Courtesy: Permit of Rostechnadzor GOST standards and technical specifications The abbreviation GOST (rus) (SUST) (eng) stands for the State Union Standard. From its name we learn that most of the GOST standards of the Russian Federation came from the Soviet Union period. Creation and promotion of the Union Standards began in 1918 after introduction of […]
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Courtesy: Permit of Rostechnadzor The Federal Service for Environmental, Technological and Nuclear Supervision (Rostekhnadzor; Russian: Федеральная служба по экологическому, технологическому и атомному надзору (Ростехнадзор)) is the supervisory body of the Government of Russia on ecological, technological, and nuclear issues. Its functions include the passage of regulatory legal acts, supervision and oversight in the field of environmental protection, limiting harmful technogenic impact (including the handling of industrial and consumer […]
Courtesy: PD ISO/TR 14969:2004 The guidance given in this Technical Report is applicable to the design, development, production,installation and servicing of medical devices of all kinds. It describes concepts and methods that can beconsidered by organizations which are establishing and maintaining quality management systems. Guidance contained in this Technical Report can be useful as background […]
Courtesy: Pattern approval for measuring instruments Military standards Combatants in every branch of the United States’ military are at risk for auditory impairments from steady state or impulse noises. While applying double hearing protection helps prevent auditory damage, it may compromise effectiveness by isolating the user from his or her environment. With hearing protection on, a […]
Courtesy: Pattern approval for measuring instruments Sound level meters Octave filters Personal noise dosimeters Measurement microphones Room acoustics
Courtesy: Pattern approval for measuring instruments eq = equivalent. Equivalent values are a form of time weighting that is easier to read on a display than the instantaneous sound level. If you look at these graphs of sound level over time, the area under the blue curve represents the energy. The horizontal red line drawn to […]
Courtesy: Pattern approval for measuring instruments The second letter indicates the frequency weighting. “Pattern approved” sound level meters typically offer noise measurements with A, C and Z frequency weighting. Z-weighting represents the sound pressure equally at all frequencies. A-weighting, weights lower and higher frequencies much less, and has a slight boost in the mid-range, representing the sensitivity […]
Courtesy: Pattern approval for measuring instruments Personal noise dosimeter A common variant of the sound level meter is a noise dosemeter (dosimeter in American English). However, this is now formally known as a personal sound exposure meter (PSEM) and has its own international standard IEC 61252:1993. A noise dosimeter (American) or noise dosemeter (British) is a specialized sound level meter intended […]
Courtesy: Pattern approval for measuring instruments The usage of an ultrasonic thickness gauge for non-destructive testing to check material properties such as thickness measurement, is regular in all areas of industrial measurements. The ability to gauge thickness measurement without requiring access to both sides of the test piece, offers this technology a multitude of possible […]
Courtesy: Pattern approval for measuring instruments The Measuring Instruments Directive 2014/32/EU (the information is not updated and below this article refers to the old one 2004/22/EC), is a directive by the European Union, which seeks to harmonise many aspects of legal metrology across all member states of the EU. Its most prominent tenet is that all kinds of meters which receive […]