YOKOGAWA EXAxt 450 User Manual

48
IM 12D06D05-01E
APPENDIX 1
Temperature compensation
Theconductivityofasolutionisverydependentontemperature.Typicallyforevery1°Cchangein
temperaturethesolutionconductivitywillchangebyapproximately2%.Theeffectoftemperature
varies from one solution to another and is determined by several factors like solution composi-
tion,concentrationandtemperaturerange.Acoefficient(α)isintroducedtoexpresstheamountof
temperatureinfluencein%changeinconductivity/°C.Inalmostallapplicationsthistemperature
influence must be compensated before the conductivity reading can be interpreted as an accurate
measure of concentration or purity.
NaCl or standard temperature compensation
FromthefactorytheEXAxtissetwiththedefaultofageneraltemperaturecompensationfunc-
tionbasedonaSodiumChloride(tablesalt)solution.Thisissuitableformanyapplicationsandis
compatiblewiththeNaClcompensationfunctionsoftypicallaboratoryorportableinstruments.ISC
temperature compensation.
Table 11-1. NaCl-compensation according to IEC 60746-3 with Tref = 25 °C
Configure calculated temperature coefficient (TC).
Followrouting
Commissioning >> Measurement setup >>
Temp.compensation >> T.C.
Enter the temperature coefficient calculated from the
following formula:
A. Calculation of temperature coefficient factor
( With known conductivity at reference temperature).
K
t
- K
ref
α =
T - T
ref
100
K
ref
X
α =Temperaturecompensationfactorin%/°C
T =Measuredtemperaturein°C
K
t
 =ConductivityatT
T
ref
 =Referencetemperature
K
ref
 =ConductivityatT
ref
APPENDICES

YOKOGAWA EXAxt 450 Specifications

General

Brand	YOKOGAWA
Model	EXAxt 450
Category	Media Converter
Language	English