It is also called as automatic level or builders level. Wild heerbrugg auto level nak0 parts broken lens parts repair nak0 transit. Notice that the telescope is rigidly fixed to the supporting frame. Tripod to support the above three parts ofthe level. Dumpy level surveywhat, where, how, parts civil engineering. Difference between dumpy level and auto level civil. Dumpy level, wye level, reversible level such as cookes reversible level and cushings level, and. The telescope can rotate only in a horizontal plane.
Dumpy level the dumpy level is a simple, compact and stable instrument. It is a continuation of the first course held in the same. Contour lines cannot cross one another or merge on the map. It is used in archaeological surveying to measure horizontal levels, for example to demonstrate the difference in height at the top and base of a slope such as.
A dumpy level does not refer to a level far past its prime, but rather to an instrument used to measure, transfer, or set horizontal lines. Figure 52 shows a dumpy level and its nomenclature. Recording and analysing obtained readings using autocad and excel. The following dumpy level operators manual is provided with sokkia b40 instrument. General handling precautions before starting work or operation, be sure to check that the. The bubble in the tube has to be brought in the center to leveling the base of the instrument. Dumpy level,abney level,tilting level,digital level. Do not disassemble the instrument or attempt to perform any internal servicing as this will void your warranty. Imex lar 32 auto dumpy level professional dumpy level.
This reduces the need to set the instrument base truly level, as with a dumpy level. Parts of a dumpy level levelling head telescope eye piece. Parts of a theodolite parts of a theodolite, an indispensable tool for surveying. Optical dumpy level manual pdf pdf kindle galedeneb. Dumpy level doug keith, a professor at purdue university, demonstrates the dumpy level. Dumpy level surveying components, procedure, advantages.
A long bubble tube is attached to the top of telescope. Imex lar 32 auto dumpy level is one of the most robust autolevels dumpy level available. If the line is longer than the tape, an intermediate point or points must be set on line and. The following consecutive readings were taken with a dumpy level and 4 m levelling staff on. The tape must be held as close to level as you can and on line while making measurements. This video is based on one version of an automatic level and although other makes and models look. Fundamentals of soil and water conservation engineering theory lecture outlines.
Study of components of dumpy level and leveling staff. The telescope is rigidly fixed to its support and it can neither be rotated about its longitudinal axis and nor it can be removed from its support. A dumpy level, also known as an automatic level or builders level, is a tool designed to find the height of land masses. Dumpy level is an optical surveying leveling instrument consisting a telescope tube firmly secured in two collars fixed by adjusting screws to the stage by the vertical spindle. The dumpy level is a very simple basic instrument, while the tilting level has certain modifications, which give greater convenience of operation and a possibility of greater precision. Theodolite parts and its functions for angle measurements in surveying theodolite has many parts which needs to be adjusted every time while surveying. Please follow the instruction properly to operate dumpy level properly. Includes the 710 tilting level, the 715 leveling kit, and many accessories. Line of collimation it is a line joining the intersection of cross hairs of. Wye level y level in levelling definition and procedure. This video shows you the parts of the automatic level. File type pdf wild t theodolite manual wild t theodolite manual.
Though these devices may look intimidating or confusing, dumpy levels are fairly easy to use once you know how to set. In the dumpy level, to level the bubble, one has to keep bubble parallel to two leveling screws and then right angle to the third screw. Optical1p auto dumpy level package with tripod and staff. This manual contains important safety directions as well as instructions for setting up the product and operating it. Level telescope it is the instrument used for levelling.
Imex lar 32 auto dumpy level is combining an all steel, fully sealed housing, for all weather protection and high magnification. A dumpy level is a leveling tool used in surveying. They were first created when someone thought of attaching a spirit level to a telescope. The bosch gol 32 automatic optical level features a selfleveling compensator, both horizontalvertical cross hairs and stadia lines, 32x magnification lens and large aperture for clear image. Stepbystep guide to dumpy level survey a dumpy level also known as a builders level is an optical instrument used to establish or check points in the same horizontal plane. Wide areas such as were encountered in this type of construction points to the need for contractors to staff their own organizations with a small field party. Chapter 3 surveying equipment, measurements and errors.
Inside the telescope there is a ring, or diaphragm, known as the reticle, which supports the cross hairs. We have a wide range of products to fit the job, including combination laser levels, line laser levels, spot laser levels, laser distance. A contour is an imaginary line on the ground joining the points of equal elevation. Pdf land surveying using auto level, leveling staff and. Auto level atg4 atg6 generator industrial generator. To use dumpy level properly, surveyors may require some operation manual. A levelling instrument essentially consists of tripod or three legged stand, levelling head mounted on the tripod, the limb. Na720724728730730 plus, introduction 2 introduction purchase congratulations on the purchase of a leica na720724728730730 plus. Dumpy level, also known as builders auto level or automatic level is an optical instrument used to establishing same points in the same horizontal plane. Auto level atg4 atg6 foreword thank you for purchasing the topcon green label auto level atg series.
