Setting up theodolite pdf

Working of vernier theodolite to measure horizontal and. Make sure the height of the tripod allows the instrument the theodolite to be eyelevel. Set up the theodolite over the peg o and level it accurately. Adjustment of a theodolite, surveying and levelling. File type pdf wild t theodolite manual engineering level a brief how to video on setting up a level and rod. Plumb bob method i setting up the tripod this is the most important operation. Edm and electronic theodolite edm and electronic theodolite 33. A plumbbob or optical device is used to position the theodolite directly above the station pin. Theodolites how does a theodolite work theodolite vs. Adjustment of a theodolite the adjustments of a theodolite are of two kinds permanent adjustment.

Wild t2 mod user manualdescribsion beschreibung wild heerbrugg ag wild t2 mod theodolite user manual. In 1571, leonard digges came up with a device which more closely resembled an early theodolite and called it theodolitus. Study the contract plans, special provisions, standard plans, standard specifications, the plan quantities, construction manual, and. When the desired relationship between fundamental lines is disturbed. Rotate the instrument 90 degrees and level using the 3rd leveling screw. Here in we have gathered some pdf lectures on surveying. Working of a vernier theodolite starts with setting up and adjustment of theodolite for the measurement of angles. Following are the adjustment required for theodolite before using it. Theodolite survey application in height and distance measurements. Permanent adjustment of transit theodolite, methods of repetitions and reiterations. Now, and only now, place the instrument on the tripod and secure it with the central fixing screw. Extend the legs of the tripod as far as is required and tighten the screws firmly.

The regular movie mode is similar to the photo mode in theodolite, recording a basic video with options to show an overlay with crosshairs, geodata, and a custom note. If the tripod is not set properly, a great deal of time will have to spent on subsequent operations 2 to 4. It is a basic course for all universities for civil engineers. A theodolite needs two people to measure and align the angles. The total station is an electronic theodolite integrated with an electronic distance meter edm to read distances from the instrument to a particular spatial entity.

Doc introduction to theodolite farhan qasim academia. Measure the height between the ground and the instrument. We hope students all over the world will find it helpful. Measurement of horizontal angle measurement of angle abc the instrument is set over b. Surveying instruments operators manual dt240 dt540 dt740 dt940 dt540l dt740l dt940l digital theodolite class 2 laser product. Topcon dt200 series instruction manual pdf download. Ltd is basis of the etdt series electronic theodolite by adding laser system to the telescope. This point is the basis for measuring angles and distances. It was a divided circle and square with a compass in the center, according to brief history of turning angles at noaa. Digital theodolite the important features of total station are.

The circuiar holder with the horizontal circle is located outside on the axis sleeve. Mark the point at which the theodolite will be set up with a surveyors nail or a stake. The lower clamp is kept fixed and upper clamp is loosened. Displays the values of distance, angle, height and the coordinates of the observed point, where the reflector target is kept. Level the theodolite by adjusting the tripod legs and using the bullseye level. An ets is an electronic instrument used in modern surveying. Center the bubble using the leveling screws the bubble moves toward the screw that is turned clockwise. Adjustment of the theodolite temporary adjustment setting up the theodolite 16.

This video will give you a very basic idea of the process, but there. Able to connect with electronic controller able to connect with most of the electronic controllers on the market to complete field data collection. Theodolite surveying theodolite the theodolite is a most accurate surveying instrument mainly used for. How to establish a levelgrade line for landscaping this old house duration. The tripod legs are spread out and rested lightly on the. Centre the telescope bubble with the tilting screw for each staff reading. Chapter 15 construction survey procedures 1501 general in performing construction surveying, preparation is a major part of the operation.

In order to make accurate and precise measurements using a total station or theodolite, the instrument must be set up properly. It is the axis of rotation of the telescope in the vertical plane. Set up the tripod where you have a clear sight of the benchmark, at a similar height to but preferably higher, than the benchmark. Control all the functions are controlled by operating key board. You will be using a universal theodolite, model wild t2, for these measurements. Loosen the horizontal clamp and turn instrument until plate level is parallel to 2 of the leveling foot screws. If possible, set up in the centre of the area that you intend to survey, or somewhere that you can see all of the site as well as the backsightbench mark, with the top plate relatively level. Total station setup and operation university of south. Write up the lab in your field book, refer to the following example. The permanent adjustment are made to establish the fixed relationships between the fundamental lines of the instrument, and once made, they last for long time. The art of setting up a theodolite over a station measurements and errors 3. Mount the theodolite by placing it atop the tripod, and screw it in place with the mounting knob.

Setting out grades ranging curves tacheometric survey 4. Wild t2 universal theodolite, the bestknown singlesecond instrument in the world. With the upper clamp closed, and the compass released unscrew its. Surveying is a very important part of civil engineering. The art of setting up a theodolite over a station theodolite there should be the following controls silver knobs. The angle of each axis can be measured with fairly accurate precision as long as the operator knows how to use the theodolite and knows basic trigonometry. For historical reasons, the side of the theodolite where the horizontal and vertical adjusters are positioned is known as the face of. Set up the tripod so that the tripod plate is as horizontal as possible and the legs of the tripod are firm in the ground.

Some models include internal electronic data storage to record surveyed points xnorthing. Procedure of theodolite methods in setting out of stage. The setting of the theodolite over a station at the time of taking any observation is called temporary adjustment. The heights of some inaccessible objects such as towers can. View and download topcon dt200 series instruction manual online. Setting up a total station and basics of operation duration. O is the station point fixed on the ground by a peg. A theodolite is basically a telescope with both a vertical and horizontal axis. Field book example please remember that you can use additional pages to clearly show all necessary information trial 20m 40m 60m 1 30 58 90 2 30 57 89 3 31 57 90 avg.