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