Milltronics AiRanger SPL PL-573, Instruction Manual

Page: 69 / 113

PL-573 AiRanger SPL Page 69
Enhancement Param.
Echo Processing Parameters (P800 to P807)
P800 Near Blanking
Use this feature if the material level is incorrectly reported to be near the transducer
face.
The Near Blanking distance (distance from the transducer face which is not
ultrasonically measurable) is automatically set to minimum, when the Transducer
(P004) value is entered.
Near Blanking may be extended to overcome measurement difficulties which cannot
otherwise be corrected by transducer location, mounting, or aiming modification. (e.g.
partial acoustic beam obstruction, standpipe open end detection, etc.)
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 press .
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 when the transducer connected is equipped with a submergence
shield.
If the transducer is submerged, the SPL detects that the monitored surface is within
the Near Blanking (P800) distance, to activate failsafe operation (subject to Failsafe
Parameter programming).