Search results
23 wrz 2020 · I'm just having a difficult time understanding what the uncertainty for a measuring tape is. In the document it is explained as "the uncertainty for an analogue device is half of the smallest graduation".
11 lip 2022 · Scientists in NIST’s tape calibration laboratory can measure a meter (3.28 feet) with a standard uncertainty of plus or minus 350 nanometers (billionths of a meter). For perspective, a human hair is anywhere from approximately 17,000 to 180,000 nanometers in diameter (0.017 to 0.18 mm).
We shall consider the standard uncertainty of temperature measurement, which in our case is 0,005 C (Godina et al., 2010) and uncertainty of the difference between the temperature of fixing base (where the temperature is measured) and the temperature of the tape measure. Standard uncertainty is therefore: u( m) = 0,05 C (15)
This procedure describes steps taken when calibrating different kinds of tape measures up to 200 m. Measures are of different design, what influence the way of fixing during the calibration. Some tape measures have prescribed tracting force by which they shall be loaded during calibration. 1.1 General
• Every measurement is subject to some level of uncertainty. • A measurement result is incomplete without a statement of the uncertainty. • Knowing the uncertainty in a measurement helps you judge it’s fitness for purpose. • Understanding measurement uncertainty is the first step to reducing it.
2 lis 2016 · What is measurement uncertainty? Classic “piece of string” uncertainty example. Uncertainty components. Your reference standard (calibrator) and its traceability. Other sources of uncertainty. Is it passed or failed calibration? Examples. TUR / TAR ratio vs. uncertainty calculation. Summary & the key takeaways.
This paper discusses the basics of uncertainty in measurement and calibration. It is not made for mathematicians or metrology experts, but rather for those of you who are planning and making practical measurements and calibrations in industrial applications.
