How radio frequency identification tags will help retailers, from supply chains to store shelves.
Radio frequency identification technology is finally coming into its own. Wal-Mart, the nation's largest retailer, has asked suppliers to attach RFID tags to product shipment pallets by 2005 to automate tracking. EPCGlobal, an international organization helping to drive and implement the technology, is building a network in which every consumer item will have a tag and an electronic product code, or EPC. But drawbacks to RFID technology, including its high cost and concerns about consumer privacy, must be overcome before it finds widespread use. Here's how tracking with RFID tags is expected to work in the supply chain.
Voltage is the difference of electrical potential between two points of an electrical or electronic circuit, expressed in volts. It measures the potential energy of an electric field to cause an electric current in an electrical conductor.
Most measurement devices can measure voltage. Two common voltage measurements are direct current (DC) and alternating current (AC).
Learn the fundamentals of creating an AC or DC voltage measurement system. See how to properly connect the signals to your data acquisition system for accurate acquisition.
This document is part of the How-To Guide for Most Common Measurements centralized resource portal.
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