The differences between analog multimeters and digital multimeters are as follows
A multimeter is an electrical measuring instrument used to measure electrical parameters such as voltage, current, and resistance. Not all multimeters are the same, and different multimeters have different sizes, accuracies, accuracies, and measurement parameters. Multimeters are mainly used by electricians, engineering students, and amateur enthusiasts to troubleshoot electrical equipment and circuits. There are two main types of multimeters, namely analog multimeters and digital multimeters.
The analog multimeter is the oldest multimeter. It has a needle that rotates along the scale, but it is difficult to read. The advantage is that it is cheap and sensitive. Analog multimeters are more sensitive than digital multimeters, and can even sense small changes in readings.
The analog multimeter is made of a coil placed between two permanent magnets, with a pin placed on top of the coil. When current passes through a coil, the coil generates a magnetic field that interacts with the magnetic field of the permanent magnet, causing it to rotate. When the coil rotates, the pointer will move along the scale. The rotation angle of the coil depends on the amount of current flowing through the coil. Therefore, analog multimeters, also known as galvanometers, have very low resistance and are therefore more sensitive than digital multimeters. But it should be noted to avoid full-scale deflection (FSD). When the current exceeds the range of coil deflection, it begins to burn out the coil, causing damage to the instrument.
Multimeter
A digital multimeter refers to an instrument that can measure various parameters and display them on an LCD screen. Unlike analog multimeters, digital multimeters display measurement results in a digital calculation format, making them easier to read. But the other side of this advantage is that the analog multimeter can display readings without any calculations, thus having a fast response time.
The digital multimeter has an LCD, a rotating dial, and multiple ports. The dial includes an internal circuit connected by a concentric ring. The dial knob is used to activate the circuit for specific measurements. The digital multimeter is embedded with a 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 scales on analog multimeters, LCD makes measurement results easy to read. In addition, when the measurement exceeds the range, the digital multimeter has overload protection.
