Application note: Process control calibration made easy with Agilent U1401A
September 2009
Level Measurement & Control
Web exclusive – read the full article online.
Abstract
In today’s world, the 4–20 mA current loop is a common method of transmitting sensor information to a remote location in industrial process-monitoring applications. Physical parameters such as temperature, pressure, speed, and liquid flow rates in the manufacturing processes are converted into signal current 4–20 mA with a signal conditioner. The 4 mA current normally represents the sensor’s zero-level output, while the 20 mA represents the sensor’s full-scale output. However, transmitting a signal current over a long distance to another system with a different ground loop may cause serious signal disruption. Loop powered isolators will eliminate the ground loop in the control systems.
This application note explains how the Agilent U1401A with simultaneous source and measure functions eases technicians’ calibration tasks in industrial process control applications.
To read more about the full article, visit: http://instrumentation.co.za/+C13062
For more information contact Steve Alves, Concilium Technologies, +27 (0)12 678 9200, steve_alves@concilium.co.za, www.concillium.co.za
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