Vim li cas tus nqi hluav taws xob tso tawm tsis raug thaum lub multimeter ntsuas 2400hz voltage?
Ua ntej tshaj plaws, peb yuav tsum nkag siab txog qhov txiaj ntsig zoo ntawm tus nqi ntsuas multimeter. Peb niaj hnub siv multimeters suav nrog pointer multimeters thiab digital multimeters. Pointer multimeters muaj AC voltage ntau ntawm 10v txog 1000v thiab qhov ntsuas qhov tsawg kawg nkaus ntawm 0.2v. Saib ntawm daim duab schematic, cov ntaub ntawv AC voltage yog ib qho yooj yim rectification circuit tsim rau 50Hz (60Hz hauv Tebchaws Meskas thiab Nyiv) AC voltage test. Internal circuit muaj xws li rectifier diodes yam tsis xav txog cov yam ntxwv siab. Yog hais tias qhov ntsuas lub teeb liab zaus tshaj 1KHz, nws yuav tsis raug tso cai.
Sab hauv ntawm digital multimeter yog IC rau kev ntsuas. Nws tsis muaj txiaj ntsig ntau los tso tawm daim duab schematic. Cov yam ntxwv siab zaus ntawm cov ntaub ntawv AC voltage muaj feem xyuam nrog lub bandwidth ntawm IC's operational amplifier (OP) thiab IC's AD conversion rate. Yuav muaj ntau cov ntsiab lus los qhia meej cov kev txwv, yog li cia peb hais txog tam sim no.
Yog tias peb xav kom raug kuaj cov teeb liab hauv 2.4KHz zaus band, peb yuav tsum siv lub suab millivolt meter. Cov cuab yeej no yog ib qho cuab yeej siv rau kev ntsuas suab. Nws siv los ua hom pointer, tab sis tam sim no nws yog digital.
Yuav ua li cas kho Multimeter
Txoj kev kho ntawm tus pointer multimeter yog raws li hauv qab no: 1: Yog hais tias lub multimeter puas vim yog yuam kev tsoo lub iav tsis ncaj ncees lawm, feem ntau koj tuaj yeem tshawb xyuas seb lub fuse hauv multimeter puas tau tawg. Yog tias nws tawg, tsuas yog hloov nws. Yog tias nws tsis tawg, nws yog qhov teeb meem hauv Circuit Court. Feem ntau, nws raug kho zoo li no: thawj zaug tig ntawm lub multimeter, teem lub iav rau lub iav koj hlawv tawm, thiab tom qab ntawd xyuas seb qhov kev tiv thaiv ntawm lub iav puas puas. Yog tias nws puas lawm, cia li hloov nws. [Vim cov resistors nyob rau hauv lub multimeter yog tag nrho cov uas tsis yog-tus qauv resistors, thiab lawv yog tag nrho cov high-precision resistors nrog 5 xim rings, nws yog ib qhov nyuaj rau yuav, koj muaj peev xwm siv tus txheej txheem ntawm series thiab parallel kom tau raws li qhov yuav tsum tau ua hauj lwm tus nqi], Yog hais tias nws tsis zoo, nws yog feem ntau Lub 'meter' lub taub hau raug puas los ntawm overload.
