What is the working principle of digital voltmeter?

Answer 1

# voltmeters usually employ an electronic circuit that acts as an http://www.answers.com/topic/integrator,

# linearly ramping output voltage when input voltage is constant (this can be easily realized with an http://www.answers.com/topic/operational-amplifier).

# The dual-slope integrator method applies a known reference voltage to the integrator for a fixed time to ramp the integrator's output voltage up, then the unknown voltage is applied to ramp it back down, and the time to ramp output voltage down to zero is recorded (realized in an http://www.answers.com/topic/analog-to-digital-converter implementation).

# The unknown voltage being measured is the product of the voltage reference and the ramp-up time divided by the ramp-down time.

# The voltage reference must remain constant during the ramp-up time, which may be difficult due to supply voltage and temperature variations. .

Digital voltmeters necessarily have input amplifiers, and, like vacuum tube voltmeters, generally have a constant input resistance of 10 megohms regardless of set measurement range

Answer 2

It's a meter to measure voltages and resistances and displaying the results by numbers on a small screen as opposed to the old type that had needles or indicators that swept left to right or vice versa over a scale with numbers on it. it's easier to read.
A piece of test equipment used for measuring voltage, current, resistance, and possibly other electrical quantities and displaying the value in number form.

Answer 3

A digital voltmeter, or DVM, is used to take highly accurate voltage measurements. These instruments measure the electrical potential difference between two conductors in a circuit. They are electric voltmeters and the preferred standard, as they offer several benefits over their analog counterparts.

Answer 4

What is the working principle of digital voltmeter?

Answer 5

1.Ramp type dvm2.staircase ramp type dvm

3.successive approximation type dvm

4.dual slope dvm