Siemens SITRANS LR560 Operating Instructions Manual page 157

radar: radar is an acronym for RAdio Detection And Ranging. A device that radiates
electromagnetic waves and utilizes the reflection of such waves from distant objects to
determine their existence or position.
range: distance between a transmitter and a target.
range extension: the distance below the zero percent or empty point in a vessel.
repeatability: the closeness of agreement among repeated measurements of the same
variable under the same conditions.
shot: one transmit pulse or measurement.
TVT (time varying threshold): a time-varying curve that determines the threshold level above
which echoes are determined to be valid.
7ML19985LY01 SITRANS LR560 (FF) – INSTRUCTION MANUAL Page 151