Configure API referral using ProLink III
The API referral parameters specify the API table, measurement units, and reference values to be used in
referred density calculations.
Prerequisites
You will need API documentation for the API table that you select.
Depending on your API table, you may need to know the thermal expansion coefficient (TEC) for your process
fluid.
You must know the reference temperature and reference pressure that you want to use.
Procedure
1. Choose Device Tools > Configuration > Process Measurement > API Referral.
2. Specify the API table to use to calculate referred density.
Each API table is associated with a specific set of equations.
a) Set Process Fluid to the API table group that your process fluid belongs to.
API table group Process fluids
A tables Generalized crude and JP4
B tables Generalized products: Gasoline, jet fuel, aviation fuel, kerosene, heating oils,
fuel oils, diesel, gas oil
C tables Liquids with a constant base density or known thermal expansion coefficient
(TEC). You will be required to enter the TEC for your process fluid.
D tables Lubricating oils
E tables NGL (Natural Gas Liquids) and LPG (Liquid Petroleum Gas)
b) Set Referred Density Measurement Unit to the measurement units that you want to use for
referred density.
c) Click Apply.
These parameters uniquely identify the API table to be used to calculate referred density. The selected
API table is displayed, and the meter automatically changes the density unit, temperature unit,
pressure unit, and reference pressure to match the API table.
Your choice also determines the API table that will be used to calculate the correction factor for volume
(CTPL or CTL).
Restriction
Not all combinations are supported by the API referral application. See the list of API tables in this
manual.
3. Refer to the API documentation and confirm your table selection.
a) Verify that your process fluid falls within range for line density, line temperature, and line
pressure.
b) Verify that the referred density range of the selected table is adequate for your application.
Configuration and Use Manual Configure process measurement applications
MMI-20025166 March 2019
Configuration and Use Manual 59
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