Flexim FLUXUS F704**-A2 Series, User Manual

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FLUXUS F70x 13 Libraries
124 UMFLUXUS_F7V4-6-2EN, 2017-10-01
Enter only the parameters needed for the measuring task.
The dependence of the material/medium parameters on the temperature and pressure can be described
• as constants
• as linear function
• with polynomials of grade 1 to 4
• 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 medium 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.
Customized interpolation functions
Some dependencies are only approximated insufficiently by polynomials. A number of customized interpolation functions
Basics: Y=F(X,Z)
are available to interpolate multidimensional dependencies y = f(T, p). Contact FLEXIM for more in-
formation.
13.3.2 Activation of the Extended Library
13.3.3 Input of Material/Medium Parameters
The parameters of a user-defined material/medium can be entered now.
The input of a material or a medium is almost identical. Therefore, the displays for a medium will only be shown and de-
scribed in case of differences.
Example: The density of a medium 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 of the volumetric flow rate will not be affected. However,
the value of the mass flow rate will be wrong.
Select
Special Funct.\SYSTEM settings\Libraries\Extended Library
.
Press ENTER.
Select
on
to activate the extended library. Press ENTER.
Select
Special Funct.\Install Material
or
Install Medium
. Press ENTER.
An error message will be displayed if the coefficient memory does not contain an area for
user-defined materials/media.
Partition the coefficient memory accordingly (see section 13.1).
Select the function for the temperature or pressure dependence of the material/medium pa-
rameters:
Y=const.
: constants
Y=M*X+N
: linear function of the temperature
Y=Polynom
: y = k
0
+ k
1
.
x + k
2
.
x
2
+ k
3
.
x
3
+ k
4
.
x
4
Y=F(X,Z)
: customized interpolation function (only for experienced users or after consulta-
tion with FLEXIM)
go back
: return to the previous menu item
Select a user-defined material/medium.
Extended Library
off
>ON<
Special Funct. ↕
Install Material
USER Material
NOT FORMATTED !
Edit Material ↕
Basics:Y=m*X +n
USER Material ↕
#01:--not used--