Emerson Rosemount 3410 Series Maintenance And Troubleshooting Manual page 15

Maintenance and Troubleshooting manual
00809-0200-3104
2.1.3 Chord A, Chord B, Chord C and Chord D alarms
These alarms indicate how a chord is functioning.
Table 2-1: LED colors
LED color
Green
Yellow
Red
Gray
2.1.4 Field I/O (input/output) alarm
Reports various field I/O devices that are in alarm.
Click Check Status for more details on specific alarms. The field is grayed out if the
Rosemount 3410 Series Ultrasonic Gas Flow Meter does not support this alarm.
2.1.5 Validity alarm
This alarm indicates that the meter may not be measuring accurately. Click Check Status to
see a description of which validity alarms are active. The validity alarms QMeter and QFlow
indicate an issue with the meter collecting enough information from the chords to make an
accurate measurement. The validity alarms for pressure and temperature indicate that the
value is above or below the alarm limits for these values. Red and green are the only colors
used for this alarm.
2.1.6 Comms alarm
The Comms alarm indicates that communications between MeterLink
failed. This could be due to a poor communication link. MeterLink continues to retry
communications. Red and green are the only colors used for this alarm.
2.1.7 Communications
The Communications Analyzer (via MeterLink
menu path) displays communications between MeterLink and the ultrasonic meter.
This utility is useful for troubleshooting communications to the meter. It displays many of
the transmission control protocol/Internet protocol (TCP/IP) commands between MeterLink
and the connected meter.
Rosemount 3415, 3416 and 3417
Problem
No alarms are present. Chord is operating properly.
The chord has failed or is in acquisition. This chord is not used for this batch. Chords
that have failed or are shown to be in acquisition for repeated batches indicates that
the meter must be inspected by a service technician.
The chord has manually been set to inactive. At least one sample in the batch caused
an alarm but it did not cause the chord to fail. The sample will not be used in the
batch. Discarding occasional samples can occur during normal operation such as
during flow velocity changes.
The in-use length is not equal to the calculated length for chord. If this is a new meter
or an upgraded meter, check that the chord length and correct if needed. If incorrect,
check all meter parameters against the meter Zero Flow Calibration report. This
report can be requested from your local area Emerson Flow service representative.
The chord has manually been set to inactive.
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Tools → Menu → Communications Analyzer
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Troubleshooting
December 2023
and the meter
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