Measurand taxonomy

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

accelerationVibration

The measurement of the capacitance of a device.

capacitanceElectrical

This process measures electric charge sourced in direct-current mode.

charge

The process of measuring the Electrical Conductance of a device.

conductanceElectrical

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

conductivityChemical

The process measures the AC Current sourced by a device without knowing the shape of the signal. Values can only be tested in RMS because the shape of the signal is unknown.

currentElectrical

The process measures the AC Current sourced by a device without knowing the shape of the signal is a sinewave. Knowing the shape of the waveform allows the system to make conver…

currentElectrical

The process measures the Squarewave Current sourced by a device with the assumption it is generating an AC Squarewave. Knowing the shape of the waveform allows the system to mak…

currentElectrical

The process measures the Alternating Current sourced by a device with the assumption it is generating an AC Trianglewave. Knowing the shape of the waveform allows the system to …

currentElectrical

The process measures the Direct Current (or DC) sourced by a device.

currentElectrical

Test Process that measures 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 respons…

density-massMass

Test Process that measures 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 do…

density-massMass

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 contrac…

density-massMass

Test Process that measures the Force as defined as mass times acceleration (F = m * a). The formula describes a free mass or the net force on any mass. Dead-weight force measure…

forceMass

The process of measuring the frequency of a signal.

frequencyElectrical

The process of measuring the demodulated frequency rate of an Amplitude Modulate (AM) signal.

frequencyElectrical

The process of measuring an arbitrary Cardiograph waveform frequency.

frequencyTime and Frequency

This process measures the Deviation Frequency of a Frequency Modulated (FM) signal. The deviation is used to describe the maximum difference between an FM modulated frequency …

frequencyElectrical

The process of measuring the Demodulated Rate of a Frequency Modulated (FM) Signal.

frequencyElectrical

The process of measuring the demodulated frequency rate of a phase-modulated RF signal.

frequencyElectrical

The process of measuring the impedance of a device.

impedanceElectrical

The process of measuring the Inductance of a device.

inductanceElectrical

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 …

lengthDimensional

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

lengthDimensional

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.

lengthDimensional

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 itsel…

lengthDimensional

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 commo…

lengthDimensional

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…

lengthDimensional

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 …

lengthDimensional

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

lengthDimensional

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 q…

lengthDimensional

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

lengthDimensional

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

lengthDimensional

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.

lengthDimensional

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 conventionall…

massMass

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 fie…

massMass

A test process of measuring power spectral density offset from the carrier as compared to the carried power.

phase-noiseElectrical

The process of measuring the phase-modulated component of a phase-modulated RF signal typically in radians.

phaseElectrical

The process of measuring the Reflection Coefficient Phase of an RF signal that is reflected back to the transmitting port.

phaseElectrical

The process of measuring the Transmission Coefficient Phase of an RF signal that transmitted through the device under test.

phaseElectrical

A test process that measures the RF power of a signal. It can be either direct or monitored by an RF Power measurement device

powerElectrical

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 gravi…

powerAcoustics, ultrasound and vibration

This test process measures the pneumatic differential pressure between two points generated by the unit under test. The resulting pressure difference will return in the unit of…

pressurePressure

This test process measures the hydraulic pressure generated by the unit under test. The resulting measured will be in the unit of measure as defined in the test point’s data. No…

pressurePressure

This test process measures the pneumatic absolute pressure generated by the unit under test. The resulting measured will be in the unit of measure as defined in the test point’s…

pressurePressure

This test process measures the pneumatic gage (or relative pressure) generated by the unit under test. The resulting measured will be in the unit of measure as defined in the te…

pressurePressure

The process of measuring the Percent of Modulation of an Amplitude Modulation (AM) Signal.

ratioElectrical

Test Process that measures the relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference mate…

ratioMass

Measuring the ratio of the water vapor’s partial pressure divided by the saturation water vapor pressure allowed at a given temperature.

ratioThermodynamics

Measuring the ratio of the mass of water vapor to the total mass of the dry air. The gravimetric method of calibration determines the specific humidity, with pressure and temper…

ratioThermodynamics

A test process that measures the difference between 2 sinusoidal RF signals at different frequencies while keeping the power levels constant. The two measured values are compa…

powerElectrical

A test process that measures the difference 2 sinusoidal RF signals at different power levels keeping the frequency constant. The two measured values are compared, the results…

ratioElectrical

The process of measuring the Reflection Coefficient magnitude of an RF signal that is reflected back to the transmitting port.

