What is the difference between a multimeter and an oscilloscope
Both multimeters and oscilloscopes are commonly used tools. Multimeters and oscilloscopes are all too familiar to electrical engineers. It can be said that it is an indispensable tool for R&D, debugging and maintenance. Of course, the functions of a multimeter and an oscilloscope are completely different.
multimeter
There are two types of multimeters: pointer type and digital type; the pointer type has basically been eliminated, and now the digital multimeter is basically used.
The multimeter can be used to measure resistance, AC, DC voltage, AC, DC current, diode, capacitance, frequency, etc. The multimeter is simple and easy to use. As long as the gear is dialed to the functional gear that needs to be measured, the measurement can be performed.
When using a multimeter to measure current, you need to pay special attention. To measure the current, you need to connect the multimeter to the circuit in series, and you need to insert the red test lead into the jack of the appropriate range. If the current exceeds the range, the fuse of the multimeter will burn out.
oscilloscope
Oscilloscopes and multimeters are different, multimeters can only display measured values. The oscilloscope can make fast, continuous measurements of the signal, and plot it as a curve and display it on the screen.
Oscilloscopes are widely used. Signals that are invisible to the naked eye can be converted into images. We can analyze the changes of various signals and data based on the measured signal waveform.
There are many functions and menus of the oscilloscope, which requires a certain basic knowledge to use.
There are two types of multimeters: analog and digital.
The pointer of the analog watch swings flexibly, making it easier to judge the changes in the circuit.
The digital meter has fast response, intuitive reading and small parallax.
The multimeter intelligently measures DC signals and low-frequency pure AC signals more accurately. For most AC signals and digital signals, only an oscilloscope can be used for detection. Because the oscilloscope can display various signal waveforms in the detected electronic circuit on the oscilloscope tube, people can accurately judge whether the circuit is normal in the maintenance of equipment and circuit debugging.
Electric signals in circuits, especially weak electronic circuits, may be complex, random, and transient. At this time, an oscilloscope can be used to analyze the characteristics of the signal and estimate its electrical parameters. The multimeter can only measure the typical electrical parameters of the steady-state electrical signal, which is not convenient for the measurement and analysis of the complex electrical signal parameters. The multimeter is not only suitable for traditional strong current line measurement, but also can measure certain parameters in weak current line. Oscilloscopes are widely used in electronic circuits, and are less suitable for strong current circuits.
Not to mention the various functions of the multimeter, everyone knows it, but when measuring the signal, the multimeter can only measure a rough voltage to initially judge and guess whether there is a fault at the measurement place, and it cannot be accurately judged, but the oscilloscope can intuitively see it. Whether the waveform of the measuring point is deformed or the signal is lost, it can accurately judge whether there is a fault and whether it is distorted. Visually see if there is a problem
