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YSI 550 DO Operation Manual

Handheld,dissolved,oxygen and temperature system
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YSI 550
Handheld
Dissolved
Oxygen and
Temperature
System
Operations
Manual

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Summary of Contents for YSI 550 DO

  • Page 1 YSI 550 Handheld Dissolved Oxygen and Temperature System Operations Manual...

  • Page 3: Table Of Contents

    CONTENTS SECTION 1 GENERAL DESCRIPTION......................3 1.1 K ............................3 EYPAD AYOUT SECTION 2 PREPARING THE YSI 550 ......................4 2.1 U ............................... 4 NPACKING 2.2 W ............................. 4 ARRANTY 2.3 B ..............................4 ATTERIES 2.4 T ........................ 5 URNING THE NSTRUMENT 2.5 C...

  • Page 5: Section 1 General Description

    The YSI 550 DO Instrument is designed for field use and is available with cable lengths of 12 or 25 feet. The body of the probe has been manufactured with stainless steel to add rugged durability and sinking weight.

  • Page 6: Section 2 Preparing The Ysi 550

    YSI 550 DO Instrument should ever need repair. 2.3 BATTERIES There are a few things you must do to prepare your YSI 550 DO instrument for use. First, locate the 4 C-size alkaline batteries that were included with your instrument. See Figure 2.

  • Page 7: Turning The Instrument On

    The light will power off automatically after two minutes of non-use. 2.5 CHANGING THE TEMPERATURE UNITS The YSI 550 DO Instrument can display the temperature units in either Fahrenheit or Celsius. To change the units that are displayed, turn the instrument on. Pressing both the down arrow key and the mode key at the same time will switch the units between C or F.

  • Page 8: Hand Strap

    The YSI 550 DO Instrument’s storage chamber can be conveniently used from either side of the instrument. To attach the rubber stopper to the calibration chamber, first remove the chamber from the instrument by unscrewing the two screws. After the chamber is free from the instrument, the rubber stopper can be removed from the chamber by pulling the “tail”...

  • Page 9: Section 3 Preparing The Probe

    3.3 PROBE PREPARATION The YSI 550 DO probe is shipped dry. Before using the YSI 550, the protective membrane cap on the probe tip must be removed, the new membrane cap must be filled with electrolyte solution and installed.

  • Page 10: Probe Operation And Precautions

    CAUTION: Do not touch the membrane surface. 3.5 PROBE OPERATION AND PRECAUTIONS NOTE: The YSI 550DO Instrument should not be used in a purpose other than that specified by YSI Incorporated. See Section 7, Warranty and Repair for details. It is important to recognize that oxygen dissolved in the sample is consumed during probe operation.

  • Page 11: Probe Maintenance

    O-ring. Turn the instrument on and allow the system to stabilize for at least 30 minutes. If, after several hours, you are still unable to calibrate, return the YSI 550 DO Instrument to a YSI authorized service center for service, See Section 7, Warranty and Repair for more information.

  • Page 12: How To Replace The Do Probe Tip

    Along with the YSI 559 dissolved oxygen module, a YSI 5906 membrane kit, the set screw that holds the sensor in place, YSI supplies a hex key wrench to help install the probe, and an instruction sheet. See Figure 6.
  • Page 13 Wrench Figure 6 7. The YSI 559 DO module is shipped dry. Before using the YSI 550 with a new YSI 559 sensor, the protective membrane on the probe tip must be removed, the membrane cap must be filled with electrolyte solution and a new membrane must be installed. Follow the instructions below to install the electrolyte solution and membrane.

  • Page 14: Section 4 Calibration

    Before you calibrate the YSI 550 DO Instrument complete the procedures discussed in Section 2, Preparing the YSI 550 and Section 3, Preparing the Probe. You can calibrate the YSI 550 DO Instrument in either mg/L or % saturation. In the section below, you will find instructions on how to calibrate and change between these modes.
  • Page 15 Make sure that the DO reading (large display) is stable, then press the ENTER button. The YSI 550 DO instrument 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 16 % air saturation mode by pressing the MODE key. If you are working in a dark area and have difficulty reading the LCD, press and hold the LIGHT key to activate the back-light of the YSI 550. The ON/OFF key turns the instrument on or off. For best results: Each time the YSI 550 DO Instrument is turned off, re-calibrate before taking measurements.

