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User Manual S200 WCS
Update August 2021
6 . 4 . 1 . 1 I n t e r r o g a t i n g t h e s l o p e / z e r o p o in t o f t h e p H p r o b e
The current slope and zero point deviation of the pH probe are displayed in the calibration
menu.
6 . 4 . 1 . 2 Ex p l a n a t i o n s lo p e o f p H p r o b e
A pH probe delivers a defined voltage per pH at 25°C. A new probe releases a maximum of
59.2 mV/pH at 25°C.
During operation, the slope of the probe is reduced over time. The displayed slope of the
probe is only recalculated after the calibration. As soon the slope falls below 50mV/pH, the
probe must not be used any longer. In case of a slope error, this error is displayed in the
status display in the start menu.
Note:
It is important for the calibration process that you ensure that the temperature
compensation is set to the correct buffer solution temperature.
6 . 4 . 1 . 3 Ex p l a n a t i o n z e r o p o i n t p H p r o b e
Physically, the zero point of a new pH probe is 0 mV.
This value can vary by +/- 25mV. During operation, the zero point changes in a positive or
negative direction. The zero point is recalculated during the next calibration. If the deviation
of the zero point e/- 58mV, the probe must not be used any longer. In case of a zero
point error, this error is displayed in the status display in the start menu.
6.5 Calibration Redox (Redox)
Terminal assignment
Wire
Function
Connection
Shielding
Reference electrode
Terminal 4
Inner conductor
ORP electrode
Terminal 5
4
5
6
7
