Lub hauv paus ntsiab lus thiab cov qauv ntawm Multimeter on/off Range
On/off range yog hom kev ntsuas uas yuav luag tag nrho cov multimeters muaj, siv los ntsuas qhov txuas ntxiv (luv luv) ntawm ib lub voj voog. Feem ntau, nws yuav ua ke nrog lub buzzer thiab LED teeb. Lub buzzer yuav suab los yog lub teeb LED yuav teeb, qhia tias lub Circuit Court yog conductive. Raws li pom nyob rau hauv daim duab, lub cim nyob rau hauv lub thawv liab sawv cev rau lub on/off ntau yam ntawm lub multimeter.
On/off gear txoj cai
Thaum lub multimeter tau teeb tsa rau ntawm qhov chaw qhib / tawm, lub voj voog sab hauv uas txuas nrog yog: cov hlau lead dub txuas nrog cov ncej tsis zoo ntawm lub roj teeb sab hauv, cov ncej zoo ntawm lub roj teeb txuas nrog qhov tsis kam nrog tus nqi me me. , thiab lwm qhov kawg ntawm qhov kev tiv thaiv yog txuas nrog cov hlau lead liab. Internal beeping circuit tau txais lub teeb liab los ntawm tus resistor. Yog hais tias ob lub probes luv luv Circuit Court los yog qhov tsis kam ntawm lawv me me, ces qhov voltage ntawm lub triggering resistor nyob rau hauv lub 'meter' yog siab dua, ua rau ib tug beep. Yog hais tias qhov kev tawm tsam ntawm ob qhov kev sojntsuam loj, ces qhov ib nrab ntawm qhov hluav taws xob sab hauv triggering resistor hauv series yog me me thiab tsis tuaj yeem ua rau lub suab nrov.
On/off gear standard
Lub ntsiab txhais yog tias 80 ohms los yog tsawg dua yog conduction, txwv tsis pub nws tsis yog conduction. Uas yog hais, txuas cov liab thiab dub sojntsuam ntawm lub multimeter ntawm ob sab ntawm ib lub voj voog. Yog tias tus nqi tiv thaiv ntawm qhov hluav taws xob no tsawg dua 80 ohms, lub multimeter yuav ua suab nrov thiab ntseeg tias qhov hluav taws xob hluav taws xob no yog hluav taws xob.
Dab tsi yog qhov txawv ntawm megohmmeter thiab multimeter?
1. Cov qauv sib txawv:
Ib lub megohmmeter muaj qhov nruab nrab mus rau qhov loj sib xyaw ua ke. Qhov ntsuas no muaj lub zog tso zis siab, siab luv luv-circuit tam sim no tus nqi, thiab ntau qhov tso zis voltage ntau ntau (txhua tus qauv muaj plaub theem voltage).
Lub multimeter muaj peb qhov tseem ceeb: lub taub hau meter, ntsuas Circuit Court, thiab hloov pauv hloov.
2. Lub hauv paus ntsiab lus ua haujlwm txawv:
Ib lub megohmmeter siv qhov hluav taws xob los txhawb lub cuab yeej lossis lub network hauv kev sim, thiab tom qab ntawd ntsuas qhov tam sim no tsim los ntawm kev ua kom zoo siab, siv Ohm txoj cai los ntsuas qhov tsis kam.
Lub hauv paus ntsiab lus ntawm multimeter yog siv lub rhiab magnetoelectric direct tam sim no meter (microampere meter) raws li lub taub hau meter. Thaum ib qho me me tam sim no dhau los ntawm lub taub hau meter, yuav muaj qhov qhia tam sim no.
3. Ntau qhov kev siv:
Megohmmeter yog ib qho cuab yeej siv thiab tseem ceeb rau kev lag luam kev lag luam hauv hluav taws xob, xa ntawv thiab kev sib txuas lus, kev sib txuas lus, kev teeb tsa hluav taws xob thiab kev saib xyuas, nrog rau kev siv hluav taws xob ua hluav taws xob los yog lub zog. Nws yog qhov tsim nyog rau kev ntsuas qhov tseem ceeb ntawm cov khoom siv rwb thaiv tsev thiab cov rwb thaiv tsev tiv thaiv ntawm transformers, motors, cables, thiab cov khoom siv hluav taws xob.
Lub multimeter tsis tsuas yog siv los ntsuas qhov tsis kam ntawm cov khoom ntsuas, tab sis kuj ntsuas AC thiab DC voltage. Qee qhov multimeters tuaj yeem ntsuas qhov tseem ceeb ntawm cov transistors thiab lub peev xwm ntawm capacitors.
