Siemens sitrans PROBE LU - Algorithm (P820)

A5E32337695 SITRANS Probe LU (HART) – OPERATING INSTRUCTIONS Page 59
Parameters
P807 Noise
Displays the average and peak ambient noise of a noise profile (in dB above 1 μV rms)
as x.y. Noise level is a combination of transducer acoustic noise and receiving circuitry
noise.
After a measurement, the values from the previous noise shot will be displayed. Press the
measurement key to get a new reading that will update the noise profile.
Algorithm (P820)
P820 Algorithm
Selects the algorithm to be applied to the echo profile to extract the true echo.
For more clarification on the different options, please contact your local representative.
P825 Echo marker
The point on the primary echo on which the measured value is based. The value is
entered in percent of echo height, which allows the Echo Lock Window to be set so that it
intersects the Echo Profile at the sharpest rising portion of the Echo Profile.
Values (view only)
Format
x:y
x = average (range: –20 to 99)
y = peak (range: –20 to 99)
Values
3
Largest echo (L)
4
First echo (F)
8*
best of Largest or First echo (bLF)
12
true First echo (tF)
Values
Range 5 to 95%
Default 50 (%)