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Article: Solid-state simplifies multiple pressure point measuring, control. (Application Update).(Brief Article)
- Article from:
- Control Engineering
- Article date:
- February 1, 2002
- Author:
CopyrightCOPYRIGHT 2002 Reed Business Information, Inc. (US). This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Measurement and control of multiple pressure points is a common application. Typically, four pressure points require as many as 12 different pieces of hardware. This same goal can be accomplished with one solid-state pressure switch, which can save both time and money.
A duplex pump control system, for example, requires control logic based on four pressure settings with low- and high-pressure alarms and activation of either the leading or lagging pump.
Traditional systems use either four individual or two duplex electromechanical pressure switches. Visual display is supplied by a pressure gauge, while a transmitter is added to provide a remote 420 mA ...