electronic measuring instrument (OIML D 11, 3.1)

instrument intended to measure an electrical or non-electrical quantity using electronic means and/or equipped with electronic devices

module (OIML D11, 3.2)

device performing a specific function or functions and (usually) manufactured and constructed such that it can be separately evaluated according to prescribed metrological and technical performance requirements

device (OIML D 11, 3.3)

identifiable instrument or part of an instrument or of a family of instruments that performs a specific function or functions

checking facility (OIML D11, 3.19)

facility incorporated in a measuring instrument which enables significant faults to be detected and acted upon

automatic checking facility (OIML D 11, 3.19.1)

checking facility that operates without the intervention of an operator

permanent automatic checking facility (type P) (OIML D 11, 3.19.1.1)

automatic checking facility that operates at each measurement cycle

intermittent automatic checking facility (type I) (OIML D 11, 3.19.1.2)

automatic checking facility that operates at certain time intervals or per fixed number of measurement cycles

non-automatic checking facility (type N) (OIML D 11, 3.19.2)

checking facility that requires the intervention of an operator

durability protection facility (OIML D 11, 3.20)

facility incorporated in a measuring instrument that enables significant durability errors to be detected and acted upon

test (OIML D 11, 3.21)

series of operations intended to verify the compliance of the equipment under test (EUT) with specified requirements

test procedure (OIML D 11, 3.21.1)

detailed description of the test operations

performance test (OIML D 11, 3.21.4)

test intended to verify whether the EUT is able to accomplish its intended functions

mains power (OIML D 11, 3.22)

primary external source of electrical power for an instrument, including all sub-assemblies. (Examples: public or local power grid (AC or DC) or external generator)

power converter (power supply device) (OIML D 11, 3.23)

sub-assembly converting the voltage from the mains power to a voltage suitable for other sub-assemblies

auxiliary battery (OIML D 11, 3.25)

battery that is

• mounted in, or connected to, an instrument that can be powered by the mains power as well, and

• capable of supplying power to the complete instrument for a reasonable period of time

back-up battery (OIML D 11, 3.26)

battery that is intended to maintain power supply for specific functions of an instrument in the absence of the primary power supply that includes both mains power & auxiliary battery