Emerson Micro Motion LNG Series, Configuration And Use Manual

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10.2 Status alerts, causes, and recommendations
Alert num-
ber
Alert title Possible cause Recommended actions
A001 EEPROM Error The transmitter has detected a
problem communicating with the
sensor. • Cycle power to the meter.
• Replace the core processor.
• Contact Micro Motion.
A002 RAM Error The transmitter has detected a
problem communicating with the
sensor. • Cycle power to the meter.
• Replace the core processor.
• Contact Micro Motion.
A003 No Sensor Response The transmitter is not receiving one
or more basic electrical signals from
the sensor.
• Check the drive gain and the pickoff
voltage.
• Check the wiring between the sensor
and the transmitter.
• Verify that internal wiring is secure and
that there are no internal electrical
problems.
• Check the integrity of the sensor tubes.
A004 Temperature Over-
range The RTD resistance is out of range
for the sensor. • Check your process conditions against
the values reported by the device.
• Verify temperature characterization or
calibration parameters.
• Verify that internal wiring is secure and
that there are no internal electrical
problems.
• Check the wiring between the sensor
and the transmitter.
• Contact Micro Motion.
A005 Mass Flow Rate
Overrange The measured flow rate is greater
than the maximum flow rate of the
sensor (
Δ
T greater than 200 µs).
• If other alerts are present, resolve those
alert conditions first. If the current alert
persists, continue with the recommen-
ded actions.
• Check your process conditions against
the values reported by the device.
• Check for two-phase flow.
A006 Characterization Re-
quired Calibration factors have not been
entered, or the sensor type is incor-
rect, or the calibration factors are
incorrect for the sensor type. • Verify all of the characterization or cali-
bration parameters. See the sensor tag
or the calibration sheet for your meter.
• Verify the setting of the Sensor Type pa-
rameter.
• If Sensor Type = Curved Tube , ensure that
no parameters specific to Straight Tube
have been set.
• Verify that internal wiring is secure and
that there are no internal electrical
problems.
• Replace the core processor.
• Contact Micro Motion.
Troubleshooting
70 Micro Motion ® LNG Series Meters