KROHNE BM 70 A_P EN - Manual (Page 21)

Installation and operating instructions BM 70 A/P Page: 21 11/00
B) Wave-Stick
Note the requirements pertaining to diameter and length of the tank fitting:
min. 50 mm/2"
max. X
Tank nozzle
L
6.1.4 Mounting on stilling wells
Antenna Type Outside
diameter
1 80 mm (3.15”)
1s 76 mm (2.99”)
2, 2s 100 mm (3.94”)
3 140 mm (5.51”)
3s 152 mm (5.98”)
4, 4s 200 mm (7.87”)
If necessary, turn antenna
to size!
Antenna size must match inside
diameter A standard Wave-Stick will not
function in a stilling well! For
stilling wells 40-55 mm a type
Wave-Stick SW can be used.
Further requirements concerning stilling wells:
•
The well must be electrically conductive.
•
Minimum inside diameter of well: 40 mm (1.57"). (BM 70 P: 80 mm,
better > 100 mm).
•
If possible, use only smooth walled, straight stilling wells. If nevertheless an assembled stilling well
is necessary, abrupt changes in diameter along the pipe should be less than 1 mm (0.04"). Surface
roughness of the inside of the pipe should not be more than + 0.1 mm (0.004").
•
For the BM 70 P the antenna types 1s, 2s, 3s or 4s have to be used to achieve a high measuring
accuracy.
Version Length L max.
height of
fitting X
Standard 384 mm
(15.12”)
150 mm
(15.12”)
Option 500...1000 mm
(19.7” - 39.4”)
L - 234 mm
(L - 9.2”)
60mm