Emerson Micro Motion 2700 Configuration And Use Manual page 64

Configure process measurement
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Important
• All concentration matrices on your transmitter must use the same derived variable. If you
are using one of the standard matrices from Micro Motion, set Derived Variable to Mass
Concentration (Density). If you are using a custom matrix, see the reference information for
your matrix.
• If you change the setting of Derived Variable, all existing concentration matrices will be
deleted from transmitter memory. Set Derived Variable before loading concentration
matrices.
Load one or more matrices.
a. Set Matrix Being Configured to the location to which the matrix will be loaded.
b. Click Load Matrix from a File, navigate to the matrix file on your computer, and
load it.
c. Repeat until all required matrices are loaded.
Configure or review matrix data.
a. If necessary, set Matrix Being Configured to the matrix you want to configure or
review, and click Change Matrix.
b. Set Concentration Unit to the label that will be used for the concentration unit.
c. If you set Concentration Unit to Special, enter the custom label.
d. If desired, change the matrix name.
e. Review the data points for this matrix.
f. Do not change Reference Temperature or Curve Fit Maximum Order.
g. If you changed any matrix data, click Apply.
Set up extrapolation alarms.
Each concentration matrix is built for a specific density range and a specific
temperature range. If process density or process temperature goes outside the
range, the transmitter will extrapolate concentration values. However, extrapolation
may affect accuracy. Extrapolation alarms are used to notify the operator that
extrapolation is occurring.
a. If necessary, set Matrix Being Configured to the matrix you want to view, and
select Change Matrix.
b. Set Extrapolation Alarm Limit to the point, in percent, at which an extrapolation
alarm will be posted.
c. Enable or disable the high and low limit alarms for temperature and density, as
desired, and select Apply.
Restriction
The high and low limit alarms require the enhanced core processor.
Example: If Extrapolation Alarm Limit is set to 5%, High Extrapolation Limit
(Temperature) is enabled, and the matrix is built for a temperature range of 40 °F to
80 °F, an extrapolation alarm will be posted if process temperature goes above 82 °F
Micro Motion Model 2700 Transmitters with Intrinsically Safe Outputs