Yuav ua li cas ntsuas qhov tsis kam siv qhov kev tiv thaiv ntau ntawm digital multimeter
Hauv kev ntsuas hluav taws xob tiv thaiv kev tiv thaiv, qhov kev tiv thaiv qhov tseem ceeb sib txawv, los ntawm ob peb milliohms (mΩ) ntawm kev tiv thaiv kev tiv thaiv mus rau billions ohms ntawm rwb thaiv tsev tsis kam.
Ntau qhov kev ntsuas digital ntsuas qhov ntsuas me me li 0.1 ohm, thiab qee qhov kev ntsuas tuaj yeem siab txog 300 megohms (300,000,000ohms).
Rau qhov kev tiv thaiv loj heev, Fluke multimeter yuav tso saib "OL", qhia tias qhov kev tiv thaiv raug ntsuas tshaj qhov ntau. Thaum ntsuas qhov qhib Circuit Court, "OL" yuav tshwm sim.
Kev tiv thaiv yuav tsum tau ntsuas nrog lub zog hluav taws xob kaw, txwv tsis pub lub ntsuas hluav taws xob lossis hluav taws xob hluav taws xob yuav puas. Qee qhov digital multimeters muab kev tiv thaiv thaum lub teeb liab hluav taws xob tsis raug txuas nrog hauv hom resistive. Cov qauv sib txawv ntawm digital multimeters muaj peev xwm tiv thaiv sib txawv.
Thaum ua qhov ntsuas qhov tseeb ntawm qhov tsis muaj zog, qhov tsis kam ntawm cov hlau ntsuas yuav tsum tau muab rho tawm ntawm tus nqi ntsuas. Cov kev sim tshuaj tiv thaiv kab mob sib txawv ntawm {{0}}.2Ω txog 0.5Ω. Yog tias qhov kev tiv thaiv ntawm cov hlau lead yog ntau dua 1Ω, cov hlau lead yuav tsum tau hloov.
Ib qho digital multimeter tuaj yeem ntsuas qhov tsis kam ntawm lub rooj tsav xwm hauv Circuit Court uas cais los ntawm diode lossis semiconductor yog tias nws muab qhov hluav taws xob DC tsawg dua 0.6V rau qhov ntsuas qhov ntsuas. Qhov no tso cai rau kev sim tsis tau tshem tawm cov resistor.
Cov kauj ruam los ntsuas kev tiv thaiv online:
1. Tua lub zog hluav taws xob;
2. Xaiv qhov thaiv hluav taws xob;
3. Ntxig cov hmoov lead kuaj dub rau hauv COM jack thiab cov ntawv xeem liab coj mus rau hauv qhov kev xeem jack;
4. Txuas cov kev ntsuam xyuas cov hlau lead mus rau ob qhov kawg ntawm cov khoom siv lossis cov khoom siv hluav taws xob hauv kev sim;
5. Saib ntawm kev nyeem ntawv thiab ua tib zoo saib seb lub tsev puas yog ohms (Ω), kiloohms (kΩ), lossis megaohms (MΩ).
Nco tseg: 1,000Ω=1KΩ, 1,000,000Ω=1MΩ.
CEEB TOOM: Tua lub zog thaum kuaj cov resistors.
