Emerson Micro Motion LNG Series, Configuration And Use Manual

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Overview
Flow Direction
controls how forward flow and reverse flow affect flow measurement and
reporting. You can configure two flow directions - one flow direction to map to the first
group of totals, and a second flow direction to map to the second group of totals. The
default flow directions are:
Forward for the first group of totals, and Reverse for the second
group of totals.
Flow Direction
is defined with respect to the flow arrow on the sensor:
• Forward flow (positive flow) moves in the direction of the flow arrow on the sensor.
• Reverse flow (negative flow) moves in the direction opposite to the flow arrow on
the sensor.
Tip
Micro Motion sensors are bidirectional. Measurement accuracy is not affected by actual flow
direction or the setting of the
Flow Direction parameter.
Procedure
Set
Flow Direction
to the value you want to use.
You can configure two flow directions:
• The first flow direction is configured and applied to the first totals. The default setting is
Forward .
• The second flow direction is configured and applied to the second totals. The default
setting is
Reverse
.
4.4.1 Options for
Flow Direction
Options for
Flow Direction
Table 4-4:
Flow direction setting from
ProLink III Relationship to Flow Direction arrow on sensor
Forward Appropriate when the Flow Direction arrow is in the same
direction as the majority of flow.
Reverse
Appropriate when the Flow Direction arrow is in the same
direction as the majority of flow.
Absolute Value Flow Direction arrow is not relevant.
Bidirectional
Appropriate when both forward and reverse flow are ex-
pected, and forward flow will dominate, but the amount
of reverse flow will be significant.
Negate Forward
Appropriate when the Flow Direction arrow is in the oppo-
site direction from the majority of flow.
Configure process measurement
Configuration and Use Manual 29