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Leica TPS700 Series Field Manual - Surveying Equipment

Leica TPS700 Series Field Manual - Surveying Equipment

Leica TPS700 Series Field Manual - Surveying Equipment

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FunctionalityThe built-in Automatic TargetRecognition ATR transmits alaser beam. The reflected light isreceived by the built-in camera(CCD). The position of thereceived light spot with respect tothe centre of the CCD iscomputed and the offsets areused to correct the horizontal andvertical angles. The offsets arealso used to control the motorswhich turn the instrument so thatthe crosshairs are centred on theprism.In order to minimize the times formeasuring, the crosshair is notmoved to the exact centre of theprism. The offset can be up to5mm.Then the Automatic TargetRecognition ATR measures theoffsets between the crosshair andprism centre and corrects the Hzand V angles accordingly.Therefore the Hz and V anglesare measured to the prism-centre,regardless of the crosshairpointing precisely to the centre ofthe prism.V-offsetHz-offsetCentre ofthe prismCrosshairTC700Z10421

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