Topcon Marine Instruments GPT-2000 Manuel D’Utilisation

   6 SPECIAL MODE (Menu Mode)

6-14

This mode is used to obtain the coordinate data with the origin  point  A(0,0,0) and the line AB as N 
axis. 
Place the 2 prisms at the points A and B on the line, and place the instrument at unknown point C. After 
measuring the 2 prisms , the coordinate data and the direction angle of the instrument will be calculated 
and restored.

After pressing the [MENU] key, press the [F4](P

↓

) 

key to get the menu on page 2/3.

[MENU]

[F4]

Press the [F1] key.

[F1]

Press the [F4](P

↓

) key to get the PROGRAMS 

menu on page 2/2.

[F4]

Press the [F2] key.

[F2]

Press the [F1](INPUT) key and enter instrument  
height.

[F1]

Enter 

INS.HT

[F4]

Press the [F1](INPUT) key and enter reflector 
A(P1) height.

[F1]

Enter R.HT

[F4]

P(n, e, z)

Prism P2

Line

Instrument Point (Unknown point)

INS.HT

Prism P1

R.HT

  

↓

  

↓

  

↓