Lub hauv paus ntsiab lus ntawm kev ntsuas tam sim no ntawm MF47 pointer multimeter yog dab tsi
MF47- hom pointer multimeter, vim yog cov qauv yooj yim, cov duab compact, ntau nta, thiab sai sai hloov qhov tseem ceeb MF500-hom multimeter. Tam sim no, lub ntiaj teb no ntawm digital multimeter, tab sis kev xaiv ntawm MF47 hom multimeter los yog cov neeg me nyob rau hauv.
Qhov tseem ceeb ntawm lub pointer multimeter yog lub taub hau. Lub taub hau yog qhov ntau ntawm 50 microamps ntawm siab rhiab heev DC ammeter. Txawm hais tias nws yog ntsuas tam sim no, voltage, tsis kam lossis lwm yam ntsuas, nws yog los ntawm cov khoom siv hluav taws xob peripheral, qhov ntsuas tau hloov mus rau hauv lub zog hluav taws xob teeb liab uas tuaj yeem ua rau lub ntsuas lub taub hau ntws los ntawm 0 ~ 50 microamps, hauv lub taub hau 'meter' los kos lub cim. coj tus nqi los nyeem tus nqi ntsuas.
Lub peripheral circuit tsis tsuas yog muaj kev hloov pauv, tab sis kuj yuav tsum muaj kev tiv thaiv kev ua haujlwm. Tab sis kev tiv thaiv muaj nuj nqi tsis txaus thiab tsis zoo txaus. Txhawm rau tiv thaiv lub hauv paus ntsiab lus 'meter' lub taub hau, thawj qhov kev txi yog lub peripheral circuit nws tus kheej. Feem ntau nws yog cov precision resistor uas hlawv tawm. Ua-nws-koj tus kheej cov phooj ywg, koj tuaj yeem hloov qhov resistor raws li tus nqi tseem ceeb, lub multimeter tuaj yeem siv dua!
MF47- hom pointer multimeter, yog ib daim ntawm rhiab heev DC20KΩ / V, AC9KΩ / V ntsuas ntsuas.
MF47 pointer multimeter yog DC tam sim no tuaj yeem ntsuas ① 0 ~ 0.05mA ~ 0.5mA ~ 5mA ~ 50mA ~ 500mA ntxiv rau qhov txuas ntxiv DCA5A lossis 10A.
② MF47 nws DC DCV 0 ~ 0.25V ~ 1V ~ 2.5V ~ 10V ~ 50V ~ 250V ~ 500V ~ 1000V, ntxiv rau ntxiv ob lub koob phaw 6.75MΩ resistor, DC voltage tuaj yeem ntsuas 2500 V.
③ MF47 AC voltage cov ntaub ntawv muaj 10V ~ 50V ~ 250V ~ 500V ~ 1000V, txuas 2500V thiab DC voltage ntau ob 6.75MΩ resistors.
④ MF47 nws DC tiv thaiv thaiv R × 1Ω, R × 10Ω, Rx100Ω, R × 1KΩ, Rx10KΩ. Nov yog cov lus piav qhia luv luv ntawm MF47 multimeter voltage ntawm tag nrho cov nplai ntawm ob sab ntawm ntau npaum li cas? Cov neeg siv ceev faj tau pom nyob rau hauv lub kaum sab xis ntawm lub multimeter, yog cim nrog ib tug parameter (DC20KΩ / V), muaj ib tug tag nrho scale ntawm lub rooj, ntws los ntawm lub ammeter lub taub hau ntawm lub ua hauj lwm tam sim no ntawm 46.2 uA. Raws li Ohm txoj cai I=U/R tuaj yeem suav tau, lub taub hau ntawm qhov ntsuas kev ua haujlwm ntawm U=I × R=0.0000462 × 20kΩ=0.924V ntsuas voltage.
Qhov ntawd yog hais tias, thaum ntsuas tam sim no, qhov loj dua qhov nres, qhov me me ntawm qhov tsis kam ntawm shunt resistor yog khi, kom ntseeg tau tias qhov siab tshaj plaws tam sim no los ntawm shunt resistor, shunt resistor ntawm ob sab ntawm qhov siab tshaj qhov poob. tsis tshaj qhov ntsuas input voltage ntawm lub taub hau {{0}}.924V ua. Kuv tau cim ob qho kev qhia ntawm kev ntsuas DC tam sim no hauv daim duab saum toj no, raws li tus neeg nug tau hais tias, siv lub multimeter los ntsuas qhov luv-circuit tam sim no ntawm lub roj teeb, lub fuse hlawv tawm, tom qab hloov, lub iav tam sim no tseem ntsuas tsis tau. qhov tam sim no. Ntawm no yog ib qho kev qhia meej, Kuv tsis paub ntau npaum li cas koj ntsuas nrog DCA cov ntaub ntawv, koj tuaj yeem txiav txim siab qhov twg mus rau DC tam sim no cov ntaub ntawv ntawm tus resistor tau hlawv tawm ib qho. Kuv tsuas siv tau txoj kev tshem tawm los piav qhia. DC10 iav yog ib qho 0.075Ω siab-lub zog resistor, nws tsis koom nrog kev ntsuas, yog li nws tsis tuaj yeem raug puas tsuaj. Tom qab ntawd lub 500mA iav sib xws rau shunt tsis kam ntawm 0.456Ω, 50mA iav sib haum rau shunt tsis kam ntawm 4.56Ω, 5mA iav sib haum rau qhov tsis kam ntawm 45.6Ω, kawg 0.05mA sib haum rau qhov tsis kam ntawm 456Ω. Koj tuaj yeem qhib lub nraub qaum ntawm lub multimeter, yuav ntau dua ib lub pob khawm hu rau DC tam sim no iav kom tau txais kev ceev faj siv cov multimeter los kuaj xyuas cov shunt resistors, feem ntau rau koj! Thaum lub sij hawm ntawd, qhov ntsuas ntawm lub dialed iav muaj kev sib raug zoo, los xyuas kom meej tias koj ib tug check ib qhov tseeb.
