ISO 6507-2-2018 pdf free.Metallic materials一Vickers hardness test一 Part 2: Verification and calibration of testing machines.
5.1.1 Direct verification shall be conducted in accordance with the schedule given in Clausel.
5.1.2 Direct verification involves:
a) calibration of the test force;
b) verification of the indenter;
c) calibration and verification of the diagonal measuring system;
d) verification of the testing cycle.
5.1.3 Direct verification should be carried out at a temperature of (23 ± 5) °C. If the verification is made outside this temperature range, this shall be stated in the verification report.
5.1.4 The instruments used for verification and calibration shall be traceable to national standards.
5.2 Calibration of the test force
5.2.1 Each test force used within the working range of the testing machine shall be measured. Whenever the indenter position affects the applied force, this shall be done at not less than three positions of the plunger uniformly spaced throughout its range of movement during testing.
For testing machines whose test force is shown not to he influenced by the position of the plunger, e.g. closed-loop controlled loading system, the test force can be calibrated in one position.
5.2.2 The test force shall be measured by one of the following methods:
— by means of an elastic proving device in accordance with ISO 376, class 1 or better;
— by balancing against a force, accurate to ±0.2 %, applied by means of calibrated masses or another method with the same accuracy.
Evidence should be available to demonstrate that the output of the force-proving device does not vary by more than 0,2 % in the period of 1 s to 30 s following a stepped change in force.
5.2.3 Three readings shall be taken for each test force, F, at each position of the plunger. Immediately before each reading is taken, the indenter shall be moved in the same direction as during testing. AIll readings shall be within the maximum permissible percent relative error, OFrel, defined in Table 1.
5.3.1 The four faces of the square-based diamond pyramid shall be polished and free from surface defects.
5.3.2 The verification of the shape of the indenter can be made by direct measurement or optical measurement. The device used for the verification shall have a maximum expanded uncertainty of 0,07°.
5.3.3 The measured angles between the opposite faces at the vertex of the diamond pyramid shall be within the range 136° ± 0,5° (see Figure 1).
The angles between the opposite faces may also be verified by measuring the angle between the opposite edges. To meet the requirements, the angles between the opposite edges shall be 148,11° ± 0,76°.
5.3.4 The angle between the axis of the diamond pyramid and the axis of the indenter-holder (normal to the seating surface) shall be less than 0,5°.
5.3.5 The four faces should ideally meet at a common point, however, there is usually a line of junction, a, between opposite faces as shown in Figure 2. The length of the line of junction shall be determined by directly measuring the indenter tip or by measuring the tip impression in an indentation. The maximum permissible length of the line of junction between opposite faces is given in Table 2.ISO 6507-2 pdf download.
Tags: Metallic materials
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ISO 8600-1-2013 pdf free download.Endoscopes – Medical endoscopes and endotherapy devices – Part 1: General requirements. 6 Marking 6.1 Minimum marking Iach individual endoscope or endotherapy device shall have the lollowing minimum marking: a) model number and/or other mark sufficient to identify the endoscope or endotherapy device and its manufacturer; b) maximum insertion portion width, minimum instrument channel width, working length, field of view and/or direction of view where such identification is necessary for the intended use of the endoscope or endotherapy device. The Insertion portion width and instrument channel width units shall be in millimetres. The insertion portion width and instrument channel width can also be marked in French size as defined in 3.5, shown by either ‘Fr or an encircled number; c) wherever reasonable and practicable. the endoscope or endotherapy device and detachable component(s) shall be identified in terms of lot numbers or serial numbers, etc. 6.2 Marking legibility The marking shall remain legible over the lifetime of the device when the endoscope or endotherapy device is used, cleaned, disinlected, sterilized and stored in accordance with the instruction manual. 6.3 Marking exceptions When marking on the endoscope or endotherapy device or detachable component(s) is impossible to achieve due…
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ISO 18436-1-2012 pdf free.Condition monitoring and diagnostics of machines – Requirements for qualification and assessment of personnel一 Part 1: Requirements for assessment bodies and the assessment process. 5 Requirements for assessment body personnel 5.1 General provisions In order to ensure that the assessment process is carried out effectively and uniformly, the competence requirements for personnel involved in the entire process shall be defined by the assessment body and, in the case of a third party, be approved by the responsible TCC (in accordance with ISO/IEC 17024). The assessment body shall require its personnel (internal or external) to sign a contract, or other document, by which they commit themselves to comply with the rules defined by the assessment body, including those relating to confidentiality and those relating to independence from commercial and other interests, and from any prior or present link with the persons to be examined that would, in the opinion of the interested parties, compromise impartiality. Clearly documented instructions shall be available to the personnel, describing their duties and responsibilities. These instructions shall be maintained up to date. All personnel involved in any aspect of assessment activities shall possess appropriate educational qualifications, experience and technical expertise, which satisfy defined…