Proceq PM8500 User Manual page 35

The theoretical potentials of the Cu/CuSO
- Cu/Saturated CuSO
- Saturated Calomel 
The potential difference that theoretically should be read on the PM8500 is given by:
ΔE = E1 – E2,
E : potential of the reference electrode
1
E : the theoretical potential of the electrode to be checked.
2
242mV – 316mV = -74mV
The measuring value depends also on the temperature. Temperature drift is calculated:
Cu/Saturated CuSO
Saturated Calomel 
25. September 2023
Figure 31 : Calibration Check. Rod and Wheel Electrodes
+ 316 mV*

4
+ 242 mV*
*(at 25°C, regard to the standard hydrogen reference electrode)
+0.90mV/°C

4
- 0.76mV/°C
1.66mV/°C
© Copyright 2023, PROCEQ SA
and Calomel electrodes are the following:
4
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