To use dumpy level properly, surveyors may require some operation manual. 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. Stadia the stadia lines on the reticle allow distance measurement to be carried out. Components, procedure and advantages of dumpy level surveying is. And if you need any repairs for any reason there are qualified people in our repair shops all over the u. Mark the point at which the theodolite will be set up with a surveyors nail or a stake. The parts of an optical level basically, an optical level is a telescope a that can be set perfectly level by turning the leveling screws b and watching the sensitive vial or bubble c. The user is required to be a qualified surveyor or have a good knowledge of surveying, in order to understand the user and safety instructions, before operating, inspecting or adjusting.
With the ipx6 rating, the instrument is protected against. Optical survey equipment leica na720 automatic level. Material estimation repairprotection guide material testing guide mix design guide rate analysis geotechnical. The leica na720 automatic level is extremely popular within the construction industry being known for its increased robustness and precision when working in tough environments. Automatic level 28x26x24x22x telescope magnification 2. With a self leveling laser level you can be assured that your measurement will be as accurate as humanly possible. A perfectly designed mirror makes it extremely easy to adjust the horizontal level with the highest possible accuracy and confidence. Simply multiply the staff length between a b the top and bottom stadia lines by 100.
Dumpy level surveying components, procedure, advantages. Many of the current and recent model instrument manuals can be downloaded for free from the cstberger website selfhelp section. The right level for every application do you want to measure distances, assign datum lines, define height differences or read heights. But itll help you get the best possible performance from all of our instruments. Download download cowley level manualsread online read online cowley level manualshow to use dumpy level cowley level repairs water level try the free download at the below link appropriately named cowley automatic level manual free download. Here you will find all available manuals which you can download view andor print for dave white sitepro brands instruments and tools. It is a continuation of the first course held in the same. Oct 18, 2017 download download cowley level manualsread online read online cowley level manualshow to use dumpy level cowley level repairs water level try the free download at the below link appropriately named cowley automatic level manual free download. The range extends from the simple dumpy level, used by the builder or farmer for construction or drainage tasks, to the precision level for the civil engineer or geodetic surveyor who requires the highest possible accuracy. Survey field procedures manual prepared by the division of plats and surveys. Level the instrument, reading staff a and staff b at.
If your tool is a model not listed on the website, email us with your information. Set up the level so that the sighting distances to a and b are about the same. Otb user manual french pdf otb user manual french pdf pdf. Free rotation feature allows you to read any angle from zero. Mounting is done by engaging threads at the base of the instrument called the footplate with the threaded head on the tripod. Secondary objectives secondary aims are to provide. Bosch optical level kit with 32x magnification power lens.
To find out reduced levels of given points using dumpy auto level. Theodolites how does a theodolite work theodolite vs. How to level using dumpy level civil engineering surveying. Calibration it is recommended that you check your lcl4 periodically to assure its accuracy. The telescope can rotate only in a horizontal plane. A dumpy level also known as a builders level is an optical instrument used to establish or check points in the. This makes it easy for the reader to know the meaning of the contents otb user manual french pdf epub. The telescope can be rotated over a 360 degree scale d so that angles can be measured and read off.
Level tube is permanently placed so that axis lies in. Onsite hazards such as falling to ground from a low height, exposure to water and vibrations caused by heavy machinery are no problem for the robust leica na720. The leica runner 24 dumpy level is a robust, budgetpriced construction level. The circular level can be seen on a pentaprism or plane mirror located beside the telescope eyepiece. Wild levels for every leveling task technical data. A dumpy level, builders auto level, leveling instrument, or automatic level is an. The internal spirit level makes sure the device is level to to the horizon. Level the instrument, reading staff a and staff b at a2 and b2. Fast, easytouse and accurate levels, suited for both indoor and outdoor use offering you the best of sokkias renowned levelling technology, the c300, c310, c320 and c330 automatic levels are compact, solid, fast and.
Dumpy level construction training and maintenance manuals. A short drop onto the ground, a fall into water, vibration from heavy machinery with a leica na720 level you just carry on working. A bit sad as the level still has the original paper tag on the handle. To measure bearings of a closed traverse by prismatic compass and to adjust the traverse by graphical method.
To describe the instruction for the calibration of dumpy level to ensure that equipment is maintained in fully serviceable condition, is safe to operate and meets. Produced by nathan altman, a purdue bcm spring 2009 graduate. All instructions required in order to operate the product to a basic level are contained in the user manual. Horizontal angles can be directly read in 1 or 1gon units.
Protected service centres worldwide ensure you work with complete peace of mind, wherever a construction site is located on the globe. Level the instrument, reading staff a and b at a1 and b1. Accuracy and precision accuracy and precision are two different, yet equally important surveying concepts. Study of components of dumpy level and leveling staff. Choose two walls approximately 4 5 metres apart figure 1. These levels are the ones most frequently used in ordinary leveling projects. It was designed by surveyors and development engineers with years of experience and who know what a field instrument has to be able to do. Hard carry case, na332, user manual batteries included. One of the best books of the year is a book titled otb user manual french pdf pdf download free that gives the reader a good inspiration. Survey field procedures manual prepared by the division of. The graduated circles, one vertical and one horizontal, allow the user to actually survey for angles. Centre the bubble by adjusting the levelling screws until level. Leica na2 the classical level from leica geosystems the na2 universal automatic level meets all requirements regarding precision, convenience and reliability. A comprehensive reference for new employee orientation.
