Extend Near Blanking to overcome measurement difficulties which cannot be corrected
by transducer location, mounting, or aiming.
The causes of measurement difficulties which may be corrected include:
» a vessel obstruction partly blocking the transducer acoustic beam.
» a transducer standpipe mount that is too narrow for its length.
» a transducer mounting which is resonant at the transducer frequency.
Extend Near Blanking to 150 mm ( 6 in ) beyond the incorrect distance measured.
Ensure the Near Blanking distance is less than Empty ( P006 ) - Span ( P007 ).
To reset the automatic Near Blanking value...
values: 0.000 to 9999
P801 RANGE EXTENSION
Use this feature if an incorrect level is reported (when material level is lower than Empty, P006).
Range Extension is the distance in Units ( P005 ) or % of Span ( P007 ) beyond Empty,
which is still ultrasonically measurable.
If Empty is substantially higher than the actual vessel bottom, increase Range Extension such
that Empty plus Range Extension is greater than the transducer to vessel bottom distance.
This value is automatically preset to 20% of Span ( P007 ).
values: 0.000 to 9999
P802 SUBMERGENCE TRANSDUCER
Use this feature (if desired) when the transducer connected is equipped with a
submergence shield.
When the transducer is submerged, the XPL+ detects that the monitored surface is within the
Near Blanking (P800) distance, and immediately advances to "zero" distance operating
displays and outputs accordingly.
values: 0 = off (preset)
1 = submergence transducer
PL-532 68
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