Requirements For Derived Variables; Derived Variables And Net Flow Rate; Derived Variables Based On Specific Gravity; Optional Tasks In Setting Up Concentration Measurement - Emerson Micro Motion 5700 Configuration And Use Manual

Configure process measurement applications
March 2019
Table 5-2: Methods to load a matrix file
Action
Load matrix from computer to slot
Load matrix from SD card to slot

Requirements for derived variables

A derived variable is the process variable that a concentration matrix measures. All other process variables are
calculated from the derived variable. There are eight possible derived variables. Each matrix is designed for
one specific derived variable.
The transmitter can store up to six matrices in six slots, and additional matrices on the transmitter's SD card.
All matrices in the six slots must use the same derived variable. If you change the setting of Derived Variable,
all matrices are deleted from the six slots. Any matrices on the transmitter's SD card are not affected.
Tip
Always ensure that Derived Variable is set correctly before loading matrices into slots.

Derived variables and net flow rate

If you want the transmitter to calculate Net Mass Flow Rate, the derived variable must be set to Mass
Concentration (Density). If your matrix is not designed for Mass Concentration (Density), contact customer
support for assistance.
If you want the transmitter to calculate Net Volume Flow Rate, the derived variable must be set to Volume
Concentration (Density). If your matrix is not designed for Volume Concentration (Density), contact customer
support for assistance.

Derived variables based on specific gravity

The following derived variables are based on specific gravity:
• Specific Gravity
• Concentration (Specific Gravity)
• Mass Concentration (Specific Gravity)
• Volume Concentration (Specific Gravity)
If you are using one of these derived variables, two additional parameters can be configured:
• Reference Temperature of Water (default setting: 4 °C)
Water Density at Reference Temperature(default setting: 999.99988 kg/m³)
•
These two parameters are used to calculate specific gravity.
You cannot set these parameters from the display. If the default values are not appropriate, you must use
another method to set them.

Optional tasks in setting up concentration measurement

The following tasks are optional:
• Modifying names and labels
• Configuring extrapolation alerts
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Micro Motion Model 5700 Transmitters with Configurable Outputs
Configuration and Use Manual
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