Siemens sitrans LR 400 Instruction Manual page 50

The possibilities of each parameter are listed below. For the values associated with
Parameter 4.2.5.8: Calculate, go to page 47.
4.2.5.8: Calibrate/table
If your vessel deviates from the forms offered, the necessary data is not available or is
unknown, or you need a vessel characteristic with greater accuracy you will need to use
a level/volume calibration table. You can enter reference values from a table provided by
the vessel manufacturer or do the calibration manually and enter the determined
reference values.
You can only enter pairs of values consisting of level and volume.
Note:
Entering the vessel characteristic with the operation and monitoring module
can be a time-consuming procedure. It can be done more quickly and comfortably
with the SIMATIC PDM software. There, an entered table can be edited simply – an
option which is only conditionally possible with the operating and monitoring module.
The 4.2.5.8 Calibrate/table parameter offers the following selection possibilities:
4.2.5.8.1: Calibrate
Here you can enter up to 50 reference values whose levels SITRANS LR 400 measures.
Enter the appropriate volume (determined by manual calibration).
If you access this parameter, first the currently measured level is displayed. Accept it by
pressing . Enter the appropriate volume: save it by pressing
.
Then the device displays Calibrate. Access again by pressing
reference value. The device automatically offers you the next undefined reference value.
We recommend entering a maximum of two or three reference values for the linear range
of the vessel and to use the others for the non-linear portion.
If you enter a second volume value for the same level, the reference value saved earlier is
overwritten.
4.2.5.8.2: Enter table
Manual entry of a table
Value
Here you can enter up to 50 reference values provided by the vessel manufacturer in any
order.
The first reference value is offered when you access the parameter. Enter the level as a
distance from the floor of the vessel in the units selected according to Parameter 4. 1 .1
(Enter level) and the volume corresponding to the level (Enter volume).
Page 46
numerical value
SITRANS LR 400 – INSTRUCTION MANUAL
or reject it by pressing
to select a further
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