Taking levels height of collimation level book youtube. They are a very practical and low cost tool with a wide variety of uses. Before initiating the crosssection survey, be sure to start your crosssection field notes sheet figure 4. 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. It is also called as automatic level or builders level. 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. Field has also been awarded both state and national honorary ffa awards. Great savings free delivery collection on many items. Customers who purchased this product also commonly purchased the following combination of items. The following table shows a page of level book for rise and fall method. Again, start out slow and easy with a readily available small dumpy or wye level. Comes with a better protected shape, these rugged level increased ergonomic handling while ensuring you receive the results at the value. Field book or level book calculations are carried out on the readings noted during a survey operation called levelling.
Total station, tripod, pin, plumb bob, reflection rod, and field book lab procedure a. They were first created when someone thought of attaching a spirit level to a telescope. The automatic level, which gives a horizontal line of sight automatically, is the most. Dumpy level is commonly used leveling instrument to locate the points in same horizontal plane. Gurley dumpy level 18 19 surveying instrument with box. 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 an excavated pit or a surviving earthwork. Full text of notes on the adjustments of the dumpy level. The examination papers of various boards of technical education and amie have been included in the appendix along with hints and solutions. This video shows you how to calculate out the height of collimation level book as an alternative method of working out the reduced level. 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. Rule out a page of a level field book and enter the above readings. A dumpy level also known as a builders level is an optical instrument used to establish or check points in the same horizontal plane. However, modern forms of dumpy level generally have erecting eyepiece so that inverted image of the staff is visible in the field of. 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.
Instruments for levelling level and types of level level the instrument used to furnish horizontal line of sight for observing staff readings and determining r. A dumpy level, also known as an automatic level or builders level, is a tool. A dumpy level, also known as an automatic level or builders level, is a tool designed to find the height of land masses. The y level or wye level is the oldest and bulkiest of the older style optical instruments.
They often contain notes about buildings and topography, astronomical observations for charting coordinates, boundary marks and other details. But, and its quite a big but, the greater the magnification the smaller the field of view. 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. After reading the staff and noting the reading in your book, look to see that the bubble is still in the centre of ts run, and read once more as a check on the first reading. Point telescope at the reflection mirror and press distance. The tape must be held as close to level as you can and on line while making measurements. Total station surveying instruments blow me away, having sweated through surveying camp hacking brush to get a line of sight and sitting up most of the night to do our calculations from what we entered into our field books during the days. Edm measuring the distance from a to b using total station 1. Dumpy level surveywhat, where, how, parts civil engineering. Do not try to take longer sights than will admit of eading the staff distincdy. These should be entered up in a field book divided into columns as shown below. Rule out a page of level field book and make entry of above. The term dumpy level also builders level endures despite the evolution in design. This manual is produced to assist the surveyor trainees understand the basics of surveying using a level instrument particularly the dumpy level.
Spectra precision nikon ne101 surveying theodolite 7accuracy. Unique design whether youre facing basic demands or you need more support, the unique design of the 300 series of automatic dumpy levels can meet you wherever you are in the building and construction field. This video shows you how to calculate out the rise and fall level book so that you are able to establish the reduced level of the point that. Dumpy level the dumpy level is a simple, compact and stable instrument. The reading on the staff is recorded through telescope of dumpy level. Same as the old dumpy or wye levels, just look like a toy next to the classic old wye or dumpy levels. Your field book shall include your name and group information on the first single page and a table of contents on the first double page. Setup total station at a point on traverse center and level, and hold reflection rod at another point not the diagonal point. So you see a smaller area through the eyepiece, this can mean that finding the staff to read can. Dumpy level, levelling staff, tripod, staff bubble, chain or tape. Collectors guide to antique surveying equipment 200009. Surveyors use field books to record both survey data and notes as surveys were carried out.
The rl can be computed in two ways 1 height of collimation 2 rise and fall method. Calculate the reduced levels of the points by rise and fall method. How to use dumpy level tutorial with example civil. Your field book shall be kept neat and orderly as it will be collected.
A record of each field assignment shall be kept in your field book. Your field book shall be kept neat and orderly as it will be collected and graded. The book covers the syllabi of diploma, degree and amie courses and a few topics are also included to aid practising engineers. Spring 2016 field book university of colorado boulder. Notes on the adjustments of the dumpy level microform. Hand levels, abney levels, and dumpy levels explained. Your field book shall be kept neat and orderly as it will be collected and graded periodically throughout the quarter. The telescope is fixed to its supports in dumpy level and hence it cannot be. To use dumpy level properly, surveyors may require some operation manual. Survey field procedures manual prepared by the division of plats and surveys maryland state highway administration revised and edited november,2001. Software field book data to reduced level conversion. A telescope is fixed to its support but the leveling head has the ability to be rotated horizontally. Dumpy level surveying components, procedure, advantages. The name dumpy level originated from the fact that formerly this level was equipped with an inverting eyepiece and hence was shorter than wye level of the same magnifying power.
A dumpy level also known as a builders level is an optical instrument used to. Using the example from the post how to carry out a levelling traverse or run we would complete the field book in the following manner using the rise and fall surveying method the first part of the booking process is to complete the heading of the page. Select field book from input and select esurvey section excel format from output group. We have gathered some pdf manual for the dumpy level instrument. This video shows you how to calculate out the rise and fall level book so that you are able to establish the reduced level of the point that you have surveyed. Some of the online auction sites are good sources for this type of information, but it takes a lot of researching to get a good feel for it. The often used quickset level is a tilting level without footscrews. It is important that the date is recorded you may wish to record the time also. Elevations of different points and distance between the points of same elevation can be determined by dumpy level. The 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. Buy dumpy level and get the best deals at the lowest prices on ebay. You will want to identify the field personnel, the data, the equipment, and this will be the location where you record the station and elevation readings which will be subsequently. Make sure you write clearly and record the date, where the survey.
Click on fb template and fill all your field book level book data in that excel sheet and save it. Survey field procedures manual prepared by the division of. Select saved excel file, by clicking on next to select file textbox. There are a couple of books on the subject, but they are either somewhat outdated pricewise or incomplete. The telescope of dumpy level can rotate only in a horizontal plane. Field books are durable and waterresistant to withstand the harshest job sites. Dumpy level in collectible surveying equipment for sale ebay. Dumpy to the rescue i can read pre level 1 by julie edwards and a great selection of related books, art and collectibles available now at. Make a page of field book for dumpy level survey find out the. This video shows you how to calculate out the height of collimation level book as an alternative method of working out the reduced level of the points that you have.
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. 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. We will first understand the levelling process in detail and then we will look at how to calculate a reduced level in the field book. Hand levels hand levels can be a great tool for use by professionals and consumers. Where, however, the ground is of an irregular nature it may be necessary to take several levels. The following consecutive readings were taken with a dumpy level and 4 m levelling staff on. He is a member of the nacta, namcde, and the national safety council. Amazons choice for dumpy level huepar al32x automatic optical level with selfleveling magnetic dampened compensator, heightdistanceangle measuring tool, 120m working range, 1. Pentax r1505n 5 series total station reflectorless 500m, dual display, memory 60,000 points.239 1438 1249 933 568 366 292 1259 1242 1171 464 860 404 1415 1467 1031 492 220 1174 856 1287 1599 110 728 228 20 1245 897 510 1426 714 1084 1256 1000 799 196