What is Calibration?

 Calibration is a process through which a certain instrument is brought to a standard previously given. The process of calibrating something refers to the act of checking the accuracy of a measuring instrument which is, therefore, adjusted by being compared to the standard. The idea is that the measurement instrument needs to match a standard and to meet all the requirements imposed by it.



An eloquent example for the aforementioned process is when we try to calibrate a "thermometer" which needs to function according to some given standards in order to be able to measure properly the temperature.


Another question that arises now is what standard is. The answer is simple: it represents the device with a known or assigned correctness.


Therefore, when calibrating a certain device, we always resort to this reference point, by comparison. The instrument being calibrated is the unit under test, and, that is why, sometimes it is called the "test instrument". A measuring instrument's reading should be accurate in terms of the physical unit of measurement. The physical unit of measurement, in turn, should be traceable to the ultimate fundamental unit through calibration.


The concept of calibration has seriously changed physicians' perspective on things, as it has first introduced the idea of precision. It was an important boost for the Industrial Revolution which was to come. All of a sudden we had a new form of measurement which was now more accurate than ever. The previously used types of measuring devices were based more on intuition and, therefore, were easier validated.


But things have changed once this notion has been acknowledged. This process is all about having a scale which all the measuring devices have to comply with. The key-concept of the process is that it requires the length scale to be set to zero at that same point.


In conclusion, we would like to highlight that the process of calibration refers to the design of a certain measuring device which needs to be calibrated. In other words, that instrument should be capable to meet the requirements of a measurement scale when used within a certain given environment. Therefore, the design process involves the selection of standard features, this being the most obvious and important part of the entire complex act of this process.


Theoretically, the procedure is a specific test method which is based on a basic concept: comparison. But one should also consider the complexity of the instruments we are dealing with, and, therefore, understand that successful processing needs to be consistent and systematic.


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Article Source: https://EzineArticles.com/expert/Paul_James_Harrison/576450




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