YSI 85 Operation Manual
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YSI 85 Operation Manual

Handheld oxygen, conductivity, salinity, and temperature system
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Operations Manual for YSI 85
Appendix D
Pontchartrain Conservancy
Standard Operating Procedures
Metairie, Louisiana
Pontchartrain Conservancy
3501 N. Causeway Blvd, Suite 220
Metairie, Louisiana 70002
(504) 836-2235

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  • Page 1 Operations Manual for YSI 85 Appendix D Pontchartrain Conservancy Standard Operating Procedures Metairie, Louisiana Pontchartrain Conservancy 3501 N. Causeway Blvd, Suite 220 Metairie, Louisiana 70002 (504) 836-2235...
  • Page 2 YSI Model 85 Handheld Oxygen, Conductivity, Salinity, and Temperature System Operations Manual...

  • Page 3: Table Of Contents

    6.2 Changing the Reference Temperature ................16 6.3 Changing from Autoranging to Manual Ranging .............16 SECTION 7 Making Measurements ....................17 7.1 Turning the Instrument On....................17 7.2 The Measurement Modes of the Model 85................17 7.3 Autoranging and Range Searching ..................18 7.4 The Backlight........................18 SECTION 8 Saving Data........................21 8.1 Saving Data to Memory .....................21...
  • Page 4 SECTION 11 Discussion Of Measurement Errors................27 11.1 Dissolved Oxygen Measurement Errors................27 11.2 Conductivity Measurement Errors...................29 11.3 Dissolved Oxygen Probe Precautions................31 SECTION 12 Troubleshooting ......................33 SECTION 13 Warranty And Repair....................35 SECTION 14 Accessories And Replacement Parts ...............40 APPENDIX A Specifications ......................45 APPENDIX B Required Notice ......................47 APPENDIX C Temperature Correction Data ................51 APPENDIX D Conversion Chart.....................53...

  • Page 5: Section 1 Introduction

    YSI combination conductivity and dissolved oxygen probe. The YSI Model 85 is designed for use in field, lab, and process control applications as well as for environmental, aquaculture, and industrial uses. The Model 85 is available with cable lengths of either 10, 25, 50 or 100 feet.
  • Page 6 Introduction Section 1 YSI, Incorporated Model 85...

  • Page 7: Section 2 Preparing The Meter

    BATTERIES There are a few things you must do to prepare your YSI Model 85 for use. First, locate the six AA- size alkaline batteries that were included in your purchase. Use a screwdriver or a small coin to remove the thumbscrew on the bottom of the instrument.
  • Page 8 NOTE: It is very important that the batteries be installed ONLY as illustrated. The instrument will not function and may be damaged if the batteries are installed incorrectly. YSI, Incorporated Model 85...

  • Page 9: Calibration/Storage Chamber

    HAND STRAP The hand strap is designed to allow comfortable operation of the Model 85 with minimum effort. If the hand strap is adjusted correctly, it is unlikely that the instrument will be easily dropped or bumped from your hand. See figure on previous page.
  • Page 10 Preparing the Meter Section 2 YSI, Incorporated Model 85...

  • Page 11: Section 3 Preparing The Probe

    SECTION 3 PREPARING THE PROBE The YSI Model 85 dissolved oxygen probe is shipped dry. The protective membrane cap on the probe tip must be removed and replaced with KCl solution and a new membrane cap before using the probe. Follow the instructions below to install KCl solution and the new membrane cap.
  • Page 12 Preparing the Probe Section 3 YSI, Incorporated Model 85...

  • Page 13: Section 4 Overview Of Operation

    SECTION 4 OVERVIEW OF OPERATION The following diagram is an overview of the operation of the Model 85. See the following sections for details of operation. YSI, Incorporated Model 85...
  • Page 14 Overview of Operation Section 4 YSI, Incorporated Model 85...

  • Page 15: Section 5 Calibration

    EXAMPLE: Entering the number 12 here indicates 1200 feet. 5. The Model 85 should now display CAL in the lower left of the display, the calibration value should be displayed in the lower right of the display and the current % reading (before calibration) should be on the main display.

