What is dynamic pressure calibration?

As a rule, sensors always exhibit dynamic behavior. For example, the sensitivity of the sensors under dynamic input loads deviates from the purely static value. With increasing frequency, the deviations of the dynamic behavior from the static one usually become larger. If sensors are used in a dynamic environment, it is also mandatory to have a dynamic calibration to determine the behavior of the sensor and to enable accurate dynamic measurements within the application.

Precise dynamic pressure measurement is needed, for example, to increase the efficiency of combustion engines for fossil and green fuels such as hydrogen. In this way, performance can be increased and emissions reduced.

In addition, the measurement of dynamic fluid pressure is of crucial importance in the regulation and control of hydraulic and pneumatic components in robotics.

Improved dynamic pressure measurements are needed for the development of next-generation technologies and products with improved quality, energy and material efficiency, and safety.

Static calibrations are performed within a state of equilibrium. Here, the measuring system and the test specimen are adjusted to the corresponding calibration environment in order to obtain the static measured values from there.

In a dynamic calibration, measured values are obtained from a dynamic process. Dynamic processes are, for example, impulse-like processes.

The previous approaches for the calibration of sensors used in a dynamic environment is static or based on slowly varying input signals. The generator of Testo Industrial Services created the possibility to generate and measure a real dynamic excitation as a pulse in the millisecond range and thus also application-specific. The metrological traceability is also performed as a dynamic calibration by the Finnish State Metrological Institute.