Development of a Method for Verification of API Thread Measurement Results by Comparing Them with Measurement Results of Reference Measuring Instruments

2021 ◽  
pp. 344-352
Author(s):  
D. S. Lavrinov
Keyword(s):  
Measuring Instruments ◽  
Reference Measuring ◽  
Measurement Results

scholarly journals The Manufacturing of Low Temperature Measuring Devices Using a PT-100 Sensor Based on ATmega328 Microcontroller

2020 ◽  
Vol 21 (1) ◽  
pp. 26
Author(s):  
Bhakti Hardian Yusuf ◽  
I Made Satriya Wibawa ◽  
I Ketut Putra
Keyword(s):  
Low Temperature ◽  
Coefficient Of Determination ◽  
Measuring Instruments ◽  
Measured Temperature ◽  
Measuring Instrument ◽  
Reference Measuring ◽  
Measuring Device ◽  
Temperature Measuring ◽  
Measurement Results ◽  
Reference Measuring Instrument

A low temperature measuring device has been successfully developed using a microcontroller-based PT-100 sensor ATmega328. The temperature is measured using a PT-100 sensor, as the main processor using the ATmega 328 microcontroller, and the measured temperature is displayed on a 2x16 LCD. The results of the calibration at a temperature of 77 - 300 K against the reference measuring instrument obtained that, the ratio of the measured temperature between the reference measuring instrument and the measuring instrument made was 0.9893 ± 3.69 K and the coefficient of determination R2 = 0.9987. This indicates that the measurement results of the measuring instruments made have an accuracy level of 98.93% and a precision of 99.87%. Keywords: Low temperature, PT-100 Sensor, ATmega328 Microcontroller, LCD 2x16

scholarly journals Determination of the Error in Transferring of Length Unit’s Size when Measuring the Nanoparticles’ Diameter Using an Analyzer of Particles’ Differential Electrical Mobility

2021 ◽  
Vol 12 (3) ◽  
pp. 194-201
Author(s):  
V. L. Solomakho ◽  
A. A. Bagdun
Keyword(s):  
Particle Size ◽  
Size Distribution Function ◽  
Measuring Instruments ◽  
Random Component ◽  
Electrical Mobility ◽  
Standard Samples ◽  
Reference Measuring ◽  
Condensation Particle Counter ◽  
Uniformity Of Measurements ◽  
Unit Of Length

The quality of nanomaterials and nanotechnologies is largely determined by the stability of the applied technologies, which, to a large extent, depend on the constancy of particle sizes. In this regard, metrological problems arise that are associated both with measuring the dimensions of the microstructure of aerosols, suspensions and powders, and with ensuring the uniformity of measurements when transferring a unit of a physical quantity from a standard to working measuring instruments. The purpose of this work was to determine and calculate the error in transferring the size of a unit of length when measuring the diameter of nanoparticles.An analyzer of differential electric mobility of particles was determined as a reference measuring instrument for which the calculation was made. It allows the separation of aerosol particles based on the dependence of their electrical mobility on the particle size. In combination with a condensation particle counter, it allows you to scan an aerosol and build a particle size distribution function. This measurement method is the most accurate in the field of measuring the diameters of particles in aerosols, therefore, the error in the transmission of particle size must be set as for a standard.The paper describes the physical principles of measurement by this method and presents an equation for determining the diameter of nanoparticles. Based on this equation, the sources of non-excluded systematic error were identified. Also, an experimental method was used to determine the random component of the measurement error of nanoparticles and to calculate the error in transferring the size of a unit of length when measuring the diameter of nanoparticles.The obtained results will be used for metrological support of standard samples of particle size, ensuring traceability of measurements of aerosol particle counters and for aerosol research.

Comparisons of the reference measuring instruments of surface parameters

Metrologia ◽  
2015 ◽  
Vol 52 (1A) ◽  
pp. 04012-04012
Author(s):  
Vladimir Kupko ◽  
Valeriy Lysenko
Keyword(s):  
Measuring Instruments ◽  
Reference Measuring ◽  
Surface Parameters

scholarly journals The requirements of the international standards on traceability of measurement results at OJSC «BSW – Management Company of Holding «BMC»

2019 ◽  
pp. 70-72
Author(s):  
E. V. Borisenko ◽  
I. V. Buyanova
Keyword(s):  
Metrological Traceability ◽  
International Standards ◽  
Measuring Instruments ◽  
International Level ◽  
Product Testing ◽  
Management Company ◽  
Uniformity Of Measurements ◽  
Effective Functioning ◽  
Measurement Results ◽  
Traceability Of Measurement Results

A serious barrier to the sale of products on the market is the trust in organizations that perform measurements during product testing, as well as calibration (verification) of the used measuring instruments. Confidence and recognition of measurement results at the international level is ensured through an accreditation mechanism. To ensure effective functioning at the international level, accreditation organizations enter into a multilateral agreement that provides for the use of common standards in the conduct of accreditation. One of the important requirements of these standards is the implementation and demonstration of metrological traceability, which is a tool for ensuring the uniformity of measurements.

