In the transfer calibration of heat flux sensors, a correction for the irradiance distribution across the sensing area may be required when the sensing areas of the reference and test sensors are different. A method to calculate this correction using well-known equations for the configuration factors is presented. Also, estimates of the correction for test conditions corresponding to the transf...

The cinema industry standards for the calibration of both commercial cinemas and professional dubbing theatres seem, to a growing number of professionals, to be lagging behind the current state of the art for achieving both better overall sound quality and better room-to-room compatibility. In a presentation in late 2010 to the UK's Institute of Acoustics [1] it was clearly shown how the curren...

In this paper, a new theoretical analysis of the fourstandards line-reflect-reflect-match (LRRM) vector network-analyzer (VNA) calibration technique is presented. As a result, it is shown that the reference-impedance (to which the LRRM calibration is referred) cannot generally be defined whenever nonideal standards are used. Based on this consideration, a new algorithm to determine the on-wafer...

Background: The effectiveness and safety of brachytherapy treatment is mainly concerned with the calibration of sources and their traceability to internationally accepted Standards. Secondary Standard Dosimetry Laboratory (SSDL) does not offer calibration of ionization chambers with gamma-ray spectrum of high dose rate source 192Ir . This work has been carried out to calibrate the high dose rat...

A growing number of measurements in commercial and industrial sector needs to refer to the traceability to the national (and also international) standards. Since the internet-enabled metrology is rapidly developing in the recent years, it offers new possibilities for calibration services. This paper focuses on the problem of the visualization of the internet-enabled calibration process and inst...

Automating fatty acid derivatization and preparation of calibration standards on an Agilent 7696A Sample Prep WorkBench for fatty acid methyl esters (FAME) analysis can provide comparable precision, better recoveries, and more accurate calibration compared to manual procedures. Hands-on time, reagent usage, and exposure to hazardous chemicals are all greatly reduced. This automated approach has...

Horizontal standard lamps calibrate the spectral irradiance responsivity of spectroradiometers that measure solar ultraviolet irradiance. A field calibration unit and power supply developed to meet the requirements for using these standards in the field are described and their operation and associated uncertainties are detailed. Results from assessments obtained at two field instrument intercom...

The quantitative analysis of glutathione (GSH) is important in different fields like medicine, biology, and biotechnology. Accurate quantitative measurements of this analyte have been hampered by the lack of well characterized reference standards. The proposed procedure is intended to provide an accurate and definitive method for the quantitation of GSH for reference measurements. Measurement o...

Until the late 1980’s electrical calibration systems used to compare primary and secondary voltages and resistance standards consisted of several different components. Systems like the Fluke 7105A and the Datron 4900 were the backbone of the majority of electrical calibration laboratories the world over. These systems were specifically combined to provide a traceable source, according to a set ...

This paper gives the results of an intercomparison of the calibration results for four specific absorption rate (SAR) probes as measured by three independent laboratories. The artefact standards used for the calibration were matched waveguide cells that generate a calculable SAR level in a liquid phantom, and these systems are described, together with the measurement uncertainties. The results ...