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The paper informs about the process of development and testing of dynamic cone penetration test semi-automatic data recorder. Dynamic probing is widely used in-situ testing procedure. The test principle is to drive a rod with a cone tip on its end into a soil by a ram. During the test an operator records the number of blow count and value of torque moment evaluating the soil lateral friction with rods. Keeping the handwritten record during test is a concentration demanding process providing large room for human er...