Personal eye-protectors — Filters and eye-protectors against laser radiation
Specifies requirements for spectacle filters and protectors within the spectral region 0,2 to 1000 micron. The work, which was staggered over several years, represents a basic study for which a majority consensus was reached at the international level. To take account of new developments and knowledge relating to lasers a revision of this standard will be undertaken.
The Standard specifies the following characteristics of the oil. Appearance: Clear, mobile liquid. Colour: Pale yellow to pale brownish yellow. Odour: Characteristic of oil of Ceylon citronella. Relative density at 20/20 °C: 0,894 - 0,910. Refractive index at 20 °C: 1,4790 - 1,4870. Optical rotation at 20 °C: Range from - 22 to - 12 . Miscibility with 80 % (V/V) ethanol at 20 °C: 1 : 2. Ester…
Methods for measuring the performance of electric dishwashers
States and defines the characteristics of importance for determining the performance of household electric dishwashers in order to inform the consumer and describes the standard methods for measuring these characteristics.
The contents of the corrigendum of January 1998 have been included in this copy.
Methods of measurement of electro-acoustical characteristis of hearing aids. Part 4: Magnetic field ...
Applies to audio-frequency induction loop systems producing an alternating magnetic field and intended to provide an input signal for hearing aids operating with an induction pick-up coil. Specifies a standard value of magnetic field strength in audio-frequency induction loops for hearing aid purposes, such as will give an adequate signal-to-noise ratio without overloading the hearing aid.
Methods of measurement of performance of vacuum cleaners for household and similar use
States and defines the principal performance characteristics of vacuum cleaners which are of interest to the user and describes the standard methods for measuring these characteristics.