6.4 Linearisation
Linearisation mode
Linearisation enables volumetric measurement to be carried out in vessels, e.g. with
conical outlets in which the volume is not directly proportional to the level. The table below
gives a summary of the linearisation function (V3H6) that is available with the operating
mode "Level manual" (V3H0). Linearisation follows a calibration in the volumetric units
required. The units for level, volume or weight are selectable using the "Unit after
Linearisation" (V3H3) parameter (see also tables, page 28).
Warnings
When activated, the linearisation curve is checked for plausibility.
The following warnings may occur:
After selecting the operating mode "Level manual", the following error message may be
displayed:
Entry
V3H6
Linearisation mode
Meaning
1
Manual entry
For a linearisation curve a max. 21 pairs of values for a % level and
the appropriate % volume are entered.
2
Semi-automatic entry of a
linearisation curve
"gauging"
With semi-automatic entry of the linearisation curve the tank is
filled or emptied. The height is automatically determined by the
Cerabar S by the hydrostatic pressure, the appropriate volume is
entered.
In addition V3H6 offers the functions:
0
Activating table
A linearisation table is valid only if it is specifically activated.
3
Deleting table
Before entering a linearisation table, any existing table must first be
deleted. The linearisation mode automatically jumps to linear.
Code
Type
Meaning
E605
Error
The manual linearisation curve is incomplete or no linearisation
curve is stored.
Enter the linearisation curve in the operation mode "Level linear"
and then select the operation mode for the characteristic curve.
Code
Type
Meaning
E602
Warning
The linearisation curve does not rise or fall evenly
The number of the last valid pair of values appears automatically in
V3H7. All pairs of values must be re-entered from this number
onwards.
E604
Warning
The linearisation curve consists of less than two pairs of values.
Further pairs of values must be entered.
6 Level Measurement
Cerabar S
32
Hauser
