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  • Calibrating the LISST series instruments | Sequoia Scientific
    size distribution Summation of the uncalibrated size distribution to obtain total uncalibrated concentration Estimation of the calibration constant from a ratio of the uncalibrated total volume concentration to the known concentration in the preparation of the suspension This method provides a black box calibration constant Since the method determines the total particle volume concentration from the measured detailed size distribution the calibration constant remains the same for all sizes in the measurement range A user of the instrument can carry out this procedure by operating the instrument using the LISST standard particles and the auxiliary Mixing Chamber both available from Sequoia as options The essential steps are Obtain a background scatter file using filtered water note allow no bubbles Prepare a suspension of sample particles with a weighed amount of particles added to filtered water then obtain 100 samples scans of scattering data Process the particle datafile in Sequoia s LISST data processing program while temporarily setting the Calibration Constant in analysis software to 1 The result of this processing will be a size distribution file The final step is to Sum the size distribution for each scan A stable average of the total volume concentration is obtained if the test is done with about 50 80 optical transmission and 100 scans of data are stored This uncalibrated mean total concentration when divided by the known input volume concentration in µl l yields the calibration constant Replace this value for 1 as inserted earlier in LISST analysis software The tests can be carried out with microspheres of latex or PVC1 for the simple reason that the underlying physics assumes spherical particles as scatterers When using this calibration constant for estimating concentrations of non spherical particles differences should be expected since the method produces the concentration of equivalent spheres If it

    Original URL path: http://www.sequoiasci.com/article/calibrating-the-lisst-series-instruments/ (2016-02-13)
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  • LISST-SL | Categories | Sequoia Scientific
    List Newsletter Contact Sequoia International Distributors Sequoia Scientific New Product LISST ABS Log In Register Home Article Page 5 News Calibrating the LISST series instruments April 18 2008 Calibrating the LISST series instruments Sequoia April18 2008 this article is identical to Application Note L009 The LISST series of instruments measure particle size distribution i e the volume fraction contained in each of Read more Next More in About About Suspended Sediment Concentration and Particle Sizing Methods Course Staff News PiE Conference 2014 PiE Conference 2014 Customer List Newsletter Contact International Distributors Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST ABS LISST Portable XR LISST Holo LISST Deep LISST StreamSide LISST STX LISST Hydro LISST Infinite LISST VSF LISST STOKES Optical VSF Sensors LISST SL LISST 25X FlowControl Instruments FlowControl Lab FlowControl Sub Radiative Transfer Models EcoLight S HydroLight Accessories How to Buy Request a Quote Terms Of Sale Support FAQ Downloads Warranty Info Installation Requirements Responsibilities Warranty Register a Product Returns Contact Support Library Articles Technical Papers Standards About Staff News Events PiE Conference 2014 Customer List Newsletter Contact Sequoia International Distributors News More News

    Original URL path: http://www.sequoiasci.com/article_category/lisst-sl/page/5/ (2016-02-13)
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  • LISST-STX | Categories | Sequoia Scientific
    7 2008 Agrawal YC Whitmire A Mikkelsen OA Pottsmith HC 2008 Light scattering by random shaped Read more How LISST instruments measure the size distribution and concentration of particles April 18 2008 How LISST instruments measure the size distribution and concentration of particles Sequoia Scientific April 18 2008 article identical to Application Note L001 Rev 10 2006 LISST instruments represent a new generation of systems Read more The size resolution of the LISST series of instruments April 18 2008 The size resolution of the LISST series of instruments Sequoia April18 2008 this article is identical to Application Note L008 The LISST instruments observe the multi angle scattering of light from an ensemble of particles in Read more Calibrating the LISST series instruments April 18 2008 Calibrating the LISST series instruments Sequoia April18 2008 this article is identical to Application Note L009 The LISST series of instruments measure particle size distribution i e the volume fraction contained in each of Read more Matlab processing of LISST ST data April 18 2008 MATLAB processing of LISST ST data Sequoia April 18 2008 this article is based on Application Note L011 The LISST ST is programmed to store data from many successive settling experiments Each settling experiment by default Read more Next More in About About Suspended Sediment Concentration and Particle Sizing Methods Course Staff News PiE Conference 2014 PiE Conference 2014 Customer List Newsletter Contact International Distributors Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST ABS LISST Portable XR LISST Holo LISST Deep LISST StreamSide LISST STX LISST Hydro LISST Infinite LISST VSF LISST STOKES Optical VSF Sensors LISST SL LISST 25X FlowControl Instruments FlowControl Lab FlowControl Sub Radiative Transfer Models EcoLight S HydroLight Accessories How to

