Standards

This Technical Report presents an overview and guidance for the IEC 61158 series. It explains the structure and content of IEC 61158, shows how to use it in combination with IEC 61784, and relates the structures to the ISO/IEC 7498 OSI Basic Reference Model.

IEC 61511-2 provides guidance on the specification design , installation operation and maintenance of safety instrumented functions and related safety instrumented system as defined in IEC 61511-1. This standard has been organized so that each clause and sub clause number herein addresses the same number in IEC 61511-1 (with the exception of the annexes).

This International Standard applies to the generation of electromagnetic energy, from sound and television receivers, for the reception of broadcast and similar transmissions and from associated equipment. The frequency range covered extends from 9 kHz to 400 GHz. No measurement need be performed at frequencies where no limits are specified.

This part of CISPR 16 is designated a basic standard which specifies the characteristics and performance of equipment for the measurement of radio disturbance voltage and currents in the frequency range 9 kHz to GHz. Specifications for the ancillary apparatus are included for artificial mains networks, current and voltage probes and coupling units for current injection on cables. The requirements of this publication shall be complied with at all frequencies and for all levels of radio disturbance voltages and currents within the CISP indication range of equipment. Methods of measurement are covered in Part 2 and further information on radio disturbance is given in Part 3 of CISPR 16.

This part CISPR 16 is designated a basic standard , which specifies the manner in which measurement uncertainty is to be taken in to account in determining compliance with CISPR limits. The material is also relevant to any EMC test when interpretation of the results and conclusions reached will be impacted by the uncertainty of the instrumentation used during the testing . Annex A contains the background material used in proving the amount of measurement uncertainty found in generating the CISPR values shown in Clause 4 and hence provides valuable background material for those needing both initial and further information on measurement uncertainty and how to take into account individual uncertainties in the measurement chain. The annex however is not intended to be a tutorial of user manual or to be copied when making uncertainty calculations. For that, the references shown in the bibliography should be used.

This part of ISO/IEC 9314 specifies the Media access control (MAC) , the middle sublayer of the data link layer (DLL) for fiber distributed data interface (FDDI) .FDDI (ISO/IEC 9314) provides a high -bandwidth (100 Mbit/s).general - purpose interconnection among information processing systems, subsystems and peripheral equipment , using fiber optics or other transmission media. FDDI can be configured to support a sustained data transfer rate of at least 80 Mbit/s (10 Mbytes/s). FDDI provides connectivity for many nodes distributed over distances of many kilometers in extent . Certain default parameter values for FDDDI (e.g. timer settings) are calculated on the basis of up to 1000 transmission links or up to 200 km total fiber path length (typically corresponding to 5000 nodes and 100 km of dual fiber cable, respectively), however, the FDDI protocols can support much larger networks by increasing these parameter values.

This part of ISO/IEC 18026 provides an overview of different techniques of security gateways, of components and of different types of security gateway architectures, it also provides guidlines for selection and configuration of security gateways.

This part of ISO/IEC 20000 defines the requirements for a service provider to deliver managed services of an acceptable quality for its customers

This part of ISO/IEC 20000 represents an industry consensus on quality standards for IT service management processes . These service management processes deliver the best possible service to meet a customer's business needs within agreed resource levels, i.e. Service that is professional cost-effective and with risks which are understood and managed.

This International standard specifies the information to be listed in specification sheets for electrophotograpic digital copying machines and multi-function devices. The intention of this International standard is to allow purchasers and users to compare the characteristics models of copying machines and multi-function devices so that they can more easily select copying machines and multi-function devices that meet their requirements.