2. If the concentration measurement application is enabled, disable it and click Apply.
The concentration measurement application and the API referral application cannot
be enabled simultaneously.
3. Enable API Referral and click Apply.
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 > Petroleum Measurement.
2. Specify the API table to use.
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)
Note
The API referral application is not appropriate for the following process fluids: ethanol,
butadiene and butadiene mixes, isopentane, LNG, ethylene, propylene, cyclohexane,
aeromatics, asphalts, and road tars.
b. Set Referred Density Measurement Unit to the measurement units that you want to
use for referred density.
c. Click Apply.
Configure process measurement
Configuration and Use Manual 35
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