Checking The Core Processor Led - Emerson Micro Motion 2700 Configuration And Use Manual

Troubleshooting
6.13.2

Checking the core processor LED

Do not shut off power to the transmitter when checking the core processor LED. To check the core
processor LED:
1. Expose the core processor according to the instructions in Section 6.13.1.
2. Check the core processor LED against the conditions listed in Table 6-10 (standard core
processor) or Table 6-11 (enhanced core processor).
Table 6-10 Standard core processor LED behavior, flowmeter conditions, and remedies
LED behavior
1 flash per second
(75% off, 25% on)
1 flash per second
(25% off, 75% on)
Solid on
3 rapid flashes
followed by a pause
4 flashes per second Fault condition
OFF
Table 6-11 Enhanced core processor LED behavior, meter conditions, and remedies
LED behavior
Solid green
Flashing yellow
Solid yellow
108
Condition Possible remedy
Normal operation No action required
Slug flow See Section 6.10.
Zero or calibration in If zero or calibration procedure is in progress, no action is
progress required. If these procedures are not in progress, contact Micro
Motion Customer Service.
Core processor Check power supply to transmitter. See Section 6.9.1.
receiving between
11.5 and 5 volts
Sensor not Check wiring between transmitter and sensor (9-wire remote
recognized installation or remote core processor with remote transmitter
installation). Refer to the installation manual.
Improper Verify characterization. See Section 3.3.
configuration
Broken pin between Contact Micro Motion Customer Service.
sensor and core
processor
Check alarm status.
Core processor Verify power supply wiring to core processor. Refer to the
receiving less than installation manual.
5 volts
If status LED is lit, transmitter is receiving power. Check voltage
across terminals 1 (VDC+) and 2 (VDC–) in core processor.
Normal reading is approximately 14 VDC. If reading is normal,
internal core processor failure is possible — contact Micro Motion
Customer Service. If reading is 0, internal transmitter failure is
possible — contact Micro Motion Customer Service. If reading is
less than 1 VDC, verify power supply wiring to core processor.
Wires may be switched. Refer to the installation manual.
If status LED is not lit, transmitter is not receiving power. Check
power supply. If power supply is operational, internal transmitter,
display, or LED failure is possible. Contact Micro Motion Customer
Service.
Core processor Contact Micro Motion Customer Service.
internal failure
Condition
Normal operation
Zero in progress
Low severity alarm
Possible remedy
No action required.
If calibration is in progress, no action required. If no
calibration is in progress, contact Micro Motion.
Check alarm status.
Model 2700 Transmitter with PROFIBUS-PA