test chamber Articles

  • A Clay Calibration Chamber for Testing Field Devices

    This paper describes the design of a calibration chamber suitable for the preparation of uniform clay beds in which the performance of full-size field test devices may be studied. Details are given of the clay bed preparation procedure by which clay slurry is initially consolidated under K0 conditions and then further conso using equal or unequal horizontal and vertical stresses. Field equipment ...


    By ASTM International

  • Uniformity Tests in Calibration Chamber Samples by the Thermal Probe Method

    The calibration of geotechnical instruments for in-situ tests, performed on sand samples reconstituted in huge calibration chambers (CC), requires the reproduction of large specimens at given relative densities with good repeatability and satisfactory homogeneity. A test method has been developed with the purpose of evaluating the relative density, DR, in different locations of the CC samples ...


    By ASTM International

  • Preparation of Large-Size Cohesive Specimens for Calibration Chamber Testing

    This paper describes the design of an automated slurry consolidometer and calibration chamber system used to prepare largesize cohesive soil specimens for testing in-situ devices, model foundations, and ground anchors. A two-stage technique for the preparattion of homogeneous cohesive specimens subjected to a known stress history is described. Briefly summarized are the data acquisition/control ...


    By ASTM International

  • 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

  • Use of an exposure chamber to maintain aqueous‐phase nanoparticle dispersions for improved toxicity testing in fish

    A novel chamber for maintaining aqueous phase dispersions of nanoparticles (NPs) to enable improved toxicity testing in larval zebrafish was developed. Aqueous concentrations were within 80% of initial NP concentrations, and 96‐h LC50 values were highly reproducible (coefficient of variation ...


    By John Wiley & Sons, Ltd.

  • Environmental Chamber Temperature Calibration: Which Method to Use?

    Calibration of environmental simulation temperature test chambers is anything but simple. This article addresses factors that complicate attempts to calibrate these machines, and discusses strengths and weaknesses of various calibration approaches. Keywords: Temperature chamber, calibration, temperature, oven, temperature accuracy, temperature ...

  • Measurement of In Situ Density of Sand in a Chamber by Using a Thermal Conductivity Penetrometer

    Reliable in situ testing during soil exploration is of great help to geotechnical engineers in design considerations. This paper describes the theory and the laboratory test results for determination of the density of a sand with a quasi-static penetrometer by measuring its thermal conductivity. Effects of disturbance caused by the penetrometer have been studied. It is shown that it is possible ...


    By ASTM International

  • LiQuilaz® S05 Thermal Test

    Abstract Optical particle counters such as the LiQuilaz® II S05 from Particle Measuring Systems are used in a variety of environments that may experience fluctuations in ambient temperature. An additional temperature effect comes from the LiQuilaz itself, which generates heat due to warming of its internal components. Particle Measuring Systems tested the LiQuilaz S05 ...


    By Particle Measuring Systems

  • Fabrication of Silty Sand Specimens for Large- and Small-Scale Tests

    In the course of research concerning the relation of cone penetration results and liquefaction resistance, it was necessary to develop a reliable method for preparation of silty sand specimens for laboratory triaxial testing (3.6 by 7.1 cm in diameter) and for a large-scale calibration chamber (1.5 by 1.5 m in diameter). The objective was to simulate the in situ soil fabric and to allow for ...


    By ASTM International

  • Horizontal and Vertical Swell Pressures from a Triaxial Test: Feasibility Study

    Horizontal and vertical swell pressures of some anisotropic undistrubed soil specimens are measured in a double chamber triaxial cell. The equipment is also capable of measuring consolidation and strength parameters of the soil. Preliminary test results indicate no difference in swell pressure between vertical and horizontal orientations of the specimen when subject to no volume ...


    By ASTM International

  • On Some Issues in Triaxial Extension Tests

    Results of triaxial extension tests on dry sand are presented. Special attention is paid to the factors influencing the results in triaxial extension tests. It is found that factors such as accuracy of the axial force measurement, axial force carried by the rubber membrane surrounding the specimen, gravity, and inhomogeneous deformation have a much larger influence on the results in triaxial ...


    By ASTM International

  • Over the River and Through the Plants to Richland Chambers We Go

    ABSTRACTIn order to meet future water supply requirements, Tarrant Regional Water District is pursuing several options including diverting Trinity River water into two of the District’s reservoirs located downstream of the Dallas-Fort Worth Metroplex. The District’s approach to augment the water supply with reclaimed water involves a multiple-barrier approach including advanced wastewater ...

  • Experimental study of the performance of a siphon sediment cleansing set in a CSO chamber

    Model experiments were conducted to investigate the performance of a siphon sediment cleansing set (SSCS) for preventing sediment deposition on the combined sewer overflow (CSO) chamber bottom. The results confirmed the effectiveness of siphon suction in sediment removal in the chamber. The sediment scour test revealed that the equilibrium scour depth correlated significantly with the ...


    By IWA Publishing

  • Delivering automation to test stations - Case Study

    CeraMem Corporation is a developer of metal oxide gas concentration sensors in Waltham, MA. Their test engineers required mass flow controllers that were easy to intregrate and calibrate. They also demanded fast response and high accuracy in order to reduce test cycle length and improve the quality of the data. Test station requirements demanded that controllers were capable of adjusting ratios ...


    By Sierra Instruments, Inc.

  • ESTECH marks twentieth year with new acoustic testing site

    Situated less than 40 km from the centre of Tokyo, the two storey building has a hemi-anechoic chamber, an excitation test room and an associated test preparation room. The excitation test room, which can be flexibly partitioned, contains two structural beds isolated from external vibration. And two cranes capable of lifting up to 2.8 tonnes, for moving heavy structures such as engines, tractor ...

  • A review on 'failure pressure prediction of composite pressure chambers using acoustic emission technique'

    Over the last four to five decades, application of fibre-reinforced plastics have seen tremendous growth. In spite of the complexity of their behaviour, development of composite pressure chambers has significantly contributed to the spectacular progress in the strength to weight ratio. This paper presents an overview on the acoustic emission (AE) developments towards failure pressure prediction ...


    By Inderscience Publishers

  • Chevy volt battery durability testing

    Accelerated Lifetime Tests   Hybrid power technology development is ramping up globally in today’s ultra competitive automotive industry – and these technologies of the future demand vibration test solutions that can efficiently perform accelerated lifetime tests even on large and fully operational assemblies. General Motors’ 3000 sq.m battery test ...

  • Multiphase modeling study for storm water solids treatment in experimental storm water settling chamber

    This study tests four different types of multiphase models to determine the most appropriate model for predicting the behaviors of various types of storm water solids in a settling chamber. The Lagrangian reference frame discrete phase models of uncoupled and coupled models based on the interaction between the discrete phase and the continuous phase were tested. The rigid moving objects model ...


    By IWA Publishing

  • Permeation testing of flexible food packaging films - Case Study

    FFP Packaging Solutions specialise in high quality printed and plain flexible packaging, heat seal lidding films and films for high temperature/oven use. Offering the food industry innovative flexible packaging solutions, FFP ensure that all the film materials used have been vigorously tested to ensure that the quality of the packaging is stable when used in different environmental conditions ...


    By Systech Instruments Ltd

  • Case study - Engine test cell exhaust: RTO

    Overview A Mid-western outboard engine manufacturer bought a three year-old plant for the production of its marine engines. When finished, the engines are removed from the assembly line and run for quality control. The 25,000 SCFM of exhaust from testing contains volatile organic compounds (VOCs) that require regulatory compliance. Also within this exhaust is a great deal ...

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