  • Page 16: Calibration Of Conductivity

    CALIBRATION OF CONDUCTIVITY IMPORTANT: System calibration is rarely required because of the factory calibration of the YSI Model 85. However, from time to time it is wise to check the system calibration and make adjustments when necessary. Prior to calibration of the YSI Model 85, it is important to remember the following: 1.
  • Page 17 The word “SAVE” will flash across the display for a second indicating that the calibration has been accepted. The YSI Model 85 is designed to retain its last conductivity calibration permanently. Therefore, there is no need to calibrate the instrument after battery changes or power down.
  • Page 18 Calibration Section 5 YSI, Incorporated Model 85...

  • Page 19: Section 6 Advanced Conductivity Setup

    For that reason, we have made the YSI Model 85 flexible to accommodate these “advanced users.” If, for example, you are using the YSI Model 85 for a process control application that requires that the conductivity readings be compensated to 20 C instead of 25 C -- this is the section to read.

  • Page 20: Changing The Reference Temperature

    7. The instrument will automatically return to normal operation mode. CHANGING FROM AUTORANGING TO MANUAL RANGING If your application is easier to perform using a manual range that you select, the YSI Model 85 allows you to turn off the default autoranging feature. While you are making conductivity or temperature compensated conductivity measurements, simply press and release the UP ARROW button.

  • Page 21: Section 7 Making Measurements

    Salinity -- A calculation done by the instrument electronics, based upon the conductivity and temperature readings. NOTE: When you turn the Model 85 off, it will “remember” which mode you used last and will return to that mode the next time the instrument is turned on.

  • Page 22: Autoranging And Range Searching

    THE BACKLIGHT At times it may be necessary to take measurements with the Model 85 in dark or poorly lit areas. To help in this situation, the Model 85 comes equipped with a backlight that will illuminate the display so that it can be easily read.
  • Page 23 Making Measurements Section 7 YSI, Incorporated Model 85...
  • Page 24 Making Measurements Section 7 YSI, Incorporated Model 85...

  • Page 25: Section 8 Saving Data

    Non-volatile means that you do not need to worry that your data will be lost due to a power failure or power interrupt. The Model 85 will also assign a site identity number to each set of readings to allow easy review of the data. This feature is useful in situations where transcribing data is difficult or not available.

  • Page 26: Erasing Stored Data

    Site ID# for the previously recorded date. For example: If you are reviewing Site ID# 5 and the UP ARROW is depressed the Model 85 will display Site ID# 4. If you are reviewing Site ID# 5 and Site ID# 5 was the last set of data stored the DOWN ARROW button will display Site ID# 1.

  • Page 27: Section 9 Maintenance

    3. Repeat steps one and two until the cell is completely clean. Rinse the cell thoroughly in deionized, or clean tap water. 4. Store the conductivity cell in the meter storage chamber. NOTE: See Section 11, Dissolved Oxygen Probe Precautions for instructions on cleaning the dissolved oxygen electrodes. YSI, Incorporated Model 85...
  • Page 28 Maintenance Section 9 YSI, Incorporated Model 85...

  • Page 29: Section 10 Principles Of Operation

    (mS/cm), the conductance is multiplied by the cell constant that has units of reciprocal cm (cm -1 ). The cell constant for the Model 85 conductivity cell is 5.0/cm + 4%. For most applications, the cell constant is automatically determined (or confirmed) with each deployment of the system when the calibration procedure is followed.
  • Page 30 Cl and for seawater. Salinity is determined automatically from the Model 85 conductivity readings according to algorithms found in Standard Methods for the Examination of Water and Wastewater (ed. 1989). The use of the Practical Salinity Scale 1978 results in values which are unitless, since the measurements are carried out in reference to the conductivity of standard seawater at 15 C.

