Theodolite T30 - trace the evolution of optical devices

Theodolite T30 and other models - what is this device?

What all are the work of a theodolite and what requirements it must meet?The measuring principle of the angle is to compare the object under study with the point whose coordinates are known are known.The observation hole has a scale on it and checked against these values.Different brands theodolites have some differences in the organization of device and scales, but in general the principle of all is one.

models of this device are divided into three major classes: highly accurate, precise and technical.The latter are the least accurate, the device theodolite T30 and its modifications just carries this product in this class.However, this classification does not allow such devices do not meet the basic requirements of standardization, which we will briefly describe, not to go into the details of the structure:

• must be maintained perpendicular to the axis of rotation aliady its axis horizontal circle;
• one strand of the common grid should occupy a vertical plane;
• needed telescope perpendicular axis and the line of sight;
• aliada telescope and the axis of rotation must also be at an angle of 90 degrees.

Stamps theodolites - how to understand what we buy?

If you have ever participated in the selection of a theodolite, you've probably seen a lot of models in indicating incomprehensible numbers and letters, but they all have value.Directly letter "T" in the title informs us that we are dealing with a theodolite.The number after the letter indicates the accuracy class, namely, the error in minutes: T1 - high precision (error of up to ± 1 ") T2-5 - accurate, T15-60 - technical.

are popular in modern construction sites theodolites T5 and T30, depending on the scope and budget of the project as a whole.

figure before the letter "T" stands for a generation of the instrument: the higher the number, the newer generation.There are also letters and after the T, they can tell us about the extra features of the model (M, P, K, A, E).The most common demand of K - compensator, P - direct vision (a special unit of the telescope), E - electronic devices.

Now let's try to decipher, for example, how to read a theodolite 4t30p .This 4th generation device class technical accuracy with an error of 30 minutes, the telescope is equipped with a direct vision.If this point to clarify, you should apply directly to the characteristics of the various instruments.

Theodolite 4t30p compare with a line of other proposals

Model T30 their subsequent modifications (including 4t30p) characterized the reference system.If the first generation of the bar is used the principle of the microscope, it is already in the second generation and above (2T30, 3T, 4T), this system is the dial type.This microscope is equipped with a system and a theodolite 2T5K , already belongs to the class of precision.

Comparing Collimator third generation device such as a theodolite 3t5kp and 3T2KP, it should be noted that their performance will actually be the same except for the angle measurement error.The difference in numbers after the letters "T" discussed above, in the first case it will be an average of 5 minutes, that's theodolite 3T2KP will be wrong only 2 minutes maximum.

Precision theodolites will affect the complexity of verification, but at the same time creates a sense of excellence calculations already on site.Besides the obvious options that are specified in the device labeling, with growth rising generation device are still some options, such as an increase.At T30 increase is assumed to be x18, but already at the 2T30, it will be x20.