Basic Terms and Explanations of Multimeters
Accuracy: Refers to the difference between the measured value and the actual value of a digital multimeter. Expressed as a percentage of the reading or a percentage of the full range.
Analogmeter: An instrument that displays measured values using analog pointers. The user determines the reading by the position of the pointer during the travel.
Annunciator: Used to indicate that the selected range or function is incorrect.
Average Responding: It can measure sine waves accurately, but lacks precision when measuring non sine waves.
Count: The last digit after the * in a multimeter, often used together with percentages to indicate the accuracy of the multimeter.
Current shunt: In a digital multimeter, there is a low value resistor used to measure current. Measure the voltage at both ends of the digital multimeter and calculate the current value using Ohm's law.
Digital Multimeter (DMM): Display the value of a measurement signal in digital form. The characteristic of digital meters is that they have higher accuracy, resolution, reliability, and other indicators than analog meters.
Non sinusoidal waveform: waveforms such as pulse sequences, square waves, triangular waves, sawtooth waves, peak waves, etc.
Resolution: The small amount of variation that can be observed during measurement.
RMS: The measurement value of an AC signal equivalent to a DC signal.
Standard sine wave: a signal that changes in a sinusoidal pattern without distortion.
True rms: A digital multimeter that can measure the effective values of sine waves and non sine waves.
