I: I In Situ

I

Current or moment of inertia; iodine; integral (reset) action. In modulating process control, the amount of change of a correcting force that is proportional to the error signal.

I&C Technician

Instrumentation and control technician.

ice bath

The true freezing point of water; the temperature at which pure water freezes (0 C or 32 F). The temperature at which a mixture of air-saturated pure water and pure ice may exist in equilibrium at a pressure of 1 standard atmosphere.

See also ice point.

ice point

See ice bath.

ICMP

Internet Control Message Protocol. A TCP/IP process that provides a set of functions for the management and control of the networking layer.

icon

A graphic symbol that represents a function or the functions to be performed by the system.

I controller

controller, integral (reset) (I).

ID

A unique IDentifier for batches, lots, operators, technicians, and raw materials. [ANSI/ISA-88.01 1995]

ideal elastic behavior

A material characteristic under given conditions, when the strain is a unique straight-line function of stress and is independent of previous stress history.

ideal gas

A hypothetical gas that obeys precisely the equation for a perfect gas, PV = nRT.

idealized system

See system, idealized.

ideal transducer

A hypothetical passive transducer that produces the maximum possible output for a given input.

ideal value

See value, ideal.

identification

[Eng] 1. In engineering, the sequence of letters, digits, or both, that are used to designate an individual instrument or loop. [ANSI/ISA 5.1 1984 (R1992)] Sometimes called tag name. [Cont]...