ISO 6507-3-2018 pdf free.Metallic materials – Vickers hardness test – Part 3: Calibration of reference blocks.
The reference blocks shall be free of magnetism . It is recommended that the manufacturer shall ensure
that the blocks , if made of steel , have been demagnetized at the end of the manufacturing process
( before calibration )
4.5 Flatness and parallelism
The maximum deviation in flatness of the test and support surfaces shall not exceed 0,005 mm . Th
maximum error in parallelism shall not exceed 0,010 mm in 50 mm .
1.6 Surface roughness
The test surface shall be free from scratches that interfere with the measurement of the indentations
The test surface roughness , Ra , shall not exceed 0,05 um . l ] The bottom support surface shall be a finely
ground finish or better
4.7 Prevention of the regrind of the test surface
To verify that no material has been subsequently removed from the reference block , its thickness at
the time of calibration shall be marked on the reference block to the nearest 0 , 01 mm or an identifying
mark shall be made on the test surface [ see Clause 9 e ) ]
5 Calibration machine
In addition to fulfilling the general requirements specified in 1S0 6507-2 , the calibration machine shal
also meet the requirements given in 5 . 2 to 5.6 ,
NOTE The criteria specified in this document for the performance of the calibration machine have been
needs to meet , the uncertaint nificant period of time , When determining a specific tolerance that the machine
associated with the use of measuring equipment and / or reference standards ha
been incorporated within this tolerance and it would therefore be inappropriate to make any further allowance
for this uncertainty by , for example , reducing the tolerance by the measurement uncertainty . This applies to all
measurements made when performing a direct verification of the calibration machine .
5.2 Direct verification
The calibration machine shall be verified directly at intervals not exceeding 12 months .
Direct verification involves
a ) verification of the test force
b ) verification of the indenter ,
c ) calibration and verification of the diagonal measuring system
Each test force shall be verified at three different positions of the plunger, spaced at approximately equal increments covering the limits of travel used during testing. At each position, the force shall be measured three times using an elastic proving device according to ISO 376, class 0,5 or better or by another method having the same or better accuracy. Each measurement shall agree with the nominal value to within +0,2 % for normal hardness, to within +0,3 % for low-force hardness and to within +0,5 % for microhardness.
5.5 Indenter
The indenter shall comply with ISO 6507-2 and meet the following requirements.
a) The four faces of the square-based diamond pyramid shall be highly polished, free from surface defects and flat within 0,000 3 mm.
b) The angle between the opposite faces of the vertex of the diamond pyramid shall be 136°0,19.
c 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 0,3°.
d) The point of the diamond indenter shall be examined with a high-power measuring microscope or preferably with an interference microscope. If the four faces do not meet at a point, the line of junction, as described in IS0 6507-2, between opposite faces shall comply with the values in Table 1.ISO 6507-3 pdf download.
Tags: Metallic materials
-
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…
-
ISO 15688-2012 pdf free download.Road construction and maintenance equipment – Soil stabilizers 一 Terminology and commercial specifications. This International Standard establishes the terminology, definitions of operation and commercial specifications for soil stabilizers and their components intended for use in road construction and pavement works. It does not apply to soil stabilizers used in agricultural applications. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.. ISO 3911, Wheels and rims for pneumatic tyres — Vocabulary, designation and marking ISO 6746-1, Earth-moving machinery — Definitions of dimensions and codes — Part 1: Base machine ISO 6746-2, Earth-moving machinery — Definitions of dimensions and codes — Part 2: Equipment and attachments ISO 7134. Earth-moving machinery — Graders — Terminology and commercial specifications 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 soil stabilizer self-propelled machine, either towed or transported, with the function of pulverizing, breaking-up, aerating, homogenizing, and loosening existing and imported soil or paving materials and mixing them…
-
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…
