KROHNE BM 102 Handbook - Manual (Page 61)

BM 102 61
Event
Fault Action
General operation
Instrument is not accurate
with a product that has a
high dielectric. A constant
offset is observed when
taking measurements.
Tank height is not correct. Check current output and tank
height parameters.
If the signal converter has been
replaced, verify that factory
calibration parameters are still the
same. Ask KROHNE** for the
factory calibration sheet (if not
supplied) and the password for
access to the factory menu.
The BM 102 indicates an
incorrect level value. The BM 102 measures a
non-valid reflection. Check the tank for obstructions and
verify that the probe is clean.
In the case the indicated level is
close to the nozzle, increase the
detection delay and the dead zone
with the same ratio or increase the
threshold level if the full
measurement range is essential.
In any case use the PC STAR 2
oscilloscope function to visualise
and to analyse the application.
The threshold level must be
adjusted so that it masks the
disturbances. It also gives enough
margin for detection of the level
pulse.
Very large pulses along the
measurement signal (same
amplitude as the initial pulse) can
be caused by a probe which is
touching the nozzle or the tank side
(see section 1.3.5). Ensure that no
contact is possible.
Instrument is not accurate
when there are two or more
phases in the tank. The instrument may be
incorrectly configured for this
type of application i.e. it is
measuring the interface
instead of the level. Contact KROHNE** for the
corrective procedure or refer to the
Service Manual.
Check that Factory Menu function
1.1.3: Application Type is set to
“2 liquids, 1 level”.
Check also that there is a layer of
more than 100 mm of top product
above the bottom product.
** KROHNE service centre contact details are supplied on the last page of this handbook.