Configuring Cutoffs - Emerson Micro Motion 2700 Configuration And Use Manual

Configuration
Figure 4-13 Configuring slug flow limits and duration
MMI Coriolis Flow >
Slug Duration
Slug flow
4.13

Configuring cutoffs

Cutoffs are user-defined values below which the transmitter reports a value of zero for the specified
process variable. Cutoffs can be configured for either mass flow, volume flow, or density.
Table 4-14 lists the default values and relevant comments for each cutoff. Note that the mass flow
cutoff is not applied to the volume flow calculation. Even if the mass flow drops below the cutoff, and
therefore the mass flow indicators go to zero, the volume flow rate will be calculated from the actual
mass flow process variable.
Table 4-14 Cutoff default values and comments
Cutoff
Mass
Liquid volume
Density
To configure cutoffs, refer to the flowcharts in Figure 4-14.
Configuration and Use Manual
EDD
Transducer Block
Calibration
Slug Limit
Slug Low Limit
Bus parameters
Block: Transducer Block 1 (Slot 11)
Index 130 (duration)
Index 131 (low limit)
Index 132 (high limit)
Default value Comments
0.0 g/s Micro Motion recommends a mass flow cutoff value of 0.2% of the
sensor's maximum flow rate for standard operation, and 2.5% of the
sensor's maximum flow rate for empty-full-empty batching.
0.0 L/s The lower limit for volume flow cutoff is 0. The upper limit for volume flow
cutoff is the sensor's flow calibration factor, in L/s, multiplied by 0.2.
3
0.2 g/cm The range for density cutoff is 0.0–0.5 g/cm
Slug High Limit
ProLink II
ProLink >
Configuration
Density tab
Set the density limits:
• Slug Low Limit
• Slug High Limit
Set the slug flow duration in
the Slug Duration box
Apply
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