In the Metrology and Quality Inspection Room most calibrations, critical measurements and accurate mechanical processes are carried out ,with a under controlled temperature (close to 20ª) and also Humidity (near yo 70%) appling cutting edge technology and paying the utmost attention to achieving the targets required by the customer, even from an Visual point of view.
The temperature is the crucial element in terms of the measurement results: in fact, 20°C is the reference temperature for the geometric specifications of the pieces.
The air conditioning system must also meet the accuracy requirements, especially for three-dimensional measuring machines (CMM).
The most common activities that take place in a metrology laboratory are:
- Performing precision dimensional measurements with test and measurement equipments.
- Calibration of measuring instruments
This is due to the fact that the measurement of the products must be carried out in an atmosphere with regular temperature and humidity to prevent these products from suffering variations in size and dimension.
In order to guarantee the correct measurement and calibration of products, a metrology room must meet specific characteristics and standards. Some examples are:
- The ISO/IEC 17025 standard, entitled “General requirements for the competence of testing and calibration laboratories”, expresses the need for the work areas of the laboratories to comply with the technical requirements established for the equipment and the performance of the activities .
- The UNE EN ISO 1: 2003 standard establishes that the reference temperature for the geometric specifications of products must be 20 °C.
Metrological traceability chain
In metrology or the science of measurements, traceability is the ability to relate the results of an individual measurement to national or international standards through an uninterrupted chain of comparisons, called a traceability chain (VIM 2012)
No measurement is completely accurate. Any kind of instrument or equipment, even if it is perfectly used , can only record a measurement with limited accuracy and precision. Therefore, every measurement has a degree of uncertainty, which indicates the quality of the result.
An accredited laboratory can ensure the accuracy of its measurements through traceability because its standards are calibrated with precision and accuracy.
Measurements should be as accurate and precise as possible. But how can a laboratory guarantee that the result of a measurement has a certain degree of uncertainty? This is precisely the purpose of traceability.
Therefore, the breaking point to keep in mind to check if a calibration provides metrological traceability are:
- Documented calibration procedure
- calibration chain
- Provider’s technical competence
- Intervals between calibrations
- Uncertainty calculation
Metrology and Quality Inspection Room at Asimer Group
Our Metrology room is controlled at constant temperature (20º C) and humidity (70%) for the control of very high smooth measurements according to the following criteria;
In measurements, the range refers to the interval of values of a measure that a certain instrument is able to measure. For example, if a thermometer measures between -30ºC and 50ºC its range is 80º.
A larger range will make the measuring instrument a more versatile product.
The range is a variable that depends directly on the use of the instrument. We will not need an equal range if we want to measure the interior ambient temperature, the exterior ambient temperature or the cooking temperature of a food inside the oven.
The resolution is the minimum variation of the measured magnitude that gives rise to a perceptible variation of the indication of the corresponding value. In other words, the resolution indicates the minimum value from which we will notice a variation or jump in the measurement of what we are measuring.
For example, if the resolution of a thermometer is 1ºC, the measurement will be 1,2,3,4,5… and so on. If the resolution is 0.5ºC, the measurement will be 0; 0.5;1;1.5; two; 2.5; etc… The resolution is independent of the range, but it is true that instruments with a greater range have a lower resolution, both in analog and digital levels.
In digital instruments, the resolution is always higher than in analogic instruments. It is common for digital instruments to display decimal (0.1), centesimal (0.01), thousandths (0.001) or even lower measurements. The resolution is related to the sensitivity of the instrument.
The Calibration of a Measurement Equipment consists of the comparison between the value measured by a Standardized pattern and the value given by the Measurement Equipment by a method that guarantees metrological traceability to a standard formally recognized by the «International Bureau of Weights and Measures» (BIPM).
Metrology at Asimer Group
Asimer Group recognizes the importance of metrology and our customers trust us for using high quality measurement instruments and technologies backed by the latest metrology knowledge. Our Metrology rooms helps us to minimize the product measurement uncertainty and ensures the continuous development of our in-house testing capability. We ensure accurate measurements as we maintain and develop continuous improvement.
We are specialized in accuracy check control, maintaining the required temperature and humidity control.
Our Metrology room is designed to improve measurement accuracy and reduce measurement uncertainty due to temperature and humidity fluctuations control.
Starting from the previous engineering product to the final machining and/or assembly, Asimer Group works closely with each customer to develop the most appropriate solution for the operational expectatives for each project
If your next project requires working with the best specialists in precision, contact us and our team will contact you.