How to detect the i angle of the level 5

First according to the front and back is equidistant erection of the instrument, generally 80 meters, the observation of two points is calculated as the height difference, because the equidistant can offset the I angle error, the measured two points of the height difference is correct, and then move the instrument to one of the vertical ruler points, set up the instrument about three meters away from the leveling ruler, observe the two points to find the height difference, compare the two height differences, if the two height differences are relatively close to the difference, indicating that the instrument I angle error is not much of a problem, if the difference is larger, it means that the instrument needs to be checked. Of course, you can also divide the difference between the two heights by 80 and convert the result into seconds, the difference in the I angle of DS1 is 15 seconds, and the difference of DS3 is 20 seconds.

Here's how it works:

On a horizontal line, there is a cross wire A two meters to the level, and there is a cross wire B at infinity, after focusing, let the cross wire of the level coincide with A, and then focus on the infinity to see if it coincides with B, there is a scale in the lens barrel of the correction table, and you can see how much the I angle is different.

Let the two points of AB be meters, first place the instrument at a distance from point A meters, from point B meters X2, measure the height difference of AB, place the instrument at a distance from point B meters, distance from a point meter X2, measure the height difference of AB, and determine whether the I angle exceeds the limit according to the difference between the two height differences. The third and fourth level is generally 2mm.

Look at the manual, it's hard to say this. Or find a dealer, as long as there is a calibration table.

This is the formula for calculating the i-angle, which is a whole and cannot be understood separately. The i-angle is found by two levels and the position of the level is changed. For details, please refer to the country.

The inspection of the I angle of the first and second class level measurement specification B16 level. Or refer to the inspection of precision level and level ruler in the first volume of control measurement published by Wuhan University Press.

A level is an instrument that establishes a horizontal line of sight to measure the height difference between two points on the ground. The principle is to measure the height difference between ground points according to the leveling principle.

The main components are the telescope, the tube level (or compensator), the vertical axis, the base, the foot spiral. According to the structure, it is divided into micro-inclination level, automatic leveling level, laser level and digital level (also known as electronic level). According to the accuracy, it is divided into precision level and ordinary level.

The level came after the invention of the telescope and the level in the 17th and 18th centuries. At the beginning of the 20th century, micro-tilt levels were produced on the basis of the production of internal focusing telescopes and conforming levels. In the early 50s of the 20th century, an automatic leveling level appeared; In the 60s, a laser level was developed; In the 90s, electronic levels or digital levels appeared.

A commonly used level of view to obtain a horizontal line of sight with the help of a micro-tilt spiral. During the operation, the instrument is roughly leveled with a circular level, and then with the help of a slight tilt spiral before each reading, the conforming level is pitched in the vertical plane until the conforming level bubble is accurately centered to make the line of sight level.

Compared with the ordinary level, the former tube level has a small division value, high sensitivity, large magnification of the telescope, strong brightness, and a solid instrument structure, especially the connection between the telescope and the tube level, which is equipped with an optical micrometer and a precision leveling scale to improve the reading accuracy.

The micro-tilt precision level produced in China has a telescope magnification of 40 times, a tube level of 10 2 mm, an optical micrometer with a minimum reading of millimeters, and the telescope alignment part, the tube level and the optical micrometer are all jointly installed in the heat shield.

The spirit level is calibrated as follows:

How the spirit level is calibrated.

First to level a plane, then turn the level to another plane, if this plane is uneven, use the needle to rotate the bubble at the spiral, level it, and then turn it to a plane to adjust, only after the three sides are leveled.

What to pay attention to when using a spirit level.

1. Before using the instrument to measure, the surface should be wiped clean with water, and at the same time, it should be checked whether there are some scratches, rust and other problems on the surface of the instrument. If there are any problems, they must be dealt with immediately to prevent inaccurate measurement due to the instrument.

2. Also check whether this instrument is zero, if it is not in the zero position, you need to adjust this level before you can use it. When adjusting, the instrument should also be placed on the plate so that the scale of the bubble tube can be read.

