Commissioning Liquisys M CPM223/253
60 Endress+Hauser
Timer for cleaning function
This function includes a simple cleaning option. You can set the time interval after which
cleaning should start. So you can only select a constant interval sequence.
Other cleaning functions are available for selection in conjunction with the Chemoclean
function (version with four contacts, see "Chemoclean function" section).
Timer and Chemoclean do not work independently of one another. While one of the
two functions is active, the other cannot be started.
Chemoclean function
Just like the timer function, Chemoclean can also be used to start a cleaning cycle. However,
Chemoclean also gives you the added option of defining different cleaning and rinsing
intervals.
As a result, it is possible to clean irregularly with different repeat cycles and to separately set
the cleaning times with post rinse times.
Pay attention to the following:
• To use the Chemoclean function the transmitter has to be equipped with a designated
relay board (see product structure or chapter "accessories").
• Timer and Chemoclean do not work independently of one another. While one of the two
functions is active, the other cannot be started.
• For the Chemoclean function, the relays 3 (water) and 4 (cleaner) are used.
• If cleaning is prematurely aborted, a post rinse time always follows.
• If the setting is "Economy", cleaning only takes place with water.
a0006794
Fig. 42: Correlation of cleaning time, pause time and hold dwell period
A
B
0
1
Wiper and/or spray cleaning system
Hold function
Inactive
Active
t
0
t
1
t
2
-t
1
t
3
-t
2
t
4
-t
3
Normal mode
Cleaning start
Cleaning time
Clean hold dwell period (0 to 999 s)
Pause time between two cleaning intervals
(1 to 7200 min)
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