Configuration and Use Manual 77
Configuring the Petroleum Measurement Application
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9.4.1 Reference tables
Reference tables are organized by reference temperature, CTL derivation method, liquid type, and
density unit. The table selected here controls all the remaining options.
• Reference temperature:
- If you specify a 5x, 6x, 23x, or 24x table, the default reference temperature is 60
°F, and
cannot be changed.
- If you specify a 53x or 54x table, the default reference temperature is 15 °C. However, you
can change the reference temperature, as recommended in some locations (for example, to
14.0 or 14.5 °C).
• CTL derivation method:
- If you specify an odd-numbered table (5, 23, or 53), CTL will be derived using Method 1
(described in Section 9.3.2).
- If you specify an even-numbered table (6, 24, or 54), CTL will be derived using Method 2
(described in Section 9.3.2).
• The letters A, B, C, or D that are used to terminate table names define the type of liquid that the
table is designed for:
- A tables are used with generalized crude and JP4 applications.
- B tables are used with generalized products.
- C tables are used with liquids with a constant base density or known thermal expansion
coefficient.
- D tables are used with lubricating oils.
• Different tables use different density units:
-Degrees API
- Relative density (SG)
- Base density (kg/m
3
)
Table 9-2 summarizes these options.
Table 9-2 API reference temperature tables
Table
CTL
derivation
method Base temperature
Density unit and range
Degrees API Base density Relative density
5A Method 1 60 °F, non-configurable 0 to 100
5B Method 1 60 °F, non-configurable 0 to 85
5D Method 1 60 °F, non-configurable –10 to +40
23A Method 1 60 °F, non-configurable 0.6110 to 1.0760
23B Method 1 60 °F, non-configurable 0.6535 to 1.0760
23D Method 1 60 °F, non-configurable 0.8520 to 1.1640
53A Method 1 15 °C, configurable 610 to 1075 kg/m
3
53B Method 1 15 °C, configurable 653 to 1075 kg/m
3
53D Method 1 15 °C, configurable 825 to 1164 kg/m
3
Reference temperature Supports
6C Method 2 60 °F, non-configurable 60 °F Degrees API
24C Method 2 60 °F, non-configurable 60 °F Relative density
54C Method 2 15 °C, configurable 15 °C Base density in kg/m
3