  • Page 31: Section 11 Discussion Of Measurement Errors

    A. Meter linearity error: ±1% of full scale reading, or ±0.15 mg/l B. Component and circuitry error: ±0.05 mg/l TYPE 2 ERRORS A. Temperature compensation for membrane temperature coefficient: ±0.03 mg/l B. Temperature measurement errors: A maximum ±0.2 C probe error is equal to ±0.14 mg/l YSI, Incorporated Model 85...
  • Page 32 It is unlikely that the actual error in any measurement will be the maximum possible error. A better error approximation is obtained using a root mean squared (r.m.s.) calculation: ½ r.m.s. error = ±[1a + 1b + 2a + 2b + 3a + 3b mg/l YSI, Incorporated Model 85...

  • Page 33: 11.2 Conductivity Measurement Errors

    Performing a calibration will eliminate any error that might arise because of cell constant change. YSI cells are calibrated to within one percent of the stated cell constant at a single point. We consider these products to be usefully linear over most instrument ranges. The cell constant can be calibrated to ±0.35% accuracy with YSI conductivity calibrator solutions.
  • Page 34 Only trial and error in the actual measurement environment can be suggested as an approach to reduce such errors. If the reading does not change as the setup is adjusted, errors due to such factors can be considered too small to see. YSI, Incorporated Model 85...

  • Page 35: 11.3 Dissolved Oxygen Probe Precautions

    To restore the cathode, you may either return the instrument to the factory or clean it using the YSI 5238 probe reconditioning kit. Never use chemicals or abrasives not supplied with this kit.
  • Page 36 Discussion of Measurement Errors Section 11 YSI, Incorporated Model 85...

  • Page 37: Section 12 Troubleshooting

    11. Main display reads “PErr” A. User cell constant cal K is 0.0 A. See “Advanced Setup” section. B. Refer to manual section for step by step B. Incorrect sequence of keystrokes. instruction for the function you are attempting. YSI, Incorporated Model 85...
  • Page 38 A. Return the system for service. (pg. 26) (Secondary display reads “eep”) time. 17. Readings on main display don’t A. Meter is in recall mode. A. Press MODE button to return to Normal change Operation (pg. 12) YSI, Incorporated Model 85...

  • Page 39: Section 13 Warranty And Repair

    SECTION 13 WARRANTY AND REPAIR YSI Model 85 Handheld Meters are warranted for two years from date of purchase by the end user against defects in materials and workmanship. YSI Model 85 probes and cables are warranted for one year from date of purchase by the end user against defects in material and workmanship.
  • Page 40 AUTHORIZED U.S. SERVICE CENTERS Please visit www.ysi.com or contact YSI Technical Support for the nearest authorized service center. YSI Incorporated • Technical Support • Phone: +1 937 767-7241 • 800 897-4151 • Fax: 937 767-1058 • Email: environmental@ysi.com YSI, Incorporated...
  • Page 41 Disposition costs will be the responsibility of the sender. When service is required, either at the user's facility or at YSI, the following steps must be taken to insure the safety of our service personnel.
  • Page 42 Cleaning Certificate Organization Department Address City State Country Phone Model No. of Device Lot Number Contaminant (if known) Cleaning Agent(s) used Radioactive Decontamination Certified? (Answer only if there has been radioactive exposure) Cleaning Certified By Name Date YSI, Incorporated Model 85...
  • Page 43 Warranty and Repair Section 13 YSI, Incorporated Model 85...

  • Page 44: Section 14 Accessories And Replacement Parts

    SECTION 14 ACCESSORIES AND REPLACEMENT PARTS The following parts and accessories are available from YSI or any Franchise Dealer authorized by YSI. YSI ORDER NUMBER DESCRIPTION YSI 5906 Replacement Membrane Cap Kit ( 6 each ) YSI 5238 Probe Reconditioning Kit Conductivity Calibration Solution 1,000 µ/cm (1 Quart)
  • Page 45 Accessories and Replacements Section 14 YSI, Incorporated Model 85...

