The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In these latter decades, precise instrumental analysis methods and equipments can be used to determine the chemical parameters which in turn would increase the analysis efficiency by tenfold. Just part of standardized methods has full descriptions that allow get correct evaluation of final measurement result. The influence of separate stages has to be determined estimating the uncertainty of measurement...
To provide insights for analysis of international key comparisons (KCs) in mass metrology, we have estimated previous KCs with Monte Carlo simulation. Two similar previous KCs in mass metrology of 50 kg scale were taken in this work as the typical example. The key comparison reference value was evaluated with several popular estimators as well as median in this analysis. Their various uncertainties...
Ultrasonic power generated by an ultrasonic transducer must be measured and declared for the ultimate safety of patients. According to IEC-61161 radiation force balance is internationally recommended primary method for measurement of total, time averaged ultrasonic power radiated by transducer. In a manual RFB system, the output of microbalance is recorded manually at no radiation force and after...
This paper presents an automated vision based measurement system for two wheeler engine crankshafts. The system is able to perform the measurements within an accuracy of ±10 µm. Two setups are arrived at for measuring different parameters and the measurement software is developed. The results from the vision system are compared with readings from conventional measuring equipments and accuracies achieved...
Many instruments used for measuring of moisture content in solid materials, such as thermobalances and Karl Fisher titrators, require calibration or verification. The calibration could be performed by using some hydrated ionic compounds [such as lactose monohydrate, sodium tartrate dihydrate (STDH), potassium citrate monohydrate (PCMH), among others], which require the certification in their moisture...
Swelling urban populations and increased concentration of automobile traffic in and around cities have resulted in severe air pollution, threatening human health and undermining the productivity of the urban population. Air quality modelling is one of the important components of urban air quality management (UAQM). This paper contains comparative performance results of three most used commercial air...
The present investigation discusses an in-depth retrospective study of different aspects of force measurement. The paper discusses the different force realizing methods (machines) like dead weight force machines, hydraulic amplification force machines as well as recently developed low force standard machine. Different types of force measuring instruments (transducers) like ring shaped force transducers,...
The reported work is the part of the establishment of metrological traceability of high frequency impedance standards at CSIR-NPL. The evaluation of three terminal GR 1404 type air capacitance standards of nominal values 100 and 1000 pF has been completed using electrical equivalent circuit model. This involves the measurement of reference capacitance at 1 kHz and residual parameters which are capacitive...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.