Siemens sitrans LU01 - Manual (Page 67)

7ML19985BE02 SITRANS LU01 – INSTRUCTION MANUAL Page 61
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P711 Echo Lock
Use this feature to select the measurement verification process.
If a material agitator (mixer) is used in the vessel monitored, set Echo Lock for maximum
verification or material agitator to avoid agitator blade detection. Ensure the agitator is
always ON while the SITRANS LU01 is monitoring the vessel to avoid stationary blade
detection.
When set for max verification or material agitator, a new measurement outside of the
Echo Lock Window (P713) must meet the sampling criterion (P712).
For total lock, Echo Lock Window (P713) is preset to zero 0. The SITRANS LU01
continuously searches for the best echo according to the algorithm chosen (P820). If the
selected echo is within the window, the window is then centered about the echo. If not,
the window widens with each successive shot until the selected echo is within the
window. The window then returns to its normal width.
When Echo Lock is OFF , the SITRANS LU01 responds immediately to a new
measurement as restricted by the Max Fill / Empty Rate (P700 / P701); however,
measurement reliability is affected.
P712 Echo Lock Sampling
The sampling criterion sets the number of consecutive echoes appearing above or below
the echo currently locked onto, that must occur before the measurements are validated
as the new reading (for Echo Lock P711 values: 1 or 2).
Values
0 Off
1 Maximum verification
2 * Material agitator
3 Total lock
Related
• P700 Max Fill Rate
• P701 Max Empty Rate
• P712 Echo Lock Sampling
• P713 Echo Lock Window
• P820 Algorithm
Values
Range: 1:1 to 99:99
Format: x:y
x = the number of above echoes
y = the number of below echoes
Related • P711 Echo Lock
P711 value P712 preset value
1, max verification 5:5
2, material agitator 5:2