Direct mA Input Control
The Wallace & Tiernan Products direct mA input positioner is available for remote or simple automatic control of a gas feed system or metering pump. This positioner accepts a 4-20 mA input signal from a remote manual control station, SCADA, or other centralized control system. An integral dosage function provides for dosing an input from a flow transmitter.
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SCU Signal-Conditioning Unit
The Wallace & Tiernan Products micro-processor- based SCU (Signal Conditioning Unit) provides automatic flow paced control of feed rate for gas feed systems and metering pumps. The SCU controller is specifically developed for chlorination/dechlorination and chemical feed systems. It is also ideal for remote manual con-trol of a chlorinator or metering pump or it can be used to dose the flow input on a metering pump’s SCR variable speed drive.
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PCU Process-Control Unit
Wallace & Tiernan Products micro-processor- based PCU (Process Control Unit) is specifically designed for auto-matic residual or compound loop con-trol of disinfection, dechlorination and chemical feed in any water conditioning or industrial process application. Typically used as a setpoint controller, the PCU provides accurate control of gas feed equipment as well as chemical metering pump stroke length or variable speed drive applications. Easy operation, setup and calibration using menu-struc-tured electronics make sophisticated control functions simple with the PCU.
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