A5E32337695 SITRANS Probe LU (HART) – OPERATING INSTRUCTIONS Page 57
Parameters
P801 Range Extension
Allows the material level to drop below Empty (process empty level), without generating
an LOE state.
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.
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 (decimal point).
• Key in the value for the long shot, then press ENTER .
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.
Values
Range 0 to 25 (% or units)
Default 20.000 (% of Span)
Related
P006 Empty
P007 Span
P838 Auto False-Echo Suppression Distance
Values
Format
x:y
x = short (range 0 to 99)
y = long (range 0 to 99)
Default 10:5
Related Parameters
P070 Failsafe Timer
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