Handle the instrument carefully when moving the instru. Set up the level so that the sighting distances to a and. To check the compensator accuracy, place the optical level onto a solid tripod between two staves spaced 30m to 50m apart. With the laser 15cm away from and facing surface 1, carefully mark the center of. They are maintained in pdf format for easy download and view. The case also contains a user manual and a plumb bob, which can be used to help set the instrument up above a point. A dumpy level, builders auto level, leveling instrument or automatic level is an optical instrument used in surveying and building to transfer, measure, or set horizontal levels. Instruction manual for a leica dumpy level south australia. What is a dumpy or automatic level and a laser level. Aug 27, 2019 to use dumpy level properly, surveyors may require some operation manual. Please follow the instruction properly to operate dumpy level properly. Dumpy level manual pdf are you searching for dumpy level instruction manual. Figure 52 shows a dumpy level and its nomenclature. Refer to the following resources for all na720724728730730 plus documentation.
The tape must be held as close to level as you can and on line while making measurements. Apr 16, 2009 doug keith, a professor at purdue university, demonstrates the dumpy level. Below are some links to purchase my preferred auto. Dumpy level is commonly used leveling instrument to locate points in same horizontal plane. It came complete with its original case see figure 20. Read both the verniers, the mean of the verniers will give the angles aob. Depending on the application and the required level of accuracy, the na700 series has the right level for your daytoday tasks. 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. Apr 08, 2020 dumpy level manual pdf are you searching for dumpy level instruction manual. If the line is longer than the tape, an intermediate point or points must be set on line and two or more measurements must be made and recorded separately in the field book. No timeconsuming checking or readjustment required. Please read this instruction manual before operating this product. Help employees in other offices gain a better understanding of surveying and its proper relationship to other administration activities. For short distances in cleared, level areas, the operator may carry the instrument mounted on the tripod.
How to use dumpy level tutorial with example civil engineering. Do not disassemble the instrument or attempt to perform any internal servicing as this will void your warranty. Make a page of field book for dumpy level survey find out the. Loose the upper clamp and turn the telescope clockwise to point b. Download and view user manuals dave whites sitepro. Accuracy is the degree of conformity of a given measurement with a standard value. Exceptions from responsibility standard set component. Dumpy level is a very useful instrument for civil engineering survey. Please store this instruction manual in the carry case for future reference. This otb user manual french pdf pdf kindle is delivered in simple words. It came complete with its original case see figure 20 and. Moreover, the c3 series automatic levels guarantee superior performance regardless of weather conditions.
Atb level hex wrench adjusting pins atb2 only vinyl cover cleaning cloth user manual hard case. Set the instrument over o and level it set the vernier to zero and bisect point a accurately. Leica geosystems 840383 na332 360 degree auto optical level. Dec 25, 2017 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. 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. We have gathered some pdf manual for the dumpy level instrument. An automatic level, self levelling level or builders auto level, includes an internal compensator mechanism a swinging prism that, when set close to level, automatically removes any remaining variation from level this reduces the need to set the instrument truly level, as with a dumpy or tilting level. 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. The level comes supplied in its own carry case, which protects it from bumps, and keeps it away from the elements. The cowley level was invented by australian keith cowley in 1944.
Each wild level has been designed for a particular field of application and with a definite type of user in mind. Dumpy level setup and use tutorial civil engineering. It will probably be like the one pictured, and has an eyepiece, bullseye spirit level and 3 levelling screws as well as a focus for the telescope lens quite often the base has a 360 degree compass, for laying out, however as you now know how to create perfect right. Many people come to this blog only to find otb user manual french pdf pdf online. 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. Measuring with the level 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 staking out point heights in an excavation, a point b is to be set out at a height. This feature dramatically facilitates the works in confined spaces. If carried on the tripod, it must be carried upright. The following dumpy level operators manual is provided with sokkia b40 instrument. The more expensive leica models, redback and nikon. The dumpy level is a simple and compact instrument. For a start, setting up the levels can be done fast and quickly and sighting is just as simple.
The leica na300 series levels along with all our automatic optical levels are made for everyday use for any site. Once the instrument is securely attached, turn the dumpy levels telescope so that it sits parallel with 2 of the devices leveling screws. If the bubble moves out of centre it will need further adjustment. This manual is produced to assist the surveyor trainees understand the basics of surveying using a level instrument particularly the dumpy level. In this tutorial you will learn the set up process of a dumpy. A laser level is a fairly recent invention, and has changed the way surveying is being done. A dumpy level is an older style level that required user skill to set accurately. Lufkin lcl4 measuring instruments pdf manual download.
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