scholarly journals REQUIREMENTS FOR TESTING EQUIPMENT, TESTING METHODOLOGY AND METROLOGICAL TRACEABILITY: REGULATORY AND NORMATIVE SUPPORT

2021 ◽  
Author(s):  
D. Smernnytskyi ◽  
Y. Samus ◽  
O. Biliaieva ◽  
T. Romanova
Keyword(s):  
Measuring Equipment ◽  
Metrological Traceability ◽  
Testing Equipment ◽  
National Standard ◽  
Reliable Measurement ◽  
Research Article ◽  
Measurement Results ◽  
Measurement Methodology ◽  
Accredited Laboratories ◽  
Equipment Testing

In order to obtain reliable measurement results during the conformity assessment of products in the testing laboratory, it is important to provide metrological confirmation of the used measuring equipment. When performing measurements according to the appropriate methodology, it is important to comply clearly with the requirements for measuring equipment, conditions, sequence of measurement operations, the qualifications of specialists. Research article considers the general requirements for testing equipment and measurement methodology in accordance with the national standard DSTU ISO / IEC 17025: 2017.Several requirements to the equipment and methodology of confirming their suitability by calibration and verification are analyzed. For accredited laboratories the calibration of measuring equipment, that affects the reliability of obtained results, is mandatory; testing equipment that does not perform measuring functions, must be checked for the compliance with the technical characteristics set out in the testing methods. The requirements for measurement methodology and methods of their suitability confirming through verification and validation are analyzed. The main risks of testing laboratories in the performance of measurements have been identified.

scholarly journals Comparison tests for the determination of the viscosity values of reference liquids by capillary viscometers and stabinger viscometer SVM 3001

2018 ◽  
Vol 9 ◽  
pp. 7 ◽  
Author(s):  
Gokce Sevim Sariyerli ◽  
Orhan Sakarya ◽  
Umit Yuksel Akcadag
Keyword(s):  
Viscosity Measurement ◽  
National Standard ◽  
Measuring Range ◽  
Primary Level ◽  
Low Viscosity ◽  
Measurement Results ◽  
Accredited Laboratories ◽  
Primary Standards ◽  
Capillary Viscometers

The present study was realized for measuring viscosities of reference liquids using capillary viscometers and Stabinger viscometer SVM 3001 with viscosity interval between 1 mm2/s and 5000 mm2/s with temperatures from 20 °C to 80 °C. Based on our measurement with various liquids, we determine the viscosity values and compare both of the results. The aim of this study to evaluate the results of the primary level viscosity measurement system and stabinger viscometer and to compare the measurement results due to the providing traceability of Stabinger viscometer by TUBITAK UME. An increasing number of national metrology institutes and accredited laboratories provide viscometer calibration with reference liquids in a wide viscosity range. It is a common practice to use the viscosity of water as the metrological basic of viscometry. The national standard of viscosity provided by TUBITAK UME consists of a set of ubbelohde viscometers covering the measuring range of kinematic viscosities from about 0.5 mm2/s to 100 000 mm2/s. At the low viscosity, long − capillary viscometers are used as primary standards which are directly calibrated water.

scholarly journals JUSTIFICATION OF TENSORISTOR CALIBRATION IN A COMPLEX WITH MEASURING EQUIPMENT

2021 ◽  
pp. 75-85
Author(s):  
Nataliia Fidrovska ◽  
Roman Ponomarenko ◽  
Evgen Slepuzhnikov ◽  
Dmytro Kozodoi
Keyword(s):  
Strain Gauge ◽  
Output Signal ◽  
Measuring Equipment ◽  
Functional Relationship ◽  
Experimental Studies ◽  
Strain Gauges ◽  
Strain Gages ◽  
Reliable Measurement ◽  
Complex Design ◽  
Measurement Results

The article describes the process of calibrating strain gauge and measuring equipment. Modern machines have a complex design of the shapes of parts and assemblies. The loads acting on them often do not allow the determination of the stress state by modeling or calculation when creating these structurally complex machines. Therefore, conducting experimental studies using the strain gauge method is an extremely important task in real time. But for such a study, it is necessary to calibrate the strain gauges. Calibration must be performed to determine the functional relationship between the load applied to the part to be tested and the equipment output. Depending on the size, as well as the configuration and other features of the investigated part, several methods of calibration of strain gages are used: direct and indirect. To obtain reliable measurement results, the calibration conditions should differ as little as possible from the conditions of experimental studies of the tested parts. Calibration must be performed to determine the functional relationship between the load applied to the part to be tested and the equipment output. Depending on the size, as well as the configuration and other features of the investigated part, several methods of calibration of strain gages are used: direct and indirect. To obtain reliable measurement results, the calibration conditions should differ as little as possible from the conditions of experimental studies of the tested parts. Calibration consists in finding a functional relationship between the load acting on the tested part and the output signal of the equipment. To do this, creating previously known loads on the part on which the strain gauges are glued, and comparing the value of these loads with the intensity of the output signal, their ratio is determined analytically or graphically. Electrotensometry uses bridge and half-bridge measurement circuits. The half-bridge circuit is widely used, especially in static processes, where one strain gauge is active, and the other is located in the area of the load and is used for temperature compensation. 

