Glossary
accuracy: degree of conformity of a measure to a standard or a true value.
agitator: mechanical apparatus for mixing or aerating. A device for creating turbulence.
algorithm: a prescribed set of
ambient temperature: the temperature of the surrounding air that comes in contact with the enclosure of the device.
antenna: an aerial which sends out and receives a signal in a specific direction. There are four basic types of antenna in radar level measurement, horn, parabolic, rod, and waveguide.
attenuation: 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.
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beam angle: the angle diametrically subtended by the
beam spreading: the divergence of a beam as it travels through a medium.
blanking: see Near Range.
capacitance: 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.
confidence: describes the quality of an echo. HIgher values represent higher quality. Confidence threshold defines the minimum value.
damping: 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.
dB (decibel): a unit used to measure the amplitude of signals.
derating: to decrease a rating suitable for normal conditions according to guidelines specified for different conditions.
dielectric: a nonconductor of direct electric current.1
1.Many conductive liquids/electrolytes exhibit dielectric properties; the relative dielectric constant of water is 80.
7ML19985JM01 | SITRANS LR 460 – INSTRUCTION MANUAL | Page 107 |
