Calibrating The Ph Sensor - ProMinent DULCOMETER Assembly And Operating Instructions Manual

Calibration
9.1

Calibrating the pH sensor

To ensure a high level of measuring accuracy, adjust the pH sensor at set time intervals.
This calibration interval seriously depends on the application of the pH sensor and on the
required measurement accuracy and reproducibility. The calibration interval can vary
between daily and every few months.
Valid calibration values
Assessment
Very good
Good
Acceptable
If you measure the pH with potential equalisation, set this [Potential equalisation]
procedure as a parameter when selecting the measured variable as a parameter.
Calibrate the pH-sensor for the function: pH compensation for chlorine meas‐
urement
It is mandatory that the pH measurement is always calibrated first, followed by the
chlorine measurement. Calibration of the chlorine measurement should always follow
every further calibration of the pH measurement, otherwise the chlorine measure‐
ment will be inaccurate.
62
Zero point
-30 mV ... +30 mV
-45 mV ... +45 mV
-60 mV ... +60 mV
Slope
56 mV/pH ... 60 mV/pH
56 mV/pH ... 61 mV/pH
55 mV/pH ... 62 mV/pH