Model

GM-52

GM-55

Telescope

Magnification / Resolving power

30x / 2.5″

Others

Length : 171mm (6.7in.) ,
Objective aperture : 45mm (1.8in.) (48mm (1.9in.) for EDM),
Image : Erect, Field of view: 1°30′ (26m/1,000m),
Minimum focus: 1.3m (4.3ft.) Reticle illumination : 5 brightness levels

Angle Measurement

Minimum Display

1”/5” (0.0002 / 0.001gon, 0.005 / 0.02mil)

Accuracy (ISO 17123-3:2001)

2″

5″

Dual-axis compensator /

Dual-axis liquid tilt sensor, working range: ±6′

Collimation compensation

On/Off (selectable)

Distance Measurement

Laser output

Reflectorless mode : Class 3R / Prism/sheet mode : Class 1

Measuring Range
(under average
conditions)

Reflectorless

0.3 to 500m (1,640ft.)

Reflective Sheet

RS90N-K : 1.3 to 500m (4.3 to 1,640ft.) ,
RS50N-K : 1.3 to 300m (4.3 to 980ft.) ,
RS10N-K : 1.3 to 100m (4.3 to 320ft.)

Mini prism

1.3 to 500m (4.3 to 1,640ft.)

One prism

1.3 to 4,000m (4.3 to 13,320ft)

Minimum
Display

Fine / Coarse : 0.0001m (0.001ft. / 1/8 in.) /
0.001m (0.005ft. / 1/8 in.) (selectable)
Coarse : 0.001m (0.005ft. / 1/8 in.) / 0.01m (0.02ft. / 1 in.)
(selectable) Tracking / Road : 0.01m (0.02ft. / 1 in.)

Accuracy
(ISO 17123-4 : 2001)
(D=measuring
distance in mm)

Reflectorless

(2 + 2ppm x D) mm*6

Reflective Sheet

(2 + 2ppm x D) mm

Prism*7

(1.5 + 2ppm x D) mm

Measuring Time

Fine

0.9s (initial 1.5s)

Coarse

0.6s (initial 1.3s)

Tracking

0.4s (initial 1.3s)

OS, Interface and Data Management

Operating System

Linux

Display /
Keyboard

Graphic LCD, 192 x 80 dots, backlight : on/off (Selectable) /
Alphanumeric keyboard / 28 keys with backlight

Control Panel Location

On both faces

On single face

Data Storage

Internal memory

Approx. 50,000 points

Plug – in
memory device

USB flash memory (max. 32GB)

Interface

Serial RS-232C, USB2.0 (Type A for USB flash memory)

General

Laser-pointer

Coaxial red laser using EDM beam

Levels

Graphic

6’ (Inner Circle)

Circular Level

(on tribrach)

10′ / 2mm

Plummet

Optical

Magnification: 3x, Minimum focus: 0.5m (19.7in.) from tribrach bottom

Laser (option)

Red laser diode (635 nm ± 10 nm),
Beam accuracy : <=1.0 mm @ 1.3m, Class 2 laser product

Dust and Water Protection /
Operating Temperature

IP66 (IEC 60529:2001) / -20 to +60ºC (-4 to +140ºF)

Size with handle

183(W)x 181(D)x 348(H)mm
(On both faces)

183(W)x 174(D)x 348(H)mm
(On single face)

Instrument height

192.5mm from tribrach mounting surface

Weight with battery & tribrach

Approx. 5.1kg (11.3lb)

Power Supply

Battery

Li-ion rechargeable battery BDC46C

Operating time (20ºC)*9

Approx. 14hours*10

Application Program

On Board

• REM Measurement •3D Coordinate Measurement

• Resection •Stake Out •Topography Observation

• Offset Measurement •Missing Line Measurement

• Surface Area Calculation •Route Surveying •Point to Line