Emerson Micro Motion 5700 Configuration And Use Manual page 73

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 Micro Motion 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 Micro Motion for assistance.
Derived variables based on specific gravity
The following derived variables are based on specific gravity:
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If you are using one of these derived variables, two additional parameters can be
configured:
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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:
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Configuration and Use Manual
Specific Gravity
Concentration (Specific Gravity)
Mass Concentration (Specific Gravity)
Volume Concentration (Specific Gravity)
Reference Temperature of Water (default setting: 4 °C)
Water Density at Reference Temperature(default setting: 999.99988 kg/m³)
Modifying names and labels
Configuring extrapolation alerts
Configure process measurement applications
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