Glossary

The vibration monitoring industry has specialized jargon that is commonly used when talking about vibration sensors, accelerometers and associated applications. It's important that you understand common terminology to communicate effectively with vibration monitoring, reliability, condition monitoring and process automation professionals. We hope you find our glossary useful to find specialized terms and definitions used across vibration, condition monitoring and predictive maintenance.

 






LINE PRESSURE

The maximum pressure in the pressure vessel or pipe for differential pressure measurement. Also called COMMON MODE PRESSURE.

LINEAR SYSTEM

A system is linear if its response is directly proportional to excitation over a stated range of amplitudes at a stated fixed frequency. A plot of input versus output amplitudes of a linear system will be a straight line.

LINEARITY

The closeness of a calibration curve to a specified straight line. (See: Amplitude Linearity.)

LOAD IMPEDANCE

The impedance presented to the output terminals of an instrument by the associated external circuitry.

LOW NOISE CABLE

Cable treated with low-noise material to reduce the effects of triboelectric noise. To be used on charge-mode piezoelectric accelerometers.

LOW-PASS FILTER

A wave filter having a single transmission band extending from zero frequency to some finite critical or cutoff frequency.