The device that measures the effective voltage is called a multimeter. A multimeter can measure various electrical parameters, including rms (or root mean square, RMS) voltage. It displays the voltage in terms of its effective value, which is the equivalent of the DC voltage that would produce the same power dissipation in a resistive load. Multimeters can be digital or analog.
The device used to measure effective voltage is known as a voltmeter, which can be a stand-alone instrument or a part of a multimeter. A voltmeter is designed to measure voltage at two points in an electrical circuit. For effective voltage measurement specifically, it is essential to use a true RMS voltmeter, especially when dealing with non-sinusoidal waveforms.
The device that measures voltage is commonly called a voltmeter. It can be analog or digital. Analog voltmeters use a needle and scale to display voltage readings, while digital voltmeters provide a digital reading. For accurate RMS voltage measurements, especially in AC circuits, the use of a digital multimeter with RMS capability is recommended.
To find an effective voltage, use a true RMS meter to measure the voltage across points of interest in the circuit. Effective voltage, or RMS voltage, is a measurement of AC voltage that produces the same power as an equivalent DC voltage. Make sure the meter is set to measure AC voltage if you are dealing with alternating current.
When measuring electrical voltage, several precautions must be observed:
- Make sure the multimeter is set to the correct voltage range for the expected measurement to avoid damage to the meter or incorrect readings.
- Use insulated probes and avoid direct contact with live wires to avoid electric shock.
- Check that the circuit is turned off before connecting or disconnecting the meter to avoid hazards.
- Follow the manufacturer’s instructions for safe and proper operation of the meter.
- Inspect the meter and probes for damage before use to ensure they are in good condition and capable of providing accurate readings.