Flexim FLUXUS F801 User Manual

15 Libraries FLUXUS ADM 8027, F801, ADM 8127B
UMFLUXUS_F8V4-6-1EN, 2018-10-10 107
15.3 Extended Library
15.3.1 Introduction
If the extended library is activated, it is possible to enter material and fluid properties as a function of the temperature or of
the pressure directly into the transmitter or by means of the program FluxKoef.
Enter only the properties needed for the measuring task.
The dependence of the material/fluid parameters on the temperature and pressure can be described
• as constants
• as linear function
• with polynomials of grade 1 to 4 or
• with customized interpolation functions.
In most cases, constants or a linear function are sufficient.
If, e.g., the temperature fluctuations at the measuring point are low compared to the temperature dependence of the mate-
rial properties, the linearization or the complete neglect of the temperature dependency will not result in a considerable ad-
ditional measuring error.
If, however, the process conditions fluctuate strongly and the fluid parameters depend strongly on the temperature (e.g.,
viscosity of hydraulic oil), polynomials or customized interpolation functions should be used. Contact FLEXIM to find the
best solution for the measuring task.
Select auto or user. Press ENTER.
auto: The area around the average sound speed is defined by the transmitter.
user: The area around the average sound speed has to be entered.
Enter the range around the average sound speed of the fluid. Press ENTER.
This display will only be indicated if user is selected.
Enter the kinematic viscosity of the fluid. Press ENTER.
Enter the density of the fluid. Press ENTER.
Tab. 15.2: Material and fluid parameters that can be stored
parameter parameters necessary for...
material parameter
transversal sound speed flow measurement
longitudinal sound speed flow measurement
type of sound wave flow measurement
typical roughness profile correction of the flow velocity
fluid parameter
sound speed start of the measurement
viscosity profile correction of the flow velocity
density mass flow rate calculation
Example: The density of a fluid is unknown. If the mass flow rate is not measured, any constant value can be en-
tered as the density.
The measurement of the flow velocity and the volumetric flow rate will not be affected. However, the val-
ue of the mass flow rate will be wrong.
c-Medium range
auto >USER<
c-Medium=1500m/s
range +-150m/s
Kinem.Viscosity
1.01 mm2/s
Density
1.00 g/cm3

Flexim FLUXUS F801 Specifications

General

Brand	Flexim
Model	FLUXUS F801
Category	Measuring Instruments
Language	English