KROHNE OPTIWAVE 5200 C_F EN - Manual (Page 100)

8
TECHNICAL DATA
100
OPTIWAVE 5200 C/F
www.krohne.com 07/2013 - 4001904902 - HB OPTIWAVE 5200 R02 en
"TBF Partial" mode "TBF Partial" mode "TBF Partial" mode "TBF Partial" mode
If the dielectric constant of the liquid is low (ε
r
≥1.8, for long distance measurement), you must
use "TBF Partial" mode to measure level correctly. TBF Partial" is an automatic mode that lets
the device make a selection between "Direct mode and "TBF" mode. If the device finds a large
radar reflection above the "tank bottom area" (the bottom 20% of the tank height), the device will
use "Direct" mode. If the device finds a large radar reflection in the "tank bottom area", the
device uses TBF mode. This mode can be used only in tanks with flat bottoms.
"Full TBF" mode "Full TBF" mode "Full TBF" mode "Full TBF" mode
TBF = Tank Bottom Following. If the dielectric constant of the liquid is very low (ε
r
<1.8), you
must use "Full TBF" mode to measure level correctly. The device uses the radar reflection on
the bottom of the tank (the signal goes through the liquid). This mode can be used only in tanks
with flat bottoms.
CAUTION!
"FULL TBF" AND "TBF PARTIAL" MODES
It is important to enter the correct dielectric constant value in menu item 2.5.3 Er Product. If not,
the device will not measure level accurately.