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Engine Exhaust Particle Sizer Spectrometer 3090

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Product Details

The Engine Exhaust Particle Sizer 3090 (EEPS™) spectrometer measures the size distribution of engine exhaust particle emissions from 5.6 to 560 nm with the fastest time resolution available. Users can visualize and study the dynamic behavior of particle emissions that occur during transient test cycles, during the first few seconds of a cold start, or during regeneration of a particle trap or diesel particulate filter (DPF).

The EEPS spectrometer displays measurements in 32 channels total (16 channels per decade). It operates over a wide particle concentration range, including down to 200 particles/cm³. It operates at ambient pressure to prevent evaporation of volatile and semivolatile particles, and it requires no consumables.

Developed under license from Airel, Ltd.

    Applications

    • Engine exhaust and aftertreatment characterization
    • Brake dust and tire wear

    Features and Benefits

     

    Wide Size Range and Wide Dynamic Concentration Range

    The EEPS spectrometer measures particle emissions from 5.6 to 560 nm, reporting a total of 32 channels (16 channels per decade). Very sensitive electrometers provide the ability to measure particle concentrations greater than four orders of magnitude. This instrument is sensitive enough to measure concentration as low as 200 particles/cm³, making it well-suited for characterizing exhaust after-treatment devices like particle traps and DPFs.  

     

    The EEPS spectrometer measures particle emissions from 5.6 to 560 nm, reporting a total of 32 channels (16 channels per decade). Very sensitive electrometers provide the ability to measure particle concentrations greater than four orders of magnitude. This instrument is sensitive enough to measure concentration as low as 200 particles/cm³, making it well-suited for characterizing exhaust after-treatment devices like particle traps and DPFs.  

     

    Real-Time Measurements

    A data rate of 10 Hz enables users to identify and correlate fast changing particle emissions with specific engine events during the test cycle.

     

    A data rate of 10 Hz enables users to identify and correlate fast changing particle emissions with specific engine events during the test cycle.

     

    Selectable Matrices

    Selectable matrices tailored to application for more accurate measurement. (See Application Note EEPS-005 for more information)

     

    Selectable matrices tailored to application for more accurate measurement. (See Application Note EEPS-005 for more information)

     

    Robust Design and Operation

    All EEPS components are housed in a single cabinet that weighs just 32 kg, including the sample pump, making it easy to move the instrument between test rigs and take up less space in the test cell.

    Operation of the EEPS does not require a specialist to use it properly. After the instrument warms up for about 10 minutes, a microprocessor measures temperature and barometric pressure automatically and converts those values to volumetric flow. This maintains calibration and provides accurate and reproducible measurements.

     

    All EEPS components are housed in a single cabinet that weighs just 32 kg, including the sample pump, making it easy to move the instrument between test rigs and take up less space in the test cell.

    Operation of the EEPS does not require a specialist to use it properly. After the instrument warms up for about 10 minutes, a microprocessor measures temperature and barometric pressure automatically and converts those values to volumetric flow. This maintains calibration and provides accurate and reproducible measurements.

     

    Service Made Simple

    When it's time to clean the instrument, a cleaning tool (supplied) allows users to quickly wipe away soot or other particles that may have built up on the electrometers. The process takes less than 15 minutes - saving users time and money. 

     

    When it's time to clean the instrument, a cleaning tool (supplied) allows users to quickly wipe away soot or other particles that may have built up on the electrometers. The process takes less than 15 minutes - saving users time and money. 

     

    Front Panel Display

    Using the display and built-in control knob, users can view measurements in real-time and quickly check operating parameter settings and status. Data can be viewed in a variety of ranges and formats, including auto-range and linear or log scale.

     

    Using the display and built-in control knob, users can view measurements in real-time and quickly check operating parameter settings and status. Data can be viewed in a variety of ranges and formats, including auto-range and linear or log scale.

     

    Flexible Data Management

    EEPS software combines data collection and analysis for convenience. It offers many advanced features including:

    • Views of the entire test cycle with the ability to zoom in on specific events
    • 3D movie view of size distribution and particle concentration versus time
    • Handling of effective densities to calculate and output PM
    • Selectable matrices tailored to application for more accurate measurement

     

    EEPS software combines data collection and analysis for convenience. It offers many advanced features including:

    • Views of the entire test cycle with the ability to zoom in on specific events
    • 3D movie view of size distribution and particle concentration versus time
    • Handling of effective densities to calculate and output PM
    • Selectable matrices tailored to application for more accurate measurement

     


