Emerson Series 3000 MVD Manuel D’Utilisation

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Core processor inputs are enabled by default. By disabling the core processor, you disable all core 
processor input signals and alarms. Disabling them might be desirable while you are connecting the 
sensor, or if you are using only the frequency input to measure flow. 

Table 7-1 describes the core processor input options.

Process variables include mass flow, volume flow, density, and temperature. For each process 
variable, several parameters can be configured.

Mass flow and volume flow parameters are listed and defined in Table 7-2. Note that you can 
configure the transmitter to measure either liquid volume flow or gas standard volume flow, 
depending on the setting of Volume Flow Type. 

Details about the Flow Direction parameter are provided in Table 7-3. Units for mass flow and 
volume flow parameters are listed in Tables 7-4 through 7-6. Special units for mass and volume are 
defined and described in the section entitled Special units later in this chapter.

Enable core processor

Yes

If set to No:

• The platform will not use input signals from the sensor to measure flow, 

density, or temperature.

• The platform will not produce the following alarms: warming up, cal in 

progress, drive overrange, temperature overrange, temperature failure, 
sensor failure, transmitter failure, density overrange, density failure, mass 
flow overrange, volume overrange, calibration failure, calibration complete, 
calibration aborted, RTD failure, charize required, slug flow, slug timeout

(1)

.

(1) For more information about alarms, see Chapter 22.

Flow damping

0.8 sec

• Damping filters out noise or the effects of rapid changes in the flow rate 

without affecting measurement accuracy. See the section entitled 

Damping 

later in this chapter. For gas applications, Micro Motion recommends a 
minimum flow damping value of 2.56 seconds. Range is 0.0–51.2 seconds.

• Milliamp outputs have an additional damping parameter. See Section 8.4.4.

Flow direction

Forward

• Controls how flow through the sensor will affect outputs and totalizers.
• For the effect of flow direction on milliamp outputs, see Figure 7-3 if the 4 mA 

value of the milliamp output is set to 0, and see Figure 7-4 if the 4 mA value 
of the milliamp output is set to a negative value. For a discussion of these 
figures, see the examples following the figures. For information on setting the 
4 mA value, see Section 8.4.4.

• For the effect of flow direction on frequency outputs, totalizers, and flow 

values reported via digital communication, see Table 7-3.

Mass units

g/s

• Select the desired unit of mass flow. See Table 7-4.
• Mass flow outputs and displays will indicate mass flow in the selected unit. 

The mass totalizer and inventory will use the corresponding mass unit.

Mass low flow cutoff

0.00000 g/s

• Enter the mass flow rate below which mass 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.