The Measurement deviation as defined in the DIN 1319-1 the difference between a measured value and the true value a measured quantity. Since the true value cannot, in practice, ever be determined exactly, the actual measurement error can never be fully determined either.
For this reason, in industrial measurement technology, the difference between the measured value and a correct value considered. This correct value is determined using a calibrated Normal or a reference measuring instrument, and serves as a benchmark for evaluating measurement accuracy.
Measurement Error in Measurement Technology
Every measurement is subject to a certain degree of uncertainty. Causes of measurement deviations may include, among others:
- Tolerances of the measuring device
- Sensor Deviations
- Environmental factors such as temperature or humidity
- Line and Contact Resistances
- Aging of Components
- Operating or reading errors
For a measuring instrument to meet the required accuracy, the measurement deviations must fall within the specified Accuracy Class or the specified measurement uncertainty.
Calibration and Measurement Error
In the case of a Calibration The measuring instrument is compared with a traceable reference standard. During this process, the measurement deviation is determined and documented for various measurement points. This allows one to verify whether the measuring instrument meets the required specifications or whether an adjustment is necessary.
Regular calibration is essential, particularly in quality assurance, in accredited laboratories, and in safety-critical industrial applications.
Gaussian Normal Distribution
If identical measurements are performed multiple times under the same conditions, the measured values typically vary around the correct value. This variation often follows the Gaussian normal distribution (Bell curve).
Most measured values are close to the true value, while larger deviations occur much less frequently. This statistical behavior forms the basis for evaluating measurement uncertainties and measurement systems.
Minimizing Measurement Errors with Delphin
A low measurement error is crucial for reliable measurement results and high process quality. The Measurement data acquisition systems Products from Delphin Technology offer high-precision analog inputs, excellent long-term stability, and a wide range of functions for acquiring a variety of sensor signals. This helps minimize measurement errors and ensure reproducible measurement results.
In combination with the ProfiSignal-Software allows measurement data to be monitored, analyzed, and documented in real time. This assists users with calibrations, test bench experiments, laboratory applications, and continuous process monitoring.
Why Measurement Error Is Important
Knowledge of measurement error is essential for numerous applications:
- Reliable Process and Product Monitoring
- Evaluation of Measurement Accuracy
- Calibration of Measuring Instruments
- Quality assurance
- Comparison of Measurement Systems
- Compliance with Regulatory Requirements