Kev txheeb xyuas qhov yuam kev tam sim no tshwm sim los ntawm kev piav qhia ntxaws ntawm ammeter qauv
Lub ammeter yog ib qho khoom siv ntsuas tam sim no, thiab qhov kev nyeem ntawv yog amperes. Muaj ob hom ammeter qauv: shunt ammeter thiab tawm tswv yim ammeter.
1, shunt thiab tawm tswv yim ammeter
Shunt ammeter yog ib hom ntawv thiab siv ntau zaus. Cov lus teb ammeter yog qhov tsim nyog rau kev ntsuas me me tam sim no. Nrog rau tam sim no yog me me thiab me me, daim ntawv thov kev tawm tswv yim ammeter yog nce zuj zus. Txawm li cas los xij, qhov kev xaiv ntawm qhov tseeb ammeter nyob ntawm qhov loj ntawm qhov ntsuas tam sim no, tab sis kuj nyob ntawm tus yam ntxwv (feem ntau impedance) ntawm cov cuab yeej hauv kev sim (DUT).
2. shunt ammeter: DMMs
Feem ntau shunt ammeters yog siv nyob rau hauv yuav luag tag nrho cov digital multimeters (DMMs). Qhov voltage tsim los ntawm qhov ntsuas tam sim no ntawm qhov kev tawm tsam ntawm qhov kawg ntawm cov khoom siv multimeter yog proportional rau qhov ntsuas tam sim no.
3. Lub nra hnyav
Qhov chaw nres nkoj voltage ntawm ammeter yog hu ua Voltage Borden. Raws li lub ammeter txuas nrog hauv cov voj voog tam sim no los ntsuas, lub nra voltage yuav ua rau qhov ntsuas tam sim no txo qis, yog li lub ammeter tsis tuaj yeem cuam tshuam qhov ntsuas tam sim no.
Ib qho ammeter zoo tshaj plaws yuav tsum tsis muaj kev cuam tshuam rau tam sim no hauv lub voj voog tam sim no, yog li nws yuav tsum muaj xoom input impedance thiab xoom voltage load. Tab sis qhov tseeb ammeter yuav tsim ib lub nra hnyav. Feem ntau hais lus, qhov kev ntsuas qhov yuam kev tshwm sim los ntawm lub nra voltage ntawm ammeter yog sib npaug ntawm qhov hluav taws xob hluav taws xob faib los ntawm cov khoom siv hluav taws xob nyob rau hauv kev sim. Lub nra voltage tsim los ntawm ib tug raug ammeter yog nyob rau hauv qhov kev txiav txim ntawm pua pua ntawm millivolts.
4. Cov lus teb ammeter
Piv nrog rau hom shunt, lub tswv yim ammeter ze dua rau qhov zoo tshaj plaws ammeter, yog li qhov ammeter no yuav tsum raug xaiv thaum ntsuas qhov tam sim no hauv qab microampere, lossis thaum lub input impedance xav tau tshwj xeeb.
