Section 7: Maintenance and troubleshooting

Reference, Installation, and Operations Manual

June 2013

3-9000-743 Rev S

 

 

7.5.3Chord 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.

Table 7-3 Chord alarms
LED ColorProblem

 

 

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 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.

 

 

7.5.4Field 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.

7.5.5Validity 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.

7.5.6Comms 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.

7.5.7Check 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 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.

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Chord A to Chord D