Sponsored by geomatics industry association of america. Detailed guide to checking your dumpy level for accuracy and. It is 4 times the instrument as the dw meridian or berger 190b, at about the same price you would expect to pay if you bought one of those models new. Dumpy level surveying components, procedure, advantages. Dumpy level definition is a surveyors level with a short telescope rigidly fixed and rotating only in a horizontal plane. Dumpy level surveywhat, where, how, parts civil engineering. Level the instrument, reading staff a and staff b at a2 and b2. Brand new never used dumpy level my husband purchased these brand new from a well known dealer in dumpy level, get yours now.
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. The telescope can rotate only in a horizontal plane. Dumpy level parts and functions pdf to use dumpy level properly, surveyors may require some operation manual. The advantages which have made the dumpy level so popular is given below. These levels are the ones most frequently used in ordinary leveling projects. 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. 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. Levelling sheets shall be filed in timesequential order in site files, and also. Once the instrument is securely attached, turn the dumpy levelstelescope so that it sits parallel with 2 of the deviceslevelling screws. The often used quickset level is a tilting level without footscrews. Aluminium and wood laser level tripod construction survey stand for leica, topcon, dumpy. To determine relative distance among different locations of a surveying land. Auto level atg4 atg6 foreword thank you for purchasing the topcon green label auto level atg series. Great savings free delivery collection on many items.
This reading is called forward site fs therefore height of point d is calculated as follows height of point d height of instrument hi fs 105. To level the instrument the following operations have to be done. Mounting is done by engaging threads at the base of the instrument called the footplate with the threaded head on the tripod. One full size drawing sheet for lsection and cross section. Calibration is best done by a trained technician using a calibration station. The following dumpy level operators manual is provided with sokkia b40 instrument. 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. Method for checking and recalibrating a level or transit this method is either for an optical or digital level, or a transit being used as a level. Stanley level tools deliver bestinclass accuracy to provide the confidence needed to achieve sturdy and level construction.
Dumpy level is commonly used leveling instrument to locate the points in same horizontal plane. Extremely robust ideal for outdoor usedesigned for outdoor use due to sturdy metal housing with dust and splash protection ip54robust design with builtin target collimator and integrated circular vialcompe nsator lock for safe transportfunctions. The aim of this tutorial is to introduce you to the automatic level and levelling head on the instrument. Level the instrument, reading staff a and b at a1 and b1. Once the instrument is securely attached, turn the dumpy level stelescope so that it sits parallel with 2 of the deviceslevelling screws. Study of components of dumpy level and leveling staff.
We have gathered some pdf manual for the dumpy level instrument. Menu search enter a product to get the results to choose from. The y level or wye level is the oldest and bulkiest of the older style optical instruments. This versatile piece of equipment is used for a range of measuring jobs including setting out, landscaping, profiling and general levelling tasks. The term dumpy level also builders level endures despite the evolution in design. On an auto level, the bubble can be adjusted from any side and angle. Detailed guide to checking your dumpy level for accuracy and how to selfcalibrate please note that this is a guide for you to check your level, we have included instructions on recalibrating but do not recommend you recalibrate your self. Relative elevation of different points of a surveying land is determined with dumpy level. The surface of the spillway must be erosion resistant the spillway must be so located that the spillway discharge does not erode or undermine the downstream toe of the dam it should be provided with some device for the dissipation of excess energy the spillway discharge should not exceed the safe discharge. Elevations of different points and distance between the points of same elevation can be determined by dumpy level. The telescope of dumpy level can rotate only in a horizontal plane. Hold these two leveling screws between the thumb and first finger of each hand uniformly. They were a essential part of surveying, bridge construction, high rise construction, and other important construction projects. They were first created when someone thought of attaching a spirit level to a telescope.
