1, the installation and use of the instrument, to check the comprehensiveness of the surrounding environment, power supply, voltage, light bulb, grounding wire, etc. Is correct and firm, should meet the requirements.

2. Inspection of the movement performance of the main parts of the instrument: the workbench, longitudinal and transverse slide rails, micrometer, microscope arm rail lifting, angle dial rotation and other parts of the instrument must be confirmed by visual observation and manual test that the structure is installed reliably, the position is accurate, the running performance should be comfortable and intact, and there is no looseness, blockage and jerkiness.

3. Inspection of angle measuring eyepiece
A. Check the zero position of the angle measuring eyepiece: When the angle measuring microscope is at zero position, the horizontal line of the miter reticle of the angle measuring eyepiece should be parallel to the moving direction of the X-axis slide plate, and the deviation should not be greater than 6 points.
Inspection method: put the square ruler of the knife edge on the instrument workbench, lift the microscope, and present a clear knife edge image in the field of view of the eyepiece. Adjust the workbench so that the image of the right-angle long-side knife edge is parallel to the moving direction of the X-axis slide plate, rotate the miter reticle so that its horizontal line is parallel to the image of the right-angle long-side knife edge, observe whether the indication value of the microscope angle dial is zero, and read out its deviation. The deviation should be no more than 6 points.

4. Check the verticality of the microscope boom along the column guide rail direction and the workbench surface.