KROHNE BM 702 A EN - Manual (Page 22)

3
INSTALLATION
22
BM 702 A
www.krohne.com 09/2009 - 4000643301 - MA BM 702 A R01 en
3.6.3 Bypass chambers
Install a bypass chamber next to the tank if:
• There is highly conductive foam in the tank.
• The liquid is very turbulent or agitated.
• There are too many obstacles in the tank.
Figure 3-9: Installation recommendations for bypass chambers
1 Bypass chamber
2 Clearance between the antenna and the wall of the stilling well ≤ 5 mm / 0.2"
3 Sudden change in well diameter ≤ 1 mm / 0.04"
CAUTION!
Installation requirements
• The bypass chamber must be electrically conductive.
• The inside diameter of the bypass chamber must not be more than 10 mm / 0.4" over the
diameter of the antenna.
• The bypass chamber must be straight.
• The bypass chamber must have a surface roughness of ±≤0.1 mm / 0.004".
• There must be no sudden changes in internal diameter greater than 1 mm / 0.04".
.book Page 22 Thursday, September 3, 2009 2:53 PM