Tag: Instrumentation-and-measurement

1139-1999

Affects all documents dealing with the reporting or specification of time and frequency measurements and instrumentation.

IEEE/IEC 61588-2021

In this standard, a protocol is defined that provides precise synchronization of clocks in packet-based networked systems. Synchronization of clocks can be achieved in heterogeneous systems that include clocks of different inherent precision, resolution, and stability. The protocol supports synchronization accuracy and precision in the sub-microsecond range with minimal network and local computing resources. Customization is supported by means of profiles. The protocol includes default profiles that permit simple systems to be installed and operated without the need for user management. Sub-nanosecond time transfer accuracy can be achieved in a properly designed network.

IEEE 287.1-2021

This IEEE P287 series of documents presents the combined efforts of IEEE P287 Working Group that reflect the knowledge and experience of leading specialists in the development and measurement of precision coaxial connectors for RF, microwave and millimeter-wave frequencies. It presents minimum performance requirements to standardize both hermaphroditic and pin- and socket-type connectors (IEEE Std. P287.1-D11/10/2021, this document). It provides recommended electrical and mechanical test procedures for Instrument Grade and Metrology Grade precision connectors (IEEE Std. P287.2-D10/09/2021). Recommended reference procedures including connector effects, connector care and cleaning, connector repeatability and reproducibility test procedures, and a color code for connectors are…

IEEE 1865-2019

The technical and managerial requirements for operational maintenance, repair, and tests of distributed control systems (DCSs) in power stations are specified. This standard is applicable to the operational maintenance, repair, and tests of DCSs in conventional thermal power stations after commencement of commercial operation.

IEEE 1865.1-2019

The basic principles, items, methods, performance indicators, and acceptance requirements for the maintenance and testing of distributed control systems (DCSs) of thermal power plants are specified. This standard is mainly applicable to the maintenance and testing of DCSs of conventional thermal power plants in commercial operation.

IEEE 1865.2-2019

The basic principles, items, methods, performance indicators, and acceptance requirements for the maintenance and testing of the distributed control systems (DCSs) of thermal power plants are specified. This standard is mainly applicable to the maintenance and testing of DCSs of conventional thermal power plants in commercial operation.

IEEE/ANSI 91a-1991

Graphic symbols for representing logic functions or physical devices capable of carrying out logic functions are presented. Descriptions of logic functions, the graphic representation of these functions, and examples of their applications are provided. The symbols are presented in the context of electrical applications, but most may also be applied to nonelectrical systems (for example, pneumatic, hydraulic, or mechanical). The supplement provided additional internationally approved graphic symbols and made corrections as needed to IEEE Std 91-1984.

IEEE 280-2021

Letter symbols to represent various quantities used in electrical science and technology are presented in this standard.

IEEE 1541-2021

Names and letter symbols for prefixes that denote multiplication of a unit by the binary multiplier 2 10n, where n = 1, 2, 3, 4, 5, 6, 7, or 8 are defined. Although the prefixes may be used with all units in all fields where multiplication by a binary multiplier is found to be appropriate, their primary use is in the field of information technology.
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