Emerson Micro Motion 5700 Configuration And Use Manual page 223

Configuration and Use Manual
MMI-20025166
For each sample, you must be able to obtain a laboratory concentration value at line density and line
temperature.
Procedure
1. Collect data for Comparison 1.
a) Take a concentration reading from the meter and record line density and line temperature.
b) Take a sample of the process fluid at the current concentration.
c) Obtain a laboratory value for concentration at line density and line temperature, in the units
used by the meter.
2. Collect data for Comparison 2.
a) Change the concentration of your process fluid.
b) Take a concentration reading from the meter and record line density and line temperature.
c) Take a sample of the process fluid at the current concentration.
d) Obtain a laboratory value for concentration at line density and line temperature, in the units
used by the meter.
3. Populate the following equation with values from each comparison.
4. Solve for A (slope).
5. Solve for B (offset), using the calculated slope and one set of values.
6. Enter the results as the trim slope and the trim offset.
• Using the display: Choose Menu > Configuration > Process Measurement > Concentration
Measurement > Configure Matrix, select your matrix, and enter Trim Slope and Trim Offset.
Using ProLink III: Choose Device Tools > Configuration > Process Measurement > Concentration
•
Measurement, set Matrix Being Configured to your matrix, and enter Trim Slope and Trim Offset.
Using the Field Communicator: Choose Configure > Manual Setup > Measurements > Optional
•
Setup > Conc Measurement > Configure Matrix and set Matrix Being Configured to your matrix.
Then choose Service Tools > Maintenance > Calibration > Trim CM Process Variables and enter
Concentration Slope and Concentration Offset.
7. Take another concentration reading from the meter, and compare it to the laboratory value.
• If the two values are acceptably close, the trim is complete.
• If the two values are not acceptably close, repeat this procedure.
Calculating the trim slope and the trim offset
Comparison 1
Comparison 2
Populate the equations:
Configuration and Use Manual
Concentration = A × Concentration
Lab
Laboratory value
Meter value
Laboratory value
Meter value
Measurement support
+ B
Meter
50.00%
49.98%
16.00%
15.99%
March 2019
223