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FEM630 | ELECTROMAGNETIC FLOWMETER | OI/FEM630-EN REV. A
9 ...Diagnosis / error messages
...Extended diagnostic functions
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 Sensor grounding on
page 28).
• There may not be any deposits on the measuring
electrodes.
Verification
Fingerprint database
The sensor and transmitter fingerprint stored in the
SensorMemory allows you to compare the state of the
device at the time of manufacture at the factory with the
current state of the device at the customer site.
The check is started manually and returns a ‘successful /
failed’ result.
If the verification is unsuccessful, troubleshooting
information is shown on the display (parameter ‘Rslt FP
Verification‘).
A software tool (ABB Ability SRV500) is available for
documentation and trend analysis.
Setup
Menu / parameter
Diagnostics / ...Diagnosis Control / ...Fingerprints
Display of transmitter fingerprint (factory
fingerprint)
Se Factory Coil Ind. Display coil impedance fingerprint
Strt FP Verification Start of test
Rslt FP Verification Test result
Display of transmitter fingerprint (customer
fingerprint)
Se Customer Coil Ind Display coil impedance fingerprint
Menu / parameter
Diagnostics / ...Diagnosis Control / ...Noise Check
Start Noise Check Start of test
Result Noise Check Test result
Power Spectrum Current power spectrum.
Display of the four strongest amplitudes of
associated frequency.
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