9 Measurement
FLUXUS H721 9.1 Enabling the HPI measuring mode
101
UMFLUXUS_H721V1-5EN, 2022-05-15
Assignment of a source item
• Select the source item (recommended: = physical quantity) whose measured value, status value or event value is to be
displayed.
• Press ENTER.
Selection of the CTL calculation
Correction of the temperature influence on the fluid. The following table provides an overview of the selectable calculation
types.
• Select the CTL calculation to be used.
• Press ENTER.
• Select a list item to be used as a basis for the calculation.
• Press ENTER.
Special functions\Measurement\Measurement modes\...\Source item
Tab. 9.1: CTL calculation
CTL calculation basis explanation
Density Analysis
Basic curve
The CTL factor is determined from the relation of the calculated density
and the standardized density.
The default setting is Analysis.
In case the density cannot be determined from the measured sound
speed and temperature, Basic curve is selected. The fluid
temperature entered in the program branch Parameters will be used.
ASTM1250 Crude oil
Fuel oils
Jet fuels
Transition zone
Gasolines
Lubricating oil
Special application
calculation according to section 11.1 of the MPMS (Manual of Petroleum
Measurement Standards)
ASTM4311 15 °C - group A
15 °C - group B
60 °F - group A
60 °F - group B
calculation for heavy hydrocarbons, e.g., bitumen
TP25 1 EE (68/32)(1)
2 Ethane
3 EP (65/35)(2)
4 EP (35/65)(3)
5 Propane
6 i-Butane
7 n-Butane
8 i-Pentane
9 n-Pentane
10 i-Hexane
11 n-Hexane
12 n-Heptane
calculation according to section 11.2.4 of the MPMS (Manual of
Petroleum Measurement Standards)
Special functions\Measurement\Measurement modes\...\CTL method
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