Yuav ua li cas xaiv ib tug digital multimeter
The accuracy of the digital multimeter directly affects the accuracy of the measurement results. When you get a digital multimeter, you should first analyze its accuracy technical indicators: one is to see if the accuracy of the meter can meet your requirements, and the second is to analyze the overall accuracy of the meter. For performance analysis, don't think that a 4-digit digital multimeter must have higher measurement accuracy than a 3.5-digit multimeter. The measurement accuracy of a 4.5-digit multimeter with rough craftsmanship may be better than that of a well-crafted 3.5-digit multimeter. The owner has encountered such a watch: a DT9103 4½-digit digital multimeter produced by an unknown small factory. During the measurement process, the numbers jumped very strongly, and it did not meet the requirements of the technical indicators.
Qhov tshwm sim
Ib qho zoo digital multimeter tuaj yeem dhau los ua cov khoom siv tes ua haujlwm zoo, thiab nws yuav tsum ua kom zoo tshaj plaws ntawm cov khoom siv, kev txhaj tshuaj molding txheej txheem, Circuit Court boards, tiv thaiv npog thiab lwm yam khoom.
Xyuas cov khoom
Tom qab tau txais digital multimeter:
Ua ntej ntawm tag nrho cov, koj yuav tsum xyuas seb cov ntaub ntawv nyob rau hauv zoo, seb lub keyboards thiab cov nyees khawm ua hauj lwm ib txwm thiab zoo.
Txawm hais tias lub toggle hloov (kev ntsuas kev ua haujlwm xaiv) yog hloov pauv hauv kev sib hloov, haum rau damping, xis nyob hauv tes, thiab seb qhov ntsuas ntsuas qhov zoo li cas.
Txawm hais tias lub vijtsam LCD yog qhov tseeb, seb puas muaj cov hlab ntsha ploj lawm, thiab cov dhia digital yuav tsum tsawg li tsawg tau.
Seb lub buzzer tuaj yeem suab.
siv yam
If you can open the case, you can pay attention to the design of the circuit board, the selected components, installation and soldering level, etc. For a good digital multimeter, the design of the circuit board is very important. Some major manufacturers' watches will use a multi-layer circuit board layout to provide better shielding and electrical performance. The level of selected components determines the measurement accuracy of the digital multimeter. High-end digital multimeters often use SMD components to improve the accuracy and reduce the volume of the circuit board. The components in key parts are even screened. We won't talk much about the welding level, as all electronics enthusiasts know about it (when it comes to welding level, you can open a digital multimeter of more than ten yuan to see it, and the products of the workshop are guaranteed to make you feel terrible).
Thaum yuav khoom, koj yuav tsum tau them sai sai rau qee cov ntsiab lus, xws li seb puas muaj kev tiv thaiv kev nyab xeeb, khoom warranty, kuaj cable, neeg siv phau ntawv, thiab lwm yam.
Kev ntsuas kev ua haujlwm
Thaum muas lub digital multimeter, koj tuaj yeem paub meej tias qhov ntsuas qhov ua haujlwm ntawm digital multimeter los ntawm kev ntsuas cov khoom paub (xws li tsis kam, capacitance, roj teeb voltage, AC voltage, thiab lwm yam) txais.