    Original URL path: http://www.sequoiasci.com/article_category/lisst-stx/page/5/ (2016-02-13)
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  • Sequoia launches new website! | Sequoia Scientific
    PiE Conference 2014 Customer List Newsletter Contact Sequoia International Distributors Sequoia Scientific New Product LISST ABS Log In Register Home About News Sequoia launches new website Sequoia launches new website August 8 2013 Sequoia Scientific Inc announces the launch of a new and completely redesigned website Have a look around and let us know your thoughts More in About About Suspended Sediment Concentration and Particle Sizing Methods Course Staff News PiE Conference 2014 PiE Conference 2014 Customer List Newsletter Contact International Distributors Categories General News Press Releases Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST ABS LISST Portable XR LISST Holo LISST Deep LISST StreamSide LISST STX LISST Hydro LISST Infinite LISST VSF LISST STOKES Optical VSF Sensors LISST SL LISST 25X FlowControl Instruments FlowControl Lab FlowControl Sub Radiative Transfer Models EcoLight S HydroLight Accessories How to Buy Request a Quote Terms Of Sale Support FAQ Downloads Warranty Info Installation Requirements Responsibilities Warranty Register a Product Returns Contact Support Library Articles Technical Papers Standards About Staff News Events PiE Conference 2014 Customer List Newsletter Contact Sequoia International Distributors News More News PiE 2016 Conference to

    Original URL path: http://www.sequoiasci.com/about/news/sequoia-launches-new-website/ (2016-02-13)
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  • LISST-Portable used by USGS in stormwater research! | Sequoia Scientific
    article in the June 2012 issue of Stormwater the journal for surface water quality professionals which focuses on tools and techniques for monitoring water quality Selbig has invented a new type of sampler for sampling suspended sediments in stormwater drains and the samples are being analysed for particle size using a LISST Portable some times even on site without the need for taking the sample to the lab Says Selbig The LISST Portable was really handy and we re very pleased with the product Sequoia has been very helpful whenever we would have some complications or technical problems It s a very small unit It allows us to take it from one site to the next and get nearly instantaneous results More in About About Suspended Sediment Concentration and Particle Sizing Methods Course Staff News PiE Conference 2014 PiE Conference 2014 Customer List Newsletter Contact International Distributors Categories General News Press Releases Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST ABS LISST Portable XR LISST Holo LISST Deep LISST StreamSide LISST STX LISST Hydro LISST Infinite LISST VSF LISST STOKES Optical VSF Sensors LISST SL

    Original URL path: http://www.sequoiasci.com/about/news/lisst-portable-used-by-usgs-in-stormwater-research/ (2016-02-13)
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  • News | Sequoia Scientific
    can be upgraded Sequoia May 28 2010 SEQUOIA NO LONGER OFFERS LISST 100 OR LISST ST UPGRADES HOWEVER SEQUOIA WILL ACCEPT TRADE INS OF LISST 100 AND LISST ST MODELS WHICH WILL BE Read more Support for LISST 100 and LISST ST to be discontinued 01 01 2011 May 25 2010 LISST 100 and LISST ST support to be discontinued from 1 1 2011 Sequoia May 25 2010 Sequoia stopped building the LISST 100 and the LISST ST in March 2004 more than 6 years ago Those models were replaced by the LISST 100X and Read more EPA requires the use of LISSTs when using oil dispersants in the Gulf of Mexico May 21 2010 EPA requires the use of LISSTs when oil dispersants are applied Sequoia May 21 2010 The Environmental Protection Agency EPA has directed the use of LISST s in connection with the use of oil dispersants in the Gulf of Read more Beta release of LISST SOP version 5 0 January 27 2009 Beta release of LISST SOP version 5 0 Sequoia January 27 2009 Sequoia is annoucing a beta release of the LISST SOP version 5 This is the software that is used for programming and analyzing LISST 100X and LISST 100 data Read more Next More in About About Suspended Sediment Concentration and Particle Sizing Methods Course Staff News PiE Conference 2014 PiE Conference 2014 Customer List Newsletter Contact International Distributors Categories General News Press Releases Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST ABS LISST Portable XR LISST Holo LISST Deep LISST StreamSide LISST STX LISST Hydro LISST Infinite LISST VSF LISST STOKES Optical VSF Sensors LISST SL LISST 25X FlowControl Instruments FlowControl Lab FlowControl Sub Radiative Transfer

