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23 SPECIFICATIONS
23-2
Least Count in Measurement
Fine measurement mode : 1mm (0.005ft.) / 0.2mm (0.001ft.)
Coarse measurement mode : 10mm (0.02ft.) / 1mm (0.005ft.)
Tracking measurement mode : 10mm (0.02ft.)
Measurement Display : 12 digits : max. display 99999999.9999
Measurement Time
Fine measurement mode : 1mm : Approx. 1.2sec. (Initial 3 sec.)
0.2mm : Approx. 3 sec. (Initial 4 sec.)
Coarse measurement mode : Approx. 0.5sec. (Initial 2.5 sec.)
Tracking measurement mode : Approx. 0.3sec. (Initial 2.5 sec.)
(The initial time will be different by a condition and
setting EDM off time. )
Atmospheric Correction Range : –999.9 ppm to +999.9 ppm, in 0.1 ppm increments
Prism Constant Correction Range : –99.9 mm to +99.9 mm, in 0.1 mm increments
Coefficient Factor : Meter / Feet
International feet 1meter = 3.2808398501 ft.
US SURVEY feet 1meter = 3.2808333333 ft.
Electronic Angle Measurement
Method : Absolute reading
Detecting system
Horizontal angle
GPT-2003/2005 : 2 sides
GPT-2006/2009 : 1 side
Vertical angle : 1 side
Minimum reading
GPT-2003/2005/2006 : 5" / 1" (1mgon / 0.2mgon) reading
GPT-2009 : 10" / 5" (2mgon / 1mgon) reading
Accuracy (Standard deviation based on DIN 18723 )
GPT-2003 : 3"(1mgon )
GPT-2005 : 5"(1.5mgon )
GPT-2006 : 6"(1.8mgon )
GPT-2009 : 9"(2.7mgon )
Measuring time : Less than 0.3 sec.
Diameter of circle : 71mm
Tilt Correction (Automatic index)
Tilt sensor
GPT-2003/2005/2006 : Automatic vertical and horizontal compensator
GPT-2009 : Automatic vertical compensator
Method : Liquid type
Compensating Range : ±3'
Correction unit : 1" (0.1mgon)
Others
Instrument height : 176mm (6.93in) Base unit detachable
(Height from the tribrach dish to the center of
telescope)
Level sensitivity
Circular level : 10'/2mm
Plate level
GPT-2003/2005 : 30"/2 mm
GPT-2006/2009 : 40"/2 mm
Optical Plummet Telescope
Magnification : 3×
Focusing range : 0.5m to infinity
Image : Erect
Field of view : 5°(ø114mm/1.3m)