74
E.
R
ESISTIVITY
T
EMPERATURE
C
OMPENSATION
The temperature coefficient of pure water changes with concentration and temperature. The graph below
shows the % change per °C for 18.2 MΩ water. For the range of 20°- 40°C the mean value is -5% per °C, this is
the default value set in the Model T80. The temperature coefficient of 10 MΩ water drops to a mean value of
-2.6%. The standard Resistivity temperature coefficient of -2.0%/°C is valid for all values below 1.0 MΩ water.
The Temperature Coefficient is set in CONFIG→SENSOR→T COMP→-5.000%
F.
SOFTWARE
HISTORY
Date
Version
Changes
July 2012
Rev. A
Initial Release
Feb. 2013
Rev. B
Conductivity Resistivity specifications added
June 2013
Rev. C
TRITON® DO80 and TR6 added
July 2013
Rev. D
Conductivity Calibrations added
July 2013
Rev. E
MODBUS Register update
May 2014
Rev. F
2 Channel addition, MODBUS Register update
July 2014
Rev. G
Resistivity Calibrations added
August 2014
Rev. H
S80 Table corrected
August 2014
Rev. I
Icons deleted
