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Sequoia LISST-SL Operating Manual

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LISST-SL
Operating Manual
LISST-SL Version 2.1

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  • Page 1 LISST-SL Operating Manual LISST-SL Version 2.1...
  • Page 2 (+1) 425-641-0944 ext. 107 Ole Mikkelsen ole.mikkelsen@SequoiaSci.com (+1) 425-641-0944 ext. 108 ©This document is copyrighted by SEQUOIA SCIENTIFIC, INC. It shall not be reproduced, disclosed, used in whole or part, for any purpose, without the specific written authorization of SEQUOIA SCIENTIFIC, INC.

  • Page 3: Table Of Contents

    Topside Control Box (TCB)............ 11 Battery Charging ..............17 Data Download from TCB ............17 Using the LISST-SL System in a Laboratory ....18 First Assembly and Test in Laboratory ........18 Background File acquisition ........... 19 Instrument health check............19 Collecting Test Data in a Lab ..........
  • Page 4 VII. Handling, Cleaning, Maintenance and Storage ....29 Handling ................. 29 Cleaning ................. 29 Storage .................. 30 FAQ’s ..................31 VIII. APPENDIX A: File names, File Formats, and Size Classes ... 33 APPENDIX B: Purging the Pitot System ..........37 APPENDIX C: Cleaning the Optics ............

  • Page 5: Introduction

    LISST-SL Sensor The main system is the streamlined submersible LISST-SL sensor. This is only a sensor; it needs power to operate, and it has no data storage capacity. So, it must be connected to the Topside Controller Box (See Section 1.3).

  • Page 6: The B-Reel

    The sensor is the entire streamlined instrument which enters the water. At the top of the LISST-SL sensor is the cable attachment point (1), which is hidden in a streamlined black ‘housing’ that looks like the sail of a submarine. Immediately behind is the underwater connector (2) to which the cable from the B-reel will be connected [see Appendix F for connector pin outs].

  • Page 7: The Topside Control Box (Tcb)

    It is connected to the –SL underwater electrical connector. If you ordered the B- reel from Sequoia, the termination is done by us. See Appendix F for connector type and wiring instructions. The other end of the cable is permanently attached to slip-rings. The slip-rings are permanently fastened to the rotating barrel of the B-reel.

  • Page 8: Terminology

    This is the attenuation suffered by the laser as well as by the scattered light as it passes through water. This measurement of attenuation is used to de-attenuate the measured scattered light on the ring detectors. The attenuation is not used to estimate sediment concentration. LISST-SL V2.1 User’s Guide...
  • Page 9 For example, for a single size particle measurement, we have seen an error of about 10% in concentration at a transmission reaching 10%. In other words, the data at LISST-SL V2.1 User’s Guide...
  • Page 10 (5) and the water exhaust port is marked as (6). The pitot tube is not shown. Sequoia Scientific, Inc. thanks you for choosing one of our products. We strive to make our instruments rugged, reliable, and simple to operate. If you should have any difficulties, questions, or suggestions, please feel free to contact us.

  • Page 11: Contents And Technical Specifications

    3-pin impulse plug (attached to TCB) Plastic Pitot Tube cover cups Tail screws Impulse sleeve (attached to –SL) Ship Disk for Instrument System Tube adapter clips (Red) Copy of Pack List Photographs of all items are included in Appendix E. LISST-SL V2.1 User’s Guide...

  • Page 12: Parameters Displayed On Tcb

    With tail and sail attached: 25.4 x 63.5 x 76.2 cm. [H x W x L] Weight (in air): 16 kg (35 lbs) Weight (in water): 7 kg (15 lbs). Topside Control Box 17.8 x 29.2 x 44.5 cm Weight: 9 Kg (19 lbs). LISST-SL V2.1 User’s Guide...

  • Page 13: Datafiles And Contents

    VIEW PSD FILE function on the PC software. R0641443.ASC This file is produced after processing the .dat file. It is an ASCII file containing size distribution and other variables. See Appendix A for order of variables. LISST-SL V2.1 User’s Guide...

  • Page 14: Size Ranges

    12.8 13.9 16.4 15.1 16.4 19.3 17.8 19.3 22.8 21.0 22.8 26.9 24.8 26.9 31.8 29.2 31.8 37.5 34.5 37.5 44.2 40.7 44.2 52.2 48.0 52.2 61.6 56.7 61.6 72.7 66.9 72.7 85.7 78.9 85.7 93.1 LISST-SL V2.1 User’s Guide...

