Sper Scientific 850037 Large Display Conductivity Pen - Manual (Page 49)

49
Note…
The correction is accurate only within a
limited temperature range around T1 and
T2. The greater the difference between T
and Tref, the higher the risk of error.
Calculating Temperature Coefficients (θ)
By measuring the conductivity of a
sample at temperature T1 close to Tref
and another temperature T2, you can
calculate the temperature coefficient by
using the following equation:
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APPENDICES
T2 should be selected as a typical
sample temperature and should be
approximately 10°C different from T1.
The temperature coefficients of the
following electrolytes generally fall into
the ranges show below:
Acids: 1.0 - 1.6%/°C
Bases: 1.8 - 2.2%/°C
Salts: 2.2 - 3.0%/°C
Drinking water: 2.0%/°C
Ultra-pure water: 5.2%/°C
Average temperature coefficients of
standard electrolyte solutions are
expressed as %/°C of the conductivity
value at 25°C.
T2 should be selected as a typical sample
temperature and should be approximately
10°C different from T1. The temperature
coefficients of the following electrolytes
generally fall into the following ranges: