What is Auto Level or Level Machine?

The auto level is a tool used for leveling works in the civil construction field. This instrument measures the height of any point with the reference to a benchmark, also known as a level machine

 

A level is an optical instrument used to lay out or confirm focuses in a similar even plane in a cycle known as an evening out and is utilized related to an evening out staff to lay out the general level degrees of items or imprints. It is generally utilized in reviewing and development to quantify level contrasts and to move, measure, and set levels of known articles or checks.

It is otherwise called an assessor's level, manufacturer's level, dumpy level or the memorable "Y" level. It works on the guideline of laying out a visual level connection between at least two focuses, for which an inbuilt telescope and an exceptionally precise air pocket level are utilized to accomplish the fundamental exactness. Customarily the instrument was totally changed physically to guarantee a level view, yet current programmed variants self-make up for slight blunders in the coarse evening out of the instrument and are in this manner speedier to utilize.

Description:

                              The total unit is regularly mounted on a stand, and the telescope can uninhibitedly turn 360° in an even plane. The assessor changes the instrument's level by coarse change of the mount legs and fine change utilizing three accuracy evening out screws on the instrument to make the rotational plane flat. The assessor does this with the utilization of a pinpoint center level incorporated into the instrument mount.
 
The assessor glances through the eyepiece of a telescope while an associate holds an upward-level staff which is graduated in inches or centimeters. The level staff is put with its foot on the point for which the level estimation is required. The telescope is pivoted and centered until the level staff is doubtlessly noticeably deliberately targeted. On account of a shifting level, the fine level change is made by a height screw, utilizing a high exactness bubble level fixed to the telescope. This can be seen by a mirror while changing, or the closures of the air pocket in a "split bubble" show can be seen inside the telescope. This additionally permits confirmation of the precise level of the telescope while the sight is being taken. Notwithstanding, on account of a programmed level, elevation change is done consequently by a suspended crystal because of gravity, as long as the coarse evening out of the instrument base is precise inside specific cutoff points.
 
At the point when level, the staff graduation readings at the focus and stadia marks are recorded, and a recognizing imprint or marker put where the level staff laid on the article or position being studied

 

Innovation

In 1832, English structural specialist and creator William Gravatt, who was charged with looking at a plan for the South Eastern Rail route's course from London to Dover, became disappointed with the sluggish and bulky activity of the "Y" level during the review work, and contrived the more movable, simpler to-utilize "dumpy" level, supposed due to its more limited appearance.

 

The telescope of the memorable "Y" level is held in two metal arms, which are important for the mount and the telescope could be handily taken out to permit locating inversion however 180 degrees or a hub pivot of the telescope; both to make up for optical collimation blunders. Since the telescope isn't fixed to the level-changing component, the "Y" instrument is gathered and dismantled for each locating station. In any case, the dumpy level is forever gotten to its two help arms and the evening out component, accordingly diminishing estimation vulnerability and extensively lessening the time taken to set up the instrument. The dumpy proposes a similar fundamental rule of level locating.

 

Benchmark
Benchmark is the reference point which is supposed to be zero level of the sea level or any value like 100.
A level machine is used for transferring elevation from one place to another elevation is the value of height and it changes vertically.
Functions of level machine.
A level machine is used to establish or verify vertical height in the civil construction field this process is called leveling and is used in conjunction with leveling staff and tripod to perform this action
Main roles of auto level machines in the construction field
Building levels
Before starting construction of the building it must know the levels of the area and road around the building and also level machine is used inside the building for floor level and height of the wall.
Sewerage line leveling.
Laying the sewerage line underground must need a slope so that the water can easily slide into the pipes. For this purpose, a level machine is the best equipment to proceed with this work.
Landscaping leveling

 

Road leveling

The surface of the earth is not one level when we construct a road we need a certain gradient way to connect up and down the level this process of level is called road leveling.
The auto-level machine is the best equipment for leveling roads and slopes of roads and also for Sewerage lines.

Parts of Level Machine.

1       Base plate.

In the center of the base plate, there is one hole for the screw-fixing level machine on a tripod stand.

2       Foot Screw / Leveling Screw.

Leveling screw for leveling the level machine during setting out of the level machine.

3       Bearing Ribbon

Usually bearings aren’t needed for leveling works

4       Object Glass.

Through object glass, you can see the leveling staff reading.

5       Bubble tube.

6   you can know whether my level machine is bubbled or not.

7       Eyepiece.

For focusing cross hair while watching your staff reading.

8       Focusing screw.

To focus your staff reading.

9       Imaging mirror for bubble.

To show your bubble from the side during working.
 image parts of auto level or level machine

Inside parts of a level machine

1.    Eyepiece.

Eyepiece is used for adjusting the crosshair

2.    Crosshair. 

Crosshair is the cross line that appears in a telescope for reference in which one is vertical and the other is horizontal the horizontal is used for taking readings on staff. On the vertical crosshair, there are two small horizontal lines up and down which are used for measuring distance

3.    Telescope.

The telescope is for focusing the staff.

 Other tools with level machines to perform work
1       tripod stand
2       leveling staff

How to work on the level machine:

Ø Set a level machine from where you can see your benchmark and the area where you have to work.
Ø Keep your level machine in place which is stable for
For example: don’t set on plywood, steel plate, or surface on which your machine slides away.
Ø Marking for level must be in a range not exceeding 5 meters in height
Example: when you set your machine and you want to mark a level below 5 meters so you can’t because the length of the level staff is 5 meters
Ø Don’t disturb your level machine when you set utile finish your work at the same Height of instrument.
setting out procedure:
Open the tripod and keep auto level on the base plate of the tripod and tight the fixing screw
Level your auto level with the help of the tripod leg and then from leveling screw
Then take a reading on benchmark and note that reading is back sight reading
Add your back sight reading to benchmark elevation and that is your height of the instrument.