Emerson Micro Motion 1000 Series Configuration And Use Manual page 87

Optional Configuration
Figure 8-2 Effect of flow direction on mA outputs: 4mA value < 0
20
12
4
–x 0
Reverse
(1)
flow
Zero flow
Flow direction parameter:
• Forward
mA output configuration:
• 20 mA value = x
• 4 mA value = –x
• –x < 0
To set the 4 mA and 20 mA values, see
Section .
Example 1
Configuration and Use Manual
20
12
4
x
–x
Forward Reverse
(2) (1)
flow flow
Zero flow
Flow direction parameter:
• Reverse
• Negate Forward
(1) Process fluid flowing in opposite direction from flow direction arrow on sensor.
(2) Process fluid flowing in same direction as flow direction arrow on sensor.
Configuration:
• Flow direction = Forward
• mA output: 4 mA = 0 g/s; 20 mA = 100 g/s
(See the first graph in Figure 8-1.)
As a result:
• Under conditions of reverse flow or zero flow, the mA output level
is 4 mA.
• Under conditions of forward flow, up to a flow rate of 100 g/s, the
mA output level varies between 4 mA and 20 mA in proportion to
(the absolute value of) the flow rate.
• Under conditions of forward flow, if (the absolute value of) the flow
rate equals or exceeds 100 g/s, the mA output will be proportional
to the flow rate up to 20.5 mA, and will be level at 20.5 mA at
higher flow rates.
20
12
4
0 x
Forward Reverse
(2)
flow flow
Flow direction parameter:
• Absolute value
• Bidirectional
• Negate Bidirectional
–x 0 x
Forward
(1) (2)
flow
Zero flow
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