2.1.3
Chord A and Chord B alarm
Chord A and Chord B - 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 meter. It displays
many of the TCP/IP commands between MeterLink and the connected meter. For
troubleshooting communications with the 475 Field Communicator for the HART
®
Protocol, refer to Section 5 of the Emerson 475 Field Communicator User’s Manual, Rev D.
Maintenance and Troubleshooting Manual
Troubleshooting
00809-0100-3812
April 2022
Rosemount 3812 Liquid Ultrasonic Flow Meter
15
Содержание Rosemount 3812
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