Topcon GPT-2000, GPT-2003, GPT-2005, GPT-2006, GPT-2009 4 DISTANCE MEASUREMENT

4-1

4 DISTANCE MEASUREMENT

4 DISTANCE MEASUREMENT

●Prism mode and Non-prism mode

In GPT-2000 series, the distance measurement will be done using invisible pulse laser beam emitted

from pulse laser diode. You can select measurement mode between Prism mode which collimating a

prism and Non-prism mode that is collimating a target object except prism.

●Non-prism mode enables all distance measurements such Distance measurement, Coordinate

measurement, Offset measurement and Layout.

●To switch over Prism mode to Non-prism mode or contrary, press the [NP/P] soft key in each

measurement display. [NP] of Non-prism mode indicator will be shown at the right corner of the

display in Non-prism mode measurement.

Changing mode shall be done before measurement.

●It is possible to set Non-prism mode for distance measurement during the power on time. Refer to

16.SELECTING MODE to set the option.

●If happened collimating the near distance prism in Non-prism mode, measurement will not be done

because of too much light.

4.1 Setting of the Atmospheric Correction

When setting the atmospheric correction, obtain the correction value by measuring the temperature

and pressure. Refer to Section 12.2 “Setting of Atmospheric Correction Value”.

4.2 Setting of the Correction for Prism Constant / Non-prism Constant

Topcon’s prism constant value is 0. Set correction for prism at 0. If the prism is of another manuf acture,

the appropriate constant shall be set beforehand. Refer to Chapter 11 “SETTING THE PRISM / NON-

PRISM CONSTANT VALUE”. The setting value is kept in the memory even after power is off.

Note: Those distance shorter than 2.5m will not be displayed in Non-prism mode.

Note: Conﬁrm that Non-prism correction value is set at zero before measurement target such

as a wall in Non-prism mode.

Example

HR: 120°30'40"

HD* 65.432 m NP

VD: 12.345 m

MEAS MODE NP/P P1

↓

N: 120.456 m

E: 34.567 m NP

Z: 12.345 m

MEAS MODE NP/P P1

↓

Distance measurement mode Coordinate measurement mode

Non-prism

mode

indicator

To change the mode, press the [NP/P] soft key in each measurement.

