Emerson Rosemount 3410 Series Maintenance And Troubleshooting Manual page 31

Maintenance and Troubleshooting manual
00809-0200-3104
2.2.20 One or more chords is not indicating a reading (reporting
zeros)
Recommended actions
2.2.21 Power failure
Meter has had power removed for a period of time, or the meter has restarted itself, such
as after a firmware upgrade. The Audit log in the meter indicates the power fail time.
Recommended actions
2.2.22 Program download failed during firmware upgrade
If meter experiences a power loss in the middle of a firmware upgrade, the meter may
become unresponsive, and communications to the meter may not be possible.
Recommended action
If this occurs, contact Emerson Flow Support for assistance.
2.2.23 Sound velocity is outside defined limits
The meter's average sound velocity is outside the defined limits.
Recommended actions
Rosemount 3415, 3416 and 3417
1. Check for loose connections at the cable connectors.
2. Check the resistance of the transducers. The ideal resistance for a transducer is
approximately 2 Ω.
3. Problem may also be caused by a bad acquisition module or interconnect cable.
4. Check system status in MeterLink
5. Check the central processing unit (CPU) module.
6. If Chord A is not indicating, change the transducer cables from Chord B to
Chord A.
If Chord B then fails, the transducers are bad on Chord A.
1. If this was an unexpected restart of the meter, verify the integrity of the power
to the meter and make sure that the voltage level is in the range of 11-36 Vdc at
the meter.
2. If this was a known power fail or restart of the meter, just acknowledge this
alarm.
1. Verify that all chords are measuring the same speed of sound within about
0.15%. Look for alarms that indicate transducer problems and resolve any of
these issues.
This could include failing transducers, debris buildup on transducers, or
incorrectly entered path lengths in the configuration.
2. If the chords agree, adjust the SSMin or SSMax using the Edit/Compare Config
utility in MeterLink , so the meter's average speed of sound falls within these
™
limits.
3. Collect a Maintenance log using MeterLink and contact your Emerson Flow
service representative.
for any flagged errors.
™
Troubleshooting
December 2023
31