IM 12D08N05-01E
APP-3
<APPENDIXES>
• Checking
When the temperature coefficient already set is accurate, the conductivity to be displayed
must be constant regardless of liquid temperature. The following check will make sure that
the temperature coefficient already set is accurate.
If, when the liquid temperature is lowered, a larger conductivity value is indicated, the
temperature coefficient already set is too small.
The opposite also applies. If a smaller conductivity value is indicated, the temperature
coefficient already set is too large. In either case, change the temperature coefficient so
that the conductivity no longer changes.
n
Matrix compensation
The compensation matrix is a table of temperature and conductivity values at differing
concentrations. These values are used to calculate the temperature compensation
applicable for a particular solution. Choose the component that you will be measuring in
your application, and where appropriate the concentration range. SC450G will do the rest.
By following the routing:
Commissioning>> Measurement setup>> Temp.compensation>> Matrix
you gain access to the Matrix selection area.
Matrices are available for the common mineral acids and bases. In addition Ammonia and
Morpholine are included.
In short by using the matrix method, specialist compensation is available for the majority
of applications in the power industry, water treatment, and chemical manufacturing.
The following matrices are available initially, but as with all Yokogawa products, we are
continually striving to improve both the quality and technological content. Further solutions
will be added to this list.
Select matrix
Concentration
Temperature
Ammonia 0..50 ppb
0 to 50 ppb
0 to 90 ºC
Morpholine 0..500 ppb
0 to 500 ppb
0 to 90 ºC
Ammonia 15..30%
15 to 30 %
10 to 50 ºC
Sulfuric acid 0..27%
0 to 27 %
-1.1 to 98.9 ºC
Sulfuric acid 39..85%
39 to 85 %
-17.8 to 115.6 ºC
Sulfuric acid 93..100%
93 to 100 %
10 to 90 ºC
NaOH 0..15%
0 to 15 %
0 to 100 ºC
NaOH 25..50%
25 to 50 %
0 to 80 ºC
HCl 0..200 ppb
0 to 200 ppb
0 to 100 ºC
HCl 0..18%
0 to 18.2 %
-10 to 65 ºC
HCl 24..44%
23.7 to 43.8 %
-20 to 65 ºC
HNO
3
0..25%
0 to 24.80 %
0 to 80 ºC
HNO
3
35..88%
35.0 to 87.7 %
-16 to 60 ºC
