ISO 3071-2020 pdf free download.Textiles一Determination ofpH of aqueous extract.
6 Apparatus
6.1 Stoppered glass or polypropylene flasks, chemically resistant, for preparation of the aqueous extract.
It is recommended that the glassware used for this test be set aside for this purpose only.
6.2 Mechanical shaker, providing rotational or reciprocating movement sufficient to obtain a ready exchange of liquid between the interior of the textile material and the solution used in preparing the extract. A to-and-fro movement at a rate of 60 r/min or a rotational frequency of 30 r/min has been found satisfactory.
6.3 Beakers, chemically resistant, with a capacity of 150 ml (see 6Jj.
6.4 Rods, chemically resistant (see J.).
6.5 pH-meter. with a glass electrode, with a resolution of at least 0.01 pH-units. A pH-meter with temperature compensation is recommended.
6.6 Balance, with a resolution of at least 0,01 g.
6.7 1 I volumetric flasks, of grade A quality.
7 Preparation of test specimens
Take a laboratory test sample representative of the bulk of the textile material and sufficient to provide all the test specimens required. Cut the laboratory test sample into pieces having approximately 5 mm sides or of such a size as to allow the test specimens to wet out rapidly.
To avoid contamination, handle the material as little as possible. Take from the laboratory test sample two test specimens of (2,00 ± 0,05) g each.
8 Procedure
8.1 Preparation of the aqueous extract
Prepare the extract of each test specimen at room temperature as follows.
Place each test specimen and 100 ml of extracting solution Ipotassium chloride solution (5.2)I into a stoppered flask (f.1). Agitate the flask for a short period by hand to ensure that the textile material is properly wetted out, then shake it mechanically (62) for 2 h ± 5 mm.
8.2 Measurement of the pH of the aqueous extract Record the temperature o the extracting solution used.
Calibrate the pH-meter, according to the manufacturer instructions, at the temperature of the extract to be measured. Check the calibration of the pH-meter using two buffer solutions.ISO 3071 pdf download.
Tags: Textiles
-
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…