Force measurement follows the international system of units (SI). The international system is recognized worldwide and is used to eliminate potential conversion errors, force measurements are given using metric terms. The SI unit of force is the Newton, abbreviated as N. Force is measured in direction and magnitude. Newton = unit of force required to accelerate a 1 kg mass a distance of 1 meter per second. Force measurement calibration uses newton reading to ensure accurate readings.
Testing for Accuracy
The greatest challenge for force measurement application is repeatability. Each measurement should have equivalent output if the same amount of force is used. For the most accurate output, conditions should be as similar as possible. It isn’t always possible to re-create exact testing conditions, so many strive for reproducibility. Reproducibility refers to a closeness of force measurement results under similar testing conditions.
Many pieces of force measurement equipment use dynamic force, which varies. Equipment can become fatigued, leading to a higher uncertainty rate. The fatigue life of equipment refers to the amount of times the specified force can be applied while meeting the uncertainty standard. Fatigued equipment can also be considered out of calibration.
Reliability & Calibration
To ensure that measurement instruments are still performing correctly, they must be checked periodically. Most force measurement equipment has a manufacturer recommended calibration interval. Force measurement calibration can be adjusted over time to reflect usage, equipment that is used more frequently can be calibrated on a shorter cycle.
If force measurement equipment is altered in any way or has sustained damage, the readings may become inaccurate. Depending on how sensitive the piece of equipment, it may not take much damage to significantly alter performance. To ensure reliability, these pieces should be set aside until they are checked for accuracy or, if necessary, re-calibrated.
Unsure if equipment needs calibrated after damage? Have questions about force measurement calibration? Contact e2b calibration.