Siemens sitrans PROBE LU Instruction Manual page 60

P801 Range Extension
Note:
SITRANS Probe LU has an absolute maximum range of 7.2 m (23.6 ft). or 14.4 m
(47.24 ft), depending on the model.
Allows the material level to drop below Empty (process empty level), without generating
an LOE state.
Values
Related
Use this feature if the surface monitored can drop below Empty level (P006) in normal
operation. The value for P801 is added to Empty, and the sum can be greater than the
range of the transducer. Range Extension can be increased (in Units or percent of Span)
to a point where Empty plus Range Extension is greater than the distance from the
transducer face to the furthest surface to be monitored. (The distance below empty is not
blanked.)
• Enter the value as a percentage of P006.
• For vessels with conical or parabolic bottoms, increase the value for P801 to ensure
that an empty vessel reads Empty.
P804 Confidence Threshold
Determines which echoes are evaluated by software.
Values
Related Parameters
P804 sets the minimum echo confidence that the echo must meet in order to prevent a
Loss of Echo condition and the expiration of the Failsafe timer (P070).
The short and long shot Confidence Thresholds are preset to 10 and 5 respectively. When
Echo Confidence (P805) exceeds the Confidence Threshold, the echo is evaluated by
Sonic Intelligence.
• Key in the value for the short shot, then press
• Key in the value for the long shot, then press ENTER
Page 54 SITRANS Probe LU – INSTRUCTION MANUAL
Range
Default
P006 Empty
P007 Span
P838 Auto False-Echo Suppression Distance
x:y
Format x = short (range 0 to 99)
y = long (range 0 to 99)
Default 10:5
P070 Failsafe Timer
0 to 99 (% or units)
20.000 (% of Span)
(decimal point).
.
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