Modify Extrapolation Alerts For Concentration Measurement Using A Basic Ff Host - Emerson Micro Motion 2700 Configuration And Use Manual

Configure process measurement
3.
4.9.3 Modify extrapolation alerts for concentration
measurement using a basic FF host
You can enable and disable extrapolation alerts, and set extrapolation alert limits. These
parameters control the behavior of the concentration measurement application but do
not affect measurement directly.
Each concentration matrix is built for a specific density range and a specific temperature
range. If line density or line temperature goes outside the range, the transmitter will
extrapolate concentration values. However, extrapolation may affect accuracy.
Extrapolation alerts are used to notify the operator that extrapolation is occurring.
Each concentration matrix has its own extrapolation alert limits.
Procedure
1.
2.
50
Table 4-3: Concentration unit codes
Fieldbus code
1110
1426
1111
1112
1343
1344
1427
1428
1429
1346
253
Write a value into the Special Concentration Unit Label parameter if Concentration
Unit is set to code 253 (special).
Choose the matrix you want to configure using the Active Matrix parameter in the
Concentration Measuremnt TB. Each saved matrix has a unique value of 0 through 5.
Write the desired values into the appropriate parameters in the Concentration
Measuremnt TB.
Parameter name
Extrapolation Limit
Density Low
Micro Motion Model 2700 Transmitters with FOUNDATION Fieldbus
Unit
degTwad
degBrix
degBaum hv
degBaum It
% sol/wt
% sol/vol
degBall
proof/vol
proof/mass
% plato
special
Description
Extrapolation Alert Limit The point, in percent, at which
an extrapolation alert will be posted.
Enable low density extrapolation alarm (write 1 to ena-
ble; 0 to disable).