  • Page 46: Appendix A Specifications

    Power: 9 VDC -6 AA-size Alkaline Batteries (included) Approximately 100 hours operation from each new set of batteries Water Tightness: Meets or exceeds IP65 standards Extensive testing of the YSI Model 85 indicates the following typical performance: Measurement Range Resolution Accuracy 0 to 499.9 µS/cm...
  • Page 47 Specifications Appendix A YSI, Incorporated Model 85...
  • Page 48 37.5 1.771 2.03 37.5 0.186 2.08 1.845 2.05 0.194 2.09 1.997 2.07 0.210 2.11 2.151 2.09 0.226 2.13 ** Charts developed by interpolating data from International Critical Tables, Vol. 6, pp. 229-253, McGraw-Hill Book Co., NY. YSI, Incorporated Model 85...
  • Page 49 0.137 2.15 0.151 2.19 37.5 0.158 2.20 0.165 2.22 0.180 2.25 0.195 2.29 * Charts developed by interpolating data from the CRC Handbook of Chemistry and Physics, 42nd ed., p. 2606, The Chemical Rubber Company, Cleveland. YSI, Incorporated Model 85...
  • Page 50 * Charts developed by interpolating data from the CRC Handbook of Chemistry and Physics, 42nd ed., p. 2606, The Chemical Rubber Company, Cleveland. ** Charts developed by interpolating data from International Critical Tables, Vol. 6, pp. 229-253, McGraw-Hill Book Co., NY. YSI, Incorporated Model 85...
  • Page 51 2.06 1.860 2.10 0.194 2.07 2.020 2.14 0.210 2.11 2.186 2.18 0.227 2.15 * Charts developed by interpolating data from the CRC Handbook of Chemistry and Physics, 42nd ed., p. 2606, The Chemical Rubber Company, Cleveland. YSI, Incorporated Model 85...

  • Page 52: Appendix B Required Notice

    The user may find the following booklet, prepared by the Federal Communications Commission, helpful: "How to Identify and Resolve Radio-TV Interference Problems." This booklet is available from the U.S. Government Printing Office, Washington, D.C. 20402, Stock No. 0004-000-00345-4. YSI, Incorporated Model 85...
  • Page 53 Required Notice Appendix C YSI, Incorporated Model 85...

  • Page 54: Appendix D Conversion Chart

    TO CONVERT FROM EQUATION Feet Meters Multiply by 0.3048 Meters Feet Multiply by 3.2808399 Degrees Celsius Degrees Fahrenheit (9/5 C)+32 Degrees Fahrenheit Degrees Celsius 5/9 ( F-32) Milligrams per liter (mg/l) Parts per million (ppm) Multiply by 1 YSI, Incorporated Model 85...

  • Page 55: Appendix C Temperature Correction Data

    Conversion Chart Appendix D YSI, Incorporated Model 85...

  • Page 56: Appendix E Oxygen Solubility Table

    7.22 19.0 9.28 8.79 8.33 7.90 7.48 7.09 20.0 9.09 8.62 8.17 7.75 7.35 6.96 21.0 8.92 8.46 8.02 7.61 7.21 6.84 22.0 8.74 8.30 7.87 7.47 7.09 6.72 23.0 8.58 8.14 7.73 7.34 6.96 6.61 YSI, Incorporated Model 85...
  • Page 57 45.0 5.93 5.67 5.41 5.17 4.94 4.72 * This table is provided for your information only. It is NOT required when calibrating the Model 85 in accordance with the instructions outlined in the section entitled Calibration. YSI, Incorporated Model 85...

  • Page 58: Appendix F Calibration Values Table

    22.76 77.0 7401 2256 22.44 76.0 7749 2362 22.13 75.0 8100 2469 21.85 74.0 8455 2577 21.54 73.0 8815 2687 21.26 71.9 9178 2797 20.94 70.9 9545 2909 20.63 69.9 9917 3023 20.35 68.9 10293 3137 YSI, Incorporated Model 85...
  • Page 59 Calibration Values Table Appendix F YSI, Incorporated Model 85...
  • Page 60 1700/1725 Brannum Lane Yellow Springs, Ohio 45387 +1 937 767-7241 800 765-4974 (US) FAX (937) 767-9353 E-mail: environmental@YSI.com Website: www.YSI.com ITEM # 038503 DRW # A38503 - Web Revision E - Web November 1998...

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