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compensate automatically for changes in membrane permeability caused by variations in temperature.
However, the thermal response of this sensor is much slower in air or gas than the membrane’s
response to a change in gas temperature. Therefore, rapid temperature fluctuations are liable to
prevent the automatic compensation that is necessary for accurate measurement. This is not a problem
is liquid measurements.

4.5 RECORDER

OUTPUT

Output at full scale is 1VDC. (0.0005V = 1 digit). Use a recorder with input impedance of at least
50K OHM, and operate it with the terminals ungrounded.

A recorder output plug is provided. Cable for connecting the recorder must be supplied by the user.

YSI Incorporated

YSI 58 DO Meter

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Содержание 58

Страница 1: ...YSI 58 Dissolved Oxygen Meter Operations Manual ...

Страница 2: ......

Страница 3: ... 4 2 TURNING THE INSTRUMENT ON 11 4 3 CALIBRATION 11 4 3 1 AIR CALIBRATION 12 4 3 2 WINKLER TITRATION 13 4 3 3 AIR SATURATED WATER CALIBRATION 13 4 3 4 CALIBRATION FREQUENCY 14 4 4 MAKING MEASUREMENTS 14 4 4 1 ENVIRONMENTAL CONSIDERATIONS 14 4 4 2 MEASURING OXYGEN IN FLUIDS OTHER THAN WATER 15 4 4 3 CALIBRATING TO DISPLAY OXYGEN PARTIAL PRESSURE IN MM HG 15 4 5 RECORDER OUTPUT 16 SECTION 5 CARE AN...

Страница 4: ...APPENDIX B REQUIRED NOTICE 30 APPENDIX C ACCESSORIES AND REPLACEMENT PARTS 31 APPENDIX D UNIT CONVERSION CHART 32 APPENDIX E OXYGEN SOLUBILITY TABLE 33 APPENDIX F CALIBRATION VALUES TABLE 35 ii ...

Страница 5: ...s to enter When a polarizing voltage is applied across the sensor oxygen that has passed through the membrane reacts at the cathode causing a current to flow The membrane passes oxygen at a rate proportional to the pressure difference across it Since oxygen is rapidly consumed at the cathode it can be assumed that the oxygen pressure inside the membrane is effectively zero Hence the force causing ...

Страница 6: ...The LOBAT warning shows on the display when about 50 hours of use remain This warning reminds the operator to change batteries at their earliest convenience Batteries may be removed when the instrument will be used on a long term basis for laboratory measurement powered by the YSI 5401 or 5402 battery eliminator Stirrer batteries fit in the lower battery holder Four D size carbon zinc batteries ar...

Страница 7: ... the DO and temperature sensors enclosed in a heavy duty probe guard A 10 25 or 50 foot cable is directly connected to the probe body making it waterproof A 5 pin MS connector at the end of the cable makes the 5239 fully compatible with all YSI 50 series DO meters retaining the accuracy of the system The 5239 has been optimized for YSI meters which have a microprocessor for sampling and processing...

Страница 8: ...be the 5795A Submersible Stirrer has a dual purpose cable to which both stirrer and probe are connected YSI 5795A SUBMERSIBLE STIRRER The YSI 5795A Stirrer which can only be used with the 5739 probe features a single cable for both probe and stirrer to permit convenient manipulation and storage Figure 1 When a stirrer and probe are assembled the stirrer agitates the sample directly in front of the...

Страница 9: ...rt of a unique pressure compensating system that helps assure accurate readings at great depths of water Pressure compensation is effective to 0 5 of reading with pressures to 100psi 230 feet water The quantity of air bubbles trapped under the membrane determines how serious the pressure error will be which is why proper preparation of the probe is essential See Section 4 Operation The system is d...

Страница 10: ...le you need to replace the membrane The gold cathode should always be bright and untarnished If it is tarnished which can result from contact with certain gases or plated with silver which can result from extended use with a loose or wrinkled membrane return it to YSI for service You can also clean the gold cathode with the YSI 5680 Probe Reconditioning Kit Never use chemicals or any abrasive othe...

