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(CM) the use of various technologies to determine the condition of equipment, at a specific moment in time, using minimal or non-invasive means. Common tools used in condition monitoring are vibration analysis, oil analysis, ferrography, thermography, electric current wave form analysis and boroscopic examination. Supplemental technologies, such as demodulation, ultrasonic analysis, shock-pulse, spike-energy, HFD, etc., for roller bearing element condition monitoring, may be used in addition to vibration analysis.

Related Terms


An electron tube characterized by the interaction of electrons with the electric field of circuit element in crossed steady electric and magnetic fields to produce an alternating current power output. It is used to generate high power output in the ultra-high and super-high frequency bands.


A device for detonating an explosive charge; usually consists of a machine by which an operator, by pressing downward or otherwise moving a handle of the device, may generate a powerful transient electric current which is transmitted to an electric blasting cap. Also known as blasting machine.


A piezoelectric crystal used in an electric circuit, for example, as a transducer to convert mechanical or acoustical piezoelectric element piezoelectric gage signals to electric signals, or to control the frequency of a crystal oscillator.


When two different adjacent metals are heated, an electric current is generated between the metals.


The total maximum possible movement parallel to bearing axis of inner ring in relation to outer ring in ball or roller bearing assembly. Also called bearing end play.


The production of magnetic flux by supplying electric current to the field poles of a generator to create a variable magnetic field.


  1. A value of temperature or pressure at which a control circuit closes. 2. An electrical device that allows current to flow through an electric circuit.


A wave that oscillates without progressing. One-half of such a wave may be illustrated by the oscillation of the water in a pan that has been tilted. Near the axis, which is called the node or nodal line, there is no vertical rise and fall of the water. The ends of the wave are called loops and at these places the vertical rise and fall is at a maximum. The current is maximum near the node and minimum at the loops. The period of a stationary wave depends upon the length and depth of the body of water. A stationary wave may be resolved into two progressive waves of equal amplitude and equal speeds moving in opposite directions. Also called STANDING WAVE.


A derived unit of electric potential in the International System of Units, it is the difference of electric potential between two points of a conducting wire carrying a constant current of 1 ampere, when the power dissipated between these points is equal to 1 watt.


Chemical decomposition caused by action of an electric current in a solution.

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