Bedienungsanleitung SDT43
BDA Serie SDT43 (Stand Jan. 2018)
Seite 49
It is not advisable to manually adjust the SPAN in program point 1.02 after a linearization has
been configured. If the SPAN is adjusted after a linearization configuration, a warning will
appear on the screen when entering 1.02.
When the a free linearization is used for measuring weight (Kg and Tons), a reliable accuracy
cannot be guaranteed due to external influences such as heat and tank wall expansion.
The
change of Specific Gravity due to different temperatures cannot be compensated by the
SDT43 pressure transmitter.
SIMULATION
After linearization is entered and saved, it is possible to perform a simulation. (Based on the
saved linearization) The transmitter will convert the entered mWc to hectoliters.
FREE LINEARIZATION MANUALLY
When it’s not possible to enter and measure for a linearization in an actual process condition, a
free linearization can be configured manually. Known measurements values and volumes must
be entered manually in the transmitter.
8.
Navigate to program point
1.11 – TANK LIN,
and push the navigation button to enter the menu.
9.
Navigate to
Free lin
. with the navigation button, and push to confirm.
10.
Two choices appear on the screen:
Measured
and
Manual
11.
Select
Manual
to configure a free linearization manually.
12.
Two choices appear on the screen:
Input
and
Simulate
13.
Select
Input
, and push to confirm.
14.
Five choices appear on the screen:
Clear table:
The previous entered values for linearization will be deleted. It is advisable to
use this feature for each time a new linearization is configured.
All entered values and dimensions of an existing / previous linearization will be erased.
Volume units:
Select the preferred unit
:
Liters,
Hectoliters, Kg and Tons (after linearization
the unit can be changed and selected in
1.09
).
Height:
The height of the tank can be filled in (highly recommended for an accurate
linearization). The transmitter will determine with this height the span. A linearization will be
made with the smallest possible deviation.
Factory setting
= Saved span in 1.02.
Start Point:
The contents of a tank can be configured up to 70 points. The entered value’s
must be from low to high (Filling an empty tank). The manually entered values will be
displayed on the screen in percentage (%) for
Xn
and for
Yn
in Hectoliters. To enter the next
measured point move the navigation button up and enter the values.
Example
:
A t
ank filling must
programmed
in the
transmitter.
Choose
Clear Table
to remove all
possible previous settings.
Choose the preferred
Volume units.
Fill in the
Height
of the tank (highly
recommended for an accurate
linearization).
In menu
Start Point
the linearization
points can be filled in. In
Xn1
the
percentage of the filling must be filled
in. In
Yn1
the corresponding volume.
Yn5 : 85%
Xn5 : 3400 liter
Yn4 : 65%
Xn4 : 2600 liter
Yn3 : 40%
Xn3 : 1600 liter
Yn2 : 8 %
Xn2 : 320 liter
Yn1 : 0 %
Xn1 : 0 liter
