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T&M White Paper: Cable & Connector Test System Facilitates Multi-Point High Voltage/Current Testing
Introduction Hipot testing is critical in assuring compliance with a host of electrical safety standards and in confirming the assembled product is free from electrical or mechanical defects. Hipot testers are used to measure leakage current and insulation resistance between all components and connections, confirm solid ground connections and test ground bonds. All of these tests require the sequential application of precise and controlled high voltages or currents between pairs of elements then accurately measuring and recording the results. Products like the Vitrek 95x and V7X series are excellent examples of the industry's best electrical safety testers. [...]
White Paper: Fundamentals of Electrical Safety Testing-TEQ
Part 1 - Functions & Features of Advanced Hipot Testers Introduction Electrical safety testers - often referred to as "hipot" testers - are an integral part of electrical and electronic equipment manufacturing. Hipot testers get their name from the high potential (high voltage) they produce to perform dielectric withstand and insulation resistance tests. In addition to these tests, many hipot testers provide accurate low-resistance measurements and low-resistance/high-current outputs to test ground resistance and ground bond integrity. Hipot testing has long been a standard procedure for assuring the electrical safety of electronic equipment. Early commercial hipot testers were actually [...]
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GaGe White Paper: ENOB: The Best Digitizer Performance Metric – T&M Magazine
Introduction Figure 1. GaGe High-Speed Digitizers including PC Oscilloscope Software, powerful SDKs for custom application development and turnkey integrated PC-based measurement systems. While the nominal vertical resolution of a high-speed waveform digitizer (specified in bits) is often promoted, its true performance is provided by its measured Dynamic Parameters and in particular by its Effective Number of Bits (ENOB). This article describes measurement of the Dynamic Parameters and presents measurements for a leading-edge GaGe 12-bit Digitizer. A widely used digitizer-like device, the Digital Storage Oscilloscope (DSO), is optimized for the visualization of unknown signals. The relatively [...]
White Paper: High Accuracy, High Voltage Measurement – T&M Magazine
Introduction One of the first principals learned as an engineering student is the “observer effect” which states that simply observing a situation or phenomenon necessarily changes that phenomenon. This is often the result of instruments that, by necessity, alter the state of what they measure in some manner. Accurate high-voltage measurement is a clear example of the validity of this theory. The accuracy of the resulting measurements is affected by three important elements: environmental factors, errors that are introduced by the measurement probe, and the intrinsic accuracy and performance of the measuring instrument. This article will address each of [...]