Because of its various uses, the theodolite is sometimes known as universal instrument. This is done by observing the known point via either the optical or laser plummet whilst turning the theodolite through 360degrees, ideally at 90degree intervals. Whenever a particular direction and horizontal distance is to be entered for the purpose of locating the point on the ground using a target, then the instrument displays the angle through which the theodolite has. Before making the first set up of the day, visually inspect the instrument for damage. How to set up a theodolite above a known point lssltd.
Spring 2016 field book university of colorado boulder. For example, to determine highway points, huge buildings escalating edges theodolites are used. Set up the theodolite sight the initial point and read the direction e. Note that we are measuring horizontal distance not slop distance tape should be leveled 3. Orientation method set job select set job select is press red button as i am doing below in the select job screen select new in screen below. Once the theodolite is set up as above a final check can be performed.
Levellingup the instrument after setting up the instrument, level it up approximately with the bullseye bubble. The telescope of the theodolite is then set at 100 degrees which is the reference 0 degree so that the target point is in the centre of the reticle of the telescope. Check the machined surfaces and the polished faces of the lenses and mirrors. Following the measurements to be described here, this will ultimately become a known azimuth from which all further measurements taken. Surveying instruments theodolites bright hub engineering. 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. Mount the instrument mont the instrument onto the tripod carefully, and fix it with the 5 retaing bolt of the tripod. It is a basic course for all universities for civil engineers.
Containers t0 t1a t16 t2 t3 t4 rdh rds rk1 tm10 tm0 gak1 di50 znl b3 accessories tripods technical data of wild theodolites. Surveying equipment, measurements and errors may 2005 3. There are variety of theodolite vernier, optic, electronic etc. Theodolite is an instrument used in surveying to measure horizontal and vertical angles. Theodolite parts and its functions for measurements in. Support centring screw it with one hand and insert and. In order to make accurate and precise measurements using a total station or theodolite, the instrument must be set up properly. Theodolite training for students at the university of.
Plumb bob method i setting up the tripod this is the most important operation. File type pdf wild t theodolite manual engineering level a brief how to video on setting up a level and rod. The art of setting up a theodolite over a station theodolite. Angles will be measured from this point, as will distances. The theodolite is a complex instrument used mainly for accurate measurement of horizontal and vertical angle up to 10 or 20 depending upon the least count of the instrument. If you are to use the theodolite a tape is needed but in the case of the total station a tape might not. In figure 44 the edm transmitter, reflector, theodolite, and target are each shown at their respective h. Leveling systems are fitted for accurate installation of theodolites. It is also used for leveling, indirect measure of distances and prolonging a line etc. This will check for errors in the optical plummet or the laser plummet or the setup of the theodolite. Trained customer support specialists are here to help. All information included in the theodolite was tested in the field to ensure that the manual is as accurate as possible.
Total station setup and operation university of south. Before making the first setup of the day, visually inspect the instrument for damage. My version includes general information, detailed explanations on how to set up and use a theodolite, and one method of properly collecting useful data appendix 1. Theodolite is a multifunction viewfinder that combines a compass, twoaxis inclinometer, rangefinder, gps, map, nav calculator, and geooverlay photomovie camera into one indispensable app. How to establish a levelgrade line for landscaping this old house duration. If the tripod is not set properly, a great deal of time will have to spent on subsequent operations 2 to 4. Chapter 3 surveying equipment, measurements and errors table of contents. A dumpy level, also known as an automatic level or builders level, is a tool designed to find the height of land masses. Set the backup offset hub as far back as possible staying inside of right of way. Set a second backup offset hub and lath for line and distance to centerline only, well beyond the original offset in fill sections. Wild t2 universal theodolite, the bestknown singlesecond instrument in the world. Theodolites how does a theodolite work theodolite vs. Before measuring these angles, temporary and permanent adjustment of theodolite have to be done at the initial stage.
A theodolite measures distance manually by chains of standardized length or metal measuring tapes along the length of the desired angle. The line of sight of theodolite can be rotated through 180 o in vertical plane about its horizontal axis. Set up the tripod legs, taking care to set the height where the instrument sight will be at a comfortable eye level. Adjustment of the theodolite temporary adjustment setting up the theodolite 16. An automatic level includes an internal compensator mechanism, which when set automatically removes any variation. Theodolite is used for measuring horizontal, vertical and deflection angles. Here in we have gathered some pdf lectures on surveying.
This video will give you a very basic idea of the process, but there. Auto levels are thus much easier to use and set up time is a. The instrument will be in the selecting mode 1, and the digit no. Hold one end of tape at one point, and extend it out to another.
Drive a surveyors nail into the ground at the point where you want to set up the theodolite. We hope students all over the world will find it helpful. These adjustments of theodolite have to be done to measure the correct angles. Wild t2 mod user manualdescribsion beschreibung wild heerbrugg ag wild t2 mod theodolite user manual. The latest theodolites have infrared distance measuring devices, for which regular infrared inspection is essential. These measurements are used to plot boundary lines, building foundations and utility routing. However a vernier theodolite measures the angles up to and accuracy of 10, 20. Depending on the job nature and the accuracy required, theodolite produces more curved of readings, using paradoxical faces and. If the instrument is tilted too much, symbol b will. Theodolite is used to measure the horizontal and vertical angles. The tilt angle of the instrument can be compensated automatically by the device. Surveying is a very important part of civil engineering. The theodolite is set up at the site under investigation, levelled and a marker pin placed on the ground to mark the station.
Universal theodolite widely used for triangulations up to 3rd and even 2nd order limits, precise traversing, subtense measurements, astronomical observations, tacheometry, engineering work of all types, cadastral layouts, stakingout straights and curves, mining surveys and special industrial purposes, for which the special interchangeable. Troubleshooting the rem measurement the only numerical input is the target height so make sure that is entered correctly. Setting up a total station and basics of operation duration. Tape measuring the distance from a to b using tape 1. Wild theodolites and accessories for every survey task source. With this methodexperiment a target is marked on the vertical bar of the used structure. Try the clamps and motions for smooth operation clean the exterior of the instrument frequently. Setting up the automatic level learn how to set up and operate an optical level.
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. Wild heerbrugg t2 mod user manual pdf file in english. Surveying by using digital theodolite linkedin slideshare. You will be using a universal theodolite, model wild t2, for these measurements. Mark the point at which the theodolite will be set up with a surveyors nail or a stake. Surveying instruments operators manual dt240 dt540 dt740 dt940 dt540l dt740l dt940l digital theodolite class 2 laser product. These are important in order to eliminate errors in. Uses are endless, and the app is great for land measurements, outdoor sports, sightseeing, navigation, and finding your way around.
So far, weve seen how to set up the theodolite, weve also seen how to get it. Now, and only now, place the instrument on the tripod and secure it with the central fixing screw. When th is changed make sure you hit the ok function key. Once the theodolite has been levelled, it is necessary to select a reference object ro. Theodolites are essential surveying instruments used for the measurement of horizontal and vertical angles. A surveyors theodolite is used to measure horizontal and vertical angles. Theodolites are similar to total stations, except that the total stations are used when the. Measurement of horizontal angle measurement of angle abc the instrument is set over b. Though these devices may look intimidating or confusing, dumpy levels are fairly easy to use once you know how to set them up and what kinds of measurements they provide. Topcon dt200 series instruction manual pdf download. The lower clamp is kept fixed and upper clamp is loosened. This point is the basis for measuring angles and distances. Many times the offset hubs are destroyed accidentally during the construction of the slopes and all references to centerline are lost. Make sure the height of the tripod allows the instrument the theodolite to be eyelevel.