Reach for an oscilloscope if you want to make both quantitative and qualitative measurements. If a red flag is raised with your multimeter, you may need to grab an oscilloscope or more powerful tool to diagnose further. Grab one to make high-precision checks of voltage, current, resistance, frequency, and other electrical parameters. Make sure to keep your digital multimeter with you for any electrical work. Some oscilloscopes have built-in multimeters like the Fluke 120B ScopeMeter, giving you both numbers and pictures. In many cases, these kinds of oscilloscopes can replace a multimeter. Battery power and smaller size, for portability, are typically required for field use. Oscilloscopes can be line powered or battery powered they can be big or small. One of the advantages of an oscilloscope over multimeter is that oscilloscopes also have the ability to visually display complex signals (the "picture" part in the adage), able to show a transient signal that may pose a threat to a system can be displayed, measured, and isolated with an oscilloscope. It will also graphically show distortion and noise that may be present in the signal. Oscilloscopes are designed for engineering work or troubleshooting systems that might contain complex signals that send at speeds much faster than a digital multimeter can capture. Scopes have much faster measurement engines and much wider measurement bandwidths than digital multimeters, but typically do not have the same accuracy and resolution strength as a multimeter. Oscilloscopes generally have a resolution equivalent to a 3.5-to-4-digit digital multimeter. An advanced bench precision digital multimeter can cost as much as a portable oscilloscope.
These digital multimeters are used in the lab, mostly for research and development or for production systems.
You can also find high-accuracy (5 to 8 digits resolution), bench-type, line-powered digital multimeters that are not intended for field use. They also contain advanced functions for special-purpose testing, such as fast They are portable and lightweight, used typically for front-line testing and general-purpose measurements. Handheld digital multimeters typically have 3.5 to 4.5 digits of resolution and good accuracy. a multimeter Why use a digital multimeter? Fluke virtual demos and product selectorsĬomparing an oscilloscope vs.
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