length

To measure the acceleration or deceleration / the change in velocity of a body. (m/s²)

The process of measuring the Electrical Conductivity of a Solution or a device.

Test Process that measures a solid’s density as defined by the amount of mass present in a specified volume temperature. Temperature affects density as solids expand and contract according to their temperature coefficients. ** Includes voids and non-uniformity

Test Process that measures a solid’s density as defined by the amount of mass present in a specified volume temperature. Temperature affects density as solids expand and contract according to their temperature coefficients. ** Includes voids and non-uniformity

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.

Length Circumference is the length measured around the inside or outside of a round or circular object.

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.

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

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.

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.

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

Roundness is the feature described as deviation (radial error) from true roundness (mathematically, a circle).

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.

The minimum diameter of a cylinder that fully contains a specified line.

The minimum normal (perpendicular) distance between two parallel planes that fully contain a surface along a specified line.

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.

The process of measuring the physical temperature from a block body that will be used to generate infrared temperatures.

UUT is placed in a device then the device accelerates to a known Acceleration (m/s²) Often this is tested by measuring the DC output of an accelerometer on a centrifuge.

Test Process that sources a gas’s density as defined by the amount of mass present in a specified volume of gas at a given temperature and pressure. Gases are extremely responsive to temperature and pressure, causing their densities to change rather quickly. Measuring the density of gas the Ideal Gas Law (P*V = nRT) must be taken into account. ** Includes non-uniformity

Test Process that sources a liquid’s density as defined by the amount of mass present in a specified volume of liquid at a given temperature. Temperature affects density, as does the pressure to the extent that the liquid compresses. In, liquids deemed sufficiently incompressible, the volume does not depend on pressure.

Test Process that sources a solid’s density as defined by the amount of mass present in a specified volume temperature. Temperature affects density as solids expand and contract according to their temperature coefficients. ** Includes voids and non-uniformity

Test Process that sources a gas’s density as defined by the amount of mass present in a specified volume of gas at a given temperature and pressure. Gases are extremely responsive to temperature and pressure, causing their densities to change rather quickly. Measuring the density of gas the Ideal Gas Law (P*V = nRT) must be taken into account. ** Includes non-uniformity

Test Process that sources a liquid’s density as defined by the amount of mass present in a specified volume of liquid at a given temperature. Temperature affects density, as does the pressure to the extent that the liquid compresses. In, liquids deemed sufficiently incompressible, the volume does not depend on pressure.

Test Process that sources a solid’s density as defined by the amount of mass present in a specified volume temperature. Temperature affects density as solids expand and contract according to their temperature coefficients. ** Includes voids and non-uniformity

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

Length Circumference is the length measured around the inside or outside of a round or circular object.

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.

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.

Roundness is the feature described as deviation (radial error) from true roundness (mathematically, a circle).

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.

The minimum normal (perpendicular) distance between two parallel planes that fully contain a surface along a specified line.

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.

This process sources a reference mass flow rate of gas for calibrating gas-flow meters. The instantaneous mass flow rate q_m equals dm/dt, sometimes estimated as ∆m/∆t using the total mass ∆m flowing through a defined surface in time ∆t.

UUT is placed in a device, normally a shaker, which then moves in a single axis direction at a known acceleration at the set frequency. Then the amplitude is changed and the difference in sensitivity is expressed as the slope of the best fit straight line between the data plotted as output (Voltage, IEPE, Current or Charge) vs Test amplitude. Ratio output of linearity expressed as the worst case voltage difference between the measured value and the best fit straight line divided by the full scale output (Voltage, IEPE, Current or Charge)*100 (expressed as a percentage).