What is the function of digital multimeter?
A digital multimeter is a test tool used to measure two or more electrical values—principally voltage (volts), current (amps) and resistance (ohms). It is a standard diagnostic tool for technicians in the electrical/electronic industries.
What is a digital multimeter explain the working of digital multimeter using block diagram?
A digital multimeter is one that is capable of measuring voltage, current, of alternating current circuits as well as direct current circuits. In addition it must have a provision for measurement of resistance also. Then only it becomes the digital AVO meter.
What is digital multimeter in computer?
A digital multimeter (DMM) is a testing tool that measures electrical values: current in amps, voltage in volts and resistance in ohms.
What is multimeter diagram?
The part of the circuit diagram of Multimeter, which can be used to measure DC voltage is shown in below figure. The above circuit looks like a multi range DC voltmeter. The combination of a resistor in series with PMMC galvanometer is a DC voltmeter. So, it can be used to measure DC voltages up to certain value.
What is multimeter Explain with suitable diagram?
A multimeter, shown in Figure 1, is a device used to measure two or more electrical quantities. A multimeter can be used to measure electrical functions such as voltage, current, resistance, continuity and some are able to measure electrical frequency. Fig.1: Digital Multimeter.
What are the basic building blocks of digital multimeter?
It basically consists of several A/D converters, counter circuits and an attenuation circuit. Explanation: Constant current source is used to measure resistance in a digital multimeter. Standard known value of current is passed through an unknown resistance and the drop in voltage across the resistance is measured.
What are the two types of multimeter?
Multimeters are divided into two types depending on the way the indication is displayed: analog and digital.
What is the function of range in multimeter?
You have to set the multimeter to a range that it can measure. For example, 2V measures voltages up to 2 volts, and 20V measures voltages up to 20 volts. So if you’ve measuring a 12V battery, use the 20V setting.
What is block diagram of digital computer?
Computer Block Diagram System: Mainly computer system consists of three parts, that are central processing unit (CPU), Input Devices, and Output Devices. The Central Processing Unit (CPU) is divided into two parts again: arithmetic logic unit (ALU) and the control unit (CU). Fig: Block Diagram of the computer.
What is the working principle of a digital multimeter?
Working Principle of Digital Multimeter. As shown in 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.
How does auto ranging digital multimeter ( DMM ) work?
The following figure represents the digital multimeter block diagram with all the functional blocks. The auto-ranging digital multimeter (DMM) only requires you to choose your electrical quantity you are attempting to measure, make sure you are properly placing your leads into the correct terminals and then reading the LCD display.
What is a block diagram of a digital computer?
Block Diagram of Digital computer digital computer is considered to be a calculating device that can perform arithmetic operations at enormous speed. It is defined as a device that operates upon information/data. To be able to process data the computer is made of various functional units to perform its specified task.
What is the role of the A / D in a multimeter?
The A/D converts the analog input signal to a digital output and is primarily responsible for key instrument characteristics of reading speed, linearity, resolution, normal mode rejection, and precision. The digital output is shown or obtained in several ways.