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.

 






IMPACT PRESSURE

The pressure in a moving fluid which is exerted parallel to the direction of flow, caused by the inertial effects of the mass of the fluid. Also called DYNAMIC PRESSURE or VELOCITY PRESSURE.

INDEPENDENT LINEARITY

Maximum deviation from the linear regression line (least squares fit) for all measured points, expressed as percent of full scale output.

INERTANCE (or accelerance)

The ratio of acceleration to force. 1/M = F/A

INPUT IMPEDANCE

The equivalent value of resistance and inductance or capacitance, in series or parallel with the input terminals.

INPUT RESISTANCE

The resistance measured on the excitation voltage leads on a piezoresistive device. By convention, these are the black and red leads.

INSULATION (ISOLATION) RESISTANCE

The DC resistance, expressed in ohms, measured between any electrical connector pin or lead wire and the transducer body or case. Normally measured at 50 Vdc.

ISOLATION FROM POWER SUPPLY

Isolation that is the absence of a direct electrical connection between the lines of the power supply and the amplifier common.