  • Page 15: Learning The Lisst-Sl System

    Iso- kinetic means when water is taken into the LISST-SL at a velocity matching the river velocity. The power source is in the TCB, and data are managed by the (TCB) also, which has a touch-screen display.
  • Page 16 TCB, first a brief picture of the LISST-SL is flashed. After that, the main menu appears. The main menu is where you make the key selections: The SETUP button is for settings on the firmware of the TCB (e.g.
  • Page 17 Experiment. After each step is performed, press the check box. After checking all boxes, press View Rings button on bottom left. This button enables you to view the background in comparison to its ideal, factory value (red line). LISST-SL V2.1 User’s Guide...
  • Page 18 Did I get a good counts only), transmitted through water and through the Background? small hole at center of the ring detector. Lref is the laser emitted power. In clean water, the ratio Lp/Lref should be LISST-SL V2.1 User’s Guide...
  • Page 19 The depth indication is valuable. If you are in the field, the depth indication tells you exactly how deep the instrument is, regardless of the angle at which the cable hangs [in older USGS standard instruments, the wire LISST-SL V2.1 User’s Guide...
  • Page 20 If the background was acquired recently, the depth should show a small value (if the LISST-SL is in the lab, or held just below water surface in a river). The sediment concentration is displayed in units of mass per volume.

  • Page 21: Battery Charging

    That completes a description of the use of the TCB. Please charge the battery inside the TCB using ONLY 4. Battery the charger provided to you by Sequoia. Lithium battery Charging manufacturers do not recommend charging the batteries unattended for long periods of time. Limit charging to overnight or while attended.

  • Page 22: Using The Lisst-Sl System In A Laboratory

    Using the LISST-SL System in a Laboratory Now that you have become familiar with the subsystems, 1. First LISST-SL sensor, the B-reel, and the TCB, we describe a Assembly and test assembly in the laboratory and basic operations. Test in...

  • Page 23: Background File Acquisition

    Check if Pitot Tube is free of air: Air in the pitot system Pitot Tube clear? can cause faulty operation of the iso-kinetic pump controller. The simplest test is as follows. LISST-SL V2.1 User’s Guide...

  • Page 24: Collecting Test Data In A Lab

    Connect one water-filled flexible tube (1/4-inch ID, or 6 mm ID) with a pinch clamp to the intake of the LISST-SL. Connect a second tube to the exit of the SL (at top, behind the 6-pin connector). Send the free end of this tube to a drain.

  • Page 25: Temporary Storage

    You may add a little Draining Turbid Water bleach to prevent algae growth in the water passage and pump. To prevent air from entering the pitot tube, cover the pitot opening with a pinched tube. LISST-SL V2.1 User’s Guide...

  • Page 26: Field Deployment

    Cable to connect TCB to B-reel. Termination on the B-reel to connect to the – SL [ this is provided by Sequoia if you purchased the B-reel through us.] Carry the rest of the accessories supplied to you as these may come in handy as well.

  • Page 27: Collecting Data

    3. Collecting Data Follow the following steps: Make sure to turn off power at the TCB. Pull up the LISST-SL and remove the tubing and filter. Lower the instrument in the river. Turn on power on TCB, then press MEASURE.

  • Page 28: Shutting Down

    It is a good idea to wash the exterior of the instrument and remove sediment from the pressure ports and connector area. Attach a clean water tube to the intake of the LISST-SL and wash out the internal surfaces by passing a strong flow of water through.

  • Page 29: Software Installation And Viewing Data

    You will notice that so far, even including a field test, no PC use was required. The Windows Software provided by Sequoia is needed only to process the .dat binary data file. You will only process one file: the .dat file on your PC.

  • Page 30: Learning The Software

    PC, and turn on the TCB power. When you next launch the LISST-SL windows software, a window will open with a picture of the LISST-SL and a selection of just 3 buttons, OFFLOAD DATA, PROCESS RAW DATA, and VIEW PSD FILE. You will begin with choosing one of these 3 options.

  • Page 31: Processing Raw Data File

    If the LISST-SL software is already running, choose the Quick Launch button under the File menu option. Then select Offload Data button. This completes the download process. You may select another file to download the same way. You can also select a number of files at once to download by following procedures identical to the Microsoft File Manager.

  • Page 32: Formats Of Results File

    The formats of all files, (.txt, .csv, and .asc) are provided 7. Formats of in Appendix A. Results file Sequoia Scientific, Inc. does not provide software for 8. Presenting you to prepare your reports. You may load the .csv and/or Results .asc files into any plotting software for report preparation.

  • Page 33: Handling, Cleaning, Maintenance And Storage

    Avoid scratching the touch panel display. 2. Cleaning Clean the LISST-SL body with water each time after use, and before storage. It is a good idea to connect a hose to the intake and run tap water through the system.

  • Page 34: Storage

    A 5 pin Impulse plug and sleeve is provided to protect the connector on the LISST-SL when the sensor is not in use. The 3 pin Impulse plug should be put on the TCB...

  • Page 35: Faq's

    Background. If the displayed concentration is small (<5mg/l), you may use the instrument, knowing that that is the noise floor. Does the LISST-SL take Yes. This was published in a study by our scientists (see into account the irregular Agrawal YC,Whitmire A, Mikkelsen OA, Pottsmith HC shape of the natural (2008);...
  • Page 36 Can I overcharge the If you charge the battery with the power adaptor supplied rechargeable battery inside by Sequoia as part of the instrument you cannot the instrument? overcharge the battery. Do you have an FAQ not answered here? Try the FAQ webpage on our website (http://www.SequoiaSci.com/faq/?SectionName=faq)! Otherwise contact us;...

