What information is displayed in the notification from the digital Rockwell hardness counter code display?

(1) Periodically inject a small amount of oil into the contact surface of the screw and handwheel.
(2) Before using the digital Rockwell hardness tester, the top surface of the screw, the working level table, and the end faces should be wiped clean.
(3) Regularly check the precision of the hardness tester with standard hardness blocks; testing on the support surface is strictly prohibited.
(4) When the standard hardness block has burrs, use an oilstone to grind the supporting surface. At different testing positions, the block should be dragged across the table and should not be removed from the working surface.

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