Siemens Sitrans Probe LU Instruction Manual page 122

Oxley Creek WWTP Water Reclamation
(Probe LU Manual) Vendor Manual
: to decrease a rating suitable for normal conditions according to guidelines specified
for different conditions.
a nonconductor of direct electric current.
a signal that has been reflected with sufficient magnitude and delay to be perceived in
some manner as a signal distinct from that directly transmitted. Echoes are frequently
measured in decibels relative to the directly transmitted signal.
position and true reading. Echoes outside the window are not immediately processed.
a marker that points to the processed echo.
describes the strength of the selected echo in dB above 1 µV rms.
a graphical display of a processed echo.
the control systems in which they occur.
any echo which is not the echo from the desired target. Generally, false echoes are
created by vessel obstructions.
the software embedded in the device
the number of periods occurring per unit time. Frequency may be stated in cycles
per second.
unit of frequency, one cycle per second. 1 kilohertz (kHz) is equal to 10
ighway ddressable emote ransducer. An open communication protocol used to
address field instruments.
i 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.
distance from the target echo.
Page 116 SITRANS Probe LU (PROFIBUS PA) – INSTRUCTION MANUAL
the recognition of the validity of the echo. A measure of echo reliability.
a window centered on an echo in order to locate and display the echo's
the process by which the radar unit determines echoes.
unwanted electrical signals that produce undesirable effects in the circuits of
secondary echoes that appear as double, triple, or quadruple echoes in the
Doc Id: VM11
Active Date: 15/12/2006
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Hz.
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