Stratos Multi E461N
236
Isothermal Intersection Point
The isothermal intersection point is the intersection of two calibration lines plotted for two different
temperatures. The coordinates of this intersection are labeled V
is
and pH
is
. The isothermal intersection
point remains constant for each sensor.
It may cause temperature-dependent measurement errors, but such errors can be avoided by
calibrating at the measuring temperature or at a constant, controlled temperature.
pHis
pH
mV
80 °C
25 °C
Vis
2
1
1
Isothermal intersection point
2
Zero point
