5.1
Linearization for a horizontal cylindrical tank
Use this mode if you have a cylindrical tank which lies horizontally. The Silometer
FMX 570 transmitter uses a stored linearization table which requires the entry of the tank
diameter, tank volume for its volume calculations.
Procedure
Step
Matrix
Entry
Significance
1
V9H5
e.g. 672
Reset, see Section 4.1 (default = operating mode 1)
-
Enter sensor constants at V3H5 and V3H6
2
-
»E«
Register entry
3
V3H0
e.g. 0
Select units to be used for calibration: 0 = level, 1 = volume
4
-
»E«
Register entry
5
V2H7
e.g. 10
Enter tank dia. (for level, in units to be used for calibration)
6
-
»E«
Register entry
7
V2H8
e.g. 200
Enter tank volume in the units you require
-
If 100 is entered, the system measures in % vol.
8
-
»E«
Register entry
9
V2H0
1
Select horizontal cylinder mode
10
-
»E«
Press »E« to activate linearization
11
V0H1/V0H2 -
Calibrate for level or volume , see Section 4.2 or 4.3.
12
V0H0/V0H9 -
V0H0 indicates volume, V0H9 level before linearization
Note!
•
For capacitance or Multicap probes a ground tube is necessary or the liquid must
be conducting.
•
If a level calibration is made, V3H0 = 0, the calibration can preceed the linearization.
•
If the calibration is to be in
volume units (V3H0 = 1), the sequence of steps must be
exactly as shown above.
•
When V3H0 = 1, the entry at V2H7 fixes the end value for the level display at V0H9.
BA119Y41
Units must correspond to
those used for calibration
Diameter:
V2H7
Volume
V2H8
M
a
x.
m
easuri
ng
range
0%
»Empty«
V0H1, e.g.
20%
10%
80%
100%
level
(V0H9)
volume (V0H0)
»Full«
V0H2, e.g.
80%
Fig. 5.2:
Parameters required for
linearization of the Silometer
FMX 570 for a horizontal cylinder
Silometer FMX 570
Chapter 5: Linearization
25
