TESA MH3D, User Manual

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©2004 TESA Switzerland All Rights Reserved.
Page 5-18
User's Manual
MH3D
Glossary
Projection The reproduction of an existing feature on another
existing feature.
Projection Plane The plane to which a feature is moved during a projected
measurement, usually the working plane.
Prompt A question or statement on the video screen of a com-
puter. A prompt asks for information or gives
instructions.
Proportional Probe A probe that gives a signal proportional to its displace-
ment from the free position.
Prototype A sample part that serves as a mode for production parts.
Qualification A procedure for establishing true size, such as probe
qualification against a known reference sphere.
Qualification Sphere An accurate sphere with a known diameter, mounted on
a post that can be fastened to the machine’s table. Used
to qualify the machine and the probes to be used.
Qualify To inform the computer of the location and size of the
probe.
Ram The moving component of a machine that carries the
probe.
Range The difference between the maximum and minimum
values of a set of measurements.
Readout The display of X, Y, and Z coordinates.
Recall To retrieve information that is stored in a computer.
Rectangular Expressing a point in space by its (X,Y,Z) position in
Coordinates relation to a fixed origin. A Cartesian coordinate mea-
suring system.
Reference Sphere Same as Qualification Sphere.
Repeatability Deviation among multiple measurements of a feature or
part. A measure of the ability of an instrument to pro-
duce the same measured value when sequentially
sensing the same quantity under similar mesurement
conditions.
Repeatable Socket A socket that allows the accurate repositioning of one
end of a ball bar.