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YSI 95 Operation Manual

Handheld dissolved oxygen and temperature system
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YSI MODEL 95
YSI MODEL 95
YSI MODEL 95
YSI MODEL 95
Handheld
Handheld
Handheld
Handheld
Dissolved Oxygen
Dissolved Oxygen
Dissolved Oxygen
Dissolved Oxygen
And
And
And
And
Temperature System
Temperature System
Temperature System
Temperature System
Operations
Manual

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  • Page 1 YSI MODEL 95 YSI MODEL 95 YSI MODEL 95 YSI MODEL 95 Handheld Handheld Handheld Handheld Dissolved Oxygen Dissolved Oxygen Dissolved Oxygen Dissolved Oxygen Temperature System Temperature System Temperature System Temperature System Operations Manual...

  • Page 3: Table Of Contents

    CONTENTS CONTENTS CONTENTS CONTENTS SECTION 1 INTRODUCTION ............................1 SECTION 2 PREPARING THE METER ........................2 2.1 U .................................2 NPACKING 2.2 W ..............................2 ARRANTY 2.3 B ..................................2 ATTERIES 2.4 C ..........................3 ALIBRATION TORAGE HAMBER 2.5 H ................................3 TRAP 2.6 T ...............................3 ETER SECTION 3 PREPARING THE PROBE .........................4 3.1 C ........................4...

  • Page 5: Section 1 Introduction

    This chamber also provides a convenient place to store the probe when the system is not in use. The Model 95 case is waterproof (rated to IP65) allowing operation in the rain without damage to the instrument.

  • Page 6: Section 2 Preparing The Meter

    BATTERIES BATTERIES There are a few things you must do to prepare your YSI Model 95 for use. First, locate the six AA- sized alkaline batteries that were included. Use a screwdriver or a small coin to remove the thumbscrew on the bottom of the instrument (see figure below). This thumbscrew holds the battery- chamber cover in place.

  • Page 7: Calibration/Storage Chamber

    The hand strap (see figure on previous page) is designed to allow comfortable operation of the Model 95 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.

  • Page 8: Section 3 Preparing The Probe

    Two different membrane caps are available for the Model 95. The YSI Model 9501 Membrane Cap Kit is supplied with the Model 95. This kit contains six 0.5 mil (.0005") membrane caps and a bottle of MEA probe solution (KCl).
  • Page 9 Screw cap on Screw guard on tightly by hand tightly by hand Figure 2 WARNING: Use only YSI MEA probe solution in the membrane cap. Any other solution will damage the MEA sensor. YSI Incorporated Model 95...

  • Page 10: Section 4 Operation

    SECTION 4 SECTION 4 SECTION 4 SECTION 4 OPERATION OPERATION OPERATION OPERATION The following diagram is an overview of the operation of the Model 95. See the following sections for details of operation. Figure 3 YSI Incorporated Model 95...

  • Page 11: Turning The Instrument On

    The approximate salinity of the samples that you will be measuring. Fresh water has a salinity of approximately zero. Sea water has a salinity of approximately 35 (parts per thousand, ppt). If you are not certain what the salinity of the sample water is, use a YSI Model 30 Salinity- Conductivity-Temperature system to determine it.

  • Page 12: Making Measurements

    When the proper salinity appears on the LCD (zero for fresh water), press the ENTER button. 5. The Model 95 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 DO reading (before calibration) should be on the main display.

  • Page 13: Stirring

    AVING DATA The Model 95 is equipped with a non-volatile memory that is capable of storing up to 50 different sets of readings. Non-volatile means that you do not need to worry that your data will be lost due to a power failure or interruption, such as when the batteries are removed.

  • Page 14: Erasing Stored Data

    5. When you have finished recalling data, press MODE two times to return to normal operation. NOTE: The Model 95 will recall data as a list. When the UP ARROW is depressed the Model 95 will display the Site ID# for the previously recorded date. For example: If you are reviewing Site ID# 5 and the UP ARROW is depressed the Model 95 will display Site ID#4.

  • Page 15: Toggling Between %-Air Saturation And Mg/L

    DISPLAY BACKLIGHT DISPLAY BACKLIGHT At times it may be necessary to take measurements with the Model 95 in dark or poorly lit areas. To help in this situation, the Model 95 comes equipped with a backlight that will illuminate the display so that it can be easily read.

  • Page 16: Section 5 Principles Of Operation

    (KCl electrolyte) behind the membrane. These reactions, at the cathode and the anode, are as follows: Cathode reaction: + 2H O + 4e ==> 4OH Anode reaction: Ag + Cl ==> AgCl + e YSI Incorporated Model 95...

  • Page 17: Do Readings From The Cathode Reduction

    25°C, the electrolyte should last up to 500 hours. This translates into about 62.5 working days at 8 hours per day operation. The actual electrolyte life, however, may be shorter since, in most environmental applications, membrane fouling determines life electrolyte/membrane. YSI Incorporated Model 95...

