Emerson Rosemount 3814 - Page 15

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.
LED Color Problem
Green No alarms are present. Chord is operating properly.
Yellow 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.
Red 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 should be inspected by a service technician.
Gray The chord has manually been set to inactive, or option is not
available.
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 does not appear if the 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 and the
meter 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 Tools → Menu → Communications
Analyzer menu path) displays communications between MeterLink and the
ultrasonic meter. This utility is useful for troubleshooting communications to the
Maintenance and Troubleshooting Manual Troubleshooting
00809-0100-3814 January2023
Rosemount 3814 Liquid Ultrasonic Flow Meter 15