First, the main part is the host
In the main machine part, due to the installation is not horizontal, friction will occur between the working piston and the cylinder wall, resulting in errors. Normally shows a positive difference, and as the load increases, the resulting error becomes smaller.
Second, the dynamometer part
When the dynamometer part is not installed horizontally, it will cause friction between the bearings of the pendulum shaft, which is generally realized as a negative difference.
The above two kinds of errors have a greater impact on the measurement of small loads, and have less influence on the measurement of large loads.
Solution:
1, first check the installation of the test machine is level, the mainframe with a horizontal ruler in the horizontal direction of the outer cylinder of the work cylinder (or column) leveling two directions.
2. Adjust the dynamometer to the front and back of the dynamometer on the front of the pendulum rod, align the pendulum rod edge with the inner engraved line, and use the horizontal ruler to rest on the side of the pendulum rod to adjust the level of the body.
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