KROHNE BM 70 M User Manual
Page 43
BM 70 M
43
8.6.2 Vessel (tank) height
Fct. 3.1.1 TANKHEIGHT
•
Definition of the tank height for the BM 70 M: Distance between the top edge of the tank fitting
and the lower reference point.
•
The lower reference point is that "point" in the vessel on which the microwaves emitted by the
BM 70 M impinge and from which they are reflected. This can be the tank bottom (symmetrical
tank with flat bottom) or the non-horizontal part of the bottom (e.g. tank with dished bottom) or
an additionally fitted plate. The BM 70 M cannot measure below the lower reference point
(usually a "sump" is left in the tank, see diagram in Sect. 8.5).
•
Selection of unit, see Sect. 8.6.1.
•
Setting ranges for the tank height BM 70 (standard):
00.50
-
40.00
m
0050
-
4000
cm
00500
-
40000
mm
0019.7
-
1574.74
inch
001.64
-
131.22
ft
For BM 70 M: max. 35m / 1377.9 inch / 114.8 ft
•
Depending on the version, it is also possible to set an upper limit for the tank height. The
maximum value can be increased by KROHNE Service to up to 100 m.
•
The tank height set at this point is simultaneously the upper limit of the setting ranges for the
following functions:
Block distance
Fct. 3.1.2
Antenna extension
Fct. 3.1.4
Hysteresis, switching output
Fct. 3.6.4
•
If the tank height is changed to a value greater than 30 m, a new empty spectrum must
subsequently be recorded, see Sect. 8.6.12.
H
AV
BD
O-Ref (+)
O-TB (+)
DS
O-Ref
O-TB
H
AV
BD
- Antenna extension
Fct. 3.1.1 [0.00 m ... max. tank height]
Fct. 3.1.4 [0.00 m ... Tank height]
Fct. 3.1.2 [0.10 m ... Tank height]
Fct. 3.1.7 [ -10.00 ... + 10.00 m]
Fct. 3.1.8 [ -100.00 ... + 100.00 m]
DS
Fct. 3.1.5 [0 ... 2000 mm]
Bottom edge of flange
Product surface
datum plane for distance
Level
tank bottom
distance
- tank height
- block distance
- distance piece
- reference offset
- tank bottom offset
datum plane for level