Cov yam ntxwv ntawm cov digital multimeter thiab yuav ua li cas rau kev lag luam lub vaj huam sib luag
Ib qho digital pulcim animeter yog cov digital me me ntawm cov digital uas muaj peb thiab ib nrab lej lej LCD. Nws tuaj yeem ntsuas AC thiab DC voltage, AC thiab DC tam sim no, kev nyab xeeb, Diode conduction voltage, thiab circuit Court coaccuit coccuit co. Kev ntsuas kev ua haujlwm thiab ntau yam tau hloov los ntawm kev sib hloov band hloov, nrog tag nrho ntawm 30 qib.
Qhov kawg ntawm cov zaub muaj txiaj ntsig ntawm qhov no ntau nplua mias yog ± 1999, uas tuaj yeem tso saib "0" thiab polarity. Thaum overloaded, nws qhia tawm "1" lossis "-1". Thaum lub roj teeb hluav taws xob yog tsawg dhau, nws qhia txog "←" cim. Lub buzzer yog siv rau kev kuaj xyuas luv luv ntawm kev kuaj xyuas.
Cov yam ntxwv kev siv ntawm cov digital motalimeter
1. Ntsuas ntau yam
⑴ AC thiab DC voltage (AC zaus xws li ntawm 45Hz txog 500z);
Kev ntsuas kev ntsuas yog 2 {{{4 {}} 0MV, 2V, 20000, nrog rau ACT qhov tseeb ntawm ± (1% {8} {8 cov lus ntawm kev nyeem ntawv);
Cov lus tawm tswv yim yog 10M ω hauv DC hom thiab 10m ω thiab 100pF hauv AC hom.
⑵ AC thiab DC kurents
Kev ntsuas kev ntsuas yog 2 {8}} 0} {{}, nrog ACT, nrog rau ACCE) thiab 10% {9} {}} cov lus ntawm kev nyeem ntawv). Qhov nyiaj siab kawg thauj khoom yog 250mv (AC rms) .⑶ kuj:
Qhov ntau tau muab faib ua rau qib (6) {0 0 ω, 2k ω, 20m ω, thiab 20m ω. Qhov tseeb yog ± (2.0% ntawm kev nyeem {{}} cov lus).
⑷ Diode conduction voltage:
Qhov ntau yog {{{{0}}}. 5V, thiab qhov kev xeem tam sim no thiab kev sim tam sim no thiab 1MA 0.5MA.
Nrhiav tau ntawm kev hloov chaw beta tus nqi:
Cov xwm txheej kuaj yog: VCE=2.8v, ib=10.
⑹ Qhov Kev Tshawb Xyuas Tsawg:
Kuaj kab ke<20 Ω± 10 Ω 2. Sampling time: TS＝0.4S.
