4.3
Calibration for linear volume or weight measurement
The Silometer FMX 570 can also be calibrated in volume or weight units, e.g. in litres,
hectolitres, gallons, %vol, tonnes or kg. After calibration volume (or weight) is displayed
at V0H0. The analogue output must be set in the same units, as described in Chapter 6.
If the level/volume relationship is not linear, i.e. the tank is a horizontal cylinder or has a
conical outlet, the volume calibration is performed as part of the linearization procedure.
In this case, before proceding further, turn to Chapter 5, Section 5.1 or 5.2 to determine
the correct order of parameter entry.
Procedure
Step
Matrix
Entry
Significance
1
V0H1
e.g. 50 hl
Fill the vessel until the probe is covered (ca. 0
…
40%) and
enter the volume (or weight) you wish to have displayed.
2
-
»E«
Register entry
3
V0H2
e.g. 450 hl Fill the vessel as far as possible (ca. 60
…
100%) and
enter the volume (or weight) you wish to have displayed.
4
-
»E«
Register entry
5
V0H0
The measured value is shown in the units selected.
Note!
•
The calibration can be performed in the reverse order.
•
If the level/volume relationship for the vessel is not linear, first see Chapter 5.
BA119Y28
Volume »Empty«
V0H1, e.g. 50 hl
e.g. Deltapilot S
e.g. Capacitance
probe
Volume »full«
V0H2, e.g. 450 hl
Fig. 4.2:
Parameters required for
calibration of the
Silometer FMX 570.
Example for volume
measurement of liquids with
capacitance probe or hydrostatic
pressure sensor
Chapter 4: Calibration and Operation
Silometer FMX 570
19
