Digital multimeter technical nta thiab yuav ua li cas siv lub vaj huam sib luag
Cov multimeter yog ib qho me me digital multimeter nrog peb thiab ib nrab tus lej LCD zaub. Nws tuaj yeem ntsuas AC thiab DC qhov hluav taws xob thiab AC thiab DC tam sim no, tsis kam, qhov muaj peev xwm, transistor -value, diode ntawm voltage thiab Circuit Court luv, thiab lwm yam, los ntawm kev hloov pauv hloov pauv hloov pauv kev ua haujlwm thiab ntau yam kev ntsuas, tag nrho ntawm 30 lub zog .
Qhov siab tshaj plaws zaub tus nqi ntawm no multimeter yog ± 1999, nws tuaj yeem tso saib "0" thiab polarity, thiab tso saib "1" lossis "-1" thaum overloaded, thiab tso saib "1" lossis "{{ 5}}" thaum lub roj teeb voltage tsawg dhau. Thaum lub roj teeb voltage tsawg dhau, nws qhia "←" kos npe, thiab luv-circuit check nrog buzzer.
Digital multimeter technical yam ntxwv
1. Kev ntsuas ntau
(1) AC thiab DC voltage (AC zaus ntawm 45Hz ~ 500Hz);
Ntau yam yog 200mV, 2V, 20V thiab 1000 tsib, DC qhov tseeb ntawm ± (0.8% ntawm kev nyeem + 2 cov lus) hauv qab no, AC qhov tseeb ntawm ± (1% ntawm kev nyeem ntawv {{8}) } lus);
Input impedance, DC qib rau 10MΩ, AC qib rau 10MΩ, 100PF.
(2) AC thiab DC tam sim no
Ntau yam yog 200μA, 2mA, 200mA thiab 10A tsib, DC qhov tseeb ntawm ± (1.2% ntawm kev nyeem + 2 lo lus), AC qhov tseeb ntawm ± (2.0% ntawm kev nyeem ntawv + 5 lus), qhov siab tshaj plaws voltage load ntawm 250mV (AC RMS).
(3) tsis kam:
Qhov ntau yog: 200Ω, 2kΩ, 200kΩ, 20MΩ thiab 20MΩ rau qib. Qhov tseeb yog ± (2.0% ntawm kev nyeem + 3 lo lus).
(4) diode conduction voltage:
Qhov ntau yog {{0}} txog 1.5V, thiab qhov ntsuas tam sim no yog 1mA± 0.5mA.
(5) Triode tus nqi kuaj:
Test tej yam kev mob yog: VCE=2.8V, IB=10μA.
(6) Kev kuaj xyuas luv luv:
Test Circuit Court kuj<20Ω±10Ω 2. Sampling time: TS = 0.4S.
Vaj huam sib luag thiab cov lus qhia ua haujlwm
1. Zaub
Peb thiab ib nrab tus lej ntawm cov kua siv lead ua kua
2. Fais fab hloov
Nias, ces qhib lub hwj chim, thaum tsis siv yuav tsum muab tua.
3. Kev ntsuas lub qhov (socket) capacitance
Kev ntsuas capacitance, tus pin capacitance rau hauv lub qhov (socket).
4. Muaj nuj nqi hloov pauv
Xaiv cov kev ntsuas sib txawv thiab qhov ntau.
5.10A tam sim no jack (tsis tuaj yeem ntsuas tam sim no ntau dua 10A)
Thaum ntsuas AC thiab DC tam sim no ntau dua 200mA thiab tsawg dua 10A, tus cwj mem liab yuav tsum muab tso rau hauv 10A tam sim no jack.
6. Tam sim no jack
Thaum ntsuas AC thiab DC tam sim no tsawg dua 200mA, tus cwj mem liab yuav tsum tau muab tso rau hauv lub tsho tam sim no.
7. V/Ω jack
Thaum ntsuas AC thiab DC voltage, tsis kam, diode conduction voltage thiab luv-circuit detection, tus cwj mem liab yuav tsum muab tso rau hauv V / Ω jack.
8. Hauv av hom davhlau ya nyob twg "COM" jack dub cwj mem yog ib txwm muab tso rau hauv av jack.
9. tus nqi kuaj qhov (socket).
Lub collector ntawm lub transistor nyob rau hauv kev sim, lub hauv paus thiab emitter tau muab tso rau hauv lub "C", "B", "E" jack, xyuam xim rau qhov txawv ntawm lub transistor yog NPN-hom lossis PNP-hom.
