# Setting Up/Aligning the Measuring Tool

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Set up the tripod so that it is stable and secured against tipping over or slipping. Place the measuring tool onto the thread of the tripod via the tripod mount (13) and secure the measuring tool with the locking screw of the tripod.

Align the tripod roughly.

Over short distances, the measuring tool can be carried whilst mounted on the tripod. In order to avoid damage to the measuring tool, the tripod must be held vertically during transport and should not e.g. be carried lengthwise over the shoulder.

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Align the measuring tool using the levelling screws (12) so that the air bubble is positioned in the centre of the circular bubble vial (7).

Turn the first two levelling screws A and B to move the air bubble so that it is centred between the two levelling screws. Then turn the third levelling screw C until the air bubble is positioned in the centre of the circular bubble vial.

Any remaining deviation of the measuring tool from the horizontal plane following the balancing of the circular bubble vial is compensated for by the compensator.

While working, check regularly (e.g. by looking through the bubble vial mirror (3)) whether the air bubble is still in the centre of the circular bubble vial.

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If necessary, centre the measuring tool over a ground point. To do this, hang the plumb-bob (20) on the locking screw of the tripod. Align the measuring tool over the ground point either by moving the measuring tool on the tripod or by adjusting the tripod.

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Remove the protective cap from the lens (1).

Point the telescope at a bright object or hold a white sheet of paper in front of the lens (1). Turn the eyepiece (6) until the crosshairs appear sharp and deep black.

Point the telescope at the levelling rod, using the rough sight (2) if necessary. Turn the focusing knob (16) until the graduation field of the levelling rod can be seen sharply. Align the crosshairs exactly with the centre of the levelling rod by turning the horizontal drive screw (14).

When the telescope is correctly focused, the crosshairs and the image of the levelling rod must not move against each other when the eye is moved behind the eyepiece.