Table 2-2: Maintenance
(continued)
MeterLink utility
Diagnostics
Action(s)
Meter Monitor (Detailed) view Flow Profile
•
Flow profile velocity for Chords A and B
shown on the Bar graph should be of equal
lengths and at 3 ft/s should be 1.0 (range of
0.95 to 1.05 indicates a good flow profile
velocity).
•
If the velocity ratio is greater than a 10%
differential between chords, a degradation
in the symmetry is indicated.
•
Check for a chord failure and resolve this
and clear the alarm.
•
If installed, check the flow conditioner for
blockage.
•
Compare gains and Signal to Noise (SNR)
ratios decibel values with the meter
calibration values in the Maintenance log
Inspection report.
•
The meter may not be in measurement
mode or there are too few operating
chords.
•
Check chord average signal amplitudes with
the meter baseline values in the
Maintenance log Inspection report.
Meter Monitor (Summary)
view Meter Flow Properties
Table
Flow velocity
•
Check the flow direction. If reverse flow is
detected, check for valve leaks.
•
If the meter run typically has reverse flow
when flow is stopped, use the
Field Setup
Wizard
→
General Page
and reconfigure
the
ReverseFlowVolLmt
to allow a higher
volume.
Meter Monitor (Detailed) view
Monitor Chart Selection list
Speed of Sound
•
Compare Speed of Sound deviation from
measured SOS relative to the average SOS.
•
Check the chord’s SOS.
•
Check and correct geometry configuration
(pipe diameter, distance between the
transducers (LA), and delay time).
•
If present, resolve transducer issues (failed
transducer, cabling or debris buildup on the
transducer face, or path length configured
incorrectly).
•
Adjust
SSMin
or
SSMax
(consult a Emerson
Flow service representative before making
these adjustments).
Troubleshooting
Maintenance and Troubleshooting Manual
April 2022
00809-0100-3812
26
Emerson.com/Rosemount
