Multimeter Terminology Explanation
Sinusoidal waveform: A signal that varies sinusoidally without distortion.
True-rms: A digital multimeter that can safely measure the rms of sine and non-sinusoidal waves.
Accuracy: Indicates the gap between the measured value of the digital multimeter and the actual value. Expressed as a percentage of reading or a percentage of full scale.
Current-shunt: A DMM has a low value resistor used to measure current. The digital multimeter measures the voltage across it and uses Ohm's law to calculate the current value.
DMM: Displays the value of the measured signal in digital form. The characteristic of the digital meter is that the accuracy, resolution, reliability and other indicators are higher than the analog meter.
Analogmeter: An instrument that uses analog pointers to display measured values. The user judges the reading by the position of the pointer in the stroke.
Annunciator: Multimeter Used to indicate selected range or function errors.
RMS: The measure of an AC signal equivalent to a DC signal.
Average Responding: It can measure sine waves, but the accuracy is not enough when measuring non-sine waves.
Count: The last digit of the digital multimeter, often used together with the percentage to indicate the accuracy of the digital multimeter.
Non-sinusoidal waveform: such as pulse train, square wave, triangle wave, sawtooth wave, peak wave and other waveforms.
Resolution: The smallest change value that can be observed in the measurement.
