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<7. COMMISSIONING OF SC (Conductivity)>

7-4

IM 12A01A02-01E 8th Edition : Oct. 01, 2015-00

7.1.4 Temperature compensation

l Temperature compensation

Two methods can be used: Automatic and Manual. Select Automatic when a temperature

element is used or Manual when a manually set temperature is used.

NOTE

When Manual is selected on the Temperature compensation, a process temperature should be

set in the “Manual temp.” A temperature shown on the Main display or the Home display is this

manually set temperature.

l Reference temperature

Set a reference temperature to which the measured value must be compensated. Normally 25°C

is used, so this temperature is chosen as the default value.

l Process temperature compensation

Select a temperature compensation method from among None, TC, NaCl, and Matrix. “None”

does not perform the temperature compensation.

l TC

This method uses the linear compensation function.

For how to calculate a temperature coefcient of the compensation function, see “l

Temperature compensation coefcient (TC)” on page App.2-1.

l NaCl

This method uses the standard temperature compensation function with NaCl solution.

For details, see “l NaCl (standard temperature compensation)” on page App.2-1.

l Matrix

This method uses the temperature compensation matrix, which is a table of the conductivity

values at different temperatures and concentrations for a specic solution. The measured

conductivity is compensated based on this matrix to the conductivity at the reference

temperature.

Prepared matrixes and user-dened matrixes can be used. Two different user-dened

matrixes are available.

For details, see “l Matrix” on page App.2-3.

When the measured temperature or the precompensated conductivity is out of the range, the

temperature compensation error (warning) will be issued. This is not a device error.

For more details, see “■ Temperature compensation error” on App. 2-8.

Any two of these three methods can be set for conductivity measurement as “Temp.comp.1” and

“Temp.comp.2”. The result of either method can be output or displayed (see “7.2 Output setup” or

“7.6 Display setup”).

When “Measurement” is set to “Conduct. + Concentr.” for the Measurement, only one method

can be set.

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