Emerson Process Management 3422 User Manual
280
Chord A to Chord D
Section 7: Maintenance and troubleshooting
Reference, Installation, and Operations Manual
June 2013
3-9000-743 Rev S
7.5.3
Chord A to Chord D
Chord(s) A through D - These alarms indicate how a chord is functioning Red and green are the
only colors used for this alarm.
only colors used for this alarm.
7.5.4
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 Daniel 3400 Series Gas Ultrasonic Flow Meter
does not support this alarm.
does not support this alarm.
7.5.5
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.
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.
7.5.6
Comms Alarm
The Comms alarm indicates that communications between Daniel MeterLink and the meter
failed. This could be due to a poor communication link. Daniel MeterLink continues to retry
communications. Red and green are the only colors used for this alarm.
failed. This could be due to a poor communication link. Daniel MeterLink continues to retry
communications. Red and green are the only colors used for this alarm.
7.5.7
Check Status
Click
Check Status
if any of the LEDs are yellow or red to see more specific information causing
the status alarm. Some alarms do not require an acknowledge and will clear automatically when
the alarm condition goes away. Alarms that require a user to acknowledge them will have a
button to the right titled
the alarm condition goes away. Alarms that require a user to acknowledge them will have a
button to the right titled
ACK
. Clicking the
ACK
button changes the button text to
Wait
and
sends a request to the meter to clear the alarm. The alarm will disappear from the Check Status
dialog once the alarm actually clears.
dialog once the alarm actually clears.
Table 7-3 Chord alarms
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.
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 acquisi-
tion for repeated batches indicates that the meter should be
inspected by a service technician.
this batch. Chords that have failed or are shown to be in acquisi-
tion for repeated batches indicates that the meter should be
inspected by a service technician.
Gray
The chord has manually been set to inactive.