Liquid Dosing Control Manual
9.17.150 rev A – September 2020
Page
13
of
34
Example
The ratio of liquid to be dosed is 1:25.
Capacity Value Master
1,000 kg / hr (100%)
Capacity Value Slave
200
gr
/ hr (100%)
Ratio
1:10,000
At 100% Master flow, a dosage of 1:10,000 for 1,000 kg = 100
gr
100 gr = 50% of the Slave Capacity
Slave Factor =
50
Or, by adjusting the Capacity Value (100% - point) of the instrument to
100 gr / hr, the factor changes to:
Slave Factor =
100
To start dosing
Write determined factor
-
Write value <_> to parameter 139 – Slave Factor
(0 – 500%)
Read instrument internal calculated setpoint
Defined as Analog Input x Slave Factor
- Read parameter 9 – Setpoint
(Measure 0 – 32000)
Step DDE ProPar Name
Data
Type Execute Value
Remark
Control Mode
1
12
1/4
Control Mode
Uint8 write
10
Analog Slave Operation.
Factor
2
11
1/3
Analog Input
Sint16 read
0-32000 Measure of master
3
139 33/1
Slave Factor
Float write
xx
0 – 500%
4
9
1/1
Setpoint
Uint16 read
Analog Input * Slave Factor
2.2.9 Batch dosing specific configuration settings
Generic dosing settings
Due to the potential complexity of batch dosing applications and the high amount of optimization
possibilities this section is limited to generic settings regarding batch dosing.
For more detailed information and background information, please refer to the Batch Dosing
information in the applicable Instruction Manuals:
-
– Instruction Manual mini CORI-FLOW ML120, chapter 5
-
– Instruction Manual CORI-FILL
Dosing Principles
(explained in more detail in referenced documents)
At the start of each batch, the flow is initiated by opening a valve (or starting a pump). The
flow meter measures and totalizes the flow, continuously calculating the current batch size
