsis kam ntawm lub diode, nws tsuas yog txhais tau hais tias qhov kev poob qis ntawm qhov ntsuas diode yog li 6.9V, thiab nws cov khoom yog silicon. Yog hais tias cov khoom germanium diode yog ntsuas, qhov tso tawm tus nqi yuav tsum yog li ntawm 247, vim hais tias lub pem hauv ntej voltage poob ntawm germanium khoom diode yog hais txog 0.2V.
Thaum qhov kev xeem coj tau hloov thiab ntsuas dua, lo lus "1" yuav tsum tau muab tso tawm rau ntawm sab laug ntawm cov khoom siv digital multimeter, uas txhais tau hais tias qhov rov qab tsis kam ntawm diode yog infinite. Thaum peb ntsuas seb lub Circuit Court yog qhib lossis kaw, peb feem ntau siv lub diode buzzer iav kom yooj yim. Thaum tus nqi tsis kam ntawm ob lub ntsiab lus tsawg dua 90 ohms mus rau 50 ohms, lub buzzer yuav ua lub suab ntev, uas txhais tau hais tias lub Circuit Court tau qhib. Feem ntau, cov iav no tsis yog siv los ntsuas qhov tsis kam ntawm cov resistor.
Yuav ua li cas ntsuas kev tiv thaiv ntawm Circuit Court board nrog multimeter
Thaum ntsuas qhov tsis kam nrog lub multimeter, koj yuav tsum siv cov ntaub ntawv tiv thaiv. Thaum ntsuas, ceev faj tsis txhob ntsuas qhov tsis kam thaum nws raug them. Yog hais tias nws yog ib tug pointer multimeter ntsuas, koj yuav tsum tau ua ohm xoom hloov ntawm lub multimeter. Thaum ntsuas qhov kev tiv thaiv ntawm lub rooj tsav xwm hauv Circuit Court, txhawm rau kom tsis txhob qhia tus nqi tiv thaiv ntawm lwm cov ceg thiab ua rau kev ntsuas loj, peb ib txwm tshem tawm ib qho kawg ntawm qhov tsis kam thiab ntsuas nws.
