Operators Handbook DCU3 – System
5., Main Function „Calibration“
BAEDCU3 - Rev. 4.6 - 0504 5 - 11
5.8 Flow Calibration
The dosing control function of the DCU3 - system operates with a remote balance system, which
measures the weight of the substrate. The balance system is connected to the DCU3 - system via a
serial interface. By default the actually measured weight will be transmitted to the DCU3 every five
seconds. The menu has an optional manual refilling function. This allows the use of low cost balance
systems which offer only small weight ranges.
Connecting a balance system via the serial interface also allows for measuring external weights. At an
existing FLOW-CALIBRATION menu one remote balance with serial interface can be connected to the
DCU3 without hardware extensions. One extension allows for up to 12 measurements.
The system calculates the volume delivered per time, the „massflow“, considering the actual weight
measured with the balance and the spent time. To minimize disturbances the calculation is based
upon a „dynamic calculation“ of the mean value. All values measured within a passed interval of either
1 min, 10 min or 60 min will be considered. The user can select this interval according to the process.
5.8.1 Operating Display
Tag Entry Displayed value or function, required input
FLOW kg/h Display of actual flow
WEIGF kg Display of net weight
Refill Enabling the refill function
Reset Flow Reset of the displayed flow (enable start with „0.00“)
CYCLE Input of calculation interval (cycle)
1
− interval of 1 minute
10
− interval of 10 minutes (recommend setting)
60
− interval of 60 minutes
PV ALARM Enabling the alarm display
CLOOP Selection of the controller menu
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