ABB ProcessMaster FEM630 Operating Instructions Manual

Also see for ProcessMaster FEM630: Instruction manual

Contents

ABB ProcessMaster FEM630 Operating Instructions Manual Manual pdf 119 page image

119FEM630 | ELECTROMAGNETIC FLOWMETER | OI/FEM630-EN REV. A9 Diagnosis / error messagesExtended diagnostic functionsMonitoring the electrode impedanceThe measurement monitors the impedance between themeasuring electrode and grounding and activates an alarmif the impedance drops below a limit. The function isactivated together with the conductivity measurement.Requirements for use:• Conductivity of the measuring medium: 20 to 20000 μS/cm.Additional installation conditions:• When using plastic piping, install a grounding plate at thefront and back of the device.• There must not be any deposits on the measuring elec-trodes.• The measuring tube must always be completely full, andthe measuring medium must have only minor deviations inconductivity.Measurements on the flowmeterCoil inductance, coil current, coil resistanceThe diagnosis of the coil in the sensor includes coilinductance, current and resistance.Flowmeter sensor temperatureThe coil temperature monitoring triggers an alarm via thedigital output, if configured.The minimum and maximum alarm value for the coiltemperature can be set.The coil temperature is a function of the ambienttemperature and measuring medium temperature.Compliance with the temperature specification of thesensor liner can thus be monitored.SetupTransmitter monitoringMonitoring the temperature of the electronic unit in thetransmitter triggers an alarm via the digital output, ifconfigured.In the ‘...Diagnosis Values’, the current temperature as wellas the smallest and largest previously measuredtemperature is displayed.Menu / parameterDiagnostics / ...Diagnosis Control / ...Diagnosis CoilCoil Diag On/Off Activate the function.Coil Resistor Display the coil resistance.Coil Current Display the coil current.Coil Inductance Display the coil inductance.Coil Temperature Display the coil temperature within thesensor.Coil Temperature AdjMeasurement of coil temperature must beset in accordance with the conditions on-site. Temperature measured with a separatethermometer can be entered here.Coil Temp. Min Alarm Min. and max. alarm for the sensortemperature (coil temperature). Can be usedto monitor the temperature limit of themeter tube linerCoil Temp. Max Alarm