Execution - Bayrol PoolManager Series User Manual

12
Calibration (basic measurement comparison) Calibration (basic measurement comparison)
TIP
pH calibration
Precise calculation can be attained with the following Precise calculation can be attained with the following
procedure:
Basic calibration step 1
2-point calibration with buffer solutions pH 7 and point calibration with buffer solutions pH 7 and
pH 9 in order to calculate the exact electrode slope. pH 9 in order to calculate the exact electrode slope.
Basic calibration step 2
Subsequent 1-point calibration to the pool's pH value point calibration to the pool's pH value
with a photometer in order to attain the best with a photometer in order to attain the best
concordance possible between the device's display and possible between the device's display and
the photometer measurement.
This calibration should be performed as close to the This calibration should be performed as close to the
setpoint as possible, i.e. the pH value in the pool setpoint as possible, i.e. the pH value in the pool
should be in the ideal range between 7.0 and 7.4 should be in the ideal range between 7.0 and 7.4
If there is no photometer avail If there is no photometer available, then only step 1
should be performed. A simple colour tester does not should be performed. A simple colour tester does not
produce reliable calibration with the requisite precision. produce reliable calibration with the requisite precision.
Recalibration
1-point calibration generally suffices for regular point calibration generally suffices for regular
recalibration (at least once a month). If there is a recalibration (at least once a month). If there is a
photometer available, then recalibration should be tometer available, then recalibration should be
performed to the pool's pH value; otherwise with buffer performed to the pool's pH value; otherwise with buffer
solution pH 7.
12.2.1

Execution

pH calibration can be found in the following menu: pH calibration can be found in the following menu:
Calibration pH
Calibration is executed as follows:
Select 1-point calibration pH or 2-point calibration pH
•
Calibration is a menu sequence, i.e. it goes through a series of Calibration is a menu sequence, i.e. it goes through a series of
•
menus step-by-step.
12.2.1.1 Calibration input (1st and 2nd calibration point) Calibration input (1st and 2nd calibration point)
In the input menus for the 1st and 2nd calibration point, the following In the input menus for the 1st and 2nd calibration point, the following
parameters are displayed:
Calibration value pH
For the calibration value, enter the reference value to which calibration For the calibration value, enter the reference value to which calibration
should be performed.
When calibrating with a buffer solution, this will be the known pH value When calibrating with a buffer solution, this will be the known pH value
of the buffer solution, such as pH 7 or pH 9.
When calibrating to the pool water's pH value, this will be the value n calibrating to the pool water's pH value, this will be the value
measured with a photometer (a simple colour tester is not suitable for measured with a photometer (a simple colour tester is not suitable for
calibration as the measurement precision is not sufficient). calibration as the measurement precision is not sufficient).
Current value pH
This is the current measured value calculated using the parameters
from the last calibration, which are still valid. This value may deviate from the last calibration, which are still valid. This value may deviate
from the actual value under certain circumstances. It is only displayed from the actual value under certain circumstances. It is only displayed
to give you a certain level of orientation throughout calibration. to give you a certain level of orientation throughout calibration.
Using the measured value, you can see when measurement stablises asured value, you can see when measurement stablises
when you, for example, place the electrode into the buffer solution. when you, for example, place the electrode into the buffer solution.
Current signal pH
This is the currently measured electric signal on the electrode in [mV]. This is the currently measured electric signal on the electrode in [mV].
You can also use the measurement signal to see when measurement
has stablised.
Furthermore, you can use it to test the measurement signal for Furthermore, you can use it to test the measurement signal for
plausibility.
point calibration pH
calculated using the parameters
see when measurement
User Manual PoolManager
pH value 6.0 6.5
Typical +60 +30 +30
measurement mV mV
signal
Tolerance to be expected ±10%
pH Electrode slope (for 1-point calibration only) point calibration only)
For 1-point calibration, the electrode slope is also displayed in point calibration, the electrode slope is also displayed in
[mV/pH] and can be edited manually. This makes it possible for you to [mV/pH] and can be edited manually. This makes it possible for you to
enter a typical value for slope, or to reset slope to its default value. enter a typical value for slope, or to reset slope to its default value.
For 2-point calibration, slope cannot be entered as it is calculated point calibration, slope cannot be entered as it is calculated
exactly during calibration.
12.2.1.2 Calibration results
At the end of calibration, the calibration parameters generated are At the end of calibration, the calibration parameters generated are
displayed:
Electrode slope
For 2-point calibration, this is the newly point calibration, this is the newly calculated electrode slop in
[mV/pH]; for 1-point calibration this is the previously entered value. point calibration this is the previously entered value.
Offset
Offset is the zero point displacement calculated from calibration. It is Offset is the zero point displacement calculated from calibration. It is
indicated in [pH].
Current value pH
The pH measured value is then calculated using the parameters from The pH measured value is then calculate
the current calibration. The measured value displayed should therefore the current calibration. The measured value displayed should therefore
coincide with the calibration value entered. coincide with the calibration value entered.
12.2.1.3 Step by step
1-point calibration with buffer solution (e.g. pH 7) point calibration with buffer solution (e.g. pH 7)
1. Block the measurement water Block the measurement water
2. Separate the electrode cable from the device rode cable from the device
3. Unscrew the pH electrode from the measurement chamber Unscrew the pH electrode from the measurement chamber
4. Rinse the pH electrode off with (distilled) water Rinse the pH electrode off with (distilled) water
5. Carefully dab the pH electrode dry using a towel (free from Carefully dab the pH electrode dry using a towel (free from
grease and fuzz).
6. Connect the electrode cable to the device again. Connect the electrode cable to the device
7. In the menu, select the function 1-point calibration pH In the menu, select the function
8. Enter the pH value of the buffer solution as the Enter the pH value of the buffer solution as the calibration value
(generally pH 7)
9. If necessary, enter a value for electrode slope or reset the value If necessary, enter a value for electrode slope or reset the value
to default
10. Dip the pH electrode into the b Dip the pH electrode into the buffer solution (e.g. pH 7) and stir
it carefully
11. If the displayed measured value and the measurement signal If the displayed measured value and the measurement signal
have stablised and are no longer changing in a relevant have stablised and are no longer changing in a relevant
manner, then confirm calibration by pressing manner, then confirm calibration by pressing Next.
12. Check the calibration results displayed a Check the calibration results displayed and close calibration by
pressing Ready.
13. Place the pH electrode back into the measurement chamber Place the pH electrode back into the measurement chamber
14. Open the shut-off valves for measurement water off valves for measurement water
®
7.0 7.5 8.0 8.5
0 mV -30 mV -60 mV -90 mV
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