    Resource Center


    FAQs
    • Can the Model 3090 measure exhaust directly from the tailpipe?
      No. Like most other instruments, the EEPS™ spectrometer requires dilution before the hot engine exhaust particles are sampled. Many of the size distribution characteristics are determined by how the conditioning and sampling are done.
    • Do I need to send the Model 3090 to TSI for recalibration?
      The EEPS™ spectrometer can be cleaned and serviced in the field. Periodic service and calibration at a TSI facility is recommended to ensure accurate sizing.
    • Do I need to upgrade the firmware to use this new version of the software?
      If you have version 3.12 of firmware or older, you should update the firmware along with the software. This can be done using a simple-to-use PC utility available from the TSI ftp site. If your firmware version is older than 3.0, the firmware cannot be upgraded this way and requires a hardware change as well. The firmware version is shown on the instrument screen on power up. 
    • Does the Software and Firmware Include a New Matrix?
      Yes. The default matrix is the same but there are now two new matrices. The new matrices are a soot matrix and a compact matrix. In addition to taking data with these new matrices, you can also post-process data with a different matrix since the raw data is always maintained.
    • How do I know that particle size information is correct?
      TSI's years of experience with the earlier electrical mobility systems have resulted in this new instrument for measuring particle sizes. Comparing the results of a stable aerosol size between a Scanning Mobility Particle Sizer™ (SMPS) and the EEPS™ spectrometer will assure that the particle sizing is correct. If there is a significant difference, see the troubleshooting section in the EEPS manual to identify likely sources of the problem.
    • How do I know that the Model 3090 is working properly?
      Built-in diagnostics indicate when air flows and charger or column voltages are out of specification and prevent operation if the conditions are not correct. Periodically running particle size standards will also ensure the system is sizing particles properly. Refer to the appropriate sections of the Model 3090 EEPS™ spectrometer manual.
    • How do the Model 3090 results compare with other instruments that use different technology?
      The standard for sizing engine exhaust particles is the TSI SMPS™ systems. The Model 3090 EEPS™ spectrometer uses a similar electrical mobility technique but with multiple sensors to get a much faster size distribution.
    • How does the temperature and humidity affect the EEPS™ spectrometer measurement?
      Temperature and relative humidity affects the formation of nucleation mode particles. If the temperature is too high, the electrometer response can be affected. Dilution and control of the sample temperature is necessary for consistent results.
    • How Much Bigger Will the Data Files Be With The Added Raw Data?
      The files will be roughly twice the size of files stored using the previous version of software. You should not have to upgrade your computer to handle the additional data load.  
    • Should I Upgrade My Software If It's Working Fine Now?
      Yes. Choosing the correct matrix for your application will improve the sizing accuracy and result in better mass estimates.
    • What Advantage Does Saving Raw Data Have for the Customer?
      In the short-term, if there is a problem with the instrument, having the raw data and corresponding inverted data will make it easier to troubleshoot possible problems with the instrument hardware or inversion. In the long-term, it will help us to improve the inversion algorithm for a variety of applications (such as improving the inversion of engine data vs. outdoor air). 
    • What Has Been Changed In The New Version of the EEPS Software and Firmware?
      TSI has released MCU firmware version 3.13 and software version 3.2.5. Firmware version 3.13 allows an inversion matrix other than the default to be uploaded onto the EEPS instruments itself, displaying data on the front panel processed with the uploaded matrix. With EEPS spectrometer software version 3.2.5, data can be collected using IM-default, IM-compact, IM-soot, or any custom matrix. Additionally, software version 3.2.5 can be used to post-process previously recorded EEPS spectrometer data files provided that the files contain the raw instrument record. The raw instrument record is saved in any EEPS spectrometer data file recorded with software version 3.1.0 or later and MCU firmware version 3.05 or later. Data files collected on instruments with an MCU firmware version older than 3.05 and or software version older than 3.1.0 do not contain the raw instrument record and thus cannot be post processed using the EEPS spectrometer software.
    • What if the density is unknown?
      As long as you are simply comparing results for consistency, a density value can be assumed. A constant density for all particle sizes can be easily entered into software. If the true density is determined later, or the assumption needs to be changed, the user can edit the density value at any time.
    • What if the density setting is incorrect?
      The density setting for each particle size can be set either before or after taking data. Tables of density settings (for different sizes) can be saved and loaded to quickly change density to that which controls the mass results.
    • What test protocols can be performed with the Model 3090?
      The instrument can do tests up to 90 minutes in length. If a test needs to be stopped early, a single mouse-click (or several key strokes) will stop data collection.
    • Which Inversion Matrix Should I Use?
      EEPS spectrometer Software version 3.2.5 allows the user to collect and process data using any of the three included matrices (default, compact, soot), in addition to any custom matrices that may be created. In general, the soot matrix should be used for engine exhaust and the compact matrix should be reserved for studies in which it is known that the aerosol being sampled is near-spherical in nature.

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