Страница 11: ...uctions to change membrane caps 1 Remove the stir paddle from the probe by pulling it straight out See figure 3 2 Unscrew the old membrane cap from the probe Before installing a new membrane clean the probe tip with deionized water in order to remove any contaminants 3 Hold the membrane cap and fill it at least half full with the electrolyte solution provided Screw the membrane cap onto the probe ...

Страница 12: ...ave similar sensors and should be cared for in the same way They are precision devices and require careful treatment if measurements of high accuracy are to be made Prepare the probe as described below 1 ADD DI OR DISTILLED WATER Figure 4 WARNING All probes are shipped dry you must follow these instructions 1 Open the membrane kit and prepare the electrolyte solution Dissolve the KCl in the droppe...

Страница 13: ...r side of the sensor The membrane should conform to the face of the sensor 6 Secure the end of the membrane under the forefinger of your left hand 7 Roll the O ring over the end of the probe being careful not to touch the membrane surface with your fingers There should be no wrinkles or trapped air bubbles Small wrinkles may be removed by lightly tugging on the edges of the membrane If bubbles are...

Страница 14: ...different temperatures because of the different solubility of oxygen at different temperatures Figure 7 Cathode gold Anode silver Temperature sensor Cathode reaction O2 2H2O 4e 4OH Anode reaction Ag Cl AgCl THE DO READINGS FROM THE CATHODE REDUCTION The oxygen reduction current is sampled and processed by the meter and displayed as either air saturation or mg L While the parameter of air partial p...

Страница 15: ...ew the retaining ring finger tight 2 Zero the instrument Set the function switch to ZERO and adjust the display to read 00 0 with the O2 ZERO control 3 If using a stirrer connect it now Check the stirrer battery condition by turning the STIRRER switch to its spring loaded BATT CHK position The warning LOBAT will show on the display when approximately 5 hours of battery life remain 4 Wait at least ...

Страница 16: ...BOD probes can be placed in a BOD bottle containing about one inch of water to provide a 100 relative humidity calibration environment 4 Remember that the highest accuracy of measurement is achieved when the probe is zeroed and calibrated at a temperature as close as possible to the temperature of the sample to be measured 5 Set the function switch to ZERO and readjust the display to read 0 00 Swi...

Страница 17: ...and stable saturation Proceed as follows 1 Air saturate a volume of water by aerating for at least 15 minutes at a constant temperature 2 Place the probe in the sample and stir Switch the function switch to TEMP from the solubility of oxygen chart in Appendix E note the temperature of the sample and record the mg L value corresponding to the temperature indicated 3 Determine the local altitude or ...

Страница 18: ...pared for use and the probe calibrated place the probe in the sample If the 5795A stirrer is to be used connect it and turn the STIRRER switch to ON Connect the recorder if it is used 2 Adjust the SALINITY control to the salinity of the sample Not required when reading air saturation 3 Turn the function switch to 02 ZERO and readjust if necessary 4 Turn the function switch to the desired readout m...

Страница 19: ...ally programmed in the mg L mode for water 4 4 3 CALIBRATING TO DISPLAY OXYGEN PARTIAL PRESSURE IN mm HG For some liquid measurements and for most gas phase measurements it may be desirable to read the meter in oxygen partial pressure units such as millimeters of mercury mm Hg To calibrate the air saturation mode to mm Hg units 0 to 200 00 mm Hg range proceed as follows 1 Remove the back cover and...

Страница 20: ...ature fluctuations are liable to prevent the automatic compensation that is necessary for accurate measurement This is not a problem is liquid measurements 4 5 RECORDER OUTPUT Output at full scale is 1VDC 0 0005V 1 digit Use a recorder with input impedance of at least 50K OHM and operate it with the terminals ungrounded A recorder output plug is provided Cable for connecting the recorder must be s...

