When installing a hydraulic universal testing machine, how to check whether the body is not vertical?

Hydraulic universal testing machineCheck the main body part and the force measuring mechanism part respectively. Main body part: Remove the outer cover of the working oil cylinder, raise the working piston, and use a box level with an accuracy of no less than 0.1/1000 to measure the leveling degree of the oil cylinder in two directions perpendicular to each other. If it is not horizontal, add a shim under the base to adjust.
Force measuring mechanism: Align (1) swing rod with fixed marks and try to fix them. But pay attention to whether the swing rod is bent. (2) Check the non-perpendicularity in the front and rear directions under the swing rod. Check the non-perpendicularity of the left and right directions of the force measuring machine on the upper side of the swing rod

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