Kaman KDM-8200 - Manual (Page 35)

35
Kaman Precision Products
Appendix A: Glossary
A/D Converter
A device that converts an analog voltage to a digital representation.
Analog Output
Output voltage of a system that is a continuous function of the target position relative to
the sensor.
Dimensional
A standard of measurement or precision reference against which one correlates the
Standard output of the system, i.e. a micrometer fixture, feeler gauges, precision ceramic spacers,
etc.
Drift
Undesirable change in system output over a period of time while the sensor / target
position is constant. It may be unidirectional or cyclical and caused by such things as
aging of the electrical circuits or environmental changes impacting the system.
Effective An application dependent value determined by multiplying the equivalent input noise
Resolution
specification by the square root of the measurement bandwidth.
Equivalent RMS
A figure of merit used to quantify the noise contributed by a system component. It
Input Noise incorporates into a single value factor influencing a noise specification, such as signal-to-
noise ratio, noise floor, and system bandwidth. Given a measurement system’s
sensitivity and the level of “white noise”, equivalent RMS input noise can be expressed
in actual measurement units.
Full Scale Output
The voltage output measured at full-scale displacement for which a system is calibrated.
(FSO) The algebraic difference between end points.
Gain
The function of increasing and decreasing sensitivity. Changing gain will increase or
decrease the slope of the output curve.
Iteration
Repetition.
Linearity
The closeness of a calibration curve to a specified straight line.
Loading
The affect of conductive materials positioned within 3 times the diameter of a sensor, that
are a permanent part of the measuring environment.
Measurement
The difference between the upper and lower frequency response limits of a system.
Bandwidth KDM-8200 system bandwidth is 0 to 50,000 Hz.
Noise
Any unwanted electrical disturbance or spurious signal that modifies transmitting
display or recording of desired data.
Offset
The required gap between the sensor face and the target at zero range. Usually specified
in mils and is dependent upon sensor type.
Output
The electrical quantity produced by the sensor and modified by the system as a function
of target position relative to the sensor.