Id Name Aspect Definition
MeasureInductance Measure.Inductance inductance The process of measuring the Inductance of a device.
MeasureLength Measure.Length length Length is the straight-line distance between two points. It can be measured in one, two, or three dimensions with 6 degrees of freedom. Length measurements are made from Point 1 to Point 2 based on the reference definition of an ISO or ASME standard datum specifically defining the orientation and references for each of the x,y,z points. The start and end points allow defining and distinguishing direction if required; otherwise, they are interchangeable.
MeasureLengthCircumference Measure.Length.Circumference length Length Circumference is the length measured around the inside or outside of a round or circular object.
MeasureLengthDiameter Measure.Length.Diameter length Length Diameter is the edge-to-edge straight-line distance passing through the center of a circular object. It can measure the inside open space or outside diameter of the object.
MeasureLengthFormFlatness Measure.Length.Form.Flatness length The minimum normal (perpendicular) distance between two parallel planes that fully contain a surface. Commonly, the two parallel planes may be constructed from the surface itself (in which the highest point and lowest point of the surface would be tangent to the two parallel planes), but a drawing may specify how the parallel planes should be constructed. Reference https://www.gdandtbasics.com/flatness/ Dimensioning and Tolerancing, Engineering Product Definition and Related Documentation Practices, ASME Y14.5-2018 https://www.asme.org/codes-standards/find-codes-standards/y14-5-dimensioning-tolerancing
MeasureLengthFormParallelism Measure.Length.Form.Parallelism length Parallelism is a fairly common symbol that requires the referenced surface or line to be parallel to a datum surface or line. Parallelism can reference a 2D line, but more commonly it describes the orientation of one surface plane parallel to another datum plane.
MeasureLengthFormPerpendicularity Measure.Length.Form.Perpendicularity force Perpendicularity is a fairly common symbol that requires the referenced surface or line to be perpendicular or 90° from a datum surface or line. Perpendicularity can reference a 2D line, but more commonly it describes the orientation of one surface plane perpendicular to another datum plane.
MeasureLengthFormRoughness Measure.Length.Form.Roughness length Roughness is the measure of the finer surface irregularities in the surface texture (texture comprises roughness, waviness, and form), either along a profile (line) or across a surface. Form is a long spatial wavelength, or the overall “shape” of the surface. Waviness is a shorter spatial wavelength, such as an undulation in the shape. Roughness is the shortest spatial wavelength of the surface irregularities. These surface irregularities are results of the manufacturing process employed to create the surface. Roughness is measured, using a numerical parameter, which is a description of the overall roughness of the surface. Roughness average (Ra), sometimes previously known as arithmetic average (AA) or (CLA), both now deprecated,, is the rated as then the is a parameter, calculated as the arithmetic mean deviation of the surface valleys and peaks. Units used are typically in micrometers or microinches. Reference https://www.engineersedge.com/surface_finish.htm https://en.wikipedia.org/wiki/Surface_roughness ASME B46.1.2019
MeasureLengthFormRoundness Measure.Length.Form.Roundness length Roundness is the feature described as deviation (radial error) from true roundness (mathematically, a circle).
MeasureLengthFormSphericity Measure.Length.Form.Sphericity length Sphericity is a measure of how closely the shape of an object resembles that of a perfect sphere. For example, the sphericity of the balls inside a ball bearing determines the quality of the bearing, such as the load it can bear or the speed at which it can turn without failing. Sphericity is a specific example of a compactness measure of a shape. Defined by Wadell in 1935,[1] the sphericity, {\displaystyle \Psi }\Psi , of a particle is the ratio of the surface area of a sphere with the same volume as the given particle to the surface area of the particle: where {\displaystyle V_{p}}V_p is volume of the particle and {\displaystyle A_{p}}A_p is the surface area of the particle. The sphericity of a sphere is unity by definition and, by the isoperimetric inequality, any particle which is not a sphere will have sphericity less than 1. Sphericity applies in three dimensions; its analogue in two dimensions, such as the cross sectional circles along a cylindrical object such as a shaft, is called roundness.
MeasureLengthFormStraightnessAxis Measure.Length.Form.Straightness.Axis length The minimum diameter of a cylinder that fully contains a specified line.
MeasureLengthFormStraightnessSurface Measure.Length.Form.Straightness.Surface length The minimum normal (perpendicular) distance between two parallel planes that fully contain a surface along a specified line.
MeasureLengthRadius Measure.Length.Radius length Length Radius commonly thought of as half the diameter of a full circle, the radius is the distance from the center point to the edge of an arc or partial circle.
MeasureMassConventional Measure.Mass.Conventional mass Test Process that measures the conventional value of the result of weighing a body in air equals the mass of a standard that balances this body under the following conventionally chosen conditions: ambient temperature 20 °C air density 1.2 mg/cm³ mass density 8.000 g/cm³ Conventional mass has the same unit as mass (the kilogram), because the multiplication of a mass by a dimensionless quantity defines its values. Labs typically measure mass and correct the results from actual to conventional conditions. “Apparent Mass versus 8.0 g/cm³” formerly equated to conventional mass in the United States. References: NISTIR 6969 (2019) https://www.nist.gov/publications/nistir-6969-selected-laboratory-and-measurement-practices-and-procedures-support-1 OIML D28 (2004) https://www.oiml.org/en/files/pdf_d/d028-e04.pdf NIST Handbook 44: https://www.nist.gov/pml/weights-and-measures/publications/nist-handbooks/other-nist-handbooks/other-nist-handbooks-2-3
MeasureMassTrue Measure.Mass.True mass Test Process that measures the quantity of matter which a body contains, as measured by its acceleration under a given force or by the force exerted on it by a gravitational field. The term “mass” is always used in the strict Newtonian sense as a property intrinsic to matter. Mass is the proportionality constant between a force on a material object and its resulting acceleration. This property is sometimes referred to as “true mass”, “vacuum mass”, or “mass in a vacuum” to distinguish it from conventional [apparent] mass. The true quantity of matter represented in a vacuum with no gravitational force.
MeasurePhasePhaseModulation Measure.Phase.PhaseModulation The process of measuring the phase-modulated component of a phase-modulated RF signal typically in radians.
MeasurePhaseReflectionFactorRF Measure.Phase.ReflectionFactor.RF The process of measuring the Reflection Coefficient Phase of an RF signal that is reflected back to the transmitting port.
MeasurePhaseTransmissionFactor Measure.Phase.TransmissionFactor The process of measuring the Transmission Coefficient Phase of an RF signal that transmitted through the device under test.
MeasurePhase-NoiseSideband Measure.Phase-Noise.Sideband A test process of measuring power spectral density offset from the carrier as compared to the carried power.
MeasurePowerUltrasonic Measure.Power.Ultrasonic power The time-average ultrasonic power emitted by an ultrasonic transducer. The measurement of ultrasonic power in liquid is based on the measurement of radition force using a gravimetric balance. The acoustic power radiated from the transducer can be related to the radiation force measured by an electronic balance.