Abstract: A hardness tester having an image capturer capturing an indentation image, a data memory, an automatic size-scanning program scanning an indentation size, and a hardness calculation program includes: an identification information providing program providing image data with test specimen identification information and indentation identification information; a memory control program having the image data associated with the identification information stored; a specifying program specifying, when a scanning error occurs, identification information of image data in which the scanning error has occurred; an obtaining program obtaining the image data from the data memory based on the specified identification information; and a re-scanner (a display, an operator, and a manual size-calculation program) re-scanning an indentation size from the obtained image data.

Abstract: A hardness tester enabling a user to form an indentation in a desired test position, capable of performing an accurate hardness test even when center positions of an indenter and a field lens are offset. The hardness tester includes an XY stage displacing a sample stage in a horizontal direction; a CCD camera capturing images of a sample surface via a field lens; a monitor displaying the images; a turret capable of selectively positioning the indenter or the field lens in a predetermined position opposite the sample; a memory storing an amount of horizontal direction offset between the center positions of the indenter and the field lens when positioned in the predetermined position; and a CPU displaying, based on the amount of offset stored in the memory, a mark indicating the center position of the indenter on the monitor when the field lens is positioned in the predetermined position.

Abstract: A hardness tester capable of facilitating positioning of a sample even when the hardness tester includes a manual XY stage. The hardness tester includes an XY stage displacing a sample stage in a horizontal direction; a CCD camera capturing an image of a sample surface via an objective lens; a monitor displaying the image of the sample surface captured by the CCD camera; an operator specifying a test position at which an indentation is to be formed, the test position being specified on the image displayed on the display; and a CPU calculating, in conjunction with displacement of the XY stage, an amount of offset in the XY direction between the test position and a center position of the indenter when forming the indentation, then displaying the calculated amount of offset on the display.

Abstract: A hardness testing apparatus has an indenter shaft having an indenter at a top thereof, a force motor for moving the indenter shaft in its axial direction and applying a predetermined test force to a sample through the indenter, an external force detection section for detecting an external force applied from outside of the hardness testing apparatus to the indenter shaft when the indenter shaft is moved by the force motor, and an external force adjustment and control section for controlling the force motor to apply the predetermined test force to the sample while deadening the external force detected by the external force detection section.

Abstract: A hardness testing apparatus has an indenter shaft having an indenter at a top thereof, a force motor for moving the indenter shaft in its axial direction and applying a predetermined test force to a sample through the indenter, an external force detection section for detecting an external force applied from outside of the hardness testing apparatus to the indenter shaft when the indenter shaft is moved by the force motor, and an external force adjustment and control section for controlling the force motor to apply the predetermined test force to the sample while deadening the external force detected by the external force detection section.

Abstract: A hardness testing apparatus has an indenter shaft having an indenter at a top thereof, a force motor for moving the indenter shaft in its axial direction and applying a predetermined test force to a sample through the indenter, an external force detection section for detecting an external force applied from outside of the hardness testing apparatus to the indenter shaft when the indenter shaft is moved by the force motor, and an external force adjustment and control section for controlling the force motor to apply the predetermined test force to the sample while deadening the external force detected by the external force detection section.

Abstract: A hardness testing apparatus has an indenter shaft having an indenter at a top thereof, a force motor for moving the indenter shaft in its axial direction and applying a predetermined test force to a sample through the indenter, an external force detection section for detecting an external force applied from outside of the hardness testing apparatus to the indenter shaft when the indenter shaft is moved by the force motor, and an external force adjustment and control section for controlling the force motor to apply the predetermined test force to the sample while deadening the external force detected by the external force detection section.

Abstract: A method for calibrating an apparatus for calibrating a hardness tester, the method comprising the steps of: setting a plurality of calibration points between a rated force point at which a rated force of a force measuring member is applied and a zero point at which no-load is applied, for measuring outputs (mV/V) from the force measuring member according to test forces(N) applied to the force measuring member; and calculating a relation between the test forces(N) and the outputs(mV/V) as an approximation based on the test forces(N) and the outputs(mV/V) according to the test forces(N) at the calibration points. An apparatus for evaluating a dynamic characteristic of a specimen, which installed in a hardness tester, the apparatus comprising: a force measuring member; a force transmitting portion which is movable up and down; a distance measuring member incorporated in the force transmitting portion to be contacted with the force measuring member from above; and an indenter.