Ceramic dielectric disk-style rotary variable pre-set capacitors: Grade 2. Part 1: General requireme...
Describes the tests on capacitors to establish as far as possible under laboratory conditions: their suitability for use over stated ranges of temperature, air pressure and humidity; their ability to withstand specified conditions of mechanical shock such as are to be expected under transit or operational conditions: their
ability to withstand the rigours of normal assembly processes attendant on…
Variable capacitors - Part 1: Terms and methods of test
Describes the tests on capacitors to establish, under laboratory conditions, their suitability for use over stated ranges of temperature, air pressure and humidity, their ability to withstand specified conditions of mechanical shock such as are to be expected under transit or operational conditions, their ability to withstand the rigours of normal assembly processes attendant on their…
Gives requirements and characteristics to specify a hydrophone which is suitable as an IEC Standard Hydrophone for calibration purposes, to be used as a laboratory standard for comparison with other hydrophones intended for daily use.
Aluminium oxide primarily used for the production of aluminium — Sampling
Details the practical requirements for taking representative samples intended for chemical analysis and determination of the physical characteristics. Applicable to products during transport, loading/unloading, contimuous flow and storage. Will be revised when general methods are available. Taking samples is carried out without reduction of particle size by manual or mechanical removal of…
Potassium sulphate for industrial use — Determination of potassium content — Gravimetric method as p...
Dissolution of a test portion taken from the laboratory sample, previosly ground and sifted. Addition of formaldehyde to transform any ammonium ions present into hexamethylenetetramine and of the disodium salt of ethylenediamin tetra-acetic acid to complex any extraneous cations present which could cause excessive errors. These additions have no detrimental effect on the precision or…
Leather — Laboratory samples — Location and identification
Description of test pieces for whole hides and skins, sides and backs, bends (butts), sholders, bellies. Mass, storage and labelling of laboratory samples are given. Method is applicable to all types of leather, derived from mammals and prepared by all types of tannage.
Glycerols for industrial use — Methods of sampling
The procedures are applicable to crude or refined products in the course of filling, or to products already contained in drums or in transportable or fixed tanks. Owing to the heterogeneity of the lots it is recommended to adopt the sampling during filling. Specifies particular precautions in view of the very hygroscopic nature of the product. The principle consists in samplings, at regular…