Total haemoglobin – a reference measuring system for improvement of standardisation

2020 ◽  
Vol 58 (8) ◽  
pp. 1314-1321
Author(s):  
Denis Grote-Koska ◽  
Rainer Klauke ◽  
Patricia Kaiser ◽  
Udo Kramer ◽  
Rainer Macdonald ◽  
...  
Keyword(s):  
Measurement Uncertainty ◽  
Measurement Range ◽  
Measuring System ◽  
Measuring Instruments ◽  
National Metrology Institute ◽  
Reference Measuring ◽  
Target Values ◽  
Method Optimization ◽  
Total Haemoglobin ◽  
Hb Concentration

AbstractBackgroundTotal haemoglobin (Hb) concentration in blood belongs to the most requested measurands, and the HiCN method (hemiglobincyanide) is accepted as a reference. Although the reaction principle is clearly characterised, measurement conditions and settings are not consistently defined, some of them influencing the results. An improvement of standardisation is the object.MethodsAfter method optimization, measurement results between different calibration laboratories (CL) were compared with each other and also with results of the National Metrology Institute of Germany (PTB), with target values of certified reference material, within the RELA scheme, and to >1500 results from routine laboratories.ResultsOverall deviations between three CLs were ≤0.5% (n = 24 samples) in a measurement range of 20 g/L to 300 g/L. A CV of 0.4% was determined in pooled blood (1 year long-term imprecision, 99.0%–101.1% recovery of the mean). For selected measurements (n = 4 samples) the PTB participated without significant differences to three CLs, and no significant differences were observed comparing CLs to certified values of reference materials. The expanded measurement uncertainty (probability 95%) was estimated as 1.1%.ConclusionsA reference measuring system, comprising measuring instruments and other devices, including reagents and supply, to generate reference measurement values for total Hb concentration of high accuracy and low measurement uncertainty is presented. Measurement parameters are investigated and defined. The reference measuring system is ready to offer service to EQA providers and to the IVD industry for certifying control materials or calibrators.

Major problems of microclimate indicator measurements indoors of residential and public buildings and ways to solve them

2021 ◽  
Vol 61 (5) ◽  
pp. 334-339
Author(s):  
Vladimir E. Kriyt ◽  
Yuliya N. Sladkova ◽  
Olga V. Volchkova
Keyword(s):  
Objective Assessment ◽  
Measuring Instruments ◽  
Public Buildings ◽  
State Register ◽  
Industrial Buildings ◽  
Guidelines Development ◽  
Measurement Results ◽  
Scope Of Application ◽  
Measurement And Evaluation ◽  
Standard Sets

Human health and efficiency are largely determined by the microclimate conditions and the air quality in residential, public and industrial buildings in which people spend a significant amount of time. The existing methods of measuring microclimate indicators largely do not correspond to the changed regulatory framework, do not fully reflect all the stages of measurements, have contradictions and inaccuracies, which leads to errors in the measurement and evaluation of the results obtained. The purpose of this study was to develop guidelines for measuring microclimate indicators in residential and public buildings, leveling the existing contradictions in the current documents and meeting modern requirements. The analysis of the current methodological documents regulating the requirements for measuring microclimate indicators was carried out, the main problems encountered by specialists during measurements and evaluation of laboratory and instrumental studies of the microclimate were identified and systematized. To date, the only methodological document in the field of microclimate for residential and public buildings is GOST 30494-2011 "Residential and public buildings. Indoor microclimate parameters". This standard sets the requirements for the organization of control and allows to measure and evaluate the microclimate in almost any residential and public building. However, the standard presents requirements for measurement conditions that are practically unrealizable for many regions of Russia, unreasonably high requirements for measuring instruments (MI), which do not allow to take measurements by MI included in the State Register and having the appropriate scope of application, insufficient requirements for the criteria for the selection of premises and their preparation for an objective assessment of the microclimate parameters, inaccuracies in the presented formulas for calculating the resulting room temperature and inconsistencies in individual paragraphs of the document. There are also no requirements for processing and presenting measurement results. In this situation, the development of a methodology for measuring microclimate indicators in residential and public buildings is extremely relevant. This paper presents the main provisions of the developed draft methodology for measuring microclimate indicators in residential and public buildings at different stages of operation of research objects. The developed procedural guidelines determine the order, conditions for carrying out and minimum scope of instrumental control required for microclimate parameters in residential and public buildings that meet the requirements of sanitary legislation. In the process of procedural guidelines development inconsistencies and discrepancies of current procedural documents were considered as much as possible.

