Tag: Electrical instrumentation
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Distortion Meter: Function, Components & Controls
The Function of a Distortion Meter A distortion meter is used to measure the total harmonic distortion content in an input waveform. The rms level of the distortion is usually measured as a percentage of the rms level of the complete waveform. Alternatively, a decibel measurement may be employed. A sine wave input to an…
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How to Calibrate a DC Ammeter using a Potentiometer
We can calibrate a dc ammeter by connecting it in series with a precision resistor/standard resistor, and accurately measuring the resistor voltage drop. The level of ammeter current is determined by dividing the resistor voltage drop by its resistance value. When the resistor value is known precisely, and the voltage drop is measured by a…