Qhov taw qhia ntawm multimeter DC tam sim no yog qhov qub thaum qhov ntau me me, thiab tsis muaj qhov qhia tias qhov ntau npaum li cas. Kho qhov txhaum
Yog vim li cas: Lub shunt resistor nrog ntau yam loj (500mA, 1A) yog luv luv. Qhov no yog vim qhov ntev-ntev shunt resistor ua haujlwm nyob rau hauv lub xeev siab tam sim no ntev, ua rau lub rwb thaiv tsev txheej ntawm cov hlau tsis kam ntawm shunt resistor hlawv tawm. Tsis tas li ntawd, kev ua haujlwm yuam kev kuj tseem yuav ua rau lub shunt hlawv tawm, piv txwv li, thaum ntsuas AC voltage, qhov kev xaiv ntau yam hloov pauv ntawm multimeter yog yuam kev rau DC tam sim no iav.
Kho: Hloov cov hlawv tawm shunt resistor. Yog tias koj tsis muaj daim duab thaiv ntawm tes. Kuv tsis paub tus nqi tsis kam ntawm qhov hluav taws kub resistor. Ob lub xov hlau tuaj yeem rub tawm los ntawm ob lub pob qij txha ntawm cov khoom siv puas thiab txuas nrog cov khoom siv hluav taws xob ntawm Z × 21 hom DC tsis kam lub thawv. Kho cov nyees khawm ntawm lub thawv tiv thaiv kom txog thaum lub 'meter' qhia qhov qub. Sau tus nqi ntawm lub thawv tiv thaiv, tus nqi no yog tus nqi tiv thaiv ntawm shunt resistor uas tau hlawv tawm. Amateur electronic hobbyists feem ntau tsis muaj tus nqi Z × 21 DC tsis kam. Lub sijhawm no, lub tshuab hluav taws xob digital lossis multimeter uas muaj qhov siab dua tuaj yeem siv los ntsuas qhov kub hnyiab tawm shunt resistor. Txij li thaum lub shunt resistor feem ntau yog ua los ntawm manganese steel hlau, kom tsis txhob muaj kev nyeem ntawv tsis raug tshwm sim los ntawm luv luv Circuit Court tshwm sim los ntawm kev kub hnyiab ntawm lub ntsuas hluav taws xob, cov hlau tsis kam ntawm shunt resistor tuaj yeem raug tshem tawm, ncab thiab muab tso rau ntawm ib qho insulating. board los yog qhuav ntsuas ntawm lub desktop. Tau kawg, yog tias muaj ib daim duab qhia txog multimeter Circuit Court, koj tuaj yeem paub qhov luaj li cas ntawm tus nqi tiv thaiv los ntawm kev sab laj kab kos duab.
