Volumetric Strapping; How The Strapping Table Works; Setting Up (Or Resetting) The Strapping Table; Selecting The Input Mode (Automatic Or Manual) - K-TEK AccuTrak AT100 Installation & Operation Manual

4.0 TRANSMITTER CALIBRATION AND SETUP

4.10 Volumetric Strapping

Note: For AT100 models with Strapping Table option only. If utilizing Foundation Fieldbus refer to section 4.3.5.2
for strapping table instructions.

4.10.1 How the Strapping Table Works

The AT strapping table works by using table points set up by the user. For every point, there is a volume
(provided by the user) and a measurement (provided by either the user or the transmitter). These table points are
used to map sensor measurement to volume output. As the float travels the length of the probe, the volume output
will change based on the two points in the table closest to the given transmitter measurement. With no points in the
table, the volume output is linear between VMN (volume min) at 0 measurement and VMX (volume max) at UTP
(upper trim point) which equates to the highest point of float travel. As points are added, the volume output is
extrapolated with respect to VMN, the table points, and VMX.
The Volumetric Table is capable of being set up in two different modes, Automatic and Manual.
Automatic mode, as a volume point is entered, the position of the transmitter float will determine the transmitter
measurement associated with the volume entered. In Manual mode, as a volume point is entered, the user will be
able to modify the measurement to which the volume corresponds.
The points in the table are listed sequentially on the LCD as O01, O02, I02, ... O19, I19, O20, I20. An „O‟ is
listed for each output point, which corresponds to volume. An „I‟ is listed for each input point, which
sponds to linear measurement. If in manual mode, both output and input points will be available. In automatic
mode, only output points will be shown.

4.10.2 Setting Up (or resetting) the Strapping Table


Under the CAL menu:
-Scroll to VOL TABL, then press SELECT.
-Scroll up to VST RSET, then press SELECT. This will erase any table points currently set.

Under the CFG menu:
-Scroll down to UTP, (which stands for Upper Trim Point) and note the value listed.
-Scroll down to VMX (Volume Maximum).
-Enter for 0 as a value „0000‟, then press SELECT to reset the LCD decimal.
-Next, enter the value of the Maximum Volume corresponding to UTP. Note: Enter only the whole number
of the value, since the decimal is not present, then press SELECT.
-After the decimal has been placed, set any digits to the right of the decimal, if available.
-Scroll up to VMN (Volume Minimum).
-Enter the volume of the tank at 0 measurement on the transmitter probe.

4.10.3 Selecting the Input Mode (Automatic or Manual)


The AT transmitter provides two options for entering the values of the strapping table. The Automatic option
requires the level (or float) to be at the fixed location that corresponds to the selected volumetric output point
when the point is entered. If it is not possible (or feasible) for the tank level to be manipulated but a distance-to-
volume conversion chart is available, the strapping table can be easily set up using Manual mode.

Under the CFG menu:
-Scroll down to VOL MAN or VOL AUTO (the LCD will display the current input mode).
-To switch between modes, press SELECT.
-Scroll UP or DOWN to change the mode.
-Press SELECT
AT100-0200-1 Rev L (10-2010) DCN0528
In
corre-
12