Multimeter symbol table: piav qhia
Txheem
Multimeter yog dab tsi?
Multimeter yog ib qho cuab yeej ntsuas yooj yim uas tuaj yeem ntsuas ntau yam khoom siv hluav taws xob xws li voltage, tsis kam, thiab tam sim no. Cov cuab yeej tseem hu ua volt-ohm-millimeter (VOM) vim nws ua haujlwm raws li voltmeter, ammeter, thiab ohmmeter.
Hom multimeters
Cov cuab yeej ntsuas no sib txawv ntawm qhov loj, nta thiab tus nqi thiab yog tsim los nqa los yog siv rau ntawm lub rooj nyob ntawm seb lawv xav siv. Hom multimeters muaj xws li:
- Analog multimeter (kawm nyeem ntawm no)
- Cov multimeter
- Fluke multimeter
- Clamp multimeter
- Tsis siv neeg multimeter
Lub multimeter yog ib qho ntawm cov cuab yeej siv feem ntau siv niaj hnub no. Txawm li cas los xij, cov neeg pib tshiab feem ntau pom tias nws nyuaj rau txheeb xyuas cov cim ntawm lub multimeter. Hauv tsab xov xwm no, peb yuav qhia koj yuav ua li cas kom paub cov cim ntawm lub multimeter.
Txawm hais tias ntau hom multimeters muaj nyob rau hauv kev ua lag luam, lawv txhua tus siv tib lub cim system. Cov cim tuaj yeem muab faib ua ntu hauv qab no:
- On/Off icon
- lub rooj vag icon
- Voltage cim
- Lub cim tam sim no
- Resistor cim
Lub ntsiab lus ntawm cov cim ntawm lub multimeter
Cov cim hauv multimeter muaj xws li:
| Cim | Qhov system ua haujlwm |
| HOLD khawm | Nws pab sau thiab txuag cov ntaub ntawv ntsuas. |
| On/off khawm | Qhib, tua nws. |
| COM chaw nres nkoj | Nws sawv rau Common thiab yuav luag ib txwm txuas rau hauv av (Ground) lossis cathode ntawm Circuit Court. Qhov chaw nres nkoj COM feem ntau yog xim dub thiab feem ntau yog txuas nrog ib qho kev sojntsuam dub. |
| chaw nres nkoj 10A | Qhov no yog qhov chaw nres nkoj tshwj xeeb, feem ntau yog tsim los ntsuas qhov siab tam sim no (> 200 mA). |
| mA, ua | Tsawg tam sim no ntsuas chaw nres nkoj. |
| mA ohm chaw nres nkoj | Qhov no yog qhov chaw nres nkoj uas qhov kev sojntsuam liab feem ntau txuas nrog. Qhov chaw nres nkoj no tuaj yeem ntsuas tam sim no (txog 200mA), voltage (V), thiab tsis kam (Ω). |
| chaw nres nkoj oCV ΩHz | Qhov no yog qhov chaw nres nkoj txuas nrog cov hlau kuaj liab. Tso cai rau koj ntsuas kub (C), voltage (V), tsis kam (), zaus (Hz). |
| True RMS chaw nres nkoj | Feem ntau txuas nrog lub xov hlau liab. Txhawm rau ntsuas qhov tseeb hauv paus txhais tau tias square (true RMS) parameter. |
| SELECT khawm | Nws pab hloov ntawm kev ua haujlwm. |
| kaj | Kho qhov ci ntawm cov zaub. |
| Mains voltage | Hloov tam sim no. Qee cov khoom tsuas yog hu ua A. |
| DC voltage | D.C. |
| Hz | Ntsuas qhov zaus. |
| HNUB | Kev ntsuas lub voj voog. Ntsuas qhov tam sim no capacitance. Tshawb xyuas txuas ntxiv, luv Circuit Court (Continuity check). |
| teeb liab khawm | Diode Test (Diode Test) |
| hFE ua | Transistor-transistor xeem |
| NCV | Tsis tiv tauj tam sim no induction muaj nuj nqi |
| REL khawm (tus txheeb ze) | Teem tus nqi siv. Pab sib piv thiab txheeb xyuas qhov ntsuas qhov sib txawv. |
| RANGE khawm | Xaiv qhov chaw ntsuas tsim nyog. |
| MAX / MIN | Khaws qhov siab tshaj plaws thiab yam tsawg kawg nkaus cov tswv yim; Beep ceeb toom thaum ntsuas tus nqi tshaj tus nqi khaws cia. Thiab ces tus nqi tshiab no yog overwritten. |
| Symbol Hz | Qhia qhov zaus ntawm Circuit Court lossis ntaus ntawv. |
Yuav siv lub multimeter?
- Siv los ntsuas qhov voltage, piv txwv li: ntsuas DC tam sim no, AC tam sim no.
- Ntsuas qhov tsis kam nrog qhov voltage, tam sim no thiab me me ohmmeter.
- Siv los ntsuas lub sijhawm thiab zaus. (1)
- Muaj peev xwm kuaj xyuas cov teeb meem hluav taws xob hauv tsheb, xyuas cov roj teeb, lub tsheb hloov pauv, thiab lwm yam. (2)
Kab lus no muab tag nrho cov cim txhais rau kev siv kom paub txog tag nrho cov cim tso tawm ntawm lub multimeter. Yog tias peb plam ib qho lossis muaj lus pom zoo, thov xa email rau peb.
tswv yim pom zoo
(1) Kev ntsuas zaus - https://www.researchgate.net/publication/
269464380_Frequency_Measurement
(2) Kev kuaj mob - https://www.sciencedirect.com/science/article/
ib/ 0305048393900067