ratioElectrical

The process of measuring the Transmission Coefficient magnitude of an RF signal that transmitted through the device under test. It is represented as a ratio of power received o…

ratioElectrical

A ratio of an instrument’s torque output to the torque applied to the input, e.g., a torque multiplier’s output torque divided by its input torque

torqueTorque

A test process that measures the ratio between the AC ripple & noise in RMS voltage measured on a DC signal then divided by the DC voltage level creating a ratio between the two…

ratioElectrical

A test process that measures the amplitude-response difference between two sinusoidal AC sinewave signals at different frequencies while keeping the source voltage level constan…

voltageElectrical

A test process that measures the difference between sinusoidal AC sinewave signals at different voltage levels keeping the frequency constant. The two measured values are compar…

ratioElectrical

The process of measuring the resistance of a resister or other device.

resistanceElectrical

The process of measuring the physical temperature of a device.

temperatureThermodynamics

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

temperatureThermodynamics

The process of measuring the simulated temperature in voltage from a PRT or SPRT device.

temperatureThermodynamics

The process of measuring the simulated temperature in voltage from a RTD device.

temperatureThermodynamics

The process of measuring the simulated temperature in voltage from a thermocouple device.

temperatureThermodynamics

The process of measuring the current time using the Universal Time Coordinated / Coordinated Universal Time.

timeTime and Frequency

The process of measuring the pulse transition time of a square wave signal. The transition can be either be in a positive direction (Risetime) or a negative direction (Fall time).

timeElectrical

A test process measuring the accuracy of a torque wrench or other torquing device.

torqueTorque

A test process that measures the accuracy of hydraulic torque wrenches where hydraulic pressure is applied to the torque wrench and it applies a known torque to the nut or bolt …

torqueTorque

The process measures the AC RMS (Root-Mean-Square) voltage sourced by the UUT. Values can only be expressed in RMS because the shape of the signal is no known.

voltageElectrical

A test process that measures the RMS AC voltage ripple or noise on a DC signal.

voltageElectrical

The process measures the AC RMS (Root-Mean-Square) voltage sourced by the UUT. Because the shape is known the values can be converted to Volts PeakToPeak.

voltageElectrical

The process measures the AC RMS (Root-Mean-Square) voltage sourced by the UUT. Because the shape is known the values can be converted to Volts PeakToPeak.

voltageElectrical

This test process measures the DC (Direct Current) voltage sourced from the UUT.

voltageElectrical

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.

accelerationVibration

UUT is placed in a device, normally a shaker, which then moves in a single axis direction at a known acceleration at the reference frequency. Then the amplitude is changed and t…

accelerationVibration

UUT is placed in a device, normally a shaker, then the shaker moves in a single access direction at a known acceleration and frequency.

accelerationVibration

This is the process of generating a known capacitance.

capacitanceElectrical

The process of sourcing Electrical Conductance either from a fixed device or simulated.

conductanceElectrical

The process of sourcing Electrical Conductivity either from a fixed device or simulated.

conductivityElectrical

The process of sourcing a Direct Current) voltage from a device and measuring the value on the UUT.

currentElectrical

The process of sourcing a Sinusoidal Alternating Current signal. Knowing the shape of the waveform allows the system to make conversions from RMS to PeakToPeak.

currentElectrical

The process of sourcing a Squarewave Alternating Current signal. Knowing the shape of the waveform allows the system to make conversions from RMS to PeakToPeak.

currentElectrical

The process of sourcing a Triangle Alternating Current signal. Knowing the shape of the waveform allows the system to make conversions from RMS to PeakToPeak.

currentElectrical

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 responsi…

density-massMass

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 doe…

density-massMass

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…

density-massMass

Test Process that sources a Force as defined as mass times acceleration (F = m * a). The formula describes a free mass or the net force on any mass. Dead-weight force measuremen…

forceMass

The process of generating a frequency-stable sinewave waveform.

frequencyElectrical

The process of generating a frequency-stable square waveform.

frequencyElectrical

The process of generating a frequency-stable RF Sinewave waveform.

frequencyElectrical

The process of measuring the impedance of a device.

impedanceElectrical

The process of sourcing electrical Inductance of a device either fixed or simulated.

inductanceElectrical

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 …

lengthDimensional

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

lengthDimensional

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.

