Definition of Digital Multimeter
A digital multimeter refers to a meter that can measure various parameters and display them on an LCD screen. Unlike analog multimeters, digital multimeters display digital calculations, making it easier to read measurement results. But the flip side of this advantage is that the analog multimeter can display the reading without any calculations, so it has a fast response time.
Digital multimeters have an LCD, a rotary dial, and multiple ports. The dial includes internal circuitry, which is connected by a concentric ring. Dial knobs are used to activate circuits for specific measurements. Digital multimeters have a built-in microprocessor to calculate readings. However, the input voltage or current is in analog form. Therefore, an ADC (analog to digital converter) is included to convert the reading and display it on the LCD screen. Unlike the pointer scale on analog multimeters, the LCD makes measurements easy to read. Additionally, the DMM has overload protection when measurements are out of range.
