KROHNE BM 102 Handbook - Manual (Page 56)

56 BM 102
3.4.3 Level measurement when more than one phase or layer in the tank
Level can be measured with more than one phase in the tank. This requires setting a parameter in
the factory menu (Fct. 1.1.3: Application Type) to the following measurement mode:
• 2 liquids, 1 level
for measuring level with two or more phases
• 1 liquid, 1 level for measuring one phase or liquid
Characteristics
• The level of the top product can be detected if it has a minimum layer of approximately
100 mm – when measuring a top product with a dielectric constant of 2.4.
• The mode “2 liquids, 1 level” permits level to be measured even when more than 2 liquids are
present in the tank.
• The first return signal is identified as being level and the second is ignored.
• This mode may be used with all probe types.
Example application 1: level measurement of oil (1 liquid in the tank)
With Factory Menu Fct. 1.1.3:
Application Type set to 1 liquid, 1
level, the BM 102 will search for the
return signal with the highest
amplitude (i.e. higher than the
threshold). It will measure the oil
level.
1
Level measurement signal
2 Threshold
Example application 2: level measurement when there are 2 liquids (oil/water) in the tank –
using a correctly configured gauge
With Factory Menu Fct. 1.1.3:
Application Type set to 2 liquids, 1
level, the BM 102 will search for the
first return signal higher than the
control threshold. It will correctly
measure the oil level (i.e. “level”).
1
Level signal
2
Threshold - finds first signal
3
Oil-water interface signal
For further information, please
contact your local KROHNE Service
Centre. Contact details are supplied
on the last page of this manual.