Lub ntsiab lus ntawm cov cim thiab cov tsiaj ntawv ntawm lub multimeter
ACA (alternating tam sim no)
DCA (ncaj qha tam sim no)
DCV yog qhov hluav taws xob ncaj qha tam sim no
ACV yog alternating voltage
Lub diode cim saum toj no yog kuaj seb lub Circuit Court puas ua haujlwm.
HZ yog qhov zaus
Lub plug-in kab com yog qhov dav dav dav dav, thiab lwm txoj kab xaiv lub jack raws li lub cev kom muaj nuj nqis los ntsuas
interface:
Cx interface yog lub interface ntawm lub capacitance yuav tsum tau kuaj.
PNP NPN: Txhawm rau ntsuas qhov loj ntawm triode, thawj zaug hloov lub ntsuas mus rau qhov chaw hfe, hauv paus
Raws li daim ntawv lo ntawm txhua tus ncej thiab cov yam ntxwv ntawm triode yuav tsum tau kuaj, ntxig rau hauv qhov sib thooj.
COM: Common interface rau tam sim no, voltage diode, kuj, thiab zaus xeem.
Tag nrho lwm cov interfaces qhia txog hom thiab qhov ntsuas ntawm qhov ntsuas.
Dab tsi ua cov cim ntawm lub multimeter sawv cev
Turntable logo, clockwise:
OFF kaw, mV AC / DC millivolt voltage, V ~ AC voltage, V-DC voltage, Ω kuj,
Diode, continuity test, capacitance, zaus, triode magnification, kub,
μA AC / DC microamperes, mA AC / DC milliamps, A AC / DC amps, tawm
Sab saum toj kab ntawm cov nyees khawm, los ntawm sab laug mus rau sab xis:
SELECT ntau yam xaiv;
Hz / DUTY Hertz / teeb liab lub luag haujlwm voj voog;
Tuav khov, xauv;
RANGE ntau yam xaiv;
REL nyeem
Nco ntsoov tias muaj ib txoj hlua ntawm cov ntawv 10sec MAX hauv qab 10A lub logo, uas txhais tau hais tias thaum siv lub tsho no rau kev ntsuas, tsis pub ntau tshaj 10 vib nas this.
Lub ntsiab lus ntawm lwm cov cim:
Ω ohm Ntsuas tus nqi tsis kam
V-voltage ntsuas DC voltage
V-voltage ntsuas AC voltage
A-Tam sim no ntsuas DC tam sim no
A-Tam sim no ntsuas AC tam sim no
-≯— Diode Ntsuas qhov polarity ntawm diode
Hfe triode yog siv los ntsuas qhov magnification ntawm triode
Lub ntsiab lus ntawm cov cim tso rau ntawm lub multimeter
Multimeter tseem hu ua multimeter, peb lub hom phiaj ntsuas thiab multimeter. AC tam sim no, capacitance, inductance thiab qee yam ntawm cov khoom siv hluav taws xob (xws li ).
(1) ∽ txhais tau tias AC thiab DC
(2) V-2.5KV 4000Ω/V txhais tau tias rau AC voltage thiab 2.5KV DC voltage thaiv, nws rhiab heev yog 4000Ω/V
(3) AV-Ω txhais tau hais tias tam sim no, voltage thiab tsis kam yuav ntsuas
(4) 45-65-1000Hz qhia tias qhov kev khiav hauj lwm zaus yog qis dua 1000 Hz, thiab tus qauv muaj ntau zaus yog 45-65Hz
(5) 2000Ω / V DC txhais tau hais tias qhov rhiab heev ntawm DC thaiv yog 2000Ω / V
Cov cim ntawm lub clamp meter thiab lub vib nas this zoo ib yam li cov cim saum toj no (lwm tus tsis tuaj yeem sau tag nrho vim yog cov qauv tsis raug ntawm cov cim, 'txhais tau hais tias lub magnetoelectric system rectifier hom nrog txhua yam tshuaj tiv thaiv quab yuam' txhais tau tias peb-theem tiv thaiv sab nraud. magnetic teb ' txhais tau hais tias kab rov tav tso)))
Daim ntawv txuas 1, Nqe Lus Nug: Dab tsi yog multimeter
Multimeter tseem hu ua multimeter, peb lub hom phiaj ntsuas thiab multimeter. AC tam sim no, capacitance, inductance thiab qee yam ntawm cov khoom siv hluav taws xob (xws li ).
Kev siv cov multimeter
(1) Paub txog lub ntsiab lus ntawm txhua lub cim ntawm lub dial thiab lub luag haujlwm tseem ceeb ntawm txhua lub pob qhov rooj thiab qhov kev xaiv hloov.
(2) Ua raws li kev hloov kho tshuab xoom.
(3) Raws li hom thiab qhov loj yuav tsum tau ntsuas, xaiv lub iav thiab ntau yam ntawm qhov hloov pauv hloov, thiab nrhiav cov kab sib txuas.
(4) Xaiv txoj hauj lwm ntawm qhov kev ntsuam xyuas cov hlau lead.
