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Nikon® 502 Series Total Stations
These precision instruments feature a Lumi-Guide tracking light above the objective lens that emits one steady and one blinking beam of coherent red light to help boost user efficiency. This light allows the rodman to locate the correct line quickly, assists in one-man clearing of lines, and works as a prism illuminator for night surveying. In addition, Quick Code keys help speed up data input. Assign frequently used functions to the two USR keys. You can define up to 10 one-touch Quick Codes in order to measure and record a point with the assigned code at the press of a key. Quality Nikon optics provide bright, clear images. For more powerful data collection capabilities, connect the total station to a handheld computer ( sold separately) . Meets IPX4 specifications.

Specifications
Telescope: Length, DTM-522, 158 mm; NPL-522, 153 mm. Magnification, DTM-522, 33x; NPL-522, 26x. Image, erect; Resolving Power, DTM-522, 2.5� ; NPL-522, 3� ; Field of View, DTM-522, 1° 20' ( 2.3 ft. at 100 ft.; 2.3 m at 100 m) ; NPL-522, 1° 30' ( 2.6 ft. at 100 ft.; 2.6 m at 100m) ; Minimum Focus, DTM-522, 4.26 ft. ( 1.3m) , NPL-522, 5.3 ft. ( 1.6 m) . Angle Measurement: Display Resolution ( selectable) , 1/ 5/ 10� , 0.2/ 1/ 2 mgon, 0.005/ 0.02/ 0.05 mil; Accuracy ( DIN 18723) , 3� ( 1 mgon) . Distance Measuring Range: Good conditions - no haze with visibility over 25 miles ( 40 km) : With reflector sheet, DTM-522, 16.4 to 328.1 ft. ( 5 to 100 m) ; NPL-522, 5.3 to 980 ft. ( 1.6 to 300 m) ; With mini prism, DTM-522, 3, 600 ft. ( 1, 100 m) ; NPL-522, 5.3 to 9, 800 ft. ( 1.6 to 3, 000 m) ; With single prism, DTM-522, 8, 900 ft. ( 2, 700 m) ; NPL-522, 5.3 to 16, 400 ft. ( 1.6 m to 5, 000 m) ; With triple prism, DTM-522, 11, 800 ft. ( 3, 600 m) ; With nine prisms, DTM-522, 14, 400 ft. ( 4, 400 m) . Normal conditions - ordinary haze with visibility about 12.5 miles ( 20 km) : With reflector sheet, DTM-522, 16.4 to 328.1 ft. ( 5 to 100 m) , NPL-522, 5.3 to 980 ft. ( 1.6 to 300 m) ; With mini prism, DTM-522, 3, 100 ft. ( 950 m) ; NPL-522, 5.3 to 9, 800 ft. ( 1.6 to 3, 000 m) ; With single prism, DTM-522, 7, 900 ft. ( 2, 400 m) ; NPL-522, 5.3 to 16, 400 ft. ( 1.6 to 5, 000 m) ; With triple prism, DTM-522, 10, 200 ft. ( 3, 100 m) . Reflectorless mode ( White target) , NPL-522, 5.3 to 680 ft. ( 1.6 to 210 m) . Measuring Interval: Prism/ Precise Mode, DTM-522, 1.0 sec. ( initial 1.0 sec.) ; NPL-522, 1.3 sec. ( initial 2.0 sec.) ; Prism/ Normal Mode, DTM-522, 0.5 sec. ( initial 1.0 sec.) , NPL-522, 0.5 sec. ( initial 1.6 sec.) ; Reflectorless/ Precise Mode, NPL-522, 1.6 sec. ( initial 2.6 sec.) ; Reflectorless/ Normal Mode, NPL-522, 0.8 sec. ( initial 2.0 sec.) .