Topcon GPT-2005 Manuel D’Utilisation

   17 CHECK AND ADJUSTMENT

17-2

To check if the optical axis of EDM and theodolite are matched, follow the procedure below. It is 
especially important to check after adjustment of the eyepiece reticle is carried out.
1) Position a prism about more than 150m apart from GPT-2000 series .
2) After the power switch ON, collimate the center of the prism by prism mode.
3) Press the [F4] key to get the soft key page 2 in the 

distance measurement mode or page 3  in the 
coordinate measurement.

4) Press the [F3](S/A). 

Buzzer sounds continuously.

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5) Turn the horizon taltangent screw, move the collimating point to the left side of prism gradually until 

buzzer sound stops.

6) Turn the horizontal tangent screw slowly, and  move the collimating point to the prism center 

gradually until at the position buzzer starts.
Confirm the level of the signal (light quantity level) in display to adjust at the level of one to two as 
shown in below by turning the horizontal tangent screw.

7) Press the [ESC] key and measure the horizontal angle, and note the horizontal angle displayed. Or 

you can do 0-set of horizontal angle.

8) Return to the Set Audio mode again.
9) Turn the horizon taltangent screw, move the collimating point to the right side of prism gradually 

until buzzer sound stops.

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↓

  

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Prism

Reticle

Prism

Reticle

  

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Quantity level two

Prism

Reticle