Micro Motion CDM100M, Configuration And Use Manual

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3. Subtract the meter value from the laboratory value.
4. Enter the result as the trim offset.
• Using the display: Not available
• Using ProLink III:
Device Tools
>
Configuration
>
Process Measurement
>
Concentration
Measurement
• Using the Field Communicator:
Configure
>
Manual Setup
>
Measurements
>
Optional
Setup
>
Concentration Measurement
>
Trim CM Process Variables
>
Concentration Offset
5. 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.
Example: Calculating the trim offset
Laboratory value 64.21 °Brix
Meter value 64.93 °Brix
64.21 − 64.93 = −0.72
Concentration offset:
−
0.72
Related information
Adjust concentration measurement with
Trim Offset
and
Trim Slope
9.6 Adjust concentration measurement with
Trim
Offset
and
Trim Slope
Trim Offset and Trim Slope adjust the meter's concentration measurement to match a
reference value.
Tip
You can adjust concentration measurement by applying the trim offset only, or by applying both the
trim offset and the trim slope. For most applications, the trim offset is sufficient.
Prerequisites
You must be able to take measurements of your process fluid at two different
concentrations.
You must be able to take a sample of your process fluid at each of these concentrations.
For each sample, you must be able to obtain a laboratory concentration value at line
density and line temperature.
Measurement support
Configuration and Use Manual 129