Emerson MICRO MOTION 2700 Manual de instalación Pagina 93

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Transmitter Configuration and Use: Series 1000 and 2000 Transmitters 83
Optional Configuration continued
Required Configuration Optional ConfigurationUsing the TransmitterFlowmeter Startup
To use the Gas Unit Configurator:
1. Start ProLink II and connect to your transmitter.
2. Open the
Configuration window.
3. Click the
Special Units tab.
4. Click the
Gas Unit Configurator button.
5. Select the
Time Unit that your special unit will be based on.
6. Click a radio button to specify that your special unit will be defined in terms of
English Units
or
SI (Système International) Units.
7. Click
Next.
8. Define the standard density to be used in calculations.
To use a fixed standard density, click the top radio button, enter a value for standard
density in the
Standard Density textbox, and click Next.
To use a calculated standard density, click the second radio button and click
Next. Then
enter values for
Reference Temperature, Reference Pressure, and Specific Gravity on
the next panel, and click
Next.
9. Check the values displayed.
If they are appropriate for your application, click
Finish. The special unit data will be
written to the transmitter.
If they are not appropriate for your application, click
Back as many times as necessary to
return to the relevant panel, correct the problem, then repeat the above steps.
8.5 Configuring the petroleum measurement application (API feature)
The API parameters determine the values that will be used in API-related
calculations. The API parameters are available only if the petroleum measurement
application is enabled on your transmitter.
8.5.1 About the petroleum measurement application
The petroleum measurement enables Correction of Temperature on volume of Liquids, or CTL. In
other words, some applications that measure liquid volume flow or liquid density are particularly
sensitive to temperature factors, and must comply with American Petroleum Institute (API) standards
for measurement.
Terms and definitions
The following terms and definitions are relevant to the petroleum measurement application:
API – American Petroleum Institute
CTL – Correction of Temperature on volume of Liquids. The CTL value is used to calculate
the VCF value
TEC – Thermal Expansion Coefficient
VCF – Volume Correction Factor. The correction factor to be applied to volume process
variables. VCF can be calculated after CTL is derived
Model 2500 CIO
Model 2700 AN
Model 2700 IS
Model 2700 CIO
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