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4. Preparations before measurements
4.1 Unpacking and storing instruments
Unpacking
Lay down the box gently with the top side facing up. Open the
lock and take out the instrument.
Storage
Cover the telescope cover. Make sure that the vertical clamping
screw and the level bubble face upwards. Lay down the instrument
into the box (with objective lens of the telescope facing downwards.).
Tighten the vertical clamping screw gently, then Lock the box.
4.2 Set up the instrument
Reference for operation:
Install the instrument onto the tripod gently, then level and
center the instrument to ensure the accuracy of the measurement
result.
4.2.1 Using plummets to center and level (align)
1)
Set up the tripod
①
Position tripod legs so that the plummet is aimed to the
ground mark point. Turn the focusing ring of the
optical plummet to focus;
②
Make sure that the center of the tripod top is right
above the station;
③
Stamp the tripod on the ground with your feet.
2)
Install the instrument onto the tripod
Mount the instrument on the tripod head. Support it with
one hand, and tighten the centering screw on the bottom of
the unit to make sure it is secured to the tripod.
3)
Using the circular level to level the instrument coarsely
①
Twist and adjust the two leveling screw A and B on the
bottom of the instrument until the bubbles of the
circular level moves to the line perpendicular to the
center line the screw A and B;
②
Twist and adjust leveling screw C to move the bubble
to the center of the circular level.
