User Manual

<Appendix 2 For SC (Conductivity)>
App.2-3
IM 12A01A02-01E 5th Edition : Oct. 31, 2013-00
<Calculationexample>
 Calculatethetemperaturecoefcientofaliquidfromthefollowingdata.
 Conductivity124.5µS/cmataliquidtemperatureof18.0°Candaconductivity147.6µS/cm
ataliquidtemperatureof31.0°C.
Substituting the data in the above formula gives the following result.
147.6 - 124.5
x 100= 1.298 %/°C
α =
124.5x(31.0 - 25) - 147.6x(18.0 - 25)
 SetthetemperaturecoefcientintheFLXA21converter.
Whenthetemperaturecoefcient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coefcientalreadysetisaccurate.
If,whentheliquidtemperatureislowered,alargerconductivityvalueisindicated,the
temperaturecoefcientalreadysetistoosmall.
Theoppositealsoapplies.Ifasmallerconductivityvalueisindicated,thetemperaturecoefcient
alreadysetistoolarge.Ineithercase,changethetemperaturecoefcientsothattheconductivity
no longer changes.
l Matrix
Matrixmeanstemperaturecompensationwiththetemperaturecompensationmatrix.
Thetemperaturecompensationmatrixisatableofconductivityvaluesatdifferenttemperatures
and concentrations.
Ready-madematrixesanduser-denedmatrixesareavailable.
<Ready-made matrixes>
Ready-madetemperaturecompensationmatrixesareavailableforcommoninorganicacidsand
bases. Those for ammonia and morpholine are also available.
Table 2 Ready-made temperature compensation matrixes
Matrix
Compound to
be measured
Concentration
Temp. compensation
range
Details
Ammonia 0..50ppb Ammonia 0 to 50 ppb 0to90˚C Table A
Ammonia 15..30% Ammonia 15 to 30% 10to50˚C TableB
Morpholine 0..500ppb Morpholine 0 to 500 ppb 0to90˚C Table C
Sulfunic acid 0..27% H
2
SO
4
0 to 27% 0to100˚C TableD
Sulfunic acid 39..85% H
2
SO
4
39 to 85% -18to116˚C Table E
Sulfunic acid 93..100% H
2
SO
4
93 to 100% 10to90˚C Table F
NaOH0..15% NaOH 0 to 15% 0to100˚C Table G
NaOH25..50% NaOH 25 to 50% 0to80˚C Table H
HCl 0..200ppb HCl 0 to 200 ppb 0to100˚C Table I
HCl 0..18% HCI 0 to 18% -10to65˚C Table J
HCl 24..44% HCI 24 to 44% -20to65˚C Table K
HNO
3
0..25% HNO
3
0 to 25% 0to80˚C Table L
HNO
3
35..80% HNO
3
35 to 80% -16to60˚C Table M
Theready-madetemperaturecompensationmatrixesarelistedinTableAtoMwhere
temperatures are in the column and concentrations are in the rows.
App.
SC