Configuration & Calibration
57
4.3.4 Strapping Table
The strapping table is a 2-point to 21-point table used by the
Universal IV to define the relationship between level and
output current. There are five strapping tables built into
the transmitter software. These are: Linear (vertical tank);
Horizontal Tank with flat ends; Horizontal Tank with dished
ends; Horizontal Tank with hemispherical ends; and Spherical
Tank. These predefined tables are automatically created
by selections made with Vessel Config assignment during
Configuration procedure in Section 4.3.
If output-to-level relationship is not defined by one of these
tables, you may create a table in Strapping Table program. To
create a non-linear relationship, you will need at least 3 points
and may use as many as 21 points. A 21-point table will define
relationship to approximately a 0.1% accuracy. Common example
for a simple table would be Cone Bottom Vertical tank which
would require 3 points—bottom, straight-side target point, and
top. However, a more complex geometry could benefit from using
all 21 available points.
• Plan your table by filling out the form below. You may
use first column which lists every 5% between 0 and
100%, or you may fill in your own values in column 2.
• Fill out column 3 with output values corresponding to
those listed in column 1 or 2.
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