Emerson Daniel 3410 Series, Operation Manual

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134 Read the baseline viewer gauge values
Section 7: Tools commands 3410 Series Gas Ultrasonic Meters Operations Manual
June 2016 3-9000-777 Rev D
7.6.1 Read the baseline viewer gauge values
Figure 7-2 describes the values for each gauge and how the green zones are defined.
Table 7-2 Baseline viewer gauge values
Value Description
Avg Velocity Displays the average flow velocity for the meter. This gauge contains no green zone.
Profile Factor Displays the velocity flow profile factor for the meter. The profile factor is calculated from the
chordal velocities as ((VeVelocityC)/(VeVelocityD)). The green zone is centered
on the profile factor set in the baseline
±
the percentage defined by Profile factor limit configu-
rable in the Field Setup Wizard on the Continuous Flow Analysis page.
Swirl Angle Displays the swirl angle in degrees for the meter. The green zone is centered on the swirl angle
set in the baseline
±
5%.
Symmetry Displays the symmetry for the meter. The symmetry is calculated from the chordal velocities as
((VeVelocityB)/(VeVelocityD)). The green zone is centered on the Symmetry set
in the baseline
±
the percentage defined by Symmetry limit configurable in the
Field Setup Wizard on the Continuous Flow Analysis page.
Cross-Flow Displays the cross-flow for the meter. The cross-flow is calculated from the chordal velocities as
((VeVelocityC)/(VeVelocityD)). The green zone is centered on the cross-flow set
in the baseline
±
the percentage defined by Cross-flow limit configurable in the
Field Setup Wizard on the Continuous Flow Analysis page.
Turbulence A through D Displays the percent turbulence values for each path of the meter. The green zone extends for 0%
to the Chord turbulence limit configurable in the
Field Setup Wizard on the Continuous Flow
Analysis page.
Display
1-minute averages Selecting 1-minute averages will make the gauges display a one minute rolling average. Next to
this selection will be an indication if the one minute average values are valid or invalid. For the
averages to be valid, the meter must meet the following criteria for at least one full minute:
flowing in only one direction, no chord failures or inactive chords present and flowing within the
Flow limits configurable in the
Field Setup Wizard on the Continuous Flow Analysis page.
Current values Displays the most recently calculated values.