  • Page 17: Section 5 Principles Of Operation

    DO errors caused by temperature compensation for measurements at ±10°C from calibration temperature: ±1% (0.08 mg/L at 25°C) • DO errors caused by temperature measurement errors: A maximum ±0.2°C temperature error is equal to ±0.5% (0.04mg/L at 25°C). YSI Incorporated YSI 550 DO Handheld Instrument...
  • Page 18 (r.m.s.) calculation: ½ r.m.s. error = ±[1a + 1b + 2a + 2b + 3a + 3b mg/L NOTE: This sample calculation is for a near extreme set of conditions. YSI Incorporated YSI 550 DO Handheld Instrument...

  • Page 19: Section 6 Troubleshooting

    20 mg/L or below 0 mg/L salinity compensation (4). B. System requires service B. Replace membrane and Electrolyte (3.4) C. Clean anode (3) D. Clean cathode (3) E. Return system for service (7) YSI Incorporated YSI 550 DO Handheld Instrument...
  • Page 20 A. Sample temperature is more than A. Reduce the sample temperature C (122 B. Recalibrate using correct altitude and B. System requires service salinity compensation (4). Main display reads "Er 7" C. Return system for service (7) YSI Incorporated YSI 550 DO Handheld Instrument...

  • Page 21: Section 7 Warranty And Repair

    SECTION 7 WARRANTY AND REPAIR The YSI 550 DO Instrument is warranted for three years from date of purchase by the end user against defects in materials and workmanship. YSI 550 DO probes and cables are warranted for one year from date of purchase by the end user against defects in material and workmanship. Within the warranty period, YSI will repair or replace, at its sole discretion, free of charge, any product that YSI determines to be covered by this warranty.
  • Page 22 AUTHORIZED U.S. SERVICE CENTERS North 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 •...
  • Page 23 INTERNATIONAL SERVICE CENTERS YSI Incorporated • Repair Center • 1725 Brannum Lane • Yellow Springs, Ohio • 45387 • Phone: (937) 767-7241• E-Mail: info@ysi.com YSI Europe • Lynchford House • Lynchford Lane • Farnborough • Hampshire • GU146LT • Phone: (44-1252) 514711 • Fax: (44-1252) 511855 • Tlx: 858210 YSI Japan •...

  • Page 24: Cleaning Instructions

    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 25 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 YSI 550 DO Handheld Instrument...

  • Page 26: Appendix A Specifications

    Temperature Compensation: Automatic 4 alkaline C-cells Power: Size: 4.7 in. width; 9 in. length (11.9 cm x 22.9 cm) Weight with Batteries: 2 lb. (0.91 kg) Battery life: ° Over 2000 hours at 25 YSI Incorporated YSI 550 DO Handheld Instrument...

  • Page 27: Appendix B Required Notice

    YSI Instrument away from the receiver • plug the YSI Instrument into a different outlet so that the computer and receiver are on different branch circuits. If necessary, the user should consult the dealer or an experienced radio/television technician for additional suggestions.

  • Page 28: Appendix C Accessories/Replacement Parts

    APPENDIX C ACCESSORIES/REPLACEMENT PARTS The following parts and accessories are available from YSI or any YSI Authorized Dealer. YSI Model Number Description Replacement DO Module 5906 6 Cap Membranes and Electrolyte Solution 5238 Probe Reconditioning Kit (sanding tool and disks for cathode cleaning)

  • Page 29: Appendix D Solubility Table

    Chlorinity = Measure of chloride content, by mass, of water. ) = 1.806550 x Chlorinity ( This table is provided for your information only. It is NOT required when calibrating the YSI 550 DO Instrument in accordance with the instructions outlined in the Section 4, Calibration.
  • Page 30 6.03 5.75 5.49 5.24 5.01 42.0 6.21 5.93 5.67 5.41 5.17 4.93 43.0 6.12 5.84 5.58 5.33 5.09 4.86 44.0 6.02 5.75 5.50 5.25 5.02 4.79 45.0 5.93 5.67 5.41 5.17 4.94 4.72 YSI Incorporated YSI 550 DO Handheld Instrument...

  • Page 31: Appendix E Conversion Chart

    Feet Multiply by 3.2808399 (°C × 9/5) + 32 Degrees Celsius Degrees Fahrenheit (°F - 32) × 5/9 Degrees Fahrenheit Degrees Celsius Milligrams per liter (mg/L) Parts per million (ppm) Multiply by 1 YSI Incorporated YSI 550 DO Handheld Instrument...
  • Page 32 1700/1725 Brannum Lane Yellow Springs, Ohio 45387 USA (800) 765-4974 (937) 767-7241 FAX: (937) 767-9320 Item #655126 Drawing # A655126 Revision A...

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