Siemens SITRANS LR560 Operating Instructions Manual page 156

Echo Confidence: describes the quality of an echo. Higher values represent higher quality.
Echo threshold defines the minimum value required for an echo to be accepted as valid
and evaluated.
Echo Lock Window: a window centered on an echo in order to locate and display the echo's
position and true reading. Echoes outside the window are not immediately processed.
Echo Marker: a marker that points to the processed echo.
Echo Processing: the process by which the radar unit determines echoes.
Echo Strength: describes the strength of the selected echo in dB above 1 μV rms.
Echo Profile: a graphical display of a processed echo.
false echo: any echo which is not the echo from the desired target. Generally, false echoes are
created by vessel obstructions.
frequency: the number of periods occurring per unit time. Frequency may be stated in cycles
per second.
hertz (Hz): unit of frequency, one cycle per second. 1 Gigahertz (GHz) is equal to 10
inductance: the property of an electric circuit by virtue of which a varying current induces an
electromotive force in that circuit or in a neighboring circuit. The unit is a Henry.
Local Display Interface (LDI): the removable LCD display with push buttons
local user interface (LUI): view outputs via LCD display and make modifications using either
the display push buttons or the handheld programmer
multiple echoes: secondary echoes that appear as double, triple, or quadruple echoes in the
distance from the target echo.
Near Blanking: see Blanking
nozzle: a length of pipe mounted onto a vessel that supports the flange.
parameters: in programming, variables that are given constant values for specific purposes or
processes.
polarization: the property of a radiated electromagnetic wave describing the time-varying
direction and amplitude of the electric field vector.
pulse radar: a radar type that directly measures distance using short microwave pulses.
Distance is determined by the return transit time.
Page 150 SITRANS LR560 (FF) – INSTRUCTION MANUAL
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