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        1. SIMAI SURVEYING INSTRUMENT
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          Reflectorless Total Station DTM-622R

          Distance measurement

          Max distance (in good weather)

          Singles prism

          3.0Km

          Three prisms

          5.0Km

          No-prism

          400m

          Digital display

          Max:99999999.9999 m,Min.: 0.1mm

          Precision

          No-prism5+3ppm,have-prism?2+2ppm

          Unit

          m/ft for selection

          Time for measuring

          Single fine measurement 2 sec. tracking 0.8 sec

          Number of measurements

          1~ 99

          Meteorologic correction

          Automatic correction of input parameter

          Atmospheric refraction and earth curvature correction

          Automatic correction of input parameter, K=0.14

          Prism constant correction

          Automatic correction of input parameter

          Angle measurement

          Angle measurement method

          Absolute code

          Grating disc dia. (horizontal, vertical)

          79mm

          Min. reading displayed

          1″

          Detection method

          Horizontal circle: 2 sides?
          Vertical circle: 2 sides

          Precision

          2″

          Telescope

          Imaging

          Right reading

          Barrel length

          170mm

          Objective lens ?effective aperture

          48mm

          Magnification

          30x

          Viewing angle

          1°30′

          Resolution

          3.5″

          Min. focus distance

          1.5m

          Automatic vertical compensator

          System

          Single axis, double axis liquid electronic sensor compensation

          Work range

          ±3′

          Precision

          ±3 ″

          Level

          Plate level

          20″/2mm, 30″/2mm

          Circular level

          8′/2mm

          Optical plummet

          Imaging

          Right reading

          Magnification

          Focusing range

          0.5m~∝

          Viewing angle

          Display

          Type

          Two sides, graphically

          Data transmission

          Interface

          RS-232C

          Battery

          Power supply

          Rechargeable Ni-MH battery, rechargeable lithium battery

          Volt.

          Lithium battery: DC7.6V; Ni-MH battery: DC7.2V

          Continuous operation time

          8hours

          Size and weight

          Size

          174×207×383mm

          Weight

          6.8kg




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