The purpose of the laser rangefinder calibration is to clarify the characteristics of the device and determine the conformity of its real working readings stated in the passport. Laser range finders give much more accurate and correct readings compared to traditional tape measures, which are gradually being forced out of use.
Laser range finders are designed for quick and accurate measurements, but the instrument must be calibrated before use.
Laser-type range finders are high-tech measuring instruments, therefore they are subject to the verification procedure. The metrological parameters of any new device that is planned to be used on the territory of our country for carrying out measuring work require monitoring. This provision is fixed by law.
A primary check is obligatory for all devices that are included in the state register of measuring instruments. In the course of work, it is sometimes necessary to clarify the technical characteristics of the “laser tape measure” and its suitability for further use. In this case, you can additionally carry out a calibration or, if the range finder (for domestic use) is not included in the state register, calibration. It differs from the calibration procedure in that it is performed on a voluntary basis. Calibration includes the same operations that the metrological service performed during the initial inspection. Calibration can be carried out by any company operating in this field, and verification is monitored and carried out by the State Metrology Service.
Testing procedure: stages, methods
Scheme of verification of a laser range finder.
Laser range finder check is performed in several stages. The first includes an inspection of the external state of the device. The next stage is testing. The third step is characteristic only for the initial calibration. His goal is to control the parameters of the metrological plan. The task of the fourth stage is to determine the laser wavelength, beam diameter and its power. This procedure is also included only in the primary calibration. The last stage is the determination of the error.
When checking the accuracy used 2 methods. The first is to conduct operations to monitor the state of the measuring device in the laboratory, where the pulse energy, its peak power, and frequency are checked. Design features, accuracy of measurements, beam divergence, discrimination distance, receiver sensitivity are also determined. As a result, errors and errors are sighted.
The second method is based on checking the instrument in the “field conditions” mode when the attenuation coefficient is set. The purpose of the method is to obtain accurate information about the range of laser rangefinders.
At home, it is impossible to test this rangefinder.
To do this, you need to contact specialized companies that, based on standards and technical documentation, will conduct both calibration and calibration of devices. As a result of the work carried out, a certificate must be issued to the customer, where all metrological parameters should be indicated.