Sper Scientific 860031 pH - mV Bench-Top Meter - Manual (Page 63)

63
APPENDICES
Linear Temperature Correction
In moderately and highly conductive solutions, temperature
correction can be based on a linear equation involving a
temperature coefficient (θ). The coefficient is usually
expressed as a conductivity variation in %/°C. Linear
temperature correction is used for saline, acids, and
leaching solutions.
Where:
K
Tref
= Conductivity at Tref
K
T
= Conductivity at T (while Tc in P5.2 is set as 0.0, the
measured conductivity is K
T
)
T
ref
= Reference temperature
T = Sample temperature
θ = Temperature coefficient
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: