KROHNE BM 702 A EN - Manual (Page 24)

3
INSTALLATION
24
BM 702 A
www.krohne.com 09/2009 - 4000643301 - MA BM 702 A R01 en
3.7 How to keep false reflections to a minimum
False reflections are caused by:
• Objects in the tank.
• Sharp corners that are perpendicular to the path of the beam.
• Sudden changes in tank diameter in the path of the beam.
If there are too many obstacles in the path of the radar beam, do an empty spectrum scan.
Alternatively, install the device on a bypass chamber or stilling well.
CAUTION!
If there are false reflections, the device will not measure correctly.
False reflections
Figure 3-11: False reflections and deflector plates
1 Sharp corners and sudden changes in tank diameter can cause the device to measure incorrectly
2 Install a deflector plate to prevent false reflections
3 Deflector plate
.book Page 24 Thursday, September 3, 2009 2:53 PM