Fluke Multimeters hauv Automotive Maintenance
Tej zaum qhov feem ntau siv automotive hluav taws xob kho cov cuab yeej yog multimeter. Ib tug raug multimeter tuaj yeem kuaj qhov voltage, tam sim no thiab tsis kam. Tshwj xeeb tsim multimeters xws li Fluke's F78 / F88 / F98 qauv muaj ntau yam tshwj xeeb rau kev kuaj tsheb, xws li zaus, lub voj voog ua haujlwm, ntsuas diode, ntsuas kub, lub sijhawm latching (Dwell), thiab txawm lub cav RPM (siv accessories).
Cov ntaub ntawv no yog yuav ua li cas siv cov khoom siv tshwj xeeb zoo no los ntawm Fluke thiab lawv cov khoom siv rau kev kho tsheb. Cov analogue / digital ua ke ntawm cov ntsuas no muaj qhov sib txawv kiag li rau lwm cov ntsuas, thiab lawv cov khoom siv kho kom yooj yim dua thiab yooj yim dua. Txawm hais tias multimeters tau siv ntau xyoo los kho tsheb, feem ntau ntawm lawv tsis muaj qhov tshwj xeeb rau kev kho tsheb. Khoos phis tawj thiab sensors ntawm txhua yam yog dav siv nyob rau hauv lub tsheb niaj hnub no, thiab ib tug tiag tiag multifunction multimeter yog xav tau rau kev kho tsheb. Thaum ntxov siv cov analogue (pointer) hom multimeter input impedance tsawg dhau, kev ntsuas ntawm hluav taws xob circuits muaj qhov cuam tshuam loj heev. Qhov ntsuas ntsuas no feem ntau ua haujlwm nrog 9V voltage, yog li nws yooj yim rau kev puas tsuaj rau cov khoom siv hluav taws xob. Nyob rau hauv xyoo tas los no, tus tshiab digital multimeter (DMM) tau txais ntau tus lej.
Nws muaj lub siab input impedance thiab yog superior rau analogue meters nyob rau hauv cov nqe lus ntawm raug thiab kev nyab xeeb. Qhov hluav taws xob thaum ntsuas kev tiv thaiv kuj tseem qis (feem ntau 5V, 3.5V rau Fluke), yog li nws tsis ua rau cov khoom puas. Tab sis cov ntsuas digital kuj muaj teeb meem. Nws tsis tuaj yeem tso saib cov ntaub ntawv hais txog kev hloov pauv uas nce lossis txo qhov ntsuas kev nyeem ntawv. Qhov no yog pom nyob rau hauv cov pa emissions testing thiab engine tsom xam qhov twg ib tug purely digital meter tsis tuaj yeem muab qhov hloov tsis tu ncua ntawm tus nqi.
Fluke kov yeej qhov tsis txaus ntawm cov ntsuas digital thiab hloov lawv nrog kev sib xyaw ua ke / ntsuas ntsuas digital. Nws muaj qhov zoo ntawm lub ntsuas ntsuas digital thiab ntsuas qhov ntsuas ntawm qhov ntsuas ntsuas analog.
Kev daws teeb meem xav txog
Thaum kho qhov teeb meem ntawm qhov hluav taws xob ntawm lub tsheb, qhov tseem ceeb tshaj plaws yog cov txheej txheem ntawm kev xav txog qhov ua rau muaj kev txhaum. Cov txheej txheem no tseem ceeb heev. Qhov no yog vim tias koj tsis tuaj yeem pom sab hauv lossis koj tuaj yeem nqa ntau cov khoom sib cais zoo li koj tuaj yeem ua nrog cov khoom siv tshuab. Hloov chaw, siv cov kauj ruam thiab cov laj thawj koj tuaj yeem pom qhov teeb meem sai. Cov cuab yeej tseem ceeb hauv cov txheej txheem no yog multimeter.
Kev faib tawm ntawm cov teeb liab
Cov cim tseem ceeb tau kuaj yog voltage, tam sim no thiab tsis kam. Tab sis feem ntau siv yog voltage. Cov lus nug muaj xws li: Puas muaj hluav taws xob? Tus nqi ntawm qhov voltage yog dab tsi? Dab tsi yuav tsum yog tus nqi ib txwm? Dab tsi yog qhov hluav taws xob poob thoob plaws qhov sib txuas lossis qhov txuas txuas? Piv txwv li, yog hais tias ib tug relay muaj ib tug input voltage ntawm 12.8 V thiab 9.2 V ntawm qhov tso zis, qhov voltage poob yog 3.6 V. Nco ntsoov tias cov connectors ntawm cov nyob ntawm tej yuav tsum tag nrho cov suav hais tias yog cov khoom thiab yuav tsim ib tug voltage poob. Yog li ntawd kuj tseem ua rau muaj kev txhaum.
