Why is RMS so important for clamp meters?
When choosing a clamp meter, we often pay more attention to the accuracy of the meter and whether it is accurate. There are many factors that affect the accuracy of a clamp meter, such as design/process, bandwidth, frequency response, etc., including whether the appropriate range is selected, which can affect the reading. However, of all these factors, one of the most important is the measurement of true rms, especially for industrial users with a wide range of electrical equipment and complex electrical environments.
The non-RMS value, that is, the average value of the instrument response, is mainly used for the measurement of standard power frequency sine waves. A common implementation principle is to convert the arithmetic mean reading x1.1 of the measurement to a sine wave "rms" reading. In simple environments that are electrified, this is no problem, such as buildings and property.
Why is RMS so important for clamp meters?
In a wider industrial environment, especially the use of more and more frequency conversion, rectifier, inverter and other equipment, the actual waveform is more and more diverse, and even more and more high-frequency noise is introduced. Therefore, for accurate measurement, the true rms value becomes one of the most important factors.
Why is RMS so important for clamp meters?
When it comes to noise or harmonics, we have to talk about another important concept: the low pass filter (LPF). This means that only low-frequency currents and voltages can be measured, and the high-frequency parts do not need to be calculated. It can be said that only clamp meters with real low-pass filtering are truly valuable "true RMS".
