How to use Levelir

Level is a geodetic device to determine the height of both items on the ground and the locality itself. The determination of the altitude mark of some object, building or terrain is measured by the difference in an unknown object from the known (rail) horizontal beam.

Levels are:

High-precision, permissible error of 0.2-0.5 mm per 1 km of stroke to the object.
Accurate, error of 0.5-2 mm per 1 km.
Technical, with an error of 2-10 mm per 1 km.

1

What does level look like?

Previously, basically used optical levels, and now laser and electronic levels appeared.

Consider an optical level, since electronic or laser use easier. It consists:

Trenoga or tripod with lifting screws for adjustment to which an optical node is installed (level, pipe).
Round level.
Stand for the visual pipe.
Summary tube.

2

Where does the level apply?

Without a level, do not do in construction. After all, the most important condition for the construction of a small house or a large building is an impeccably smooth surface. If the surface on which the walls are erected is uneven, after their construction, they can crack them through a short time, turn the doors to turn the windows in the windows.
When booking a new park or garden so that the rows of trees are smooth, they are placed using levels.
Also, leveling needed during the construction of the fence, gazebos, laying sidewalks, playgrounds.
Without a level, no geodesic organization does not do, without it it is impossible to conduct topographic surveillance, land suprowork work in the state cadastre.

3

How to use Levelier?

First install tripod. To do this, we relax the fastening screws on the legs of the tripod, set it horizontally so that the level is at the chest level, and fix the screws on each leg. If the terrain is uneven, the legs can be of different lengths. With a level, it is impossible to work in the rain or shake it, because it can fail.
We install the visual tube on the tripod and screw it with a fastening screw located on a tripod.
We give a level at a horizontal position: rotate 3 adjusting (large) screws and we achieve that the air bubble in the round level has taken the central position.
Set up a level or focus. Now you need to adjust the eyepiece of the visual pipe for the vision of the operator, since everyone's acuity is different. To do this, we bring the device to a lit large object and an ocular ring of achieving the most clear image. Then I put the rail to the desired distance in a less lit place, and also achieve the greatest definition.
Geodesic or level racks. For leveling, 2 rails are needed. They have a length of 3 m or 5 m, on the one hand are drawn mm, with the other, see to be more convenient to use, part of the divisions are connected to the letter E. Height of such a letter 50 mm.
Geodesic rails are from wood folding and telescopic from aluminum or plastic. Folding wooden rails folded in the center, the telescopic using the button is folded. Reiki has a black and red party.
Alignment in height. Example. We have a rectangular plot with 4-dots. It needs to be aligned. Rake set the base as close as possible to the point that needs to be measured. In the eyepiece, we observe the grid on the midline - this will be excess. Write it. Then we measure the following points. Determine at what point we will align. If one or more points are less from the generally accepted point - the soil will have to add, if more - remove.
Method of performing leveling in the middle line. This method is high-precision. We choose the place to be visible to have all the points that are going to be taken, and to the nearest point at least 5 m. One rail is set ahead of the device in front of the device. Rake ahead (basic) shows the meaning of the height that is measured, the rear rail is needed to apply marks.
We carry out the level on the rear rail, the black side focus and write down the strokes. Then focus the value of the front rail on the red side.