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11
Measurement, control, dosage
(pH value, redox value, chlorine/bromine)
User Manual PoolManager
®
28
10.2.4
Active oxygen (BayroSoft)
INFO
This section applies for the model PoolManager
®
O2
only.
For disinfection with active oxygen, an main dosage is performed
automatically once a week in order to initially raise the pool's oxygen
content to a high level, thereby yielding a strong disinfection effect.
Then additional interim dosages are performed throughout the course
of a week as needed in order to maintain the oxygen level
continuously over the requisite minimum value that ensures safe and
reliable disinfection.
The volumes for the main dosage and the interim dosages are
automatically adjusted to the average pool temperature in order to
compensate for heavier product attrition at higher temperatures. This
function is called temperature compensation.
11
Measurement, control, dosage
(pH value, redox value, chlorine/bromine)
INFO
The information in this section on measuring and
controlling the redox value applies only for the models
PoolManager
®
Cl and PoolManager
®
Br.
The information for measuring and controlling the pH
value applies for all PoolManager
®
models, i.e. also for
PoolManager
®
O2.
IMPORTANT NOTICE!
Need for calibration
Correct calibration of pH measurement and, if
applicable, redox measurement is an absolute
requirement for exact and reliable measurement and
control.
Please refer to the information in the section
Calibration
.
11.1
Function
Measurement and control for the pH value, free chlorine/bromine, and
for the redox value are set-up as identically as possible.
PoolManager
®
continuously measures the pH value and the current
redox value in the pool and compares the current measured values
with the desired levels, which are configured as setpoints.
PoolManager
®
PRO continuously measures the pH value and the
concentration of free chlorine/bromine in the pool and compares the
current measured values with the desired levels, which are configured
as setpoints.
If there is a deviation between the current measured value and the
setpoint, a so-called rule deviation, then PoolManager
®
activates the
corresponding dosage pump (or other dosage equipment) in order to
adjust quickly and precisely.
11.2
Dosage rate
The controller continuously calculates the optimal dosing output in the
current situation. The farther the current measured value is from the
setpoint, the higher the configured dosing rate is.
Dosing rate is indicated as a percentage [%]. A dosing rate of 100%
means that the dosage pump is running continuously. The absolute
dosing rate in l/h is yielded from the pump type used and/or the
dosage hose used.
For lower dosing rates, the controller periodically turns the dosage
pump on and off within a predefined dosage cycle (e.g. 60 s). For
example, a dosing output of 10% means that the dosage pump runs
10% of the available time within a dosage cycle, and stands still during
90% of the time.
Example:
•
The dosage cycle is set to 60 s.
•
The current dosing rate is 10%.
The pump's running time will then be 10% of 60s, i.e. 6s.
The pump's off time will then be 90% of 60s, i.e. 54s.
The following figure shows cyclical turning on and off of dosage pumps
for various dosing outputs.
1
Dosage pump running (on)
2
Dosage pump not running (off)
3
Dosage cycle (for example, 60s)
4
dosing output 10% / 50% / 90% / 100%
5
Time axis