Glossary - Siemens Sitrans Probe LU Instruction Manual

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(Probe LU Manual) Vendor Manual

Glossary

Note:
Parameter names are capitalized.
any undesired audible sound.
degree of conformity of a measure to a standard or a true value.
mechanical apparatus for mixing or aerating. A device for creating turbulence.
a prescribed set of well-defined rules or processes for the solution of a problem in a
finite number of steps.
enclosure of the device.
a term used to denote a decrease in signal magnitude in transmission from one
point to another. Attenuation may be expressed as a scalar ratio of the input magnitude to
the output magnitude or in decibels.
reading of false echoes. (See TVT.)
This is used in conjunction with auto false echo suppression.
the angle diametrically subtended by the one-half power limits (-3 dB) of the
sound beam.
the distance in front of the transducer face where level measurement is not possible.
the property of a system of conductors and dielectrics that permits the storage of
electricity when potential differences exist between the conductors. Its value is
expressed as the ratio of a quantity of electricity to a potential difference, and the unit is a
Farad.
describes the quality of an echo. Higher values represent higher quality.
Confidence threshold defines the minimum value.
term applied to the performance of an instrument to denote the manner in which the
measurement settles to its steady indication after a change in the value of the level.
a unit used to measure the amplitude of signals.
7ML19985JB02
the temperature of the surrounding air that comes in contact with the
a technique used to adjust the level of a TVT curve to avoid the
the divergence of a beam as it travels through a medium.
SITRANS Probe LU (PROFIBUS PA) – INSTRUCTION MANUAL
defines the endpoint of the TVT distance. (See TVT.)
Doc Id: VM11
Active Date: 15/12/2006
Page 115