LEICA TPS1200 - Manual (Page 111)

Check & Adjust TPS1200 111
4. Align the instrument crosshairs to the centre of the target plate, and then
inspect the position of the red laser dot on the target plate.
)
Generally speaking the red dot cannot be seen through the tele-
scope, so look at the target plate from just above the telescope
or from just to the side of it.
5. If the dot illuminates the cross on the plate, the achievable adjustment
precision has been reached; if it lies outside the limits of the cross, the
direction of the beam needs to be adjusted. Refer to paragraph "Adjusting
the direction of the beam step-by-step".
)
If the dot on the more reflective side of the plate is too bright and
dazzling, use the white side instead to carry out the inspection.
Step Description