Lub hauv paus ntsiab lus thiab cov cai rau cov khoom siv multimeter on-off
Yuav luag tag nrho cov multimeters muaj ib qho kev ntsuas kev ntsuas uas siv los txiav txim siab seb kab yog nyob rau lossis tawm (luv luv luv). Lub buzzer thiab LED teeb yog feem ntau ua haujlwm. Thaum lub voj voog txuas, lub buzzer lossis LED teeb yuav qhib. Lub multimeter's on / off gear yog qhia los ntawm kos npe rau hauv lub thawv liab hauv daim duab.
Lub hauv paus ntsiab lus ntawm on-off iav
Lub tshuab hluav taws xob sab hauv tau qhib thaum lub multimeter tau teeb tsa rau ntawm qhov chaw qhib. Cov hlau lead kuaj dub txuas nrog lub roj teeb sab hauv lub cev tsis zoo, cov ncej zoo txuas nrog lub resistor nrog qhov tsis muaj zog, thiab lwm qhov kawg ntawm cov resistor txuas nrog cov hlau kuaj liab. Lub resistor muab lub teeb liab ua rau lub hauv paus chirping circuit. Qhov voltage ntawm tus trigger resistor nyob rau hauv lub 'meter' yog siab yog hais tias ob lub xeem leads yog luv luv ua ke los yog lawv cov kuj tsis tshua muaj, uas ua rau lub beep yuav tsum tau activated.Yog hais tias qhov kev tiv thaiv ntawm ob lub xeem leads yog loj, ces qhov sib faib voltage. internal trigger resistor txuas nrog hauv series yog me me, thiab lub beep tsis tuaj yeem tshwm sim.
On-off iav standard
Raws li cov ntsiab lus dav dav, conductivity txhais tau tias yog 80 ohms lossis tsawg dua; txwv tsis pub, nws yog non-conductivity. Hauv lwm lo lus, koom nrog multimeter qhov kev xeem liab thiab dub ua rau kab ob kawg. Lub multimeter yuav ua suab nrov thiab ntseeg tias txoj kab ua haujlwm yog tias qhov kev tiv thaiv tsawg dua 80 ohms.
