Electro-Chemical Devices (ECD) T80 - Manual (Page 75)

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
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