ISA 51.1 : 1979

1 Purpose
2 Scope
3 Introduction
  3.1 Italicized terms
  3.2 Introductory notes
  3.3 Operating conditions vs. performance
  3.4 Sources and references
4 Definitions of terms
5 Test procedures
  5.1 Scope and purpose
  5.2 Introduction
  5.3 Calibration cycle
  5.4 Calibration curve
  5.5 Test procedures
6 References

Covers many specialized terms used in the industrial process industries, to describe the use, performance, hardware, operating influences, and product qualification of instrumentation and instrument systems used for measuring, control, or both. There are a number of definitions and terms which relate to performance tests and environmental influences (operating conditions) as further outlined in the Introductory Notes. This document is guidance for vendor/user understanding when referring to product specifications, performance, and operating conditions. Process industries include petroleum, chemical, air conditioning, power generation, food, paper, metallurgical, textile and various other industries. Terms are suited for use by those involved in all activities relating to process instrumentation.