Lub zog ntawm Analog Multimeters thiab Digital Multimeters
Ib qho digital multimeter yog qhov ntsuas ntsuas tam sim. Nws yuav siv ib qho qauv txhua 0.3 vib nas this los tso saib cov txiaj ntsig ntsuas. Qee zaum cov qauv nyeem ntawv tsuas yog zoo ib yam nkaus xwb, uas ua rau kev nyeem ntawv tau yooj yim dua piv nrog analog multimeters.
Analog multimeters feem ntau tsis muaj cov amplifiers built-in thiab yog li muaj qhov tsis zoo sab hauv. Piv txwv li, MF-10 qauv muaj DC voltage rhiab heev ntawm 100 kΩ / V, uas yog suav hais tias zoo heev. MF-500 qauv muaj DC voltage rhiab heev ntawm 20 kΩ / V.
Ua tsaug rau cov khoom siv hluav taws xob ua haujlwm ua haujlwm, cov multimeters digital tuaj yeem ua tiav qhov kev tiv thaiv sab hauv, feem ntau 1 MΩ lossis siab dua, uas xa cov rhiab heev dua. Qhov no txo qis qhov cuam tshuam rau hauv Circuit Court hauv kev sim thiab ua kom muaj kev ntsuas siab dua.
Nrog tsis tshua muaj kev tiv thaiv sab hauv thiab shunt thiab voltage divider circuits feem ntau yog tsim los ntawm cov khoom sib cais, analog multimeters muaj cov lus teb tsis sib xws (piv nrog digital multimeters). Txawm li cas los xij, analog multimeters muaj cov yam ntxwv zoo zaus.
Analog multimeters muaj ib qho yooj yim sab hauv qauv, yog li lawv yog cov nqi qis nrog tsawg zog. Lawv yooj yim los tswj thiab muaj zog tiv thaiv overcurrent thiab overvoltage.
Digital multimeters integrates ntau yam oscillator, amplifier, zaus divider thiab tiv thaiv circuits, muab ntau zog. Piv txwv li, lawv tuaj yeem ntsuas qhov kub thiab txias, zaus (hauv qhov qis), capacitance thiab inductance, thiab tseem ua haujlwm ua cov teeb liab generators.
Txij li cov kev sib xyaw ua ke tau siv dav hauv lawv cov qauv sab hauv, digital multimeters muaj peev xwm ua tsis tau zoo. (Txawm li cas los xij, qee cov qauv niaj hnub no txhawb kev pib-nruab nrab thiab kev tiv thaiv tsis siv neeg, tab sis lawv kuj nyuaj rau kev khiav lag luam thiab feem ntau nyuaj kho ib zaug puas.)
Digital multimeters tsim cov zis hluav taws xob tsawg (feem ntau tsis ntau tshaj 1 V), uas ua rau tsis yooj yim rau kev sim cov khoom nrog cov yam ntxwv tshwj xeeb, xws li silicon-tswj rectifiers (SCRs) thiab lub teeb-emitting diodes (LEDs).
Analog multimeters muab cov zis ntau dua (xws li 10.5 V thiab 12 V) thiab cov zis loj dua tam sim no. Piv txwv li, MF-500 tuaj yeem xa tawm kwv yees li 100 mA ntawm × 1 Ω tsis kam, ua kom yooj yim rau kev sim SCRs, LEDs thiab cov khoom zoo sib xws.
