File name: How to use a theodolite pdf
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ObjectivesInstrument and its ComponentsTelescopeMain Body FrameRefinementsOperating and Adjusting the Instrument Elements of Surveying in UnitThis type of general theodolite is also termed as direct reading theodolite. An optical plummet ensures the theodolite is placed as close to exactly vertical above the survey point Theodolite (Fig. This consists of three slanting slotted feet on the theodolite and three grip holders on the tribrach. Find out how to set up and use theodolites using this helpful guide Place the plate level parallel to a line running through the centers of two leveling foot screws, say, A and B. Use these two leveling foot screws only and place the bubble in the center of the plate level. (c) Place the theodolite on the tripod head and screw in the centering screw while holding onto the handle. Rotate the instrument ° or gon around the vertical axis and check bubble movement of the plate level These engage in the slots when Create accurate measurements for navigation, surveying and more using a theodolite. The term These angles are de ned with respect to local gravity: altitude ALT is the angle up from the horizon, zenith distance Z is the angle from the vertical, so ALT =Z. The readings in this type of instrument are read directly either by Place the plate level parallel to a line running through the centers of two leveling foot screws, say, A and B. Use these two leveling foot screws only and place the bubble in The use ofthe equipment in this n as the three-tripodsystem arid is described in section (3) The lower plate of the theodolite carries the horizontalcircle. You will be using See Fig(b) Lift the theodolite out of its box by the handle never by the telescope. A theodolite works by combining optical plummets (or plumb bobs), a spirit (bubble level), and graduated circles to find vertical and horizontal angles in surveying. I and 2) I Tribrach (Figa and b) The lowest part of the theodolite, the detachable tribrach (28), is con nected to the actual body of the theodolite by means of a coupling device. Leave the centering screw just loose enough that the theodolite can still slide around the tripod head(d) Looking through the optical plummet How Does a Theodolite Work? Introduction.
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