标题: ：）电量和电子元件的测量（英中对照） [打印本页] 作者: 琉璃公社 时间: 2005-11-24 01:21 标题: ：）电量和电子元件的测量（英中对照） 原文：Measurement of electrical quantities and component
Electrical parameters
Most measurements made on electronic equipment are the parameters of voltage, current, and power. These measurements are usually made during the final product testing phase or incoming testing before the equipment is placed in day-to-day use and Of course during system diagnostic and maintenance stages. Verification of proper operating voltages, current, and power indicate that at least the system has an operational power supply and that power regulation circuits are operating correctly. Oftentimes the main problem with many electronic systems is a poor or defective power supply and by monitoring the power supply electrical parameters, a power supply failure and system outage can be avoided.
Voltage
One of the easiest measurements to make on a system is voltage. Voltage can be measured using a variety of methods. Instruments used in today’s electronic industry consist of various types of voltmeters with accuracies form 5 percent of full scale to nearly 0.002 percent of reading. Many multimeters used today still use the magnetoelectric meter movement as an indicating device. Many people still feel that a meter showing small flickering changes is easier to read than a digital meter on which you try to read flashing digits. The digital voltmeter has to be powered with a power supply or batteries, while the magnetoelectric type meter only needs a battery in the ohms mode.
译文：电量和电子元件的测量