3. Description
DEPOLOX® Pool Compact
14
EN
3.5.6 Auto tune (only applies to free
chlorine)
The electronics module is equipped with an
Auto tune function to facilitate commissioning
and optimize operation. The Auto tune pro-
gram automatically determines the control
parameters Xp and Tn for free chlorine cont-
rol.
The following requirements must be met:
•
pH value stably controlled and at the set-
point.
•
Positioner set to automatic (manual
wheel engaged)
•
Dosing pump set to automatic
•
Calibrated chlorine measurement (zero
point and DPD value)
•
Loop dead time < 60 min
•
Loop rise time < 480 min (8 h) for 0 to
100 % measurement range
•
Decomposition time < 480 min (8 h) of
the current measuring value to 20 % of
the 2x setpoint
•
Correct menu setting of the end value,
control direction (direct or inverse),
actuator (e.g. positioner), positioner run-
ning time.
Auto tune must not be started:
•
if a large volume of fresh water is being
added
•
if the measuring cell has not been run in
•
during cleaning work
•
during filter backwashing
•
while the circulation changes
•
during peak chlorination
Starting Auto tune
1 Switch to the main view.
2 Press the measurement “Chlorine” menu
field.
3 Press
the
symbol.
4 Press “Auto tune.” The loop parameters Tu
and Ts are displayed.
5 Press the “Start” button. The current
phase (13 in total) of Auto tune is
displayed.
6 Confirm successful Auto tune with “Auto
tune OK.”
7 Press the Home key to return to the main
view.
Error message during Auto tune
If Auto tune is not successful, the error mes-
sage “AUTO TUNE?" is displayed. The reason
for this may be problems with the dosing sys-
tem or loop times. Errors must be rectified in
order to carry out the Auto tune function. See
“Completing Auto tune with errors” on
page 15.
Various status messages can be read off,
depending on the selection of the actuator.
Different status messages also have different
execution times. Some status messages may
only be displayed briefly or not at all if the exe-
cution time is very short.
NOTICE
The control parameters Xp and Tn determi-
ned by the Auto tune program must be con-
sidered as a recommendation for first
commissioning! The control parameters Xp
and Tn can be optimized manually to ensure
maximum control quality.
T i m e
5 0 %
T u
0 %
1 0 0 %
m g / l C l
2
m e a s u r e m e n t
1 0 0 % d o s i n g r a t e
2 0 %
T s
T i m e
0 %
1 0 0 %
2x setpoint =
