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Measurement Verification Parameters (P709 to P713)
P709 Damping Filter
Stabilizes the reported level due to level fluctuations (such as a rippling or splashing
liquid surface) within the Echo Lock Window (P713). The value is in seconds, and depends
on the number of seconds it takes the device to reach 63.2% of a step value change in
reading.
Values
Related Parameters
P711 Echo Lock
Selects the measurement verification process.
Values
(P711)
Related Parameters
If a material agitator (mixer) is used in the vessel monitored, set Echo Lock to 1 (maximum
verification) or 2 (material agitator) to avoid agitator blade detection. To avoid stationary
blade detection, ensure the agitator is always running while the SITRANS LR 300 is
monitoring the vessel.
When set for 1 (maximum verification) or 2 (material agitator), a new measurement
outside of the Echo Lock Window (P713) must meet the sampling criterion (P712).
For 3 (total lock), Echo Lock Window (P713) is pre-set to 0 (zero). The SITRANS LR 300
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 0 (off), the SITRANS LR 300 responds immediately to a new
measurement, within the constraints set by the Max Fill/Empty Rate (P700/P701).
However, measurement reliability is affected.
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0 to 100
Range:
P007 Span
P713 Echo Lock Window
(F = 2)
0
off
1
maximum verification
2
material agitator
3
total lock
P700 Maximum Fill Rate
P701 Maximum Empty Rate
P712 Echo Lock Sampling
P713 Echo Lock Window
P820 Algorithm
SITRANS LR 300 – INSTRUCTION MANUAL
(0= off)
7ML19985CL02
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