Dictionary · Instruments
Limiting operating condition
An extreme operating condition an instrument is required to withstand without damage and without degrading specified properties when subsequently operated under rated conditions — survival limits, not working limits.
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Material measure
A device reproducing or supplying, in a permanent manner during its use, quantities of given values — gauge blocks, standard weights, volumetric flasks, standard resistors.
VIM (JCGM 200:2012) 3.6
Reference operating condition
An operating condition prescribed for evaluating the performance of an instrument or for comparing results — the 23 °C ± 1 °C line at the top of a datasheet.
VIM (JCGM 200:2012) 4.11
Rated operating condition
An operating condition that must be fulfilled during measurement for an instrument to perform as designed — the environmental and use envelope the specs assume.
VIM (JCGM 200:2012) 4.9
Maximum permissible error (MPE)
The extreme value of measurement error, with respect to a known reference value, permitted by specifications or regulations for a given instrument. Verification confirms indications fall within ±MPE.
VIM (JCGM 200:2012) 4.26
Measuring instrument
A device used for making measurements, alone or in conjunction with supplementary devices.
VIM (JCGM 200:2012) 3.1
Displaying measuring instrument
An indicating instrument whose output signal is presented in visual form.
VIM (JCGM 200:2012) 3.4