Operators Handbook DCU3 – System
6., Main function „Control Loops“
BAEDCU3 - Rev. 4.6 - 0504 6 - 26
6.16 Dosing Pump Controller
The implemented dosing pump controller can control an external, continuous pump for the addition of
nutrient solution. The dosing pump control function provides a setpoint control of the external pump
(remote control) and transmits the analog setpoint signals to the pump. It also displays the measured
signal for the flowrate if the pump is equipped with an output for measured signal.
Above this the extended functions of the DCU3 - system allow the specification of time profiles for set-
points as well as recipe-dependent setpoints for the external pump.
6.16.1 Operating Display
For a description of the tags, the physical units or entries, the displayed value or function
and of the required inputs see the table in section 6.3, Controller Operation in General.
6.16.2 Special Notes
External pumps, like a FE 211, 411, etc., can be connected via corresponding signal cables.
Commercially available laboratory pumps can be connected when they have a remote set-
point input for signals of 0 ... 0 V, 0 ... 20 mA.
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