Emerson 9739 Manuel D’Utilisation

4.4.1

Options for Flow Direction

Options for Flow Direction

Table 4-4:

Flow Direction

setting

Relationship to Flow Direction ar-
row on sensor

ProLink II

ProLink III

Field Communicator

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

Bi directional

Appropriate when both forward and
reverse flow are expected, and for-
ward flow will dominate, but the
amount of reverse flow will be signifi-
cant.

Negate Forward

Negate/Forward Only

Appropriate when the Flow Direction
arrow is in the opposite direction from
the majority of flow.

Negate Bidirectional

Negate/Bi-directional

Appropriate when both forward and
reverse flow are expected, and reverse
flow will dominate, but the amount of
forward flow will be significant.

Effect of Flow Direction on mA outputs

Flow Direction

affects how the transmitter reports flow values via the mA outputs. The mA

outputs are affected by Flow Direction only if mA Output Process Variable is set to a flow
variable.

Flow Direction and mA outputs

The effect of Flow Direction on the mA outputs depend on Lower Range Value configured for
the mA output:

•

If Lower Range Value is set to 0, see

•

Configure process measurement

Micro Motion

9739 MVD Transmitters