Muaj pes tsawg leeg thiab kev ua haujlwm ntawm txhua feem ntawm multimeter
Lub multimeter yog tsim los ntawm peb yam: mechanical part, display part, and electronic part. Cov khoom siv tshuab muaj xws li: plhaub, iav pob qhov rooj thiab txhuam, thiab lwm yam. Cov khoom siv yog lub taub hau meter. Qhov hluav taws xob muaj xws li ntsuas Circuit Court board, potentiometer, resistor, Muaj cov diodes, capacitors thiab lwm yam.
Muaj nuj nqi ntawm ntau qhov chaw ntawm multimeter
(1) Lub taub hau
Lub 'meter' taub hau ntawm lub multimeter yog ib qho rhiab ammeter. Lub dial ntawm lub taub hau ' meter ' yog luam tawm nrog ntau yam cim, nplai kab thiab tus lej muaj nuj nqis (raws li pom hauv daim duab 3-4 (B)). Lub cim AV-Ω qhia tias qhov ntsuas no yog ib lub ntsuas ntsuas uas tuaj yeem ntsuas tam sim no, qhov hluav taws xob thiab tsis kam. Muaj ntau cov kab scale luam tawm ntawm lub dial. Ib qho cim nrog "Ω" nyob rau sab xis kawg yog cov kab tsis sib haum. Txoj cai kawg yog xoom thiab sab laug kawg yog ∞. Qhov ntsuas tus nqi faib tsis sib npaug. Lub cim "-" lossis "DC" sawv cev ncaj qha tam sim no, "~" lossis "AC" sawv cev rau qhov hloov pauv tam sim no, thiab "~" sawv cev rau cov kab sib faib los ntawm AC thiab DC. Ob peb kab ntawm tus lej nyob rau hauv kab kab yog qhov ntsuas qhov tseem ceeb sib raug rau qhov sib txawv zog ntawm tus xaiv hloov.
Kuj tseem muaj lub tshuab xoom hloov kho pob qhov rooj ntawm lub taub hau saib kom kho tus pointer kom taw tes rau xoom ntawm sab laug kawg.
(2) Xaiv qhov hloov pauv
Multimeter's selector hloov yog ib txoj hauj lwm sib hloov. Siv los xaiv cov khoom ntsuas thiab ntau yam. (Raws li pom hauv daim duab 3-4(B)). General multimeter ntsuas cov khoom suav nrog: "mA"; DC tam sim no, "V": DC voltage, "V": AC voltage, "Ω": tsis kam. Txhua yam khoom ntsuas tau muab faib ua ntau yam sib txawv rau kev xaiv.
(3) Test leads thiab test lead sockets
Cov cwj mem muab faib ua xim liab thiab dub. Thaum siv, ntxig cov hlau kuaj liab rau hauv lub jack cim nrog "+" thiab cov hlau kuaj dub rau hauv lub jack cim nrog "-".
