• System
• Power Loss
• Field I/O
• Validity
• Comms
• Check Status
2.1.2 System alarm
The System alarm indicates a failure in the hardware that should be addressed by a service
technician. This includes memory checksum errors and communication errors within the
hardware. A Red LED indicates a System alarm condition. Collect a Maintenance log and an
audit/alarm log and then, contact your Daniel service representative. This could be an
alarm condition that occurred and remains latched until the condition is resolved and the
alarm is cleared by clicking the ACK button on the Monitor | Check Status| Status Summary page.
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 colorsTable 2-1:
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 didnotcausethechordto-
fail.Thesamplewillnotbeusedinthebatch.Discardingoccasional 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.
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 Daniel 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
Troubleshooting
Maintenance and Troubleshooting manual 11
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