Страница 21: ...d fall below 1 air saturation 3 Calibration Stability Carefully calibrate the probe in moist air inside the calibration bottle with the instrument set in the air saturation mode Allow the instrument to operate for one hour A properly functioning probe will hold calibration within 1 for one hour after the first hour of operation If the probe fails any of the three tests above check for Damaged or w...

Страница 22: ... 6 Do not allow the probe to strike hard objects The membrane or sensor inside may be damaged 5 3 1 5905 AND 5239 PROBE CARE ELECTRODE CLEANING The 5905 and 5239 probes should be cleaned only when erratic readings occur or after about every 500 hours of use two months Each cleaning removes material so excessive cleaning should be avoided GOLD CATHODE For correct probe operation the gold cathode mu...

Страница 23: ...robe overnight in a 3 ammonia solution rinse with deionized water and follow the steps to install a new membrane If it is not possible to calibrate return the probe to an authorized YSI Repair Center 5 4 PROBE STORAGE For long term storage 4 weeks remove the membrane thoroughly rinse the sensor with deionized or distilled water and install a new membrane Store the sensor in a humid environment suc...

Страница 24: ...caused by temperature measurement errors A maximum 0 2 C temperature error is equal to 0 5 0 04mg L at 25 C Type 3 Errors A Altitude The maximum DO error caused by calibrating to altitude in increments of 100 feet 0 18 0 015 mg l at 25 C B Humidity Errors occur if calibration is performed at less than 100 humidity The worst possible case would be calibration at 0 humidity The error varies with the...

Страница 25: ... value is incorrect Recalibrate w correct value 4 3 Probe not in 100 water saturated air during Cal procedure Moisten sponge place in Cal chamber w probe Recal 4 3 Membrane fouled or damaged Replace membrane 3 2 Probe anode is fouled or dark Clean anode 5 Probe cathode is fouled Resurface cathode 5 Dissolved Oxygen readings are inaccurate System requires service Return system for service 8 LCD dis...

Страница 26: ... not working on the 5905 Replace motor 8 Check if stir paddle is pushed all the way in 3 1 2 Replace motor 8 Loud motor on the 5905 Bent stir paddle Replace stir paddle 8 Membrane cap is tight on the 5905 Use pliers to loosen the cap turn counter clockwise while facing sensor tip 3 2 YSI Incorporated YSI 58 DO Meter 22 ...

Страница 27: ...m date of repair or replacement LIMITATION OF WARRANTY This Warranty does not apply to any YSI product damage or failure caused by i failure to install operate or use the product in accordance with YSI s written instructions ii abuse or misuse of the product iii failure to maintain the product in accordance with YSI s written instructions or standard industry procedure iv any improper repairs to t...

Страница 28: ...nformation on the nearest authorized service center contact YSI Technical Support 1725 Brannum Lane Yellow Springs Ohio 45387 Phone 800 765 4974 US 1 937 767 7241 Email environmental ysi com www ysi com YSI Incorporated YSI 58 DO Meter 24 ...

Страница 29: ...YSI Incorporated YSI 58 DO Meter 25 ...

Страница 30: ...ice personnel 1 In a manner appropriate to each device decontaminate all exposed surfaces including any containers 70 isopropyl alcohol or a solution of 1 4 cup bleach to 1 gallon tap water is suitable for most disinfecting Instruments used with waste water may be disinfected with 0 5 Lysol if this is more convenient to the user 2 The user shall take normal precautions to prevent radioactive conta...

Страница 31: ...te ______ Zip ________ Country __________________ 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 58 DO Meter 27 ...

Страница 32: ...emperature 5 to 45 C 0 1 C 0 3 C plus probe interchangeability Dissolved Oxygen 0 to 200 Air Sat 0 to 20 00 mg L 0 1 01 mg L 0 3 Air Saturation 0 03 mg L Temperature Compensation The mg L modes are automatically temperature compensated to an accuracy of 1 of the dissolved oxygen reading between 5 and 45 C and to an accuracy of 2 between 0 and 5 C See Temperature Sensitivity in probe specifications...

