Topcon GPT-8000 Series, Инструкция по эксплуатации

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9 CHECK AND ADJUSTMENT
9-9
9.3.6 Checking / Adjusting the Laser Plummet (For Laser
Plummet type)
• Check
1) Turn on the laser plummet and coincide the center of the laser with a measuring point.
2) Rotate the instrument 180° or 200g around the vertical axis and check the measuring point.
If the laser is properly centered in the measuring point, adjustment is not required. Otherwise,
adjust in the following manner.
• Adjustment
1) Turn the adjustment screws with the
accessory hexagonal wrench to shift the
laser to the measuring point. However,
correct only one-half of the displacement
in this manner.
Adjustment
screws part is
located
Adjustment screws
(4 pcs)
1/2 of displacement
Measuring
point
Laser
2) Use the leveling screws and coincide the center of the laser and the point.
3) Rotate the instrument 180° or 200g around the vertical axis once more and check the point
and the laser. If the laser is coincided to the measuring point, then further adjustment is not
required. Otherwise, repeat the adjustment.
Note:
First, loosen the adjustment screw to move the laser. Then tighten the adjustment screw on the oppo-
site side by an equal amount which will leave the tension of the adjustment screws unchanged.
Revolve in the counterclockwise direction to loosen and in the clockwise direction to tighten, but
revolve as little as possible.
Laser beam
Top of view of the measuring point
Laser is moved lower right.
Laser is moved
upper right.
Laser is moved
lower left.
Adjustment screws
Laser is moved upper left.
Reference
The laser can be moved by turning the adjustment screws clockwise as follows.