Bc Functionality - Leica TPS 1000 Series Manual

CO
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PM
FS
SC
OC
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EG
CA
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BC
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The built-in Automatic Target Recognition ATR1
transmits a laser beam. The reflected light is received
by the built-in camera (CCD). The position of the
received light spot with respect to the centre of the CCD
is computed and the offsets are used to correct the
horizontal and vertical angles. The offsets are also used
to control the motors which turn the instrument so that
the crosshairs are centred on the prism.
In order to minimize the times for measuring, the
crosshair is not moved to the exact centre of the prism.
The offset can be up to 5mm.
Then the Automatic Target Recognition ATR1 measures
the offsets between the crosshair and prism centre and
corrects the Hz and V angles accordingly.
Therefore the Hz and V angles are measured to the
prism-centre, regardless of the crosshair pointing
precisely to the centre of the prism.
If the offset is more than 5mm when the prism is
exactly aligned and in faultless condition, the Automatic
Target Recognition ATR1 must be recalibrated. If
excessive offsets occur frequently, contact your Leica
agency.
Hz-offset
Crosshair
TPS-System 1000-2.3.1en
Centre of the prism
© Leica