ABB ProcessMaster FEP630 - Flowmeter Measurements and Grounding Monitoring

66 FEP630, FEH630 ELECTROMAGNETIC FLOWMETER | CI/FEP630/FEH630-EN REV. D
… 7 Operation
… Extended diagnostic functions
Measurements on the flowmeter
Coil inductance, coil current, coil resistance
The diagnosis of the coil in the sensor includes coil inductance,
current and resistance.
Flowmeter sensor temperature
The coil temperature monitoring triggers an alarm via the digital
output, if configured.
The minimum and maximum alarm value for the coil temperature
can be set.
The coil temperature is a function of the ambient temperature
and measuring medium temperature.
Compliance with the temperature specification of the sensor
liner can thus be monitored.
Setup
Menu / parameter Description
Diagnostics / ...Diagnosis Control / ...Diagnosis Coil
Coil 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 the sensor.
Coil Temperature Adj Measurement of coil temperature must be set in
accordance with the conditions on-site.
Temperature measured with a separate
thermometer can be entered here.
Coil Temp. Min Alarm Min. and max. alarm for the sensor temperature
(coil temperature). Can be used to monitor the
temperature limit of the meter tube liner
Coil Temp. Max Alarm
Transmitter monitoring
Monitoring the temperature of the electronic unit in the
transmitter triggers an alarm via the digital output, if
configured.
In the ‘...Diagnosis Values’, the current temperature as well as the
smallest and largest previously measured temperature is
displayed.
Monitoring the grounding
The function checks for noise in the measuring signal and the
electrical grounding of the device. While the check is in progress,
no flow measurement can take place.
The noise / grounding check is started manually and delivers a
‘successful / failed’ result.
The measurements (Power Spectrum, Amplitude 1 to 4 and
Frequency 1 to 4) will help if the noise / grounding check fails.
Requirements for use:
• The sensor must be filled completely with measuring
medium.
• There is no flow through the sensor (close all valves, shut-
off devices etc.)
• The sensor must be grounded (see ).
• There may not be any deposits on the measuring
electrodes.
Menu / parameter Description
Diagnostics / ...Diagnosis Control / ...Noise Check
Start Noise Check Start of test
Result Noise Check Test result
Power Spectrum Current power spectrum.
Amplitude 1 Value ... 4 Display of the four strongest amplitudes of the
frequency spectrum in ιV with the associated
frequency.
Frequency 1 ... 4