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Setting up a volume table - (User menu PCSTAR 2 function 1.7.2 (HART® submenu 2.1.7))
To be able to measure the volume, a conversion table (strapping table) will need to be created using the PCSTAR 2 program or the HART® communicator.
The strapping table assigns defined volumes to the various levels.
In the case of non-symmetrical tanks, e.g. tanks with dished bottom, the accuracy of volumetric measurement will depend on the number of entered “level/volume
pairs”. The maximum number of pairs (points) that can be set is 20.
The volume is linearly determined (interpolated) between 2 points.
The conversion table is generally used for volume, but can also be used for mass and flow.
Five points have been set in the following example.
Example procedure 3: creating a strap table by assigning a volume to a user-defined level (using PCSTAR 2)
Step Action Data entered/value selected
1 Connect to the gauge as described in section 3.3.1. n/a
2 Press function key F2 or left click on F2-connection at the bottom of the window. This will open the user
configuration menu.
n/a
3 Go to user function 1.1.1: Tank height to enter value
(click on field and type in value)
6.00 m
4 Go to user function 1.1.2: Dead zone to enter blocking distance value. 0.40 m
5 Go to user function 1.1.6: Probe length to enter value 5.80 m
6 Go to user function 1.2.4: Length Unit to select length units. m or ft
7 Go to user function 1.2.5: Volume unit to select volume units m³ or ft³
8 Go to user function 1.7.2: Input table. A maximum of 20 points can be entered.
For each point a level and a volume must be entered.
Each point should have a value higher than preceding one.
See table below
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