The dumpy level is a widely used surveying instrument in surveying. Relative elevation of different points of a surveying land is determined. Automatic level compensators how things work sponsored by geomatics industry association of america a utomatic levels have been with us since the middle of the twentieth century. Dumpy level definition of dumpy level by merriamwebster. To determine relative height and distance among different locations of a surveying land. Sometimes professional land surveyors or grading contractors will use a hand level to get an. 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. Today, they are so common place that the adjective automatic is frequently not even used. Dumpy level for sale in uk 20 secondhand dumpy levels. Hand levels, abney levels, and dumpy levels explained. Rise and fall,collimation methods technical report pdf available september 2016 with 12,619 reads how we measure reads. A lowpowered telescope is placed in a pair of clamp mounts, and the instrument then leveled using a spirit level, which is mounted parallel to the main telescope.
Once again, the bubble level is centered when the reading is taken. Its more difficult to get precise readings with a dumpy level. Precision survo instruments iti training tools manufacturer. He invented dumpy level in 1832 while using the conventional y level. The dumpy level is mainly used in surveying for the following purposes. It is used for rough leveling and not designed for precision work.
Buy dumpy level and get the best deals at the lowest prices on ebay. A dumpy level is also called a builders level, an automatic level. Auto level atg4 atg6 generator industrial generator. Survey field procedures manual prepared by the division of. It is also called as automatic level or builders level. Bosch professional gol 26 d optical level dumpy level in carry caseadvantages. Optical levels dumpy levels leica automatic levels the. Dumpy level definition of dumpy level by the free dictionary.
They are a very practical and low cost tool with a wide variety of uses. The automatic level, which gives a horizontal line of sight automatically, is the most. But this advance in technology has been the single. 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. Hand levels hand levels can be a great tool for use by professionals and consumers. They can be manual or automatic the latter being much quicker to set up.
Screw your dumpy level onto the tripodsbase plate, then connect the base plate to the main tripod body. Level connect your device to the tripod and position it over 2 levelling screws. How do you put together several pdf documents into one. The 18 inch and larger dumpy levels and wye levels are often overlooked by collectors. Due to the rigidity of dumpy levels, it retains its two adjustment for a long time. For the best performance of the instruments, please read these instructions carefully and keep them in a convenient location for future reference.
A level is an optical instrument used to establish or verify points in the same horizontal plane in. How to use a dumpy levelexample 1 find the difference in height between the benchmark and the top of the slope. Please read this operators manual carefully before using this product. This is a model of dumpy level requires improvments, i need help with creating relationships between parts of the model. To use dumpy level properly, surveyors may require some operation manual. General handling precautions before starting work or operation, be sure to check that the. Perform setting up and centring of the o dumpy level, o auto level. Figure 52 shows a dumpy level and its nomenclature. 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. It is also known as a surveyors level, builders level, dumpy level or the historic y level. 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. Postage prices for the larger manuals, have increased quite a bit since we started this, so call for shipping quote. Most likely you have knowledge that, people have see numerous period for their favorite books like this manual sokkisha auto level, but stop up in harmful downloads. Line of sight adjustment the line of sight has to be manually adjusted on a dumpy level, while the automatic builders level has an internal compensator that does it automatically.
Manual sokkisha auto level thank you entirely much for downloading manual sokkisha auto level. A dumpy level, socalled for its compact design, is a tool used for optical measurement in the surveying and general construction industries. Dumpy level in south africa gumtree classifieds in south africa. Survey field procedures manual prepared by the division of plats and surveys maryland state highway administration revised and edited november,2001. Please follow the instruction properly to operate dumpy level properly. The three screw levelling head is found on most modern survey instruments including levels, theodolites, and edm systems. A dumpy level also known as a builders level is an. Surveying automatic levels, builders levels, autolevels. English civil engineer william gravatt is considered as the inventor of the dumpy level. The level used by indot typically is the dumpy type level with a magnification of 26 to. A dumpy level, builders auto level, leveling instrument, or automatic level is an optical instrument used to establish or verify points in the same horizontal plane.