The concept of the way the digital multimeter works is relatively straightforward, but it can be understood that measuring varying waveforms or intermittent voltages can give unusual results. A digital multimeter (DMM) is an instrument that can measure several basic electrical quantities and shows the measurement with a number in a display. Some can also measure other electrical quantities such as frequency or even temperature.

The standard and basic measurements performed by multimeter are the measurements of amps, volts, and ohms.

Fig.1: Digital Multimeter There are two main types of multimeters. Working Principle of Digital Multimeter As shown in the block diagram, in a typical Digital multimeter the input signal i.e ac or dc voltage, current, resistance, temperature or any other parameter is converted to dc voltage within the range of the ADC. One of the first and oldest multimeters is theanalog meter, (Figure 2) and the other, now more widely used meter is the digital multimeter (Figure 1).

DVM is an acronym for Digital Voltmeter. Digital Multimeter Working. Digital Voltmeter is a voltage sensitive device. April 22, 2014 June 20, 2014 George 2 Comments digital multimeter repair, digital multimeter troubleshooting, dmm help, repairing dmm Your digital multimeter should last for a number of years with reasonable care, but there may come a time when you multimeter malfunctions and you’ll have to decide whether to repair it or buy a new one. DVM was first invented in 1954 by Andrew Kay.

It is also known as the voltmeter or Ohm meter or Volt Ohm meter. It measures AC or DC voltage and displays the value directly in numeric form instead of pointer deflection. When working with the scalable digital multimeter you need to have an idea of the value of voltage, current, or resistance that you are attempting to measure.

All multimeters measure ac and dc voltage (voltmeter), ac and dc current (ammeter), and resistance (ohmmeter). Also it is important to select the right accuracy setting for the time that the measurement can be taken. Apart from that, these digital… Digital multimeter is a test equipment which offers several electronic measurement task in one tool. There two types of digital multimeters (DMM): scalable digital multimeter and auto-ranging digital multimeter as shown in Figure 1.

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