KROHNE SMARTSENS PH 1590 EN - Manual (Page 29)

TECHNICAL DATA
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SMARTSENS PH 1590
www.krohne.com 11/2013 - 4002545902 - MA SMARTSENS PH 1590 R02 en
The voltage change of a pH sensor at 25°C / 77°F is around 59 mV for each pH unit. This is also
called the slope of the pH sensor. The slope is temperature dependent and decreases over life
time of the sensor. For further details on the pH value as a function of voltage and on the
temperature dependency, please refer to the appendix of this manual.
To compensate for the temperature dependency of the pH measurement, the temperature of the
medium can be measured and automatically compensated in the signal converter.
Figure 6-2: Optimal slope at 25°C / 77°F
Figure 6-3: Temperature dependency of the slope
.book Page 29 Wednesday, October 30, 2013 11:35 AM