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8.4
Vessel shape and dimensions
The device can be configured to suit many common vessel shapes. See Vessel shape (2.5.1)
(Page 123). Whenever possible, use one of the pre-defined selections. If one of the pre-defined
selections is not applicable, a custom volume calculation can be used. (Configure a custom
application by setting parameter "Operation" or "PV selection" to option "Custom", then define
your vessel shape using Custom (2.6) (Page 126).) For more details, see Technical reference
(Page 201).
Each vessel shape uses the empty distance value in its calculations of volume. See PV
selection (2.1.1) (Page 114) for an illustration.
Some vessel shapes also require extra dimensions to calculate the volume. Do not estimate
these values as they must be exact to ensure the accuracy of your volume calculations.
Example:
To configure volume for a vessel with a half-sphere bottom, set the following:
①
Parameter
Vessel shape
Upper scaling point
Vessel dimension A
Note
Example outcome
• The default reading changes to a range from 0 to 100, which is the value in parameter Upper
scaling point (2.5.5) (Page 125).
• The process empty value is still measured to the bottom of the vessel (value in parameter
"Lower calibration point"), not the top of dimension A.
8.5
Simulation
Process values, loop current, and diagnostics can be simulated with this device. Distance process
value can be simulated via the HMI, or via an engineering system such as SIMATIC PDM. Process
values and diagnostics can be simulated via a remote engineering system.
Current output simulation
The current output can also be simulated using Loop test (3.8.1) (Page 143).
SITRANS LR500 series with mA/HART
Operating Instructions, 03/2024, A5E51099898-AA
Vessel dimension A
Sample value
Half sphere bottom vessel
100
1.3
8.5 Simulation
Description
Sets correct vessel shape
Sets upper scaling at 100
(defined in "Volume units")
Sets dimension A to 1.3 m
Operating
89
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Table of Contents
Troubleshooting
