Delphin ProfiMessage - Page 208

ProfiMessage
Thermocouplescanbedirectlyconnected.Usetheconfigurationdialoguetoset
thetype(J,K,T,R,etc.).
Hint

Coldjunctioncompensationrequiredforthethermocoupleisinteg-
ratedintothedevice.EnterthecompensationchannelastheRefer-
ence Junction intheAdvanced settingstab(forthesameI/O
module).
Measuring temperatures / resistances at analogue input
Connectresistorortemperatureprobeswith4-wiretechnologywhenpossible.
Thisconnectionmethodprovidesthebestresultssincecurrentpathandmeas-
uringcircuitareseparate.Measurementcurrentin2-or3-wireconnectorsflows
throughboth,orone,measurementlines.Voltagedropsonthemeasuringlinecan
thereforedistortreadings.
Severalconstant-powersourcesareavailablewithinthedevicetosupplypower.
Thesesourcesdeliver1mA.
Theycanmeasureresistancevaluesofupto
10κW.
Sensor at a digital input
Digitalinputshavetwovariants:
l Inputforlevel(detection)
l Inputsforfrequencymeasurementorcounting
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Delphin Technology AG
Dezember 2015
ProfiMessage Manual