248 43-TV-25-35 GLO Iss.4 Dec 06 UKA5E01001767-04Thermocouple CJC CompensationThermocouple CJC CompensationThe different methods for connecting thermocouples according to the type of reference areshown below.Internal AutomaticInternal Auto. This is connected to the input terminals of the recorder, and the temperatureat this junction is being measured by a temperature sensor on the rear panel of the recorder.The reading from this sensor is read off against a value taken from the thermocouple table,which corresponds to the type of thermocouple being used. The corresponding reading involts for the temperature measured by the sensor is then used as a reference for the readingfrom the thermocouple.Diagram shows passive burnout, for active burnout replace the + for *.Temperaturereading tomathsexpressionReadingin °C(Volts)CDVCJC Readingin volts-+ThermocouplecableMeasuringjunctionInput terminalson rear panel ofrecorderAInputsadded(C+D)Look-up table(convertsvoltage read-ing to tem-perature)ThermocoupleTable