lengthDimensional

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…

lengthDimensional

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

lengthDimensional

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 q…

lengthDimensional

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

lengthDimensional

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.

lengthDimensional

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…

flow-mass

Test Process that sources a 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 c…

massMass

Test Process that sources a 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.…

massMass

The process of sourcing a sinusoidal AC Power signal from a device and measuring the value on the UUT. This test process can be used by any device that measures absolute AC power.

powerElectrical

The process of sourcing a sinusoidal AC Power signal from a device where the Volts and Amps are provided on two different outputs and measured by the UUT as Watts / Power. This …

powerElectrical

The process of sourcing DC Power signal from a device and measuring the value on the UUT. This test process can be used by any device that measures absolute DC power.

powerElectrical

The process of sourcing a sinusoidal DC Power signal from a device where the Volts and Amps are provided on two different outputs and measured by the UUT as Watts / Power. This …

powerElectrical

This process connects a Termination to the input of a measurement device to reduce the noise and outside electrical signals. The test process is typically used to measure the UU…

powerElectrical

powerElectrical

This test process generates the hydraulic pressure to be measured by the unit under test. The resulting measured will be in the unit of measure as defined in the test point’s da…

pressurePressure

This test process generates the pneumatic absolute pressure to be measured by the unit under test. The resulting measured will be in the unit of measure as defined in the test p…

pressurePressure

This test process generates two pneumatic pressures with a known differential pressure between two points measured by the unit under test. The resulting differential pressure w…

pressurePressure

This test process generates the pneumatic gage pressure (or relative pressure) to be measured by the unit under test. The resulting measured will be unit of measure as defined i…

pressurePressure

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 dif…

ratioVibration

UUT is placed in a device, normally a shaker, which then moves in a single axis direction at a known acceleration at the reference frequency. Then the frequency is changed to th…

ratioVibration

The generation of humidity as a ratio of the total mass of the water vapor divided by the total volume of air. This is also called volumetric humidity.

ratio

A test process the sources 2 sinusoidal RF signals at different frequencies keeping the power levels constant between the two frequencies. The FrequencyRef signal is sourced an…

ratioElectrical

ratioElectrical

A test process the sources two sinusoidal AC Voltage signals at different frequencies keeping the voltage levels constant between the two frequencies. The FrequencyRef signal is…

ratioElectrical

A test process that sources two sinusoidal AC Voltage signals at different voltage levels keeping the frequency constant. The ReferenceVoltage signal is sourced and the voltage …

ratioElectrical

The process of sourcing electrical Resistance of a device either fixed or simulated.

resistanceElectrical

The process of generating a physical temperature to be measured by a device.

temperatureThermodynamics

The process of generating a physical temperature buy observing the triple point or melting point of a specified substance under a known pressure or atmosphere. Wiki - Triple Poi…

temperatureThermodynamics

The process of generating an infrared temperature on a block body to be measured by an infrared measuring device.

temperatureThermodynamics

The process of generating resistance simulating temperature to be measured by a PRT or SPRT temperature measuring device.

temperatureThermodynamics

The process of generating resistance simulating temperature to be measured by an RTD temperature measuring device.

temperatureThermodynamics

The process of generating a simulated temperature in voltage representing a temperature to be measured by a device.

temperatureThermodynamics

The process of generating a period-stable pulsed marker waveform.

timeTime and Frequency

The process of generating a period-stable square waveform.

timeTime and Frequency

A test process of generating a known torque.

torqueTorque

The process of sourcing a sinusoidal AC Voltage signal from a device and measuring the value on the UUT. This test process can be used by any device that measures absolute AC Vo…

voltageElectrical

The process of sourcing a DC (Direct Current) voltage from a device and measuring the value on the UUT.

voltageElectrical

The process of sourcing two DC (Direct Current) voltage signals. First the ReferenceVoltage signal is sourced and measured on the UUT, that value is stored as reference. Then th…

voltageElectrical

This process connects a Termination to the input of a measurement device to measure the no signal applied voltage /noise at the inpu. The test process is typically used to meas…

voltageElectrical

This process connects a Short to the input of a measurement device and measures the no signal applied Voltage. This is The test process is typically used to measure the UUT’s Z…

voltageElectrical

This process sources a reference volume flow rate of gas for calibrating gas-flow meters. The instantaneous volumetric flow rate q_V equals dV/dt, sometimes estimated as ∆V/∆t u…