    Original URL path: http://www.sequoiasci.com/about/news/page/6/ (2016-02-13)
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  • General News | Sequoia Scientific
    with the USGS Water Science Center in Wisconsin He is featured in an article in the June 2012 issue of Stormwater the journal for surface water quality professionals Read more Support for LISST 100 and LISST ST to be discontinued 01 01 2011 May 25 2010 LISST 100 and LISST ST support to be discontinued from 1 1 2011 Sequoia May 25 2010 Sequoia stopped building the LISST 100 and the LISST ST in March 2004 more than 6 years ago Those models were replaced by the LISST 100X and Read more EPA requires the use of LISSTs when using oil dispersants in the Gulf of Mexico May 21 2010 EPA requires the use of LISSTs when oil dispersants are applied Sequoia May 21 2010 The Environmental Protection Agency EPA has directed the use of LISST s in connection with the use of oil dispersants in the Gulf of Read more Beta release of LISST SOP version 5 0 January 27 2009 Beta release of LISST SOP version 5 0 Sequoia January 27 2009 Sequoia is annoucing a beta release of the LISST SOP version 5 This is the software that is used for programming and analyzing LISST 100X and LISST 100 data Read more Next More in About About Suspended Sediment Concentration and Particle Sizing Methods Course Staff News PiE Conference 2014 PiE Conference 2014 Customer List Newsletter Contact International Distributors Categories General News Press Releases Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST ABS LISST Portable XR LISST Holo LISST Deep LISST StreamSide LISST STX LISST Hydro LISST Infinite LISST VSF LISST STOKES Optical VSF Sensors LISST SL LISST 25X FlowControl Instruments FlowControl Lab FlowControl Sub Radiative Transfer Models EcoLight S HydroLight Accessories

    Original URL path: http://www.sequoiasci.com/about/news/category/general-news/page/5/ (2016-02-13)
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  • I’m not sure about the data quality of my LISST-100 or LISST-100X data – can you advise me? | Sequoia Scientific
    processing and would like you to have a look at them can you do that What data do I need to send to you A We ll be happy to look at your data and help you figure out what is going on that is a part of the support you get when you purchase a LISST instrument For LISST 100 or LISST 100X data we ALWAYS need the following from you The raw data the file s with either a DAT or a LOG extension PLEASE NOTE THE PSD FILES GENERATED BY THE LISST SOP ARE NOT RAWDATA FILES THEY ARE FULLY PROCESSED FILES DO NOT SEND US PSD FILES WE CANNOT USE THESE FOR ANY TROUBLESHOOTING WE CAN ONLY HELP YOU IF YOU SEND US DAT AND OR LOG FILES The zscat file you used for processing your data asc extension The serial number of the instrument you are using If you are returning data from more than one instrument please send them in separate emails with data from only one instrument in each email and the subject line clearly indicating instrument type and serial number Email the data to your local Sequoia distributor together with a detailed explanation of what you were doing and how the data were collected If you purchased the instrument directly from Sequoia email the data to info SequoiaSci com PLEASE NOTE WE CANNOT USE THE PSD or ASC DATA FILES PRODUCED BY THE LISST SOP FOR TROUBLESHOOTING DO NOT INCLUDE THESE IN YOUR EMAIL WE CAN ONLY HELP YOU IF YOU SUPPLY THE INFORMATION LISTED IN 1 3 ABOVE Updated 3 18 2011 Questions about this troubleshooting note Email us More in Library Library Articles Technical Papers Standards Our Newsletter Sign up to get the latest news on Sequoia and our products

    Original URL path: http://www.sequoiasci.com/article/im-not-sure-about-the-data-quality-of-my-lisst-100-or-lisst-100x-data-can-you-advise-me/ (2016-02-13)
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