calibration standard Articles

  • Simultaneous determination of PM fractions, particle number and particle size distribution in high time resolution applying one and the same optical measurement technique

    Abstract The Fidas fine dust monitoring systems comprise an optical aerosol spectrometer, which is characterized by very good instrument characteristics, and utilize a sophisticated approach to convert the measured information on particle number and particle size into mass concentrations. As monitoring of PM requires reliable and quality-controlled performance of the measuring systems, ...


    By Palas GmbH

  • The productive environmental laboratory: BSK Labs boosts efficiency with Metrohm IC

    BSK Labs runs a number of environmental laboratories and service centers along the west coast of the US. A total of 70 employees – including microbiologists, chemists, lab technicians, and support staff – make sure that the 200 to 350 samples that come in every week are analyzed. BSK Labs specializes in potable water chemistry, ground water monitoring, storm water runoff, solid waste ...


    By Metrohm AG

  • Two Detector Solution to Analyzing Sulfur

    Sulfur compounds are reactive, corrosive to pipes, and destructive to catalysts in petroleum refineries. Sulfur emission are strictly regulated globally. When released into the atmosphere sulfur dioxide converts to sulfuric acid resulting in adverse effects on human health and the environment. Sulfur detection is found useful in many other industries; therefore, detection of sulfur compounds in ...


    By Restek Corporation

  • Primary Standard Gas Flow Calibration—The Only Guarantee of Accuracy

    At Sierra, we have a saying: “An instrument’s accuracy is only as good as its calibration.” The accuracy of your mass flow controller (MFC) is essential in assuring the efficiency, performance, and quality of your flow meter. In many cases, if your instrumentation is not calibrated, then a decline in performance is possible due to ...


    By Sierra Instruments, Inc.

  • Recommendations for Implementing a Calibration Program

    Introduction This article is limited to the principles of organization for calibration work in relation to cGMP and other pharmaceutical standards. Calibration and metrology methods related to actual calibration techniques, statistics, and theories are not explored in our discussions.1 Each class of instruments requires specific techniques and approaches to achieve stated accuracies. All ...


    By Prime Technologies, Inc.

  • Design of a Large Calibration Chamber

    The design and operation of a conceptually simple, low-cost chamber for calibration of cone penetrometers and other in situ devices is described. The chamber weighs over 5500 kg and houses a 4400-kg soil sample that is 1.5 m in diameter and height. Operations in the chamber are automated using a self-equilibrating hydraulic insertion frame, a soil pluviation system for sand placement, a vacuum ...


    By ASTM International

  • Procedure for calibration of micropipettors

    PURPOSE: Good Laboratory Practice dictates that all equipment used for the generation, measurement or assessment of data shall be adequately tested, calibrated and/or standardized. A procedure describing a pipettor calibration method, records of test performance and repairs should be available for laboratory personnel. This procedure describes a method for evaluating the accuracy and ...


  • Why calibrate PULSE?

    This famous remark emphasises the importance of measurement in the world of science, industry and commerce. We all use and depend on it daily, in even the most mundane aspects of life – from setting your wristwatch to the radio time signal, to filling the car fuel-tank, or checking the weather forecast. All of these things depend on proper calibration and traceability to national and ...

  • Balance Calibration – what are the options?

    Balances are relied on in most laboratories and industrial sites for a range of experiments and everyday quality control or operational work. Keeping your balance regularly calibrated is essential to ensure the readings they give are accurate. This does not need to mean a costly visit from an external contractor, as many balances are easily calibrated in house. ...


    By Camlab Limited

  • Example of an Energy Calibration Report on a Standard Penetration Test (ASTM Standard D 1586–67) Drill Rig

    This note provides an example of an energy calibration report on standard penetration test equipment. This calibration was designed to determine a standard hammer drop height that would produce 2100 in.·lb (237 N·m) of compression wave energy entering the drill rods as a result of the average hammer blow when using drop procedures as ordinarily used for the rig under ...


