ISO 8769:2016 pdf free download.Reference sources Calibration of surface contamination monitors Alpha-, beta- and photon emitters
Sources (le reference — Etulonnuge des contrôleurs (le contuminution (le suifuce — Emetteurs alpha, beta et photoniques.
The uniformity of a Class 1 reference source minus its relative standard uncertainty shall he greater than 90 %. For the purpose of specifying the uniformity of a source with respect to surface emission rate per area, the source shall be considered as comprising a numbei’ of portions of equal area and shape. For rectangular sources, the shape of the portions shall he identical to the shape of the active area of the source.
The area of the portions shall he 10 cm2 or less. For the recommended sizes (see 5.2.1), a reference source active area ot 10 cm x 10 cm shall he divided into 16 quadratic portions and a source of 10 cm x 15 cm shall be divided into 16 rectangular portions.
The individual emission rates shall be determined with a relative uncertainty that shall be consistent with that specified for the whole sout-ce in 52.2 and 53..2. These uncertainties shall be taken into account when calculating the expei’imental standard deviation to determine the uniformity resulting in an uncertainty for the uniformity itself (see Reference [12]).
Uniformity may be measured by using the image plate technique, position sensitive measurement systems, or by inserting a masking plate between the source and the detector. The masking device shall have an aperture of appropriate size and provide sufficient shielding of the detector. For the masking plate technique, care should he taken to always use the same portion oithe detector to minimize effects due to possible non—uni lormity of response to radiation across the surface of the detector. For the other techniques, care should be taken to minimize effects clue to possible non—uniformity of the detection efficiency across the whole detector.
In those situations where the detector windov area is less than the active source area, it is possible to avoid the requirement to have a detailed knowledge of the uniformity by characterizing, in an integral manner, the emission rate from that part of the source that is exposed to the detector window.ISO 8769:2016 pdf free download.
Tags: Reference sources
-
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…