Yuav Ua Li Cas Nyeem Analog Multimeter Readings (4-Step Guide)

Koj tuaj yeem nug yog vim li cas koj yuav tsum paub siv A / D multimeter hauv lub hnub nyoog digital no.

Hauv kev ntsuas hluav taws xob, analog multimeters yog cov cuab yeej txhim khu kev qha. Cov kws tshaj lij tseem siv cov ntsuas ntsuas analog rau kev daws teeb meem hauv qee thaj chaw vim lawv qhov tseeb thiab qhov tseeb hloov pauv ntawm RMS qhov tseem ceeb.

Kuv mam li npog ntxiv hauv qab no.

Yuav ua li cas nyeem ib qho analog scale

Qhov ntsuas analog muaj ntau cov kab thiab tus lej. Qhov no tuaj yeem ua rau tsis meej pem rau cov pib tshiab, yog li ntawm no koj yuav kawm cov txheej txheem yooj yim rau kev nyeem cov nplai kom raug:

1. Koj tuaj yeem siv qhov ntsuas ohmic (kab saum toj kawg nkaus yog Ω) los xam kev tawm tsam ntawm sab laug mus rau sab xis. Koj yuav tsum muab qhov ntsuas ntsuas ntsuas los ntawm qhov ntau yam xaiv raws li qhov teev tseg. Yog tias koj qhov ntau yog 1 kΩ thiab tus taw tes tsis tu ncua ntawm 5, koj qhov kev nyeem ntawv yuav yog 5 kΩ.
2. Koj yuav tsum ua qhov kev hloov pauv nyob rau tib txoj kev rau txhua qhov kev ntsuas kom muaj nuj nqis.
3. Koj tuaj yeem ntsuas qhov voltage thiab tam sim no ntawm qhov ntsuas hauv qab ohmic nplai. DC voltage thiab tam sim no ntsuas ntawm ib sab ntawm ohmic nplai ntawm kab dub. Cov kab liab ib txwm sawv cev rau AC ntsuas. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias koj yuav tsum ntsuas cov ntaub ntawv tam sim no thiab voltage ntawm sab xis mus rau sab laug.

Txhawm rau nyeem cov ntsuas ntsuas analog, ua raws li cov kauj ruam no:

1 ruam: Txuas ib qho analog multimeter mus rau qhov kev xeem ua. Siv cov kev teeb tsa hauv qab no los ntsuas ntau qhov ntau:

Yuav siv li cas:

• Kev ntsuas hluav taws xobLus Cim: Txhawm rau ntsuas qhov ntsuas hluav taws xob, koj yuav tsum teeb lub ntsuas ntsuas rau ACV (alternating tam sim no voltage) lossis DCV (direct tam sim no voltage) ntau yam, nyob ntawm seb hom voltage ntsuas.
• Ntsuas tam sim noNco tseg: Txhawm rau ntsuas qhov tam sim no, koj yuav tsum teeb lub ntsuas ntsuas rau ACA (AC) lossis DCA (Direct Current), nyob ntawm qhov ntsuas tam sim no.
• Kev ntsuas ntsuas: Koj yuav teeb lub ntsuas rau qhov ohm (ohm) ntau yam.
• Kev ntsuas txuas ntxiv: Txhawm rau ntsuas qhov txuas ntxiv, koj yuav tsum teeb tsa lub ntsuas ntsuas mus rau qhov ntsuas qhov txuas ntxiv, feem ntau qhia los ntawm lub cim xws li diode lossis tus hais lus.
• Tshawb xyuas cov transistorsNco tseg: Koj yuav tsum teeb tsa lub ntsuas ntsuas rau hFE (transistor nce) ntau yam los ntsuas cov transistors.
• Tshawb xyuas CapacitorA: Txhawm rau kuaj cov capacitors, koj yuav tsum teeb lub ntsuas ntsuas rau qhov ntsuas qhov ntsuas (uF).
• Diode xeemNco tseg: Txhawm rau kuaj diodes, koj yuav tsum teeb lub ntsuas ntsuas rau qhov ntsuas diode, feem ntau qhia los ntawm lub cim xws li diode lossis delta.

2 ruam: Txuas cov ntsuas ntsuas rau cov khoom ntsuas hauv txhua qhov teeb tsa thiab xyuas cov ntsuas ntsuas. Peb yuav siv DC voltage xyuas ua piv txwv hauv qhov kev sib tham no.

3 ruam: Insert test coj mus rau hauv ob kawg ntawm AA roj teeb (txog 9V). Nyob ntawm qhov xaiv ntau yam, tus pointer yuav tsum hloov pauv ntawm qhov ntsuas. Lub xub yuav tsum nyob nruab nrab ntawm 8 thiab 10 ntawm qhov ntsuas yog tias koj lub roj teeb tau them tag nrho. 

4 ruam: Siv tib txoj kev los ntsuas kom muaj nuj nqis hauv kev teeb tsa sib txawv.

Raws li tau hais dhau los, ntau yam kev xaiv thiab kev sib faib yog tsim nyog rau kev nyeem cov lus analog kom raug. (1)

Piv txwv li, yog tias koj ntsuas qhov voltage ntawm lub tsheb roj teeb nrog A / D multimeter, qhov ntau yuav tsum loj dua. Koj yuav tsum tau ua ib qho yooj yim sib npaug los nyeem cov zis kawg.

