Calibration Procedure; Calibration Chlorine (Cl) / Bromine (Br)); Calibration Errors - Bayrol PoolManager Chlorine User Manual

13 Calibration (basic measurement adj
13.3 Calibration chlorine (Cl) / bromin
INFO
PoolManager ® PRO only
Calibration for free chlorine / bromine measurem
point calibration. The pool water's DPD measur
reference value. It can be measured using a ph
a simple colour test can be used. However, th
due to the limited precision.
IMPORTANT NOTICE!
Calibration near to setpoint
For reliable and precise calibratio
measurement, this has to be per
desired setpoint as possible.
• First bring the chlorine / bro
the pool to the desired level
dosing or manual addition.
• Check the value via DPD me
• Do not perform calibration
pool is close to the desired s
tolerance approx. setpoint ±1
IMPORTANT NOTICE!
Calibration for bromine
Bromine concentration and chlo
be calculated using DPD measu
same colour on the DPD sam
values for chlorine and bromine.
• If your photometer / colour te
bromine measurement, the
bromine value read directly.
• If your photometer / colour
chlorine measurement, then
the chlorine value by 2.2 i
correct bromine value (e.g. D
chlorine displays 1.0 mg/l
INFO
Internal 2.point calibration
Even if you only have to enter
Analyt internally performs a prec
The second calibration point used
the potentiostatic measurement,
constant.
13.3.1

Calibration procedure

Chlorine / bromine calibration can be found in th
- - * ,
Calibration is carried out as follows:
•
Select - -
•
Calibration is a menu sequence, i.e. it go
menus step'by'step.
13.3.1.1 Calibration Data
The following parameters are displayed in the C
Calibration value
Enter the measured DPD value as the calib
close to setpoint!).
adjustment)
ine (Br))
rement is performed as 1'
sured value is entered as
photometer. Alternatively,
this is not recommended
ation of chlorine / bromine
performed as close to the
romine concentration in
vel (=setpoint) via manual
measurement
n until the value in the
d setpoint (recommended
t ±10%)
hlorine concentration can
asurement. However, the
sample means different
r tester explicitly supports
then you can use the
lour tester only supports
en you have to multiply
2 in order to obtain the
g. DPD measurement for
bromine 2.2 mg/l).
ter one calibration point,
recise 2'point calibration.
sed is the zero point from
nt, which is always nearly
n the following menu:
goes through a series of
Calibration menu:
alibration value (calibrate
Current value
This is the current measured val value calculated using the parameters
from the last calibration, which ar are still valid. This value may deviate
from the actual value. It is only dis displayed to give you a certain level of
orientation throughout calibration. n.
Using the measured value, you ou can see whether measurement is
sufficiently stable for reliable calibr libration.
13.3.1.2 Calibration results
At the end of calibration, the ca calibration parameters calculated are
displayed:
Offset
Offset is the zero point shift calcu lculated from calibration. It is indicated
in [mg/l].
Current value
The chlorine / bromine measured red value is now calculated using the
parameters from the current t calibration. The measured value
displayed should therefore be c consistent with the calibration value
entered.
13.3.1.3 Step by step
Calibration to the measured DPD DPD value
1. Take a water sample from t m the measurement chamber and
calculate the chlorine / brom romine value using a photometer
(DPD1 method).
2. In the menu, select the func unction -
3. Enter the pool water's DPD PD value calculated as the
;
4. If the measured value displa splayed and the -
stable and are no longer ch changing in a relevant manner, then
confirm calibration by press ssing ( 9
5. Check the calibration results ults displayed and close calibration by
pressing > '$
13.3.2

Calibration errors

During calibration, various plausib sibility criteria are checked. If one of the
criteria is not met, then a corresp esponding error message appears and
calibration is not executed.
The following criteria have to be m e met for successful calibration:
•
Calibration must be performed med for a calibration value (DPD value)
of at least 0.20 mg/l.
•
The offset calculated (zero p o point shift) has to be in the range of
±1.00 mg/l. The offset is is generally close to 0 for flawless
electrodes.
•
The slope calculated has t s to be in the range of 1[A/mg/l –
250[A/mg/l. For flawless el electrodes, slope is generally in the
range of 5[A/mg/l ' 20[A/mg mg/l.
-
! are
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