    By ASTM International

  • Improved Calibration and Correction Techniques for Pressuremeters

    Equipment calibration is essential to the pressuremeter test procedure in order to obtain meaningful results. This paper assesses the accuracy of the standard calibration procedures for a monocell pressuremeter probe. The probe was inserted into sets of instrumented aluminum tubes of various lengths and diameters. The pressure distribution acting against the cavity wall was determined for ...


    By ASTM International

  • Calibration – the sure way to accurate measurements

    Calibration   During testing, microphones and accelerometers can change sensitivity or break. They might look intact, but what happens if you continue measuring without having calibrated your transducer? Can you trust your data? Do you have to redo the entire test? In cases of extreme testing you might only have one shot at getting your measurement right as the product gets ...

  • The Cost of Inaccurate CEM Calibration Gases

    Utility companies and other users of Continuous Emissions Monitoring (CEM) calibration gases often mistakenly consider them a commodity, making price the primary purchase consideration. Consequently, many are willing to settle for calibration gases that are ...

  • Specification and calibration requirements for industrial scales in pharmaceutical applications

    Introduction Performance and accuracy of industrial scales in pharmaceutical applications are covered by current Good Manufacturing Practices (cGMPs). Verification of proper operation of process scales is an important factor in finished product Quality Assurance (QA) programs. Incorrect weighing, additions of materials and components in validated processes of formulation, dispensing, and ...


    By Prime Technologies, Inc.

  • Helical Probe Tests: Initial Test Calibration

    Helical test probes of different sizes suitable for shallow (1.8-m) in-situ soil exploration and compaction control were developed and tested in different soils alongside traditional in-situ tests, including Standard Penetration tests (SPT), cone penetration tests (CPT), dilatometer tests (DMT), and in-situ density tests. The helical probe test (HPT) is a quick and economical test, which can be ...


    By ASTM International

  • Environics - Reducing calibration gas cost by up to 60%

    EPA's appendix 'M' 40 CFR 51 reduces calibration gas cost by 60%By: Terrence P. Dunn, President of EnvironicsOn May 30, 1995, the EPA published the final version of Method 205 for inclusion in Appendix M of 40 CFR Part 51 entitled, 'Verification of Gas Dilution Systems for Field Instrument Calibrations.' Continuous emissions monitoring systems (CEMS) require ...


    By Environics, Inc.

  • Scale calibration techniques: which method is right for you?

    To achieve optimum performance of an electronic weighing system, accurate calibration of the system and correct selection of the load sensors, mount- ing hardware, and other installation assemblies are essential. During installation, the accuracy of the system may be affected by external factors such as restraints caused by the addition of process piping, surrounding equipment such as motors and ...


    By Hardy Process Solutions

  • Calibrated aerial photos ease noise mapping

    Calibrated Aerial Photos Ease Noise Modelling For smaller projects or where geographical vector data is missing, using aerial photos is an elegant solution for helping build environmental noise calculation models. With Predictor 7810’s new GeoReference function, aerial photos and map images can be easily calibrated according to your local coordinate system. The coordinate ...

  • Calibration of an alpha particle irradiator for in vitro cells irradiation

    An alpha particle irradiator using 210Po radioactive sources was calibrated under specific conditions for cell irradiation. The energy spectrum of α-particles hitting the cell monolayer was measured by a surface barrier detector. The simulation of the results obtained with this detector was performed using the MCNPX Monte Carlo code with the same conditions ...


    By Inderscience Publishers

  • Calibration stability of the sievers 900 series TOC analyzers

    Objective One of the advantages of the membrane conductivity measurement system employed in the Sievers 900 Series TOC Analyzers, compared to other TOC analyzers, is the excellent stability of the calibration. To illustrate this, a series of tests were conducted on three 900 Series analyzers over the course of a 14-month period and the results are  summarized in this report . The 900 ...


    By GE Analytical Instruments

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