Least count of total station

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• About us • Sokkia-Leica-Surveying-Instruments • Electronic Total Station • Automatic Optical Level • Repair and Calibration • Survey Accessories • ROBUST – Aluminum Tripod, Asi-al 01 • GR 500 Professional BOSCH for Survey • Batteries • Battery Chargers • Robust RTK DGPS (GNSS) • Robust Receiver for Global Navigation Satellite System (GNSS) • Robust Controller for Global Navigation Satellite System (GNSS) • Robust RTK DGPS E600-H E-SURVEY • P8II_Datasheet-5” Rugged Android Handheld • Robust RTK DGPS E800 E-SURVEY • Total Station • ROBUST Windows CE7 ETS-390 Series Total Station • ETS-100 WinCE Total Stations • ROBUST Windows CE7 RTS 101 Total Station • ETS-551R10 & ETS-552R10 Total Stations • TOTAL STATION Android RQS • Total Station ETS-340 Series • Robust ETS 362R Series Total Station • Electronic Theodolite • ROBUST Digital Theodolite Sanding Make, Et – 202 L Laser Plummet • ROBUST Digital Theodolite ET-202 • JT01-1 Micro Optical Theodolite • Automatic Level • Automatic Level NL 32G • Robust DS05 Built-in parallel-plate micrometer • ROBUST-RL SERIES Digital Level • Robust Digital Level DAL 32 • DIGITAL AUTOMATIC LEVEL DAL32TGD • Lab Items • Lab Items : Concrete / Soil / Laboratory Type • Wheelbarrows-IS 2431 • Liquid Limit Device (Motorized) • Rapid Moisture Meter • DLC Vibrating Hammer • Penetrometer • Digital Hot Air Oven • Anti Vibration Table • Traffic Cone • Air Entrainment Meter – Model : ASI-AEM • Contact • Cart 0 • Cart • Search REFLECTOR LESS TOTAL STATION ETS...

Contents: • • • • • • • • • • What is a Total Station? Total station is a Capability of a Total Station Microprocessor unit in total station processes the data collected to compute: • Average of multiple angles measured. • Average of multiple distance measured. • Horizontal distance. • Distance between any two points. • Elevation of objects and • All the three coordinates of the observed points. Data collected and processed in a Total Station can be downloaded to computers for further processing. Total station is a compact instrument and weighs 50 to 55 N. A person can easily carry it to the field. Total stations with different accuracy, in angle measurement and different range of measurements are available in the market. Figure below shows one such instrument manufactured by SOKKIA Co. Ltd. Tokyo, Japan. Fig: Parts of total station Important Operations of Total Station Distance Measurement Electronic distance measuring (EDM) instrument is a major part of total station. Its range varies from 2.8 km to 4.2 km. The accuracy of measurement varies from 5 mm to 10 mm per km measurement. They are used with automatic target recognizer. The distance measured is always sloping distance from instrument to the object. Angle Measurements The electronic Data Processing This instrument is provided with an inbuilt microprocessor. The microprocessor averages multiple observations. With the help of slope distance and vertical and horizontal angles measured, when height of axis of instrumen...

Fundraiser Fundraiser Forum Surveying & Related Member Introductions Surveying & Geomatics Software, CAD & Mapping GNSS & Geodesy Photogrammetry, LiDAR & UAS Business, Finance & Legal Education & Training Rest In Peace Ask A Surveyor Marketplace For Sale Want to Buy Surveying Jobs Lost & Stolen Equipment Hi guys I'm going to be buying a robotic total station soon (second hand) and I'm not sure if to get 1", 3" or 5". I mainly do smallish surveys - sites not much bigger than 100m x 100m and setting out jobs on construction sites. How accurate is your gun and what level of accuracy do you think I need for this type of work? Kind regards, Andrew Well, think of angular precision this way. 5" X 100m X 0.000 004 85 = +/- 2mm perpendicular to line of sight. But you don't get 5 second precision until you've turned two direct and reverse sets. For one bs and one fs (I.e. not double centering) a 5 second station is only precise to 10" under ideal conditions (and neglecting centering and leveling errors etc.) which equals +/- 5mm perpendicular to line of sight. In order to get 1" results from a 1" gun you are going to need top, top quality tripods, tribrachs, and glass maintained in top, top condition. Even then you will see results only when the environmental conditions are just right. For 99.9% of work most of us do 1" is overkill. I really doubt that you want or need a 1" gun. And there usually isn't a lot of cost difference between a 3" gun and a 5". So the 3" seems to be the swe...