7.3 Calibrate
Necessity for calibrating the zero point
Calibration of the zero point is not generally neces‐
sary. A calibration of the zero point is only neces‐
sary if the sensor is operated at the lower limit of
the measuring range or if the 0.5 ppm sensor ver‐
sion is used.
Although various calibration methods are possible with the fitted
controller, when used as a swimming pool controller, we generally
recommend the 2 point calibration of the pH sensor and the cali‐
bration of the gradient with the chlorine sensor.
You have to regularly calibrate the pH sensor
during operation. That means: 24 hours after initial
calibration and then weekly thereafter.
Please take into account any deviating national
regulations.
Only calibrate the pH sensor with the quality buffer
solutions pH 7 and pH 4.
WARNING!
Danger from hazardous substances!
Possible consequence: Fatal or very serious inju‐
ries.
Please ensure when handling hazardous sub‐
stances that you have read the latest safety data
sheets provided by the manufacture of the haz‐
ardous substance. The actions required are
described in the safety data sheet. Check the
safety data sheet regularly and replace, if neces‐
sary, as the hazard potential of a substance can be
re-evaluated at any time based on new findings.
The system operator is responsible for ensuring
that these safety data sheets are available and that
they are kept up to date, as well as for producing
an associated hazard assessment for the worksta‐
tions affected.
There must be a chlorine concentration of approx. 0.5 mg/l in the
pool to be able to calibrate the sensors.
Example (without depletion losses): A swimming pool contains 60
m
3
, by way of example. To obtain a chlorine concentration of 0.5
mg/l in this swimming pool, approx. 0.20 litres of 12% sodium-cal‐
cium hypochlorite (density (ρ) 1.22 ± 0.02) are required.
Meter in the required quantity of sodium-calcium hypochlorite
into the filtration circuit, either using the chlorine metering
pump or evenly distribute the quantity of sodium-calcium
hypochlorite needed into the swimming pool using a meas‐
uring cup
ð
An even concentration can be expected once the reac‐
tion time has elapsed:
Reaction time [h] = pool contents [m
3
] / circulation
capacity [m
3
/h]
Preparing the filtration circuit
Start up
33
Summary of Contents for DULCODOS Pool Comfort
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