Prerequisites
You will need an external density measurement method that is highly accurate.
Ensure that your process is stable during the sampling procedure. Minimize variation in
density, temperature, flow rate, and fluid composition. Minimize aeration.
Procedure
1.
Take a density reading from the device.
a. Ensure that line temperature and line pressure are at typical operating levels.
b. Record the line temperature and line pressure.
c. Record the measured density.
2.
Immediately after the previous step, take a sample from a location as close to the
device as possible.
3.
Using the external measurement method, measure the density of the sample at line
temperature and line pressure.
4.
Use the following equation to calculate an appropriate value for
Density Offset
or
Density Meter Factor
.
ρ
Lab
=
(
ρ
Line
× DensityMeterFactor
)
+ DensityOffset
Tip
In most cases, you will calculate and set only one parameter. Follow the guidelines
established for your site.
5.
If you are using the offset to adjust density measurement, set
Density Offset
to the
calculated value.
•
Using the display: Not available
•
Using ProLink III:
Device Tools
>
Configuration
>
Process Measurement
>
Line Density
>
Density Offset
•
Using the Field Communicator:
Configure
>
Manual Setup
>
Measurements
>
Density
>
Density Offset
The default value for
Density Offset
is 0. The range is unlimited.
6.
If you are using the meter factor to adjust density measurement, set
Density Meter
Factor
to the calculated value.
•
Using the display:
OFF-LINE MAINT
>
OFF-LINE CAL
>
DENS MTR F
•
Using ProLink III:
Device Tools
>
Configuration
>
Process Measurement
>
Line Density
>
Density Meter Factor
•
Using the Field Communicator:
Configure
>
Manual Setup
>
Measurements
>
Density
>
Meter Factor
The default value for
Density Meter Factor
is 1.0. The recommended range is 0.8 to 1.2.
If your calculated meter factor is outside this range, contact Micro Motion customer
service.
Measurement support
Configuration and Use Manual
123
Summary of Contents for CDM100M
Page 8: ...Getting Started 2 Micro Motion Compact Density Meters CDM ...
Page 12: ...Before you begin 6 Micro Motion Compact Density Meters CDM ...
Page 20: ...Configuration and commissioning 14 Micro Motion Compact Density Meters CDM ...
Page 26: ...Introduction to configuration and commissioning 20 Micro Motion Compact Density Meters CDM ...
Page 110: ...Integrate the meter with the control system 104 Micro Motion Compact Density Meters CDM ...
Page 116: ...Operations maintenance and troubleshooting 110 Micro Motion Compact Density Meters CDM ...
Page 124: ...Transmitter operation 118 Micro Motion Compact Density Meters CDM ...
Page 194: ...Using the transmitter display 188 Micro Motion Compact Density Meters CDM ...
Page 208: ...Using ProLink III with the transmitter 202 Micro Motion Compact Density Meters CDM ...