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FC7x0
Advanced functions
Functional scope
SITRANS FC7x0
Net Oil
Computing
following API
standard
Tube Health Check
Batching
function
Viscosity function
Measurement of heat
quantity
meaning of "−": not available;
meaning of "●": available
20.2 Concentration and petroleum measurement
Standard concentration measurement
The standard concentration measurement (option S16) can be used for concentration
measurements of emulsions or suspensions when density of the fluid involved depends
only on temperature.
The standard concentration measurement can also be used for many low-concentration
solutions if there is only minor interaction between the liquids or if the miscibility is
negligible. For questions regarding a specific application, contact the responsible
Siemens sales organization. The appropriate density coefficients must be determined
prior to using this option and input into the transmitter. To do so, the recommendation is
to determine the necessary parameters from density data using DTM in the Pactware
program or the calculation tool included in the delivery.
Petroleum measurement function NOC (option S14)
"NOC" is an abbreviation for the "Net Oil Computing" function that provides real-time
measurements of water cut and includes "API" (American Petroleum Institute) correction
according to API MPMS Chapter 11.1.
Oil sometimes contains entrained gas. SITRANS FC measures the density of the
emulsion oil and gas which is lower than the oil density. If the measured density is used
to calculate volume flow of oil, the result would not be correct. Therefore NOC function
(option S14) includes also a Gas Void Fraction function (GVF). GVF may reduce the error
in oil volume flow calculation at a minimum recognizing the occurrence of gas in the oil
and using the oil density to calculate the volume flow.
Oil properties can be selected using Oil type's pre-settings or using "Alpha 60".
Oil and water types predefined in the functions
Oil types
▪ Crude
▪ Refined Products:
▪ Lubricating
▪ Custom Oil
166 / 180
Advanced functions per product
SITRANS FC1x0
●
●
●
●
●
Fuel, Jet Fuel, Transition,
Gasoline
A5E52748387-AA, 2023/09
Concentration and petroleum measurement
SITRANS FC6x0
●
●
●
●
●
●
●
●
●
●
Water types
▪ Standard Mean Ocean Water
▪ UNESCO 1980
▪ Fresh water density by API MPMS 11.4
▪ Produced water density by API MPMS
20.1
Appendix A.1
▪ Brine water density by El-Dessouky,
Ettouy (2002)
▪ Custom
SITRANS FC5x0
●
●
●
●
●
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