  • Page 37: Appendix A: File Names, File Formats, And Size Classes

    Text File created with data. For easy reading. Contains information about the other files. Here is an example of one such file: LISST-SL Data File Created on: Thursday, March 04, 2010 12:31:36 Day: LISST-SL Serial number = 2005 Firmware Version 2.200 Mar 1 2010 16:45:31 Concentration Mean Size...
  • Page 38 VIEW PSD FILE function on the PC software. Rxxxxxxx.ASC Particle Size Distribution, from post-processing .dat file. This is an ASCII file, for use with user’s plotting software or report preparation. LISST-SL V2.1 User’s Guide...
  • Page 39 LISST-SL V2.1 User’s Guide...
  • Page 40 12.8 13.9 16.4 15.1 16.4 19.3 17.8 19.3 22.8 21.0 22.8 26.9 24.8 26.9 31.8 29.2 31.8 37.5 34.5 37.5 44.2 40.7 44.2 52.2 48.0 52.2 61.6 56.7 61.6 72.7 66.9 72.7 85.7 78.9 85.7 93.1 LISST-SL V2.1 User’s Guide...

  • Page 41: Appendix B: Purging The Pitot System

    There are three o-rings inside the nose that need to be properly seated when O-ring Placement the nose is screwed back on. One large o-ring (2-156) is a face seal outside the thread diameter. Two other o-rings are LISST-SL V2.1 User’s Guide...
  • Page 42 5 psi. Screw the nose onto the LISST-SL while it is still under water. Align the three white marks on the side. Screw on the pitot cap. At this point all...
  • Page 43 15 minutes at the deployment site. LISST-SL V2.1 User’s Guide...

  • Page 44: Appendix C: Cleaning The Optics

    Refer to Appendix D for a discussion on the acceptable quality of clean optics. Set the LISST-SL on the instrument stands. Angle the SL so the nose is higher than the nose (to prevent contamination from the pump cavity from flowing back onto the windows).
  • Page 45 LISST-SL V2.1 User’s Guide...

  • Page 46: Appendix D: Background Files

    In our experience, this number is often less than 1 mg/l. This noise is the most vital criterion for accepting a background measurement. In the end, it is noise on your measurement that determines your confidence in the data. LISST-SL V2.1 User’s Guide...

  • Page 47: Appendix E: Detailed Accessories List

    0.2 m Filter Assembly (Used Foam Instrument Removing/Installing Tail Fin, to Get Background) etc.) Stands Cleaning Rod to clean glass Cleaning Patches (Insert at Windows Without Removing Cleaning End of Cleaning Cleaning Solution Nose Cone. Rod) LISST-SL V2.1 User’s Guide...
  • Page 48 Plastic Intake Tube Caps Syringes Adapter ½” x 3//8” Tube Adapter ¼” ID Tygon Tubing Tube Adapter Clips Hose Pinch Clamps Wing Nuts to Hold Filter to ISO Coarse Sediment Tail LISST-SL Tail Fin Tail fin Screws LISST-SL V2.1 User’s Guide...

  • Page 49: Appendix F: B-Reel Cable Termination

    The LISST-SL has a 5-pin underwater connector on the sensor. The inner wire on the B-Reel steel cable is the Power In for the LISST-SL. The Signal Ground is the outer jacket of the steel cable. Appropriate sealing and potting compounds should be used to maintain a waterproof isolated connection to the Power In.

  • Page 50: Appendix G: List Of Videos

    Connecting the filter outlet to the copper tube (on the correct side). Connecting the SL to TCB cable. Operating the TCB to purge the 0.2um filter. Using the View Rings feature on the TCB. An example of View Rings Before Cleaning the optics. LISST-SL V2.1 User’s Guide...
  • Page 51 An example of View Rings After Cleaning the optics. Switching from View Rings to Background Collection. Connecting the B-Reel cable to the SL. Connecting the TCB to B-Reel cable. LISST-SL V2.1 User’s Guide...

  • Page 52: Warranty

    Customer's premises. As to any Product repaired or replaced by SEQUOIA, the Warranty Period will end upon the later of one (1) year after SEQUOIA's delivery of the original Product or 90 days after SEQUOIA's delivery of the repaired or replacement Product.
  • Page 53 Product (including, but not limited to, any breach of or default under the Order by SEQUOIA) will in no event exceed the purchase price paid by Customer to SEQUOIA for such Product. Further, SEQUOIA...
  • Page 54 The Products may include or be delivered with certain computer programs, databases or other software that is proprietary to SEQUOIA. SEQUOIA hereby grants Customer a nonexclusive license to use such software solely for the purpose of operating Products. Customer will not: use any such software for any other purpose; modify, adapt, translate, or create derivative works based on any such software;...
  • Page 55 NOTES LISST-SL V2.1 User’s Guide...
  • Page 56 Copyright Sequoia Scientific, Inc. 2700 Richards Rd., Suite 107 Bellevue, WA 98005 http://www.SequoiaSci.com LISST-SL V2.1 User’s Guide...

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