Operation
Liquiline System CA80HA
148
Hauser
Example: 2-point chlorine regulator with volume flow monitoring
A relay output activates a dosing pump. The pump should switch on when the following 3
conditions are met:
• (1) There is flow
• (2) The volume flow is above a defined value
• (3) The concentration of chlorine drops below a defined value
1. Connect a binary input signal from an "INS" point level switch of the CCA250 assembly
to the DIO module.
2. Connect an analog input signal of a volume flow meter to the AI module.
3. Connect the chlorine sensor.
4. Configure the
Formula
mathematical function:
Source A
= binary input DIO,
Source B
=
current input AI,
Source C
= input
Disinfection
.
Formula:
A AND (B > 3) AND (C < 0.9)
(where 3 is the lower limit value of the volume flow and 0.9 is the lower limit value
of the chlorine concentration)
5. Configure the relay output with the
Formula
mathematical function and connect the
dosing pump to the corresponding relay.
The pump is switched on if all 3 conditions are met. If one of the conditions is no longer met,
the pump is switched off again.
Instead of outputting the result of the formula directly to a relay, you can also connect a
limit switch in between in order to attenuate the output signal via a switch-on and switch-off
delay.
Example: Load-based control
The load - i.e. the product of the concentration and volume flow - is needed for the dosage of
precipitants, for instance.
1. Connect the input signal of a phosphate analyzer to the AI module.
2. Connect an analog input signal of a volume flow meter to the AI module.
3. Configure the
Formula
mathematical function:
Source A
= input signal phosphate and
Source B
= input signal volume flow.
Formula:
A*B*x
(where x is an application-specific proportionality factor)
4. Select this formula as the source e.g. of the current output or of a modulated binary
output.
5. Connect the valve or pump.
10.8.6 Diagnostic modules
Here you can configure a maximum of 8 individual diagnostic messages.
Summary of Contents for Liquiline System CA80HA
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