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 alarm
Chord A, Chord B, Chord C and Chord D - 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 alarm
Reports various field I/O devices that are in alarm. Click the Check Status button for more
details on specific alarms. The field is grayed out if the Rosemount
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
Analyzer 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 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. Chord
that have failed or are shown to be in acquisition for repeated batches indicates that
the meter should 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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3410 Series Ultrasonic
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Tools → Menu → Communications
Troubleshooting
April 2022
and the meter
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