Emerson MMI-20019043 Manuel D’Utilisation

3. Tighten the screws, torquing to 6 to 8 in-lbs (0.7 to 0.9 N-m).
4. Replace the end-cap.

When reassembling the meter components, be sure to grease all O-rings.

12.29.1

Core processor LED states

1 flash per second (ON 25%, OFF
75%)

Normal operation

No action required.

1 flash per second (ON 75%, OFF
25%)

Slug flow (two-phase flow)

.

Solid ON

Zero or calibration in progress

No action required.

Core processor receiving be-
tween 11.5 and 5 volts

Check power supply to transmitter.

3 rapid flashes, followed by
pause

Sensor not recognized

Check wiring between transmitter and sensor.

Improper configuration

Check sensor characterization parameters.

Broken pin between sensor and
core processor

The meter requires factory service.

4 flashes per second

Fault condition

Check alarm status.

OFF

Core processor receiving less
than 5 volts

•

Verify power supply wiring to core processor.

•

If transmitter status LED is lit, transmitter is re-
ceiving power. Check voltage across terminals
1 (VDC+) and 2 (VDC–) in core processor. If
reading is less than 1 VDC, verify power supply
wiring to core processor. Wires may be switch-
ed.

•

If transmitter status LED is not lit, transmitter
is not receiving power. Check power supply. If
power supply is operational, internal transmit-
ter, display, or LED failure is possible – the me-
ter may require factory service.

Core processor internal failure

The meter requires factory service.

Solid green

Normal operation

No action required.

Flashing yellow

Zero in progress

No action required.

Solid yellow

Low-severity alarm

Check alarm status.

Troubleshooting

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