Страница 33: ...ividual probe may vary slightly according to its condition Therefore a probe should be calibrated at a temperature close to the measurement temperature in order to minimize the possible effect of such variation Temperature Sensor Accuracy 0 2 C Pressure Compensation Effective 0 5 of reading with pressures to 100 psi 230 feet of seawater Polarizing Voltage 0 8 volts nominal Probe Current Air at 30 ...

Страница 34: ...d to try to correct the interference by one or more of the following measures re orient the receiving antenna relocate the computer with respect to the receiver move the computer away from the receiver plug the computer 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 techni...

Страница 35: ...Use 5401 Battery Eliminator 115 VAC 5402 Battery Eliminator 230 VAC 5795A Submersible Stirrer With power and probe cables Requires 5739 probe 5050 Carrying Case 5906 Membrane Kit 5775 Membrane and KCl Kit Standard Includes two 15 membrane packets 001 thick standard membranes and a 30 ml bottle of KCl electrolyte with Kodak Photo Flo 5776 Membrane and KCl kit High Sensitivity Includes tow 15 membra...

Страница 36: ...ion Feet Meters Multiply by 0 3048 Meters Feet Multiply by 3 2808399 Degrees Celsius Degrees Fahrenheit 9 5 o C 32 Degrees Fahrenheit Degrees Celsius 5 9 o F 32 Milligrams per liter mg l Parts per million ppm Multiply by 1 YSI Incorporated YSI 58 DO Meter 32 ...

Страница 37: ...10 92 10 27 9 66 5 0 12 77 12 02 11 32 10 66 10 03 9 44 6 0 12 45 11 73 11 05 10 40 9 80 9 23 7 0 12 14 11 44 10 78 10 16 9 58 9 02 8 0 11 84 11 17 10 53 9 93 9 36 8 83 9 0 11 56 10 91 10 29 9 71 9 16 8 64 10 0 11 29 10 66 10 06 9 49 8 96 8 45 11 0 11 03 10 42 9 84 9 29 8 77 8 28 12 0 10 78 10 18 9 62 9 09 8 59 8 11 13 0 10 54 9 96 9 42 8 90 8 41 7 95 14 0 10 31 9 75 9 22 8 72 8 24 7 79 15 0 10 08...

Страница 38: ... 90 31 0 7 43 7 07 6 73 6 41 6 10 5 81 32 0 7 31 6 96 6 62 6 31 6 01 5 72 33 0 7 18 6 84 6 52 6 21 5 91 5 63 34 0 7 07 6 73 6 42 6 11 5 82 5 55 35 0 6 95 6 62 6 31 6 02 5 73 5 46 36 0 6 84 3 52 6 22 5 93 5 65 5 38 37 0 6 73 6 42 6 12 5 84 5 56 5 31 38 0 6 62 6 32 6 03 5 75 5 48 5 23 39 0 6 52 6 22 5 98 5 66 5 40 5 15 40 0 6 41 6 12 5 84 5 58 5 32 5 08 41 0 6 31 6 03 5 75 5 49 5 24 5 01 42 0 6 21 5...

Страница 39: ... 52 699 93 2 2290 698 92 27 24 692 92 2 2587 789 91 26 93 684 91 2 2887 880 90 26 61 676 90 2 3190 972 89 26 34 669 89 2 3496 1066 88 26 02 661 88 2 3804 1160 87 25 75 654 87 1 4115 1254 86 25 43 646 86 1 4430 1350 85 25 12 638 85 1 4747 1447 84 24 84 631 84 1 5067 1544 83 24 53 623 83 1 5391 1643 82 24 25 616 82 1 5717 1743 81 23 94 608 81 1 6047 1843 80 23 62 600 80 0 6381 1945 79 23 35 593 79 0...

Страница 40: ...1700 1725 Brannum Lane Yellow Springs Ohio 45387 USA 800 765 4974 US 1 937 767 7241 FAX 937 767 9353 Website www ysi com Email environmental ysi com ITEM 069387 Web DRW A58020K January 1999 ...

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