Contents

Main Page Page General Handling Precautions Display for Safe Use WARNING Safety Cautions User Exceptions from Responsibility CAUTION CAUTION Symbol mark while the laser is emitting. 5 Safety Standard for Laser Beam Contents 9 MEMORY MANAGER MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1 Page Standard Set Composition 1-1 1 NOMENCLATURE AND FUNCTIONS 1-2 1.2 Display 1.3 Operating Key 1.4 Function Key (Soft Key) 1-5 Angle measurement Distance measurement mode Coordinate measurement mode 1-6 1.5 Serial signal RS-232C connector N, E, Z, HR (or V,H,SD,N,E,Z) 2-1 2 PREPARATION FOR MEASUREMENT 2.1 Power Connection (unnecessary if on-board Ni-MH battery BT-52QA is used) 2-2 2.2 Setting Instrument Up For Measurement Reference: Leveling and Centering the Instrument 2.3 Power Switch Key ON 2-4 2.4 Battery Power Remaining Display V : 9010'20" HR: 000'00" 0SET HOLD HSET P1 2.5 Vertical and Horizontal Angle Tilt Correction Page 2.6 How to Enter Alphanumeric characters 2.7 Point Guide (Only for Point Guide type) 2.8 Laser Plummet ON/OFF (Only for Laser Plummet type) 3 ANGLE MEASUREMENT 3.1 Measuring Horizontal Angle Right and Vertical Angle 3.2 Switching Horizontal Angle Right/Left 3.3 Measuring from the Required Horizontal Angle 3.4 Vertical Angle Percent Grade(%) Mode 3.5 Repetition Angle Measurement 3.6 Buzzer Sounding for Horizontal Angle 90 Increments 3.7 Compasses ( vertical angle) 4 DISTANCE MEASUREMENT 4.1 Setting of the Atmospheric Correction 4.2 Setting of the Correction for Prism Constant / Non-prism Constant 4.3 Distance Measurement (Continuous Measurement) 4.4 Distance Measurement (N-time Measurement/Single Measurement) 4.5 Fine Mode/Tracking Mode/Coarse Mode 4.6 Stake Out (S.O) 4.7 Offset Measurement Page Page Page Page Page Page Page Page 5 COORDINATE MEASUREMENT 5.1 Setting Coordinate Values of Occupied Point e E N 5.2 Setting Height of the Instrument 5.3 Setting Height of Target (Prism Height) 5.4 Execution of Coordinate Measuring 6 SPECIAL MODE (Menu Mode) 6.1 Application Measurement (PROGRAMS) Page Page Page Page Page Page Page Page Page Page Page Page Page 6.2 Setting the GRID FACTOR 6.3 Setting Illumination of Display and Cross Hairs 6.4 Setting Mode 1 Page Page 6.5 Setting Contrast of Display 7-1 7DATA COLLECTION Page 7.1 Preparation Page Page Page 7.2 Operational Procedure of DATA COLLECT Page Page 7.3 Data Collect Offset Measurement mode Page A Page Page Page Page 7.4 NEZ Auto Calculation 7.5 Editing PCODE Library [PCODE INPUT] 7.6 Setting Parameter of Data Collect [CONFIG.] 8-1 8LAYOUT Page 8.1 Preparation Page Page Page Page Page 8.2 Executing a Layout Page 8.3 Setting a New Point Page Page Page Page Page 9 MEMORY MANAGER MODE 9.1 Display Internal Memory Status 9.2 Searching Data Page Page Page 9.3 FILE MAINTENANCE * Page Page 9.4 Coordinate Data Direct Key Input 9.5 Delete a Coordinate Data from a File 9.6 Editing PCODE Library 9.7 Data Communications Page Page 9.8 Initialization 10 SET AUDIO MODE 11 SETTING THE PRISM / NON-PRISM CONSTANT VALUE 12 SETTING ATMOSPHERIC CORRECTION 12.1 Calculation of Atmospheric Correction 12.2 Setting of Atmospheric Correction Value Page 12-3 Page Page 13-1 13 CORRECTION FOR REFRACTION AND EARTH CURVATURE 14 POWER SOURCE AND CHARGING 14.1 On-board Battery BT-52QA 14-2 15-1 15 DETACH/ATTACH OF TRIBRACH 16-1 16 SELECTING MODE DISTANCE MEAS. 16.1 Items of the Selecting Mode 16-2 16.2 How to Set Selecting Mode Page 17-1 17 CHECK AND ADJUSTMENT 17.1 Checking and adjusting of instrument constant 17.1.1Checking of the accuracy of the non-prism mode 17.2 Checking the Optical Axis 17-3 17-4 17.3 Checking/Adjusting the Theodolite Functions 17-5 17.3.1Checking /Adjusting the Plate Level 17.3.2Checking /Adjusting the Circular Level 17-6 17.3.3Adjustment of the Vertical Cross-hair 17-7 17.3.4Collimation of the Instrument 17-8 17.3.5Checking / Adjusting the Optical Plummet Telescope 17-9 17.3.6Checking / Adjusting the Laser Plummet (For Laser Plummet type) Cap Page 17.4 How to Set the Instrument Constant Value 17.5 Adjustment of Compensation Systematic Error of Instrument Page 18-1 18 PRECAUTIONS 19-1 19 SPECIAL ACCESSORIES 19-2 Page 20-1 20 BATTERY SYSTEM 21-1 21 PRISM SYSTEM Single prism Tilting triple prism holder-1 22-1 22 ERROR DISPLAYS 22-2 23-1 23 SPECIFICATIONS 23-2 23-3 APPENDIX-1 APPENDIX 3 Dual Axis Compensation APPENDIX-2 APPENDIX-3 4 Precaution when Charging or Storing Batteries Page Page Page Page TOPCON CORPORATION PULSE TOTAL STA TION GPT -2000 64531 90170 GPT-2000 0107 (2B)