12
Calibration (basic measurement comparison)
Using the measured value, you can see whether measurement is
sufficiently stable for reliable calibration.
12.3.1.2 Calibration results
At the end of calibration, the calibration parameters generated are
displayed:
Offset Chlorine
Offset is the zero point displacement calculated from calibration. It is
indicated in [mg/l].
Current Value Chlorine
The chlorine/bromine mea
sured value is then calculated using the
parameters from the current calibration. The measured value
displayed should therefore coincide with the calibration value entered.
12.3.1.3 Step by step
Calibration to the measured DPD value
26. Take a water sample from the mea
calculate the chlorine/bromine value using a photometer
(DPD1 method).
27. In the menu, select the function
28.
Enter the pool water's DPD value calculated as the
Cl (DPD 1 value)
29. If the measured value displayed and t
stable and are no longer changing in a relevant manner, then
confirm calibration by pressing Next.
30.
Check the calibration results displayed and close calibration by
pressing Ready.
12.3.2 Calibration errors
During calibration, various
plausibility criteria are checked. If one of the
criteria is not met, then a corresponding error message appears and
calibration is not executed.
The following criteria have to be met for successful calibration:
•
Calibration must be performed for a calibrat
(DPD values) of at least 0.20 mg/l.
•
The offset calculated (zero point displacement) has to be in the
range of ±1.00 mg/l. The offset is generally close to 0 for flawless
electrodes.
•
The slope calculated has to be in the range of 1µA/mg/l
250 µA
/mg/l. For flawless electrodes, slope is generally in the
range of 5µA/mg/l and 20µA/mg/l.
Calibration (basic measurement comparison)
User Manual PoolManager
®
Using the measured value, you can see whether measurement is
At the end of calibration, the calibration parameters generated are
Offset is the zero point displacement calculated from calibration. It is
sured value is then calculated using the
parameters from the current calibration. The measured value
displayed should therefore coincide with the calibration value entered.
calculate the chlorine/bromine value using a photometer
Enter the pool water's DPD value calculated as the
Cal. Value
stable and are no longer changing in a relevant manner, then
Check the calibration results displayed and close calibration by
plausibility criteria are checked. If one of the
criteria is not met, then a corresponding error message appears and
The following criteria have to be met for successful calibration:
Calibration must be performed for a calibrat
ion value
The offset calculated (zero point displacement) has to be in the
range of ±1.00 mg/l. The offset is generally close to 0 for flawless
The slope calculated has to be in the range of 1µA/mg/l
–
/mg/l. For flawless electrodes, slope is generally in the
12.4
The calibration for redox measurement is performed as 1
calibration. A buffer solution with a known redox value (e.g. 465 mV) is
used.
TIP
Depending on water quality and the state of the
electrode, it can occur that the redox electrode reacts
very slowly if it is moved from the buffer solution back
into the measurement water after calibration. In
until the measured redox value stablises again and is
During that time, reasonable configuration and launch
of redox control is not possible.
Therefore, it is recommended to only perform redox
calibrati
on when necessary, such as when it is
suspected that the electrode could be defect.
In general, calibration can be omitted for the following
reasons in order to avoid potential problems with the
time it takes to function properly again:
tolerance range, such that calibration only changes the
display value by a few mV.
The absolute redox value is not of significant important.
Assigning the redox value to the chlorine value in the
pool is more important; see
12.4.1 Execution
Redox (mV) calibration can be found in the following menu:
Calibration mV (Redox)
Calibration is executed as follows:
• Selection 1-
•
Calibration is a menu sequence, i.e. it goes
menus step-by-step.
12.4.1.1 Calibration input
The following parameters are displayed in the calibration menu:
Calibration mV (Redox)
For calibration value, enter the reference value for calibration, i.e. the
redox value of the buffer solution b
Current value Redox (mV)
This is the current measured value calculated using the parameters
from the last calibration, which are still valid. This value may deviate
from the actual value under certain circumstances. It is only disp
to give you a certain level of orientation throughout calibration.
Using the measured value, you can see when measurement has
stablised when you place the electrode into the buffer solution.
36
The calibration for redox measurement is performed as 1
-point
calibration. A buffer solution with a known redox value (e.g. 465 mV) is
Depending on water quality and the state of the
electrode, it can occur that the redox electrode reacts
very slowly if it is moved from the buffer solution back
into the measurement water after calibration. In
tions, it may take several hours
until the measured redox value stablises again and is
During that time, reasonable configuration and launch
of redox control is not possible.
Therefore, it is recommended to only perform redox
on when necessary, such as when it is
suspected that the electrode could be defect.
In general, calibration can be omitted for the following
reasons in order to avoid potential problems with the
time it takes to function properly again:
lectrodes generally have a tight
tolerance range, such that calibration only changes the
display value by a few mV.
The absolute redox value is not of significant important.
Assigning the redox value to the chlorine value in the
pool is more important; see
section
Redox (mV) calibration can be found in the following menu:
Calibration is executed as follows:
Calibration is a menu sequence, i.e. it goes
through a series of
The following parameters are displayed in the calibration menu:
For calibration value, enter the reference value for calibration, i.e. the
redox value of the buffer solution b
eing used (e.g. 465 mV).
This is the current measured value calculated using the parameters
from the last calibration, which are still valid. This value may deviate
from the actual value under certain circumstances. It is only disp
layed
to give you a certain level of orientation throughout calibration.
Using the measured value, you can see when measurement has
stablised when you place the electrode into the buffer solution.
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