Commissioning
Liquisys M CCM223/253
60
Hauser
Three-point step controller
This controller is used for triggering motor valves for chlorine dosing.
• When the controller activates relay 3, the motor valve closes.
• When the controller activates relay 4, the motor valve opens.
a0002406-en
Fig. 42:
Function of the three-point step controller
A
Measured value is inside of the set point window
B
Measured value is smaller than the set point
C
Measured value is larger than the set point
W
Set point
X
Measured value
a0006793
Fig. 41:
Sequence of a cleaning cycle
A
B
C
0
1
Hold
Water
Cleaner
Contact on
Contact off
t
0
t
1
t
2
- t
1
t
3
- t
2
t
4
- t
3
t
5
- t
4
Normal mode
Cleaning start
Pre-rinse time
Cleaning time
Post rinse time
Hold dwell period
A
B
C
t
0
t
1
t
2
t
3
t
4
t
5
0
0
0
1
1
1
X
W
X < W
X > W
A
B
C
C
B
R4 mark-to-
space ratio
overdosed
underdosed
measuring signal
relay output
R3 mark-to-
space ratio
Summary of Contents for Liquisys M CCM223
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