(5) Ntsuas qhov hluav taws xob: Thaum ntsuas qhov hluav taws xob (lossis tam sim no), xaiv qhov zoo. Yog tias koj siv ntau yam me me los ntsuas qhov hluav taws xob loj, yuav muaj kev phom sij ntawm qhov ntsuas kub; Yog tias koj siv ntau qhov loj los ntsuas qhov voltage me me, tus pointer deflection tsawg dhau. Nyeem tsis tau. Kev xaiv ntawm qhov ntau yuav tsum sim ua kom tus pointer deflect mus txog 2/3 ntawm tag nrho cov nplai. Yog tias koj tsis paub qhov loj ntawm qhov ntsuas hluav taws xob ua ntej, koj yuav tsum xub xaiv cov iav ntau tshaj plaws, thiab maj mam txo mus rau qhov tsim nyog.
a. Kev ntsuas ntawm AC voltage: Muab ib qho kev hloov ntawm lub multimeter nyob rau hauv AC thiab DC voltage ntau, thiab lwm yam hloov nyob rau hauv qhov tsim nyog ntau yam ntawm AC voltage, thiab txuas ob tug cwj mem ntawm lub multimeter nyob rau hauv parallel nrog lub Circuit Court los yog load nyob rau hauv kev sim.
b Kev ntsuas ntawm DC voltage: Muab ib qho kev hloov ntawm lub multimeter ntawm AC thiab DC voltage ntau, thiab lwm qhov kev hloov ntawm qhov tsim nyog ntawm DC voltage, thiab txuas cov "ntxiv" xeem lead (liab test lead) mus rau lub peev xwm siab, "-" Cov khoom siv lead ua (cov hmoov txhuas dub) txuas nrog rau qhov tsis muaj peev xwm, uas yog, cia cov dej ntws tam sim no los ntawm qhov "ntxiv" cov hlau lead thiab ntws tawm ntawm qhov "-" cov hlau lead. Yog hais tias qhov kev xeem coj tau thim rov qab, tus pointer ntawm lub ntsuas lub taub hau yuav deflect nyob rau hauv qhov kev taw qhia, thiab nws yooj yim rau khoov tus pointer.
(6) Kev ntsuas tam sim no: Thaum ntsuas DC tam sim no, teeb tsa ib qho kev hloov ntawm multimeter mus rau DC tam sim no iav, thiab lwm qhov hloov mus rau qhov tsim nyog ntawm 50uA txog 500mA. Qhov kev xaiv ntau yam thiab kev nyeem ntawv ntawm qhov tam sim no yog tib yam li qhov voltage. Thaum ntsuas, lub Circuit Court yuav tsum raug txiav ua ntej, thiab tom qab ntawd lub multimeter txuas nrog hauv series mus rau hauv Circuit Court nyob rau hauv kev sim raws li cov kev taw qhia ntawm tam sim no los ntawm "ntxiv rau" mus rau "-", uas yog, tam sim no ntws los ntawm cov liab xeem. txhuas thiab ntws tawm los ntawm cov hlau kuaj dub. Yog hais tias lub multimeter txuas nyob rau hauv parallel nrog lub load los ntawm yuam kev, lub internal kuj ntawm lub meter lub taub hau yog heev me me, uas yuav ua rau ib tug luv luv Circuit Court thiab hlawv lub 'meter'. Nws txoj kev nyeem ntawv yog raws li nram no:
Tus nqi tiag tiag=qhia tus nqi × ntau yam / tag nrho qhov sib txawv
(7) Kev ntsuas qhov tsis kam: Thaum ntsuas qhov tsis kam nrog lub ntsuas ntsuas, cov hauv qab no yuav tsum ua raws:
a Xaiv lub iav magnification tsim nyog. Qhov ntsuas kab ntawm ohm block ntawm lub multimeter tsis sib npaug, yog li kev xaiv ntawm qhov thaiv qhov loj me yuav tsum ua kom tus taw qhia nyob rau ntawm qhov nyias nyias ntawm kab kab, thiab qhov ze ntawm tus taw tes yog mus rau nruab nrab ntawm qhov ntsuas, qhov tseeb dua. kev nyeem ntawv. Feem ntau, tus taw tes yuav tsum nyob nruab nrab ntawm 1/3 ~ 2/3 ntawm qhov ntsuas.
b ohm ua. Ua ntej ntsuas qhov tsis kam, ob qhov kev xeem coj yuav tsum tau luv luv, thiab "ohm (hluav taws xob) xoom hloov pob qhov rooj" yuav tsum tau kho tib lub sijhawm kom tus pointer tsuas yog taw qhia rau xoom txoj haujlwm ntawm sab xis ntawm ohm. nplai. Yog tias tus pointer tsis tuaj yeem hloov mus rau xoom txoj haujlwm, nws txhais tau hais tias lub roj teeb voltage tsis txaus lossis muaj teeb meem hauv lub ntsuas. Thiab txhua zaus lub iav magnification hloov, lub ohm xoom hloov yuav tsum tau ua dua los xyuas kom meej qhov ntsuas.
c nyeem ntawv: qhov kev nyeem ntawv ntawm lub ' meter ' multiplied los ntawm magnification yog tus nqi tsis kam ntawm qhov ntsuas tsis kam.
