Multimeter classification thiab ib feem muaj pes tsawg leeg taw qhia
1. Raws li txoj kev tso saib, nws muab faib ua:
1. Pointer multimeter;
2. Digital multimeter;
Thib ob, raws li kev hloov pauv ntau yam:
1. Kev tuav ntau yam (MAN RANGZ);
2. Nws pib ntau yam (AUTO RANGZ);
3. Tsis siv neeg / phau ntawv ntau yam (AUTO / MAN RANGZ);
3. Raws li kev ua haujlwm, kev siv thiab tus nqi, nws tuaj yeem muab faib ua:
1. Tsawg-kawg digital multimeter (tseem hu ua nrov digital multimeter);
2. Mid-range digital multimeter;
3. Medium / high-end digital multimeter;
4. Digital/analog hybrid ntsuas;
5. Cov cuab yeej nrog dual zaub ntawm cov duab digital / analog;
6. Multi-purpose oscilloscope (kev koom ua ke kinetic zog xws li digital multi-meter thiab digital storage oscilloscope).
ntsuas kab
Kev ntsuas hluav taws xob yog ib lub voj voog siv los hloov ntau yam khoom ntsuas mus rau hauv DC tam sim no me me haum rau kev ntsuas ntsuas. Nws yog tsim los ntawm resistors, semiconductor Cheebtsam thiab roj teeb. Nws tuaj yeem hloov pauv ntau yam khoom ntsuas (xws li tam sim no, voltage, tsis kam, thiab lwm yam), ntau yam sib txawv, los ntawm kev ua haujlwm ntau yam (xws li rectification, shunt, voltage division, thiab lwm yam) sib sau ua ke rau qee qhov me me DC tam sim no xa mus rau lub 'meter' rau kev ntsuas.
hloov pauv hloov
Nws txoj haujlwm yog xaiv cov kab ntsuas ntau yam kom tau raws li qhov yuav tsum tau ntsuas ntawm ntau hom thiab ntau yam. Feem ntau, muaj ob qhov hloov pauv hloov, cim nrog ntau txoj haujlwm thiab ntau yam.
Test leads thiab kuaj lead jacks
Cov thawj coj kuaj tau muab faib ua liab thiab dub. Thaum siv, ntxig cov hlau kuaj liab rau hauv lub jack cim nrog " ", thiab ntxig cov hlau lead dub rau hauv lub jack cim nrog "-".
Multimeter cim lub ntsiab lus
1. ∽ txhais tias AC, -- txhais tau tias DC;
2. V-2.5KV 4000Ω/V txhais tau tias rau AC voltage thiab 2.5KV DC voltage thaiv, qhov rhiab heev yog 4000Ω/V;
3. A－V－Ω txhais tau hais tias tam sim no, voltage thiab kuj ntsuas tau;
4. 45-65-1000Hz txhais tau hais tias qhov kev khiav hauj lwm zaus yog qis dua 1000Hz, thiab tus qauv muaj zaus ntau yog 45-65Hz;
5. 2000Ω / V DC txhais tau hais tias qhov rhiab heev ntawm DC thaiv yog 2000Ω / V.