Problems of ensuring metrological traceability of measurement results of indicators of quality for food products and food raw materials

2020 ◽  
pp. 64-70
Author(s):  
Mariya Y. Medvedevskikh ◽  
Anna S. Sergeeva
Keyword(s):  
Reference Materials ◽  
Mass Fraction ◽  
Nutritional Value ◽  
Animal Feed ◽  
Raw Materials ◽  
Meat Products ◽  
Metrological Traceability ◽  
Food Products ◽  
Freeze Dried ◽  
Measurement Results

The article raises the problem of ensuring metrological traceability of the measurement results of indicators of quality and nutritional value for food products and food raw materials: water (moisture), nitrogen (protein, crude protein), fat, ash and carbohydrates. The problem under consideration can be solved by applying reference materials of food composition, traceable to state primary measurement standards GET 173-2017 and GET 176-2019 and primary reference measurement procedures (PRMP), for attestation of measurement procedures and accuracy checking of measurement results. The article discusses the results of the PRMP development of mass fraction of fat, ash and carbohydrates in food products and food raw materials, as well as mass fraction of crude fat (oil content) in oil crops seeds and products based on them. The paper also presents metrological characteristics of reference materials of composition of dry dairy products, grain-milk dry porridges for nutrition of babies, grain dry porridges for nutrition of babies, egg powder, freeze-dried meat products, animal feed. The results of the work allow for building a chain of metrological traceability from GET 173-2017, GET 176-2019 and PRMP to routine measurement procedures, thereby ensuring the uniformity of measurements of nutritional value of food products.

Application of Measuring Capability Index in the Export of the Measurement Requirement

2014 ◽  
Vol 530-531 ◽  
pp. 101-104
Author(s):  
Jin Hai Li ◽  
Da Wei Wang
Keyword(s):  
Product Quality ◽  
Measuring Equipment ◽  
Measurement Process ◽  
Ambient Conditions ◽  
Measurement Capability ◽  
Capability Index ◽  
Measurement Results ◽  
System Use ◽  
Incorrect Measurement ◽  
Intended Use

Measurement process is a specific process to support product quality, and export measurement requirements is the beginning of the measurement process control, it is important to achieve the goals of product quality and manage risk of incorrect measurement results. Measurement requirements, including the requirements for the measurement process and the requirements for measuring equipment, measuring requirements, measuring staff, measurement method, ambient conditions and the measured object as a system, use Measurement Capability Index, quantitatively export measurement requirements of measurement processes and measuring equipment to ensure that measurement processes and measuring equipment satisfy the intended use, make the process of measurement requirement derived more scientific and more standard.

ISO 9001 and ISO/IEC 17025

2017 ◽  
Vol 34 (3) ◽  
pp. 406-417 ◽  
Author(s):  
José Barradas ◽  
Paulo Sampaio
Keyword(s):  
Measuring Equipment ◽  
Iso 9001 ◽  
Structured Interviews ◽  
Quality Management Systems ◽  
Content Type ◽  
Customer Perception ◽  
Accredited Laboratories ◽  
The Impact ◽  
Level Of Importance

Purpose According to the ISO 9001 standard, all the certified companies should calibrate their measuring equipment. By doing so, companies can guarantee, with rigor and quality, its measurement and use reliable data for monitoring the quality of their products. However, a metrology laboratory is not required to have an ISO 9001 certification or ISO/IEC 17025 accreditation. At this moment, there are companies with their quality management systems certified according to the ISO 9001 standard which have metrology laboratories to make internal checks of their measuring equipment. On the other hand, there are companies with ISO/IEC 17025-accredited laboratories. Finally, there are companies that have their QMS certified according to ISO 9001 and also their metrology laboratory accredited by ISO/IEC 17025. In this case the metrology laboratory must comply with the requirements of both standards. Thus, the purpose of this paper is to analyze the level of importance of the ISO 9001 and ISO/IEC 17025 standards from the perspective of a metrology laboratory. Design/methodology/approach The research methodology used to conduct this research was supported in case studies that had been carried out in nine metrology laboratories. The information was gathered based on semi-structured interviews. Findings After an analysis and discussion over the data obtained, the authors verified that the impact on customer perception is significantly positive, if the metrology laboratory is simultaneous certified and accredited. Originality/value From the laboratories perspective, the issue analyzed in this paper is of the utmost importance and the aim is to give the contribution in order to clarify this kind of organizations of which could be the best option for their context.

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