4.3
Calibration: volume measurement
The Silometer FMC 672 Z/677 Z 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/V4H0. The analogue outputs and limit relays must be set in the same
units as described in Chapters 6 or 7.
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, turn to Chapter 5, Section 5.1 or 5.2 to determine the correct order of
parameter entry before proceding further.
Procedure
Step
Matrix
Entry
Significance
1
V0H1
e.g. 50 hl
Fill the vessel until the sensor is just covered (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 (60
…
100%)
and enter the level or volume
4
-
»E«
Register entry
5
V4H1/V4H1
If appropriate, repeat procedure for channel 2
6
V0H0/V4H0
The measured value is shown in the units selected.
Note!
•
The »empty« and »full« calibration can be performed in the reverse order.
•
Once selected the units cannot be changed unless the Silometer is reconfigured.
•
If the level/volume relationship for the vessel is not linear, first see Chapter 5.
BA064E526
»Full«
V0H2
V4H2
e.g 450 hl
»Empty«,
V0H1
V4H1
e.g. 50 hl
Fig. 4.2:
Parameters required for
calibration of the Silometer
FMC 672 Z/677 Z for volume
measurements
Silometer FMC 672 Z/677 Z
Chapter 4: Calibration and Operation
24