  • Page 18: Section 6 Maintenance Of The Mea Sensor

    Since the current of the MEA oxygen sensor is so much smaller (on average 100 times smaller) than the current of YSI conventional oxygen sensors, consumption of the silver anode, due to the formation of AgCl, is minimal during the lifetime of the probe. There should not be any significant build-up of silver chloride at the surface of the anode for 3 to 4 years, therefore, the anode should not require chemical cleaning.

  • Page 19: Dissolved Oxygen Probe Precautions

    MEA probe solution. Store the sensor in a humid environment such as the calibration chamber with the wet sponge inside. Do NOT store the probe dry. YSI Incorporated Model 95...

  • Page 20: Section 7 Discussion Of Measurement Errors

    If the probe is calibrated in water-saturated air, then type 3B errors (humidity), the largest error of all types, is virtually eliminated and the maximum possible error is in the order of 0.1 mg/L for the case of calibrating around 25°C. YSI Incorporated Model 95...

  • Page 21: Section 8 Troubleshooting

    B. Return the system for service (Section 9) 9. Main display reads “Err” A. System has failed its ROM test check A.Turn instrument OFF and back ON procedure. again. (Secondary display reads “ro”) B. Return the system for service (Section 9) YSI Incorporated Model 95...
  • Page 22 A. Return the system for service (Section 9) time. (Secondary display reads “eep”) 11. Readings on main display don’t A. Meter is in recall mode. Press MODE button to return to change Normal Operation (Section 4) YSI Incorporated Model 95...

  • Page 23: Section 9 Warranty And Repair

    WARRANTY AND REPAIR WARRANTY AND REPAIR YSI Model 95 Dissolved Oxygen Meters are warranted for two years from date of purchase by the end user against defects in materials and workmanship. YSI Model 95 probes and cables are warranted for one year from date of purchase by the end user against defects in material and workmanship.
  • Page 24 AUTHORIZED U.S. SERVICE CENTERS AUTHORIZED U.S. SERVICE CENTERS North and East Region YSI Incorporated • Repair Center • 1725 Brannum Lane • Yellow Springs, Ohio • 45387 • Phone: (800) 765-4974 • (937) 767-7241• E-Mail: info@ysi.com South Region C.C. Lynch & Associates • 212 E. 2nd Street • Suite 203 • Pass Christian, Mississippi • 39571 •...
  • Page 25 INTERNATIONAL SERVICE CENTERS INTERNATIONAL SERVICE CENTERS YSI Incorporated • Repair Center • 1725 Brannum Lane • Yellow Springs, Ohio • 45387 • Phone: (937) 767-7241• E-Mail: info@ysi.com Lynchford House • Lynchford Lane • Farnborough • Hampshire • GU146LT • Phone: (44-1252) 514711 •...
  • Page 26 We will contact the sender for instructions as to the disposition of the equipment. 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 27 Model No. of Device ______ Lot Number _________ Contaminant (if known) _____________________ Cleaning Agent(s) used _____________________ Radioactive Decontamination Certified? (Answer only if there has been radioactive exposure) ___ Yes ___ No Cleaning Certified By _________________________ Name Date YSI Incorporated Model 95...

  • Page 28: Appendix A - General Specifications

    200% air. 0 to 50 mg/L 0.01 mg/L + 5% for 200% to 500% air DO Response Time: Application dependent. Typically 60 sec for 95% of the change at 25°C Temperature Response Time: Typically 95% of the change Temperature Compensation:...
  • Page 29 2 in/sec at 120 nA nominal current 1-mil membrane: <3% error in stagnant water or <1% at a flow rate of 2 in/sec at 100 nA nominal current Data Storage: 50 points with ID number. YSI Incorporated Model 95...

  • Page 30: Appendix Brequired 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, DC 20402, Stock No. 0004-000-00345-4. YSI Incorporated Model 95...

  • Page 31: Appendix C - Accessories And Replacement Parts

    APPENDIX C ACCESSORIES AND REPLACEMENT PARTS ACCESSORIES AND REPLACEMENT PARTS ACCESSORIES AND REPLACEMENT PARTS ACCESSORIES AND REPLACEMENT PARTS The following parts and accessories are available from YSI or any Franchise Dealer authorized by YSI. YSI Order Number Description 9501 Replacement Membrane Cap Kit, 0.5 mil ( 6 each )

  • Page 32: Appendix D - Unit Conversion

    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 95...

  • Page 33: 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 95...
  • Page 34 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 95 in accordance with the instructions outlined in the section entitled Calibration YSI Incorporated Model 95...

  • Page 35: 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 95...
  • Page 36 1700/1725 Brannum Lane Yellow Springs, Ohio 45387 USA (800) 765-4974 (937) 767-7241 FAX: (937) 767-9320 Website: http://www.ysi.com E-MAIL: info@ysi.com ITEM # 059976 DRW # A59976D October 1998...

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