2) Calibration for
horizontal cylinders
#
Matrix Entry
Remarks
1
V0H1
E
Tank empty, current
level in %, m, ft
2
-
»E«
Register entry
3
V0H2
F
Tank full, current
level in %, m, ft
4
-
»E«
Register entry
After calibration the level can be read off at
V0H0 in %, ft or m.
Linearisation, horizontal
cylinder
A volume measurement can be made by
calling the linearisation table for horizontal
cylinders. Two parameters are entered:
•
Tank diameter,
D
•
Tank volume,
V
.
#
Matrix Entry
Remarks
5
V2H7
D
Tank diameter,
%, m or ft
6
-
»E«
Register entry
7
V2H8
V
Tank volume*,
hl, gal
…
8
-
»E«
Register entry
9
V2H0
1
Activate linearisation
10 -
»E«
Register entry
* If V =100 is entered, % volume is measured
Offset
The linearisation starts at the tank bottom.
If the zero point of the calibration does not
start at the same point you must now enter
a
negative offset in the units of calibration.
#
Matrix Entry
Remarks
1.
V3H4
–OFF
Offset, m or ft
2
-
»E«
Register entry
After linearisation
•
Volume is displayed at V0H0
•
Level is displayed at V0H9
•
Density correction, p. 29.
Next step
…
Set analogue output and relays in volume
units, see p. 30
…
33.
Note!
•
For linearisation volume => level,
see Appendix, p 46.
V0H1
V0H2
D (V2H7)
E = 0?
OFF (V3H4)
V (V2H8)
»Empty« level E
(0
…
40%)
»Full« level F
(60
…
100%)
BA142_29
probe or
sensor
covered
100%
100% for entries in %
0% for entries in %
0%
100%
Zero point for linearisation
Empty
calibration E
Fig. 4.3:
Parameters for calibration and linearisation in a
horizontal cylinder
Level %: refer E% and F% to the
bottom (0%) and the top (100%)
of the tank! D is then 100%
Note!
Prolevel FMC 661
Chapter 4: Level Measurement
Hauser
25
Содержание prolevel FMC 661
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