Bronkhorst CORI-FILL - Manual (Page 11)

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Bronkhorst Cori-Tech BV
11
5.2 Adjust instrument capacity (FS range)
be adjusted easily.
At [Capacity and unit] a full scale value can be entered with digits or by using the
slider. Depending on the instrument the full scale value will be a value between a
minimum and a maximum capacity.
The full scale value will be indicated as 100% value in FlowPlot.
Analog output signals will be re-scaled for this new capacity.
E.g. 4-20mA: 20 mA corresponds to FS capacity value (100%).
The flow value to be used for filling can be calculated as follows:
Flow speed = batch / dosing time.
Examples:
If you would like to dose a batch of 10 g in 2 seconds, the flow speed will need to
be:
Flow = (10 g / 2 sec) * 3600 sec = +/- 18000 g/h (M14)
If you would like to dose a batch of 500 mg in 10 seconds, the flow speed will
need to be:
Flow = (0.005 g / 10 sec) * 3600 sec = +/- 180 g/h (M13)
Please mind that this is a theoretical approach, it is meant to give you an indication of the full scale value. In
practice the full scale value will need to be a little higher, because of the opening and closing time of the actuator.
The “counter control gain” value will also influence the total dosing time. This function is explained in section 8.
Please note this can only be used for proportional filling.
When a shut-off valve is used, the inlet pressure will determine the flow rate. Therefore it is very important to use a
correct and stable inlet pressure.