Dab tsi yog qhov sib txawv ntawm lub rooj sib piv "10a" thiab "20a" ntawm digital multimeter?
Qhov "10A" thiab "20A" tau cim rau ntawm qhov kev xeem coj ntawm cov digital multimeter qhia tias qhov kev xeem coj tuaj yeem nqa tus nqi siab tshaj plaws ntawm qhov ntsuas tam sim no. Tshaj qhov nominal tam sim no tus nqi yuav ua rau:
1. Cov kev xeem coj los yog lawv cov hlau lead yog rhuab thiab hlawv;
2. Cov cua kub ntawm qhov kev ntsuam xyuas ua rau cov neeg xyuas pib tsis kam hloov, uas cuam tshuam rau qhov ntsuas qhov tseeb.
Qhov no yog vim cov hlau conductors uas muaj qhov sib txawv ntawm qhov sib txawv tso cai rau cov ntsuas ntsuas sib txawv kom dhau. Nyob rau hauv cov nqe lus ntawm layman, lub thickness yog txawv, thiab qhov kev siv ntawm lub tam sim no ntws yog txawv. Piv txwv li, feem ntau siv tooj liab tub ntxhais hlau specifications yog:
Thaum qhov chaw hla ntawm cov hlau yog 1.5mm², qhov kev nyab xeeb tam sim no nqa peev xwm yog 7.5A ~ 10A;
Thaum cov hlau hla ntu ntu =2.5mm², qhov kev nyab xeeb tam sim no muaj peev xwm nqa tau yog 12.5A ~ 20A;
Yog li ntawd, nws yog ib qho tsim nyog yuav tau xaiv cov cwj mem ntawm qhov sib txawv raws li qhov xav tau ntawm kev ntsuas.
