5.5.4
Chemoclean function
Just like the timer function, Chemoclean can
also be used to start a cleaning cycle. By
comparison, the function scope is extended
by an option for defining cleaning and rinsing
intervals.
Thus, irregular cleaning with different repeat
cycles is possible, and cleaning times with
post-rinse times can be individually defined.
Note:
•
The Chemoclean function is only
available with relays 3 (water) and
4 (cleaner).
•
Interruption of the cleaning
process is always followed by a
post-rinse time.
•
When “Economy” is selected,
cleaning is performed with water
only.
CHEMO.CDR
t
1
Cleaning trigger
t
2
t
1
Pre-rinse time
t
3
t
2
Cleaning time
t
4
t
3
Post-rinse time
t
5
t
4
Hold delay time
Hold
Water
Cleaner
t
0
t
1
t
3
t
2
t
5
t
4
Fig. 5.11
Sequence of a cleaning
cycle
Coding
Field
Selection or range
Factory setting
Display
Info
R
Function group
RELAY
Relay contacts can be selected
and adjusted.
R1
Selection of
contact to be
configured
Rel1
Rel2
Rel3
Rel4
Rel3 (water) and Rel4 (cleaner)
are only available on an
instrument equipped
accordingly. (If Chemoclean is
selected as the cleaning type,
Rel 4 is not available.)
R2 (1)
Configure limit
contactor for O2
LC PV
=
Limit
contactor O
2
(1)
GW °C = Limit
contactor T (2)
PID controller (3)
Timer (4)
Clean = Chemoclean (5)
PV= process value
Confirmation with ENTER
switches off a different, already
switched-on relay function and its
settings are reset to the default.
Selecting Rel 4 in Field R1 means
that Clean=Chemoclean cannot
be selected
R
RELAY
Rel1
R1
Sel.Relay
LC PV
R2
Sel. Type
Instrument configuration
Liquisys M COM 223 / 253
40
Hauser
