AT-G Series The Leader in Positioning Technology ... SPECIFICATIONS* AT-G1 AT-G2 AT-G3 of precision positioning equipment and offers the widest selec- TELESCOPE Length AUTOMATIC LEVELS Topcon is the worldwide leading developer and manufacturer 229 mm 229 mm 230 mm tion of innovative precision GPS systems, laser, optical surveying, machine control, GIS and agriculture products. Image erect erect erect Magnification 32 x 32 x 30 x Objective lens 45 mm 45 mm 40 mm Relative brightness 1.98 1.98 1.78 1°30’ Field of view 1°20’ 1°20’ Resolving power 2.5“ 2.5“ 3.0“ Minimum focus 1.0 m 1.0 m 0.5 m Stadia constant 0m 0m 0m Stadia ratio 100 100 100 8’ / 2 mm 8’ / 2 mm 8’ / 2 mm Without optical micrometer ±0.7 mm ±0.7 mm ±1.5 mm With optical micrometer ±0.4 mm ±1.0 mm CIRCULAR LEVEL Sensitivity AUTOMATIC LEVELING ±0.4 mm HORIZONTAL CIRCLE Diameter 90 mm 117 mm 117 mm Minimum division 10’ (0.1 g) 1° (1 g) 1° (1 g) 2.1 kg 1.8 kg 1.8 kg Surveying and engineering Automatic Levels WEIGHT Instrument ■ Waterproof sealed telescope * all technical changes are reserved by TOPCON, 02/2010 construction www.topcon.eu ■ Angular reading to 10 mins. ■ Dual speed focusing Your local authorised Topcon distributor is: grafi t-werbeagentur.de ■ Clampless fine adjustment T170EN - English - A Rapid instrument set-up Very fast instrument set-up is possible using a dome head tripod. The base plate is specially shaped for fixing on top of dome head tripods. Optional accesories Angular reading to 10 minutes (AT-G1) Diagonal eyepieces The model AT-G1 has a glass horizontal circle which is graduated By using the diagonal eyepiece in place of in 10 minute (10c) divisions and every degree (one grade) from the standard telescope eyepiece means 0° to 360° (0 g to 400 g). Readings are made possible through 1 that easier viewing is possible for low set- 5 a 25 x microscope, with only a slight shift of the eye, from the telescope eyepiece. The horizontal circle freely rotates for zero up positions or in confined spaces. 6 2 alignment. Illuminator-5 Provides light to the telescope reticle 3 when insufficient light is available, for 4 Rubber eyepiece cap example in tunnels or at night. Sighting through Topcon’s AT-G series is safe for anyone who wears spectacles. With their protective rubber eyepiece caps, scratches and abrasions are reduced or eliminated completely. Optical micrometer Get greater accuracy from AT-G series Rapid, stable automatic levelling auto levels using the optical micrometer. During a one kilometre double A time-proven magnetically damped compensator is incorporated levelling run, accuracy can be improved 1 Ergonomic Focus Adjustment 4 Rapid Levelling System for automatic levelling action. It is not affected by fine vibrations to ±0.4 mm. The optical micrometer 2 Lightweight, composite, dry-nitrogen charged body 5 Rubber Eyepiece Cap and has been proven to have very stable precision, thus speeding 6 Horizontal Circle reading to 10’ (AT-G1) attaches to front of objective lens with a counter weight attached to the eyepiece. 3 Fine Horizontal Adjustment up automatic levelling operations and producing accurate results. The exclusive Topcon automatic levelling system utilises four Centering platform special mylar ribbons for hanging the magnetic damper com- When used on top of a tripod the center- pensator. The compensator is therefore not influenced by the ing platform provides quick and simple magnetic field, as well as having superior resistance to cold, centering on reference points. Parallel heat and shock. shifts of 100 mm vertically and 30 mm laterally.