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A digital multimeter (DMM) is the first tool most of us reach for when troubleshooting an electrical issue. It provides a variety of measurement features that can help isolate a problem or narrow down the list of potential issues. Troubleshoot Transient Voltages in VFDs Using a Digital MultimeterWhen troubleshooting a variable frequency drive (VFD), a multimeter is an excellent tool to start with. Variable frequency drives are motor controllers that vary the frequency and voltage of power supplied...

TechGirls is a not-for-profit lab conducting social and scientific research about women’s labor market participation in Science, Technology, Engineering, and Mathematics (STEM) fields. To extend their reach and help more people, TechGirls collaborates with artists and communities to present their study findings in a beautiful, accessible, and compelling way. Saadia Muzaffar, President and co-founder, along with their sibling (and co-founder) Saira Muzaffar, saw and heard the everyday career struggles...

Motor control systems used in critical manufacturing processes are becoming increasingly complex, which makes it more challenging than ever to keep them at peak performance. Equipment failure is expensive, whether due to the cost of replacing parts or lost production.The Fluke 378 FC Non-Contact Voltage True-RMS AC/DC Clamp Meter tests 3-phase voltage and current and detects power quality issues—all with one tool.Because motor failure can cause mechanical and electrical issues, it is important...

Adjustable speed drives (ASDs) can be both a source and a victim of poor power quality.

In every industry, from petrochemical refining to aerospace manufacturing, accurate measurements form the backbone of operational safety, efficiency, and quality assurance. However, no measurement is free from uncertainty (i.e., the statistical degree of confidence in how close a measurement is to the “true value”). Whether assessing temperature fluctuations in a reactor or calibrating critical instruments, understanding the different types of uncertainty is crucial for making informed decisions.This...

Uncertainty analysis is a critical step in calibration that sheds light on the accuracy of any measurement tool. As such, it can be critical to understanding the true performance and health of whatever components or systems a measurement tool is testing. In this article, we’ll review how uncertainty analysis relates to calibration, why it’s important to a proper calibration process, and how to set your calibration services up with a good uncertainty analysis process in mind. What Is Uncertainty...

Technicians and other experts who work with electrical systems use clamp meters in a variety of settings, from testing products on the manufacturing floor to troubleshooting residential electrical systems. Professionals rely on these tools to measure electrical current and trust that their devices will make accurate assessments so they can do their jobs safely.Over time, clamp meters will lose accuracy and no longer measure within the manufacturer’s specifications (specs). By periodically calibrating...

Calibrating thermometers is a critical process that ensures accurate temperature measurements, whether for industrial processes, scientific research, or food safety compliance. One popular approach is the ice point method, a straightforward technique that uses the freezing point of water (0 °C, 32 °F) as a reference. While convenient, this method falls short for professionals in industries utilizing temperature sensors who require traceable, multi-point calibration to meet rigorous calibration...