AC/DC Measurement

Design Principles and Measurement Calculation Methods of Multimeters

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Design Principles and Measurement Calculation Methods of Multimeters

This article mainly introduces the design principles of digital multimeters and the calculation methods for average value and true RMS value, explaining the defects of the average value calculation method and the calculation method for true RMS value of AC signals superimposed with DC signals. It emphasizes the necessity of using multimeters with true RMS … Read more

How to Use a Clamp Multimeter to Measure Voltage, Current, and Resistance

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How to Use a Clamp Multimeter to Measure Voltage, Current, and Resistance

The clamp ammeter is composed of a current transformer and an ammeter. The core of the current transformer can open when the clamp is squeezed; the wire carrying the current to be measured can pass through the opening of the core without being cut. When the clamp is released, the core closes. The clamp ammeter … Read more