18
Defense function
This is the function to mask the undesired reflections from the object which
don’t move at all in the manhole pump system and etc.
Such undesired reflections is masked in case MANU
⇔
OFF
⇔
TRAC is set.
MANUAL setting
50 cm above from B ZERO is memorized as the masked range in case the
setting is changed from OFF to MANU.
Set MANU under the condition that the liquid level is within 50 cm above from
B ZERO.
Tracking setting
Set TRAC from OFF irrespective of liquid level.
The moving liquid level is detected.
[Principle]
Mask data is updated at fixed intervals and moving liquid level is excluded
from the masked object.
While the mask data is updated, the measurement error happens because all
of echoes are masked.
[Caution] In case the undesired reflections and reflections from the
measurement object are overlapped, the measurement error happens.
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