2.3 Calibration
This function serves for the calibration of a sensor. The calibration process is different for each sensor type. Not all sensors can or must be calibrated.
For all sensors that can be calibrated, it is basically valid:
Only if ProfiLux has been calibrated with the connected sensor, correct values can be determined. The calibration is always necessary for new sensors. Also due to the aging process of a sensor, the calibration should be repeated from time to time. Please pay attention to the instructions of the sensor manufacturer. Before the sensor is dipped into a calibration fluid, the sensor has to be always dried carefully (blow out, shake, dry tissue)!
First the Calibration tolerance has to be entered (between 1 and 3) which is taken as a basis for the calibration. For old sensors it can occur that the measured value doesn’t sufficiently stabilize and a calibration is not possible. Under certain circumstances, through an increase of the calibration tolerance it is possible to adjust this
sensor although, of course at the cost of the accuracy of measurement. In principle, calibration processes should be carried out with the smallest possible calibration tolerance.
Afterwards, for certain sensors you have the possibility to change the values to which it shall be calibrated.
Now the calibration process itself follows, it depends on the type of the sensor.
pH-Sensor
First of all you are asked to dip the pH-sensor into a calibration fluid with the first calibration value. A subsequent pressing of RETURN starts the measurement process. After completion of the measurement you are asked to repeat the same procedure with a calibration fluid with the second calibration value. Also here the measurement process has to be started with RETURN.
More can be found here
http://support.aquariumcomputer.com/downloads/Programming guide_V507.pdf