Theodolite level calibration device

Product Introduction:

Theodolite level calibration deviceIt is convenient to calibrate, test, and repair optical and electronic theodolites indoors, such as detecting the horizontal angle measurement error of the theodolite, the coaxiality error of the optical centering device's visual axis and vertical axis, and the geometric relationship between the telescope's visual axis, horizontal axis, and vertical axis. It also detects the focusing operation error of the telescope, especially solving the detection of the vertical plate measurement error of the theodolite, so that it can be tested and verified according to the items in the National Metrology Verification Regulations for Theodolites (JJG414-2003). This instrument can also verify and calibrate items such as the I-angle, vertical axis rotation accuracy, and cross error of the level.

Working Principle:

Theodolite level calibration deviceIt consists of a vertical multi tooth indexing table, a horizontal multi tooth indexing joint, a calibration tube, a self collimating light tube (used as a parallel light tube), and an instrument base. The self collimating light tube has a marking plate on the focal plane, and through the rotation of the vertical multi tooth indexing table, it forms an infinite horizontal target at any angle together with the parallel light tube. Similarly, through the rotation of the horizontal multi tooth indexing table, it can also form an infinite vertical target at any angle. Therefore, it can easily simulate various situations and calibrate the instrument.

Performance characteristics:

1. The horizontal multi tooth indexing table and parallel light tube are used to complete the calibration of various items of the theodolite and level, especially to calibrate the entire range of the vertical disc that can be used for the theodolite. It is currently the most reliable device in China that can provide the true value of vertical angles.

2. The multi tooth indexing table is used as the angle standard for this instrument, making the traceability of instrument values simple. The instrument only requires a universal instrument (polyhedral prism, autocollimator) and the commonly used full combination permutation comparison method in angle measurement to calibrate the uncertainty of the instrument. The calibration is carried out in working condition, and the instrument state is not changed after calibration, ensuring accurate and reliable traceability.

3. The instrument has a self calibration function. When detecting the i-angle of the level, the standard angle can be calibrated at any time. Once it is inaccurate, it can be detected at any time and adjusted conveniently.

4. During the verification and calibration process of the theodolite, it can be directly calibrated and repaired on the workbench without having to disassemble and assemble every time, saving work time.

5. No need for foundation, compact structure, and small footprint.

Testing content:

1. Theodolite:

(1) Adjustment of the visual axis height of the inspected theodolite;

（2）Verification of the perpendicularity between the level axis and the vertical axis;

（3）Verification of the correctness of rotation of the reference section;

（4）Verification of the verticality of the vertical wire on the telescope reticle;

（5）Calibration of optical micrometer deviation;

（6）Verification of gap deviation of optical micrometer;

（7）Verification of the perpendicularity between the visual axis and the horizontal axis;

（8）Verification of the perpendicularity between the horizontal and vertical axes;

（9）Verification of vertical disc index deviation;

（10）Calibration of telescope focusing operation error;

（11）Calibration of eccentricity deviation of the reference section and eccentricity deviation of the level dial;

（12）Verification of coaxiality between the visual axis and vertical axis of optical centering devices;

（13）Verification of automatic compensation error for vertical disk indicators;

（14）Verification of the standard deviation in the horizontal direction and the error in angle measurement indication;

（15）Verification of the standard deviation of the vertical angle and the error of the angle measurement indication.

2. Level gauge

（1）Vertical axis operation error and vertical axis setting error;

（2）The perpendicularity between the horizontal wire and the vertical axis of the telescope reticle;

（3）The parallelism (cross error) of the projection of the telescope's visual axis and the axis of the tubular level bubble in the horizontal plane;

（4）Sight line error (i angle);

（5）Telescope focusing operation error.

Technical Indicators:

1. The indication error of the horizontal angle standard is ≤ 0.3 ″;

2. The comprehensive indication error of the vertical angle standard is ≤ 1 ″;

3. There are 0.6m and 1.5m centering partitions in the optical system, with equivalent grid values of 2mm;

4. The working height is approximately 1200mm, which means the height of the horizontal multi tooth indexing table axis from the ground;

5. Instrument worktable lifting range: 0-300mm;

6. Fixed center screw specifications: M16 and British 5/8 inches;

7. Lighting bulb specification: 6.3V/2.1W;

8. Parallel light tube focal length: f=550mm, relative aperture 1:10;

9. Dimensions: 1060 × 920 × 1400mm.

Accuracy index: