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Calibration Process and Tools Used

10/1/2013 11:51:09 AM | by Anonymous

Calibration Service

Calibration is the comparing of measurements. There is usually a baseline or standard that is set correctly. The object that is to be calibrated is then compared to the object that has been set correctly in the first place and adjusted so that they match. This second object is referred to as the unit under test or test instrument.


Calibration process


The calibration process, that many calibration services provide, starts with producing the measuring object that has to be calibrated. The calibration device has to be almost exact or meet the tolerance level in the engineering industry in the given environment over a significant period of time. Having such features in their calibrating device will greatly improve its accuracy.


The detailed mechanism for the values of tolerance varies by industry and country. However the manufacturers of such calibration devices are able to customize the values by assigning a calibration interval that complies with the environmental restrictions of a particular environment. The frequency of usage of that equipment is also an important factor to consider when deciding on a calibration interval. The most common type of intervals used would be after 10 hours of use for 5 days for 6 months. However, if the object were to be used more often then its interval would have to be shortened.


The next thing to do would be to set up the calibration process. This requires selecting from a standard that would be used to calibrate the test objects. The allowance for difference between the test object and the standard should not be less than a quarter. Thus, this is the goal that is set when calibrating most test objects.


However, it may be quite difficult to maintain such accuracy in modern equipment as most of the test objects may just be exact as the standard. Thus, it is difficult to make such tiny adjustments. Some connection techniques may influence the calibration process between the test object and the standard. For example, for calibration that uses electronic means, the connection of cables may directly influence the process and thus providing an inaccurate result.


The calibration process also collects important data that has occurred in the process. This is important as the data that was collected and recorded will then be re-used or re-applied in the next calibration process. Improvements will be made until the process has been perfected.

When to calibrate


Calibration may be required under certain circumstances such as: if a new instrument or object is obtained, after the object or instrument has been repaired or modified, after a significant amount of time has passed, after the object or instrument has met its calibration interval, after/before an important measurement, any vibration or shock that could have altered the calibrator, sudden and major changes in the weather, when the results shown are unrealistic or inconsistent or when the manufacturer specifies so.


Calibration services and tools


Calibration is seen as the process of altering the indicators on a measuring instrument to meet a certain standards, however such equipment is not needed often and thus it hardly makes sense to purchase one. This is where calibration services become useful. Companies who deal with calibration services are the ones who purchase all these equipment and provide calibration services in exchange for money. It is also wiser to hire services from such companies as they posses the required knowledge and expertise.


There are many tools that can be used as calibrating tools depending on the type of equipment or instrument that is to be calibrated. Some of these tools include milliamp looping calibrators, multi function calibrators, temperature calibrators, pressure calibrators, clamp meters, calibration gases, test pumps and more.

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