Voltage meeter series#

In the older electromechanical meters the voltage coil, also known as potential coil, produced a magnetic field in the meter. To get kilowatts from watts, divide the watts by 1000. If the amperage goes down, the wattage goes down. If the voltage stays constant and the amperage goes up that means that the wattage will go up. Look at the equations again and go back to algebra I. And then as if by magic the readout is in kilowatts. So, the meter measures this voltage and then multiplies the voltage times the current in the circuit to get watts. Well, the nominal voltage in a typical metering circuit remains pretty much constant. So, now that we know the terms we need to know how they relate to metering. The easy way to remember W = V x A is to think of West Virginia or W VA. So, the two equations are equal they are just using different terms. In the second example, W = watts, V = voltage, A = amps. Just a quick fact here, E is the letter used because it stands for electromotive force which is a fancy way to say voltage. In the first example, P = power measured in watts, I = current measured in amps, and E = voltage measured in volts. Another is to change the letters to W = V x A.

There are several ways you can remember this formula. Using OhmвЂ™s Law we know that power is equal to voltage times current or stated mathematically, P = I x E. To calculate watts we need to know the current and the, you guessed it, voltage. So, what does that have to do with voltage? To find the kilowatts, we first need to find the watts. How does voltage relate to metering?ДЄh yes, the big question is, how do we use voltage in metering? Well, we have to remember that meters measure kilowatts. The volt is named after Alessandro Volta who created the first battery known as a voltaic pile. The unit of measure for voltage is known as the volt.

With a voltmeter we can choose two different points in the circuit to measure the difference in potential across those two points. So, what is voltage? It is the driving force in an electrical circuit. We can think of it as the pressure in the circuit. Voltage is the driving force in an electrical circuit. Some find it easier to understand the voltage definition when we talk in terms of water pipes. What a definition of voltage right? Another way that voltage is defined is by talking about water. The most commonly used voltage definition states that voltage is the difference in potential between two points in a circuit. What is the voltage on the machine? Or, can you check the voltage on that circuit? We hear it, we say it but, what is voltage and how does it relate to metering? What is voltage? A typical lab voltmeter can indicate these voltages, but CRT units should be serviced only by qualified technicians because the voltages are high enough to be lethal.What is voltage? This is certainly an important term to know in the electrical field. Cathode-ray-tube ( CRT) monitors operate at several hundred volts. In computer practice, standard lab voltmeters are adequate because the voltages encountered are moderate, usually between 1 V and 15 V. Voltmeters for measuring high potential differences require heavy-duty probes, wiring, and insulators. Oscilloscopes are also excellent for the measurement of peak and peak-to-peak voltages in AC and RF applications. Most commercially manufactured voltmeters have several scales, increasing in powers of 10 for example, 0-1 V, 0-10 V, 0-100 V, and 0-1000 V.ДЄn oscilloscope can be used to measure low voltages the vertical displacement corresponds to the instantaneous voltage. Practical laboratory voltmeters have maximum ranges of 1000 to 3000 volts (V). Some of these meters can determine voltage values to several significant figures.

Voltage meeter series#

The sensitivity of the galvanometer and the value of the series resistance determine the range of voltages that the meter can display.ДЄ digital voltmeter shows voltage directly as numerals. Otherwise it will draw significant current, and thereby disturb the operation of the circuit under test. The internal resistance of a voltmeter must be high. Specialized voltmeters can measure radio frequency ( RF) voltage.ДЄ basic analog voltmeter consists of a sensitive galvanometer (current meter) in series with a high resistance. Some voltmeters are intended for use in direct current (DC) circuits others are designed for alternating current ( AC) circuits. A voltmeter, also known as a voltage meter, is an instrument used for measuring the potential difference, or voltage, between two points in an electrical or electronic circuit.