
104
Using ProLink
®
Software with Micro Motion
®
Transmitters
Configure Menu: Transmitter Variables
continued
Flow direction
9.6 Flow direction
Open the Direction list box under Flow to configure milliamp outputs, the
frequency/pulse output, and internal totalizers for flow direction. The
option that is chosen (forward, reverse, or bi-directional), determines
how the outputs and totalizers will react when fluid flows through the
sensor.
• The flow direction arrow on the sensor is considered the "forward"
flow direction (when the sensor is installed and properly wired).
However, the flowmeter will measure fluid flow accurately in either
direction.
•
Table 9-9
lists how outputs and totalizers are affected by the option
chosen from the Direction list box. Note that NAMUR-compliant
transmitters are affected differently than transmitters that are not
NAMUR-compliant.
•
Table 9-10
, page 105, lists software versions and dates for
NAMUR-compliant transmitters.
Table 9-9. Effect of flow direction on outputs
Fluid flow
direction
Output or
totalizer
Option chosen from Direction list box
Forward Reverse Bi-directional
Fluid flowing
in
same direction
as flow arrow
on sensor
Milliamp outputs,
transmitters that are not
NAMUR-compliant
Output increases as
flow rate increases
• 4-20 mA output
goes to 2 mA
• 0-20 mA output
goes to 0 mA
• Output increases as
flow rate increases
• 4-20 mA output remains
at or above 4 mA
Milliamp outputs,
NAMUR-compliant
transmitters
Output increases as
flow rate increases
• 4-20 mA output
goes to 3.8 mA
• 0-20 mA output
goes to 0 mA
• Output increases as
flow rate increases
• 4-20 mA output remains
at or above 4 mA
Frequency/pulse output Output increases as
flow rate increases
Output remains at 0
Hz
Output increases as flow
rate increases
Control output
1
Flow direction output
2
Output is 15 VDC Output is 15 VDC Output is 15 VDC
Internal totalizers Flow totals increase Flow totals remain
constant
Flow totals increase
Fluid flowing
in
opposite direction
from flow arrow
on sensor
Milliamp outputs,
transmitters that are not
NAMUR-compliant
• 4-20 mA output goes
to 2 mA
• 0-20 mA output goes
to 0 mA
Output increases as
flow rate increases
• Output increases as
flow rate increases
• 4-20 mA output remains
at or above 4 mA
Milliamp outputs,
NAMUR-compliant
transmitters
• 4-20 mA output goes
to 3.8 mA
• 0-20 mA output goes
to 0 mA
Output increases as
flow rate increases
• Output increases as
flow rate increases
• 4-20 mA output remains
at or above 4 mA
Frequency/pulse output Output remains at 0 Hz Output increases as
flow rate increases
Output increases as flow
rate increases
Control output
1
Flow direction output
2
Output is 0 VDC Output is 0 VDC Output is 0 VDC
Internal totalizers Flow totals remain
constant
Flow totals increase Flow totals decrease
1
RFT9739 control output configured for flow direction
2
RFT9712 and RFT9729 only
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