Digital Multimeter and its uses A digital multimeter is an electrical test tool used to measure two or more electrical values—principally voltage (volts), current (amps) and resistance (ohms).
A digital multimeter, or DMM, produces highly accurate numerical readings and displays them on the LED screen. An analog multimeter, on the other hand, display readings using a pointer that deflects on the printed screen. This may produce inaccurate readings resulting from human errors. There are different types of DMMs and function differently.
Digital Multimeters are mainly of four types Basic Multimeter A basic multimeter costs around $5 and measures the three simplest and important values in the circuit: voltage, current, and resistance. However, this multimeter won’t last long and isn’t very accurate. This multimeter is very useful for beginners and it is very cheap.
Industrial Multimeter Industrial multimeters measure voltage and current 0.09% basic accuracy and also resistance capacitance frequency and temperature. Increases productivity with manual and automatic ranging, Display Hold, Auto Hold, and Min/Max-average recording. It has a large LCD display with 200 hours of data recording and graphical trend display.
Thermal Multimeter Thermal Multimeters are Full-featured multimeter with the built-in thermal image. It includes 15 measurement functions including AC voltage with a low-pass filter, DC voltage, Resistance, Continuity, Capacitance, Diode Test. etc. Saves measurements and images while communicating wireless with a smartphone up to 20 feet/6.1 m away.
Benchtop Multimeter Benchtop multimeters measure small currents with a resolution of up to 100 nA. It has a 6.5 digit resolution. The broad range of functions; measuring volts ohms and amps with a basic V DC accuracy of 0.015%.