Therefore, it is recommended that the measuring instruments are calibrated regularly by a reputable company to ensure that errors associated with the measurements are in the acceptable range. The hidden costs and risks associated with un-calibrated measuring device could be much higher than the cost of calibration. Periodically (annually, quarterly, monthly).After any mechanical or electrical shock.According to the recommendation of the manufacturer.When should you calibrate your measuring device? Accurate measuring devices improve product quality. The bottom line is that calibration improves the accuracy of the measuring device. Depending on the type of instrument and the environment in which it is being used, it may degrade very quickly or over a long period of time. However, changes in accuracy can also be caused by electric or mechanical shock or a hazardous manufacturing environment (e.x., oils, metal chips etc.).
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This is typically caused by normal wear and tear. The accuracy of all measuring devices degrade over time. A calibrated optical flat is used to check the flatness and parallelism. For the calibration of the scale, a calibrated slip gauge is used.
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In addition, these instruments are also calibrated for zero error in the fully closed position and flatness and parallelism of the measuring surfaces. Here, accuracy of the scale is the main parameter for calibration. To explain how calibration is performed we can use an external micrometer as an example. The remainder of the two-sided power spectrum SAA is discarded. A report is provided by the calibration expert, which shows the error in measurements with the measuring device before and after the calibration. ©National Instruments Corporation 3 Application Note 041 where SAA(i) is the two-sided power spectrum, GAA(i) is the single-sided power spectrum, and N is the length of the two-sided power spectrum. In practice, calibration also includes repair of the device if it is out of calibration. Sure Controls provides preventative field service to help you ensure your instruments and controls are accurately calibrated.Ĭalibration of your measuring instruments has two objectives: it checks the accuracy of the instrument and it determines the traceability of the measurement. However, an accuracy ratio of 3:1 is acceptable by most standards organizations. Typically, the accuracy of the standard should be ten times the accuracy of the measuring device being tested. (2000).Calibration is a comparison between a known measurement (the standard) and the measurement using your instrument. Source: Information literacy competency standards for higher education.
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Information Literacy is a set of abilities requiring individuals to “recognize when information is needed and have the ability to locate, evaluate, and use effectively the needed information.”