Evoqua DEPOLOX - Adaption (Only Applies for Free Cl )

118 WT.050.570.000.DE.IM.0714
Functions DEPOLOX
®
Pool
2.6
2.6.3 Adaption (only applies for free Cl
2
)
Fig. 36
Use Adaption is used for automatic determination of the reaction times of
the control loop (loop dead time Tu and loop rise time Ts) or the resul-
ting control parameters Xp and Tn.
NOTE
The control parameters Xp and Tn determined by adaption must be re-
garded as a recommendation for commissioning! The control parame-
ters Xp and Tn can be manually optimised for maximum control quality.
Prerequisites
 Positioner set to automatic (manual wheel engaged)
Dosing pump to automatic
 Calibrated Cl
2
measurement (zero point and DPD value)
 Loop dead time < 60 min
 Loop rise time < 480 min (8 h) for 0 ... 100 % measuring range
 Decomposition time < 480 min (8 h) of the current value to 20 % of
the measuring range
 Correct menu setting of the end value, control direction (direct or in-
vers), dosing equipment (e.g. positioner), positioner running time
(Ty)
Adaption must not be started:
 If a large volume of fresh water is added
 If the chlorine sensor has not been run in
 During cleaning work
 During filter backwashing
 When the circulation changes
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
W & T 0 0 0 4 9 E
2 0 %
T s
T i m e
0 %
1 0 0 %