3. When measuring, the temperature should also be paid attention to, and the use of the level will also be affected by some ambient temperatures, so it is best to avoid the high temperature environment, or it will not affect the reading of the instrument. When in use, the instrument should not be exposed to direct sunlight, let alone breathe on the level, or it will have some impact on the reading of the level.

4. When using, the position of the vertical level should be read to prevent some errors in the reading, and the results will also have an impact on the measurement.

5. The level should also pay attention to the storage problem, it must be placed in a dry and ventilated environment, and some radiation objects can not be placed nearby, so as to prevent the instrument from being damaged.

The angle between the collimation axis of the level and the horizontal axis in the vertical direction.

Place the level in the middle of the two leveling scales, the instrument is about 30 meters or 40 meters away from the scale, about the same distance between the front and back, and read the readings on the scale to get the height difference between the two points. The distance from the instrument to the scale is only a few meters for the near scale and the distance for the distance is several meters. Similarly, if the height difference between these two points is equal, it means that the angle of the instrument i is zero.

The unequal height difference indicates that there is an error in the i angle of the instrument.

For example, if the instrument is in the middle, read A1 0962 for ruler A and 1062 for ruler B

On one side, the instrument reads A2 0835 for ruler A and B2 0933h1 1062 0962 0100 for ruler B

h2＝－0933＋0835＝－0098

h＝－0098＋0100＝＋2mm

Calculate the i angle according to the formula of the small angle;

i＝δ·s=2mm×206265”/60000mm=41/6”=7”

Summary. Place the spirit level on a flat plate (or machine rail) with a stable foundation and roughly level, and after the bubbles are stable, read at one end as the left end, and set it to zero. Then turn the level 180 degrees, still put it in the original position of the plate, after the bubble is stable, still read at the original end (left end), read out a grid, then the level zero is an error of half a grid.

If the zero error exceeds the allowable range, it is necessary to adjust the zero adjustment mechanism of the level, adjust the screw or nut, and reduce the zero error to the allowable value. For screws and nuts that are not adjusted according to the regulations, they shall not be twisted at will. Before adjustment, the working surface and the plate of the level must be wiped clean, and the screws or nuts and other parts must be tightened after adjustment.

How to calibrate the level.

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The level is divided into mechanical level and electronic level, in which the mechanical level is in the process of calibration, it must be guaranteed that it is above zero, and then the level is placed on the plate, read out a scale of the bubble tube, the plane of the plate is in the same position above the level will be flipped left and right 180 degrees, and then read out the scale inside the bubble tube, if the reading is the same, then it means that the bottom surface of the level and the bubble tube are in a parallel state, if the reading is different, it means that it is inconsistent This time can be inserted into the adjustment hole, Adjust up and down until the scale of the bubble tube is consistent.

If it is an electronic level, when measuring the levelness of the two orthogonal directions of the plane, it can be measured synchronously, wherein, in the process of measurement, the levelness of the x-axis and the y-axis will be displayed, and the verticality of the horizontal direction and the vertical direction can also be measured on a single axis, and in the process of electronic level calibration, click the relevant button, you can complete the horizontal adjustment of 180 degrees, and you can automatically correct its verticality and levelness.

I'm talking about infrared levels, ordinary.

Place the spirit level on a flat plate (or machine rail) with a stable foundation and roughly level, and after the bubbles are stable, read at one end as the left end, and set it to zero. Then turn the level 180 degrees, still put it in the original position of the plate, after the bubble is stable, still read at the original end (left end), read out a grid, then the level zero is an error of half a grid. If the zero error exceeds the allowable range, it is necessary to adjust the zero adjustment mechanism of the level, adjust the screw or nut, and reduce the zero error to the allowable value.

For screws and nuts that are not adjusted according to the regulations, they shall not be twisted at will. Before adjustment, the working surface and the plate of the level must be wiped clean, and the screws or nuts and other parts must be tightened after adjustment.

Here's how:Operating tool: opporeno6pro

Operating system: Funtouch OS

Software: Camera.

1. Turn on the opporeno6pro [camera] function.

2. Enter the camera photo interface - click the settings icon in the upper right corner.

3. Enter the [Settings] page - select the [Composition] option.

4. Enter the [Composition] page - turn on the switch button on the right side of the [level].