Perform A Core Processor Resistance Test - Emerson Micro Motion 2700 Configuration And Use Manual

Table 12-14: Enhanced core processor LED states
LED state
Solid red
Flashing red (80% on, 20% off)
Flashing red (50% on, 50% off)
Flashing red (50% on, 50% off,
skips every 4th)
OFF
12.30

Perform a core processor resistance test

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Configuration and Use Manual
Description
High-severity alarm
Tubes not full
Electronics failed
Sensor failed
Core processor receiving less
than 5 volts
Core processor internal failure
Power down the transmitter.
If you have a 4-wire remote installation or a remote core processor with remote
transmitter installation, remove the core processor lid.
If you have an integral installation:
a. Loosen the four cap screws that fasten the transmitter to the base.
(continued)
Recommended action
Check alarm status.
• If alarm A105 (slug flow) is active, refer to the
recommended actions for that alarm.
• If alarm A033 (tubes not full) is active, verify
process. Check for air in the flow tubes, tubes
not filled, foreign material in tubes, or coating
in tubes.
The meter requires factory service.
The meter requires factory service.
• 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.
The meter requires factory service.
Troubleshooting
247