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  2. Class of accuracy in electrical measurements - Wikipedia

    en.wikipedia.org/wiki/Class_of_accuracy_in...

    The ammeter is used in series with the load, so the same current flows through the load and the ammeter. The voltmeter is used in parallel with the load, so the voltage between the two terminals of the load is equal to the voltage between the two terminals of the voltmeter. Ideally the measuring device should not affect the circuit parameters i ...

  3. Electrical measurements - Wikipedia

    en.wikipedia.org/wiki/Electrical_measurements

    Ammeter and Voltmeter on a power supply. Electrical measurements are the methods, devices and calculations used to measure electrical quantities. Measurement of electrical quantities may be done to measure electrical parameters of a system.

  4. Ammeter - Wikipedia

    en.wikipedia.org/wiki/Ammeter

    Demonstration model of a moving iron ammeter. As the current through the coil increases, the plunger is drawn further into the coil and the pointer deflects to the right. An ammeter (abbreviation of ampere meter) is an instrument used to measure the current in a circuit. Electric currents are measured in amperes (A), hence the name. For direct ...

  5. Accuracy class - Wikipedia

    en.wikipedia.org/wiki/Accuracy_class

    Calculation for accuracy of class 1 meter: 1600 impulse/KWh and considering, P.F= 1 and LOAD = 100w Revolution time, Rt = (3600 ...

  6. Multimeter - Wikipedia

    en.wikipedia.org/wiki/Multimeter

    Every inline series-connected ammeter, including a multimeter in a current range, has a certain resistance. Most multimeters inherently measure voltage, and pass a current to be measured through a shunt resistance, measuring the voltage developed across it. The voltage drop is known as the burden voltage, specified in volts per ampere.

  7. Current clamp - Wikipedia

    en.wikipedia.org/wiki/Current_clamp

    An electrical meter with integral AC current clamp is known as a clamp meter, clamp-on ammeter, tong tester, or colloquially as an amp clamp. A clamp meter measures the vector sum of the currents flowing in all the conductors passing through the probe, which depends on the phase relationship of the currents. Only one conductor is normally ...

  8. Voltmeter - Wikipedia

    en.wikipedia.org/wiki/Voltmeter

    A voltmeter is an instrument used for measuring electric potential difference between two points in an electric circuit. It is connected in parallel . It usually has a high resistance so that it takes negligible current from the circuit.

  9. Current sensing - Wikipedia

    en.wikipedia.org/wiki/Current_sensing

    The generated signal could be analog voltage or current or a digital output. The generated signal can be then used to display the measured current in an ammeter, or can be stored for further analysis in a data acquisition system, or can be used for the purpose of control. The sensed current and the output signal can be: Alternating current input,