Maintenance and Troubleshooting Manual
Section 2: Troubleshooting
3-9000-764 Rev F
December 2017
Meter maintenance
21
Meter Monitor (Detailed) view
•
Flow Profile
•
Flow profile ratios can be viewed by
clicking on the arrows in the upper
left of the chart.
•
The flow profile ratios for chords A
and D and chords B and C should be
equal lengths.
•
The flow velocity ratio between
chords A & D or chords B & C should
not differ by more than 10%, changes
will be reflected by the symmetry and
flow profile values.
•
If the difference persists, the flow
conditioner (if installed) should be
checked for blockages and if required
the upstream piping should be
cleaned.
•
Per path Speed of Sound (SOS) differ-
ences should not be more than .35%,
these can be viewed by clicking on the
arrows in the upper left of the chart.
Negative values are shown in blue.
•
The SOS difference can be caused by
buildup on the transducer, incorrect
geometrical and delay time values
and stratification at lower velocities.
•
Gains and Signal to Noise Ratios (SNR)
are displayed in decibels and should
be compared to the initial values in
the maintenance logs taken during
the calibration or initial start-up.
•
The average chord signal amplitudes
should be compared to the initial
values in the maintenance logs.
•
The Check Status chord LED will turn
from green to red if a path is hard
failed. The issue or issues causing the
failure must be corrected before the
alarm can be cleared.
Table 2-2 Maintenance
Daniel MeterLink utility
Diagnostics
Action(s)