Yog tias koj qhov DC voltage ntau yog 250V thiab rab koob nyob nruab nrab ntawm 50 thiab 100, qhov voltage yuav nyob ib ncig ntawm 75 volts nyob ntawm qhov chaw.

Taw qhia rau lub vaj huam sib luag

Nkag siab txog cov cuab yeej vaj huam sib luag kuj tseem ceeb heev rau kev nyeem ib qho analog multimeter. Nov yog yam koj yuav tsum paub:

• Volt (B): chav ntsuas hluav taws xob muaj peev xwm sib txawv lossis lub zog hluav taws xob. Nws ntsuas qhov voltage, qhov sib txawv ntawm hluav taws xob muaj peev xwm ntawm ob lub ntsiab lus hauv ib lub voj voog.
• Amplifiers (A): Chav ntsuas hluav taws xob. Nws yog siv los ntsuas qhov ntws ntawm cov nqi hluav taws xob hauv Circuit Court.
• Ohm (Ohm): Ib chav tsev ntawm hluav taws xob tsis kam. Nws yog siv los ntsuas qhov tsis kam ntawm cov khoom siv lossis cov khoom siv hluav taws xob.
• cov dej me me (µA): Ib chav tsev ntawm hluav taws xob tam sim no sib npaug rau ib lab ntawm ib lub ampere. Nws ntsuas me me tam sim no, xws li hauv lub transistor lossis lwm yam khoom siv hluav taws xob me me.
• kev (kΩ): ​​Ib chav tsev ntawm hluav taws xob tsis kam sib npaug rau 1,000 Ω. Nws ntsuas cov qib siab ntawm qhov tsis kam, piv txwv li hauv cov resistor lossis lwm yam passive Circuit Court.
• mav (mΩ): Ib chav tsev ntawm hluav taws xob tsis kam sib npaug rau 1 lab ohms. Nws ntsuas qhov kev tiv thaiv siab heev, xws li hauv kev ntsuas rwb thaiv tsev lossis lwm yam kev ntsuas tshwj xeeb.
• mob stroke AC voltage thiab DCV stands rau DC voltage.
• Interleaving (AC) yog ib qho hluav taws xob tam sim no uas hloov cov kev taw qhia ib ntus. Qhov no yog hom tam sim no uas feem ntau siv nyob rau hauv domestic thiab industrial zog tshuab thiab muaj zaus ntawm 50 los yog 60 Hz (hertz) nyob rau hauv feem ntau ntawm lub ntiaj teb no.
• Direct tam sim no (DC) yog ib qho hluav taws xob uas ntws hauv ib qho kev taw qhia xwb. Nws yog feem ntau siv hauv hluav taws xob circuits thiab khoom siv xws li roj teeb thiab hnub ci vaj huam sib luag.
• mob stroke и DCV Kev ntsuas ntsuas qhov sib txawv ntawm ob lub ntsiab lus hauv ib lub voj voog. AC voltage ntsuas yog siv los ntsuas AC voltage thiab DC voltage ntsuas yog siv los ntsuas DC voltage.

Ib qho analog multimeter kuj tseem muaj lwm yam kev nyeem lossis ntsuas ntawm lub dial lossis nplai, nyob ntawm qhov ntsuas qhov tshwj xeeb thiab muaj peev xwm. Nws yog ib qho tseem ceeb uas yuav tsum tau xa mus rau phau ntawv qhia lossis cov lus qhia rau qhov tshwj xeeb multimeter tau siv los nkag siab lub ntsiab lus ntawm cov txiaj ntsig no.

Nyob rau sab laug ces kaum ntawm lub multimeter, koj yuav tsum pom qhov twg los txuas cov probes.

Tom qab ntawd koj tuaj yeem nkag mus rau ntau txoj kev xaiv los ntawm cov chaw nres nkoj hauv qab sab xis. Thaum koj xav tau invert lub polarity ntawm kev ntsuas, ib qho kev xaiv polarity hloov los ua ke. Koj tuaj yeem siv lub hauv paus hloov pauv los xaiv tus nqi ntsuas thiab qhov xav tau ntau yam.

Piv txwv li, tig nws mus rau sab laug yog tias koj xav ntsuas qhov voltage range (AC) nrog analog multimeter.

Cov lus qhia tseem ceeb thiab kev ua kom yuam kev

• Thaum siv analog multimeters, xaiv qhov tsim nyog rau cov txiaj ntsig txhim khu kev qha. Koj yuav tsum ua qhov no ob qho tib si ua ntej thiab thaum lub sij hawm ntsuas kom muaj nuj nqis. (2)
• Ib txwm calibrate koj analog multimeter ua ntej ua ib qho kev sim loj lossis teeb meem. Kuv xav kom calibration txhua lub lim tiam yog tias koj siv koj lub cuab yeej txhua hnub.
• Yog tias koj pom cov kev hloov pauv tseem ceeb hauv kev ntsuas, nws yog lub sijhawm los hloov cov roj teeb.
• Yog tias koj paub tseeb tias qhov tseeb ntawm tus nqi ntsuas hauv volts, ib txwm xaiv qhov siab tshaj plaws.

tswv yim pom zoo

(1) kev sib npaug - https://www.britannica.com/science/multiplication

(2) Kev ntsuas kom muaj nuj nqis - https://www.sciencedirect.com/science/article/

pii/026322419600022X