S: S100 Bus Shock Wave

S100 bus

A standard board and bus system used by hobbyists and small business users that has become a de facto standard for microcomputers. The S100 bus uses 100 pins.

SA

Standards Australia (Australia). A certification laboratory for testing the equipment of different vendors to some common standard.

SAA

System Application Architecture; Standards Association of Australia (IEC). A set of standards developed by IBM that provides identical user interfaces for applications that are running on PCs, minicomputers, and mainframes.

sabin

A unit of measure for sound absorption that is equivalent to one square foot of a perfectly absorptive surface.

saddle

A casting, fabricated chair, or member that is used to provide support.

safe area

[ISA-12.01.01 1999] 2. An area in which an explosive gas/air mixture is not expected to be present so that special precautions for the construction and use of electrical apparatuses are not required.

See also nonhazardous (unclassified) location.

safe state

A state that a process or equipment under attain when they comply with the safety requirements of a Process Hazards Analysis (PHA). [ANSI/ISA-84.01 1996]

safety availability

The fraction of time in which a safety system is able to perform its designated safety service when a process is operating. In the ANSI/ISA-84.01 1996 standard, the average probability of failure on demand (PFDavg) is the preferred term. (PFD equals 1 minus Safety Availability). [ANSI/ISA-84.01 1996]

See also probability of failure on demand (PFD).

safety can

A metal can with a special closure that is used for storing, handling, and...