Siemens Sitrans LR400 Instruction Manual page 49

Select the option Calibrate/table or Calculate as required. The selection
Note:
controls the display of Parameter 4.2.5.8. The choices for each parameter are listed
below. For the values associated with Parameter 4.2.5.8: Calculate, go to page 46.
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.
Entering the vessel characteristic with the hand programmer can be a time-
Note:
consuming procedure. It can be done more quickly and comfortably with the SIMATIC
PDM software. There, an entered table can be edited – an option which is only
conditionally possible with the hand programmer.
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 LR400 measures.
1. Enter the appropriate volume (determined by manual calibration).
2. If you access this parameter, first the currently measured level is displayed. Accept it
by pressing LEFT
3. Enter the appropriate volume: save it by pressing RIGHT
LEFT .
4. Then the device displays Calibrate. Access again by pressing RIGHT
further 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.
7ML19985FH06 SITRANS LR400 (7ML5421) – INSTRUCTION MANUAL
.
numerical value
or reject it by pressing
to select a
Page 45