Cov cim ntawm lub multimeter txhais li cas?
Multimeter yog koom nrog cov khoom siv hluav taws xob, khoom siv hauv tsev, hluav taws xob hluav taws xob tsim nyog cov cuab yeej ntsuas. Feem ntau siv tshuab thiab hluav taws xob ob yam. Feem ntau, feem ntau ntawm cov neeg kho tshuab xaiv ntawm MF47 hom, hluav taws xob digital multimeter qauv muaj ntau yam tshwj xeeb.
Cov cim feem ntau siv hauv multimeter
① DCA → DC tam sim no → microampere (uA) → milliampere (mA) → ampere (A).
② DC Ⅴ → DC voltage → millivolt (m Ⅴ) → volt (Ⅴ).
③ AC V → AC voltage → volts (V).
④Ω → DC tsis kam → ohm (Ω)
→ kilohm (KΩ) → megohm (MΩ)
⑤ Pathway Buzzing → Buzzer suab thaum qis dua 10Ω.
⑥ capacitance ntsuas → C * 0.1, C * 1, C * 10, C * 100, C * 1K, thiab lwm yam.
⑦ hFE → transistor DC amplification.
⑧ dB → suab → {{0}}dB ~ +22dB, 0dB=1mw/600Ω.
MF47 Kev siv tshuab;
Ua ntej siv, koj yuav tsum xyuas seb tus pointer puas nyob rau hauv lub tshuab xoom txoj hauj lwm, xws li tsis taw tes ntawm xoom txoj hauj lwm, koj tuaj yeem tig lub xoom adjuster ntawm lub hau ntawm lub rooj kom lub pointer qhia qhov xoom txoj hauj lwm. Tom qab ntawd ntxig cov liab thiab dub plugs ntawm qhov ntsuas bar rau hauv lub "+" thiab "-" jacks, xws li ntsuas AC / DC 2500V lossis DC 10A, cov ntsaws liab yuav tsum muab tso rau hauv cov jacks sau tias "2500V" lossis "10A" . "los yog "10A" qhov (socket).
DC tam sim no ntsuas: Thaum ntsuas 0.05-500mA, tig mus rau qib uas xav tau tam sim no. Kev ntsuas ntawm 10A, lub pob liab liab "+" yuav tsum tau muab tso rau hauv 10A jack, tig qhov hloov pauv tuaj yeem muab tso rau ntawm 500mA DC tam sim no txwv, thiab tom qab ntawd txuas cov ntsuas ntsuas hauv series hauv Circuit Court hauv qab kev sim.
Kev ntsuas hluav taws xob AC thiab DC: Thaum ntsuas AC {{0}}V lossis DC 0.25-1000V, tig mus rau qhov ntsuas hluav taws xob xav tau. Kev ntsuas ntawm AC thiab DC 2500V, qhov hloov pauv yuav tsum tau tig mus rau txoj haujlwm ntawm AC thiab DC 1000V, thiab tom qab ntawd txuas cov pas ntsuas hluav taws xob thoob plaws hauv kev sim. Yog tias nruab nrog lub ntsuas hluav taws xob siab, nws tuaj yeem ntsuas qhov hluav taws xob siab ntawm TV teeb tsawg dua lossis sib npaug li 25kV. Kev ntsuas, qhov hloov pauv yuav tsum tau muab tso rau ntawm 50uA txoj haujlwm, qhov ntsuas hluav taws xob siab ntawm cov liab thiab dub ntsaws tau muab tso rau hauv "+", "-" qhov (socket), grounding clamps thiab TV hlau phaj txuas, thiab tom qab ntawd tuav lub ntsuas ntsuas. . Kev ntsuas ntawm AC 10V voltage, nyeem, thov saib AC 10V tshwj xeeb nplai (liab).
DC tsis kam ntsuas: nruab lub roj teeb (R14 hom 2 # 1.5V thiab 6F22 hom 9V txhua), tig qhov hloov mus rau qhov yuav tsum tau ntsuas ntsuas iav, ntsuas pas nrig ob luv, kho lub pob qhov ohm, kom tus taw tes ua raws li cov ohm "0" txoj hauj lwm, thiab tom qab ntawd sib cais los ntawm cov pas ntsuas ntsuas. Kev ntsuas kev tiv thaiv nyob rau hauv Circuit Court, koj yuav tsum xub txiav tawm lub hwj chim mov, xws li capacitors nyob rau hauv lub Circuit Court yuav tsum tau tso tawm ua ntej. Thaum kuaj xyuas cov dej xau ntawm cov polarized electrolytic capacitors, koj tuaj yeem tig qhov hloov mus rau R × 1k cov ntaub ntawv, tus pas nrig liab ntawm qhov ntsuas bar yuav tsum tau txuas nrog lub davhlau ya nyob twg tsis zoo ntawm lub capacitor, tus pas nrig dub txuas nrog lub davhlau ya nyob twg zoo ntawm lub capacitor. . Nco tseg: Thaum R × 1k tsis tuaj yeem hloov kho rau xoom lossis lub buzzer tsis ua haujlwm zoo, thov hloov 2 # (1.5V) roj teeb. Thaum lub R × 10k iav tsis tuaj yeem hloov mus rau xoom txoj hauj lwm, los yog infrared nrhiav pom iav lub teeb lub teeb ci tsis txaus, thov hloov lub roj teeb 6F22 (9V) laminated.