MODELING OF STATIC CHARACTERISTICS OF PNEUMATIC STRAIN GAUGE TRANSDUCER

2019 ◽  
pp. 48-52
Author(s):  
A. P. Vasytenko ◽  
A. Yu. Tarakhovskiy
Keyword(s):  
Strain Gauge ◽  
Electrical Signal ◽  
Design Parameters ◽  
Measuring Instruments ◽  
Static Characteristics ◽  
Air Jet ◽  
Jet Impact ◽  
Measurement Results ◽  
Strain Gauge Transducer ◽  
Processing Of Measurement Results

Measuring instruments that implement the pneumatic principle of measurement, have a number of significant advantages: small dimensions of the measuring equipment, allowing to produce multiparameter control in a limited size of the working area, insensitivity to vibration, simplicity of design and reliability. The disadvantage of pneumatic converters is a discrete output electrical signal, which does not allow the processing of measurement results. In this regard, it seems appropriate to investigate the pneumatic-electric Converter, which includes a jet pneumatic and differential strain gauges, which allows to obtain an analog electrical signal at the output. The article describes the design and principle of operation pneumoenteritis Converter to control the diameter of the part. Pneumotensometric Converter converts the change in the diameter of the part in the movement of the nozzle, which causes a change in the force of the air jet on the beam, its deformation and, accordingly, a change in the resistance of he strain gauge. An expression describing the stoic characteristic of the transducer and allowing to determine the force of the air jet impact on the load cell from the gap between the nozzle and the beam, the air pressure and the nozzle diameter is given. The results of modeling the static characteristics of the Converter at different combinations of design parameters are given, the values of straight sections of characteristics and sensitivity are determined, their comparative evaluation is given.

scholarly journals Influence of the Phenomenon of Spectrum Leakage on the Evaluation Process of Metrological Properties of Power Quality Analyser

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5338
Author(s):  
Piotr Kuwałek ◽  
Przemysław Otomański ◽  
Krzysztof Wandachowicz
Keyword(s):  
Power Quality ◽  
Experimental Studies ◽  
Evaluation Process ◽  
Uncertainty Budget ◽  
Measuring Instruments ◽  
Simulation Studies ◽  
Research Results ◽  
Class A ◽  
Measurement Results ◽  
Complex Measurement

Power quality assessment is a complex measurement task, requiring the usage of a system with suitable metrological properties. This complex measurement task in the real power grid is performed with the use of power quality analysers that measure and record the parameters determining the power quality. The paper presents selected research results for a class A power quality analyser in the specially prepared measurement system containing measuring instruments calibrated by the Main Office of Measures. The measurement results were completed with a presentation of the uncertainty budget. The influence of the phenomenon of spectrum leakage on metrological properties of the tested power quality analyser was considered in the paper. To assess this influence, the simulation studies with the use of MATLAB and the experimental studies were carried out for selected test signals. The Metrological interpretation of the research results is presented in the paper.

scholarly journals DESIGN AND DEVELOPMENT OF AIR MONITORING AND QUALITY CONTROL DEVICE USING ARDUINO UNO

2019 ◽  
Vol 1 (1) ◽  
pp. 8-11
Author(s):  
I wayan Sudiardana ◽  
Widodo .
Keyword(s):  
Descriptive Analysis ◽  
Control Device ◽  
Gas Content ◽  
Percentage Error ◽  
Measuring Instruments ◽  
Analysis Method ◽  
Monitoring And Control ◽  
Reference Measuring ◽  
Average Percentage ◽  
Average Percentage Error

LPG (Liquid Petroleum Gas) has been used in everyday life. But if there is leakage it will cause poisoning and explosion. Underlying this, the authors made research on monitoring and control of air quality. The purpose of this study is to make a device that can detect earlier leakage of LPG. This device can detect excess levels of carbon monoxide in the air. Even more, it can avoid the danger of fire and poisoning. The research method used descriptive analysis method and quantitative analysis method. Measurements and testing with accurate reference measuring instruments. Based on testing and analysis, the device can work well with an average percentage error of 1.92% for CO gasmeasurement and 3.1% for LPG gas measurement. Increasing gas content in each sensor is proportional of increasing in the sensor output voltage. Some of the factors that cause errors were the differences of sensor sensitivity and environmental conditions where the sample measured.

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