The cross hairs are brought into exact focus by manipulating the knurled eyepiece focusing ring near the. Parts names and uses of auto level and theodolite hope you like this video. Theodolite parts and its functions for measurements in. Their position and elevation above msl is given in a special catalogue known as gts maps 100 km. Its main parts consist of a telescope, a center spindle, and the level tube. May 2005 surveying equipment, measurements and errors 3. Also called a builders level, an automatic level, or a leveling instrument, these gadgets are often used in surveying buildings or land to establish relative height, distance, and bearings from different parts of a site. The dumpy level is a widely used surveying instrument in surveying. Hand levels hand levels can be a great tool for use by professionals and consumers. The telescope is rigidly fixed to its support therefore cannot be rotated about its longitudinal axis. It is used to see the leveling staff kept on a ground point. Combine areas regions, create 3d objects, overview of 3d objects, add. The line joining the two instrument stations is known as the base line. I have a few auctions up and can combine shipping for multiple items.
Before attaching level screw 5570317, apply grease to the threads m7x0. Dumpy level parts and functions pdf to use dumpy level properly, surveyors may require some operation manual. The often used quickset level is a tilting level without footscrews. The different parts of levelling instrument are, a. It is the line joining the intersection of the cross hair and the optical center. Different types of levels, dumpy level and leveling staff. This is the 2nd course held at agrosphere project base jamama and is expected to take a duration of two months from mid march to mid my 2004. It is important to know about theodolite parts and their functions before using it to minimize errors during theodolite surveying. We have gathered some pdf manual for the dumpy level instrument. This manual is produced to assist the surveyor trainees understand the basics of surveying using a level instrument particularly the dumpy level. Contouring, characteristics of contours, uses of contours. Dumpy level 300mm, internal focusing telescope with 200 meters focusing range, with erect image and desired magnification size 9 internal focusing fitted with horizontal circle graduated to read 6 minutes with vernier and can be quickly preset to zero degree. The speed of dumpy level isabout 25% lower than tilting level. The difference between the dumpy level and the wye level y level is that in the former case the telescope is fixed to the spindle while in the wye level, the telescope is carried in two vertical wye supports.
The simplest type consists two parts 1 the head 2 the leg. Elevations of different points and distance between the points of same elevation can be determined by dumpy level. Please read this instruction manual before operating this product. Please store this instruction manual in the carry case for future reference. It is the line joining theintersection of the cross hair and the optical center ofthe objective and its.
Land surveying using auto level, leveling staff and theodolite. What are parts and functions of a dumpy level answers. Agonic lines lines joining points of zero declination are called agonic lines. This could eliminate much rehandling of materials due to miscellaneous errors incurred in using hand operated instruments not intended. When selecting surveying locations, you want to ensure that you are collecting a sufficient number. Surveying civil engineering gate 2020 study material pdf is useful for. A dumpy level or spirit level is used to establish the height difference between two measured points. It is used in surveying and building with a vertical staff to measure height differences and to transfer, measure and set heights. According to the general arrangement of various parts, the levels may be classified as. Bombay high, mumbai and is given in catalogue formed by the department.
The automatic level, which gives a horizontal line of sight automatically, is the most. Divide area into three triangles ade, abd and bcd by joining ad and bd. To determine relative distance among different locations of a surveying land. The level1lasers optical1p dumpy level package is an auto levelling dumpy level with 26x magnification and comes complete with heavy duty aluminium tripod and 2.
For the best performance of the instruments, please read these instructions carefully and keep them in a convenient location for future reference. An automatic level, selflevelling level, or builders auto level includes an internal compensator mechanism a swinging prism that, when set close to level, automatically removes any remaining variation. Storesund february 2008 5 figure 5 gently rock the rod back and forth when surveying and record the minimum observed value, this occurs when the rod is level. The modern form of dumpy level has the telescope tube and the vertical spindle cast in one piece and a long bubble tube is attached to the top of the telescope. A fundamental discussion of the principles employed by the leveling kit. After tightening spanner nut 5570320 onto level screw 5570317, fix and seal it with anaerobic glue glue should not touch painted surfaces and plastic parts. In the auto level, the bubble can be adjusted from any side and any angle with any 3 screws available. Dumpy level is commonly used leveling instrument to locate the points in same horizontal plane. Thanks for watching dont forget to subscribe subscribe my channel. The dumpy level originally designed by gravatt, consists of a telescope tube firmly secured in two collars fixed by adjusting screws to the stage carried by the vertical spindle. They are a very practical and low cost tool with a wide variety of uses. To determine relative height and distance among different locations of a surveying land.
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