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Emerson Series 3000 MVD Manuel D’Utilisation

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Configuration and Use Manual
43
Configuring Inputs
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Figure 7-3
Effect of flow direction on milliamp outputs: 4 mA value = 0
Volume flow type
Liquid
• Select the desired volume flow type.
- If you select Liquid, only liquid volume units are available for measurement
- If you select Gas, only gas standard volume units are available for 
measurement. See the section entitled 
• If you are using the enhanced density application or the petroleum 
measurement application, select Liquid.
Volume units
(1)
l/s
• Select the desired unit of liquid volume flow. See Table 7-5. The liquid 
volume totalizer and inventory will use the corresponding volume unit.
Volume low flow 
cutoff
0.00000 l/s
• Enter the liquid volume flow rate below which volume flow outputs and 
displays will indicate zero flow. See the section entitled 
Cutoffs later in this 
chapter.
• Milliamp outputs have an additional cutoff parameter. See Section 8.4.4.
Standard gas volume 
units
(2)
SCFM
• Select the desired unit of gas standard volume flow. See Table 7-6. The gas 
standard totalizer and inventory will use the corresponding volume unit.
Standard gas volume 
cutoff
0.0000 SCFM
• Enter the volume flow rate below which volume flow outputs and displays will 
indicate zero flow. See the section entitled 
Cutoffs later in this chapter.
• Milliamp outputs have an additional cutoff parameter. See Section 8.4.4.
Standard gas density
0.10000 g/cm
3
• Enter the standard density of the gas you are measuring. See the section 
entitled 
(1) Displayed only if Volume Flow Type = Liquid.
(2) Displayed only if Volume Flow Type = Gas Standard.
(3) Available only on systems with the enhanced core processor.
Table 7-2
Flow parameters continued
Variable
Default
Description
Reverse
flow
(1)
20
12
4
x
0
20
12
4
-x
x
0
Milliamp output configuration:
• 20 mA value = x
• 4 mA value = 0
To set the 4 mA and 20 mA values, see 
Section 8.4.4.
Forward 
flow
(2)
Zero flow
Reverse
flow
(1)
Forward 
flow
(2)
Zero flow
Flow direction parameter: 
• Forward only
Flow direction parameter: 
• Reverse only
• Negate/Forward only
20
12
4
-x
x
0
Reverse
flow
(1)
Forward 
flow
(2)
Zero flow
Flow direction parameter: 
• Absolute value
• Bidirectional
• Negate/Bidirectional
(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.
-x
mA outpu
t
mA outpu
t
mA outpu
t