Following is a list and a brief description of the types of alarms:
• 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 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 re-
peated 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.
Troubleshooting
Maintenance and Troubleshooting manual 13
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