Yokogawa ISC450 4-Wire Analyzer for Inductive Conductivity - Manual (Page 28)

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IM 12D06D05-01E
5-1. Configure sensor
Measuring unit /cm /m
Either /cm or /m can be chosen here. The Proc-
ess values will be expressed in S/cm or S/m
respectively.
Cell constant (factory)
Cell constant given by factory calibration.
Usually given on a label on the sensor or the
calibration certificate.
Measure
Process values to be measured can be se-
lected to suit the user’s preference.: Conduc-
tivity only, Concentration only or one of both
Conductivity and Concentration.
5-2. Temperature setting
Temperature Element
Selection of the temperature sensor used for
compensation. The default selection is the
Pt1000 Ohm sensor, which gives excellent pre-
cision with the two wire connections used. The
other options give the flexibility to use a very
wide range of other conductivity sensors.
Temperature Unit
Celcius or Fahrenheit temperature scales can
be selected to suit the user’s preference.
5-3. Temperature compensation
Compensation
Two types of methods can be used here. Au-
tomatic for use of temperature element. Select
one of the Temperature elements used. The
other is a manual set temperature. The manual
temperature that represents the process tem-
perature must be set here.
Reference Temperature
Choose a temperature to which the measured
conductivity value must be compensated.
Normally 25°C (77ºC) is used, therefore this
temperature is chosen as default value.
Method
TC In addition to the temperature coefficient
calibration routine it is possible to adjust the
compensation factor directly. If the compensa-
tion factor of the sample liquid is known from
laboratory experiments or has been previously
determined, it can be introduced here.
Adjust the value between 0.00 to 3.50 % per
°C. In combination with reference temperature
a linear compensation function is obtained,
suitable for all kinds of chemical solutions.
NaCl Temperature compensation according
NaCl curve. See appendix 1 for values.
Matrix The EXAxt is equipped with a ma-
trix type algorithm for accurate temperature
compensation in various applications. Select
the range as close as possible to the actual
temperature/concentration range. The EXAxt
will compensate by interpolation. If user defined
1 or user defined 2 is selected, the temperature
compensation range for the adjustable matrix
must be defined.
See Appendix 2 for matrix interpolation.
Note! Extra information on temperature
compensation is given in appendix 1.
5.MENU STRUCTURE COMMISSIONING