Acoustics — Determination of sound absorption coefficient and impedance in impedance tubes — Part 2:...
This test method covers the use of an impedance tube, two microphone locations and a digital frequency analysis system for the determination of the sound absorption coefficient of sound absorbers for normal sound incidence. It can also be applied for the determination of the acoustical surface impedance or surface admittance of sound absorbing materials. Since the impedance ratios of a sound…
Information technology - Fibre distributed data interface (FDDI) - Part 25: Abstract test suite for ...
The Station Management (SMT) Abstract Test Suite (ATS) directly supports the FDDI Protocol Implementation Conformance Statement (PICS) Proforma and works in correlation with three other FDDI ATS standards. This ATS for FDDI SMT provides the test procedures and test cases required to test the station management protocol described in the SMT standards. SMT specified the local portion of the system…
Low-voltage switchgear and controlgear - Part 1: General rules
Applies, when required by the relevant product standard, to switchgear and controlgear hereinafter referred to as "equipment" and intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c. It states those general rules and requirements which are common to low-voltage equipment as defined in Subclause 1.1, including for example:…
Information technology -Telecommunications and information exchange between systems - Private Integ...
This International Standard specifies the additional network feature Common Information (ANF-CMN), which is applicable to various basic services supported by Private Integrated Services Networks (PISN). Basic services are specified in ISO/IEC 11574.
ANF-CMN is an additional network feature which enables the exchange of Common Information between entities acting on behalf of the two ends of a…
Information technology —Telecommunications and information exchange between systems — Private Integ...
This International Standard specifies the additional network feature Common Information (ANF-CMN), which is applicable to various basic services supported by Private Integrated Services Networks (PISN). Basic services are specified in ISO/IEC 11574.
ANF-CMN is an additional network feature which enables the exchange of Common Information between entities acting on behalf of the two ends of a…
Performances énergétiques des ventilateurs de plafond
1. Domaine d'application
1.1
Cette norme s'applique aux ventilateurs de plafond devant être connectés à des
circuits d'alimentation dont la tension ne dépasse pas 250 V.
1.2
Cette norme énonce les exigences de performances énergétiques s'appliquant aux
ventilateurs de plafond suspendus et au ras du plafond, conçus pour des
utilisations domestiques, commerciales et…
1. Scope
1.1
This Standard describes the design, construction, load rating, installation,
erection, inspection, maintenance, repair, modification, test, and operation of
lattice and telescopic boom mobile cranes.
1.2
This Standard applies only to machines that have all of the following
fundamental characteristics:
(a) the crane comprises, or is mounted on, a non- or self-propelled,…
