Flexim FLUXUS F808 A1 Series User Manual

FLUXUS F808, F809 14 Libraries
134 UMFLUXUS_F808_8091V1-2-1EN, 2019-08-23
14.3 Extended library
14.3.1 Introduction
If the extended library is activated, it is possible to enter material and fluid parameters as a function of the temperature or
the pressure. These data can be entered into the transmitter directly or by means of the program FluxKoef.
Enter only the parameters 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 1
st
to 4
th
grade 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 parameters, the linearization or the complete neglect of the temperature dependence will not result in a considerable
additional measuring error.
If, however, the process conditions fluctuate strongly and the fluid parameters depend strongly on the temperature (e.g.,
viscosity of a 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 area around the average sound speed of the fluid. Press ENTER.
This display will only be indicated if user has been selected.
Enter the kinematic viscosity of the fluid. Press ENTER.
Enter the density of the fluid. Press ENTER.
Tab. 14.2: Material and fluid parameters that can be stored
parameter parameter 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 measurement
viscosity profile correction of the flow velocity
density calculation of mass flow rate
example: The density of a fluid is unknown. If the mass flow rate is not measured, any constant value can be
entered as the density.
The measurement of the flow velocity and the volumetric flow rate will not be affected. However, the
value 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 F808 A1 Series Specifications

General

Brand	Flexim
Model	FLUXUS F808 A1 Series
Category	Measuring Instruments
Language	English