(2) Referred density is calculated from line density. You must specify this table, either directly or by selecting the
process fluid and base density measurement unit.
(3) You do not need to specify this table. It is invoked automatically as a result of the previous table selection.
(4) CTL is a correction factor based on online temperature. CTPL is a correction factor based on both line
pressure and line temperature. Calculation of CTL and CTPL for A, B, C, and D table products is in
accordance with API MPMS Chapter 11.1. Calculation of CTL and CTPL for E table products is in accordance
with API MPMS Chapters 11.2.2, 11.2.4, and 11.2.5.
(5) The Thermal Expansion Coefficient (TEC) replaces the referred density calculation. Use the CTL/CTPL table
instead.
5.1.5 Process variables from the API Referral application
The API Referral application calculates several different process variables according to API standards.
CTPL
Correction factor based on line temperature and line pressure.
CTL
Correction factor based on line temperature at saturation conditions.
Referred density
The measured density after CTL or CTPL has been applied.
API volume flow
The measured volume flow rate after CTL or CTPL has been applied. Also called
corrected volume flow.
Batch-weighted
average density
One density value is recorded for each unit of flow (e.g., barrel, liter). The average is
calculated from these values. The average is reset when the API totalizer is reset. Not
available unless a totalizer has been configured with Source set to Corrected Volume
Flow.
Batch-weighted
average
temperature
One temperature value is recorded for each unit of flow (e.g., barrel, liter). The average
is calculated from these values. The average is reset when the API totalizer is reset.
Not available unless a totalizer has been configured with Source set to Temperature-
Corrected Volume Flow.
API volume total
The total API volume measured by the transmitter since the last API totalizer reset. Also
called corrected volume total. Not available unless a totalizer has been configured with
Source set to Corrected Volume Flow.
API volume
inventory
The total API volume measured by the transmitter since the last API inventory reset.
Also called corrected volume inventory. Not available unless an inventory has been
configured with Source set to Corrected Volume Flow.
5.2 Set up concentration measurement
The concentration measurement application calculates concentration from line density and line temperature.
5.2.1 Preparing to set up concentration measurement
The procedure for setting up concentration measurement application depends on how your device was
ordered and how you want to use the application. Review this information before you begin.
Requirements for concentration measurement
To use the concentration measurement application, the following conditions must be met:
• The concentration measurement application must be enabled.
• The API Referral application must be disabled.
• The Advanced Phase Measurement application must be disabled or set for the Liquid with Gas application.
• A concentration matrix must be loaded into one of the six slots on the transmitter.
Configuration and Use Manual Configure process measurement applications
MS-00809-0200-1600 May2024
Configuration and Use Manual 59
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