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Preparing the Probe

Section 3

YSI Incorporated

Model 95

5

 

WARNING:

 Use only YSI MEA probe solution in the membrane cap. Any other solution will

damage the MEA sensor.

Figure 2

Unscrew cap

Unscrew guard

Fill new membrane
cap with 8-9 drops 
of MEA probe
solution.

Tap cap with finger
to remove bubbles.

Screw guard on
tightly by hand

Screw cap on
tightly by hand

Содержание 95

Страница 1: ...DEL 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 ...

Страница 2: ......

Страница 3: ...TION AND MG L 11 4 9 DISSOLVED OXYGEN FILTER 11 4 10 DISPLAY BACKLIGHT 11 SECTION 5 PRINCIPLES OF OPERATION 12 5 1 MEA CLARK OXYGEN SENSOR 12 5 2 DO READINGS FROM THE CATHODE REDUCTION 13 5 3 FORMATION OF AGCL AT THE ANODE 13 5 4 FUNCTION OF THE ELECTROLYTE 13 SECTION 6 MAINTENANCE OF THE MEA SENSOR 14 6 1 ANODE SERVICE 14 6 2 CATHODE SERVICE 14 6 3 DISSOLVED OXYGEN PROBE PRECAUTIONS 15 6 4 PROBE ...

Страница 4: ...ii ...

Страница 5: ...th stainless steel to add rugged durability and sinking weight The silver anode of the MEA DO sensor requires no servicing for up to 10 000 hours four years of operation under normal operating conditions no sulfite contamination The Model 95 s micro processor allows the system to be easily calibrated with the press of a few buttons Additionally the micro processor performs a self diagnostic routin...

Страница 6: ...ease complete the Warranty Card and return it to YSI The warranty card allows the entry of your purchase of this instrument in our computer system Once your purchase is recorded you will receive prompt efficient service if any part of your YSI Model 95 needs repair during the warranty period 2 3 2 3 2 3 2 3 BATTERIES BATTERIES BATTERIES BATTERIES There are a few things you must do to prepare your ...

Страница 7: ...ge area for the probe during transport and extended non use If you look into the chamber you should notice a small round sponge in the bottom Carefully put about 10 drops of clean water into the sponge Turn the instrument over and allow any excess water to drain out of the chamber The wet sponge creates a 100 water saturated air environment for the probe that is ideal for dissolved oxygen calibrat...

Страница 8: ...ow flow or stagnant water a 1 mil 001 membrane is available YSI Model 9502 Membrane Cap Kit This membrane requires less stirring than the 9501 but has a much slower response Use this membrane when minimal stirring 2 sec is available 3 2 3 2 3 2 3 2 MEMBRANE CAP INSTALLATION MEMBRANE CAP INSTALLATION MEMBRANE CAP INSTALLATION MEMBRANE CAP INSTALLATION WARNING Use only YSI MEA probe solution in the ...

Страница 9: ...I MEA probe solution in the membrane cap Any other solution will damage the MEA sensor Figure 2 Unscrew cap Unscrew guard Fill new membrane cap with 8 9 drops of MEA probe solution Tap cap with finger to remove bubbles Screw guard on tightly by hand Screw cap on tightly by hand ...

Страница 10: ...odel 95 6 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 ...

Страница 11: ...hamber contains a moist sponge to create a 100 water saturated air environment Before calibrating the YSI Model 95 complete the procedures discussed in the Preparing the Meter and Preparing the Probe sections of this manual To accurately calibrate the YSI Model 95 you will need to know the following information The approximate altitude of the region in which you are located The approximate salinit...

Страница 12: ...then press the ENTER button The display should read SAVE then should return to the Normal Operation Mode For best results Each time the Model 95 is turned off re calibrate before taking measurements Calibrate at a temperature within 10 C of the sample temperature 4 3 4 3 4 3 4 3 MAKING MEASURMENTS MAKING MEASURMENTS MAKING MEASURMENTS MAKING MEASURMENTS The Model 95 has four modes Ø Dissolved Oxyg...

Страница 13: ...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 While dissolved oxygen is displayed on the screen in or mg L depress the ENTER button and hold it for approximately 2 seconds The meter will flash SAVE on the display along with the current site identity 1 through 50 being used When all...

Страница 14: ...Site ID 1 Site ID 2 Site ID 3 If the UP ARROW button was pressed the Model 95 would display Site ID 2 Site ID 4 Site ID 5 4 7 4 7 4 7 4 7 ERASING STORED DATA ERASING STORED DATA ERASING STORED DATA ERASING STORED DATA 1 To erase the data that is stored in the Model 95 s memory depress the MODE button until the Model 95 displays ErAS on the screen 2 Depress and hold the DOWN ARROW and ENTER buttons...

Страница 15: ...e the filter enter the filter option menu by pressing both the DOWN ARROW and MODE keys together Ú key slightly ahead Operation procedures Press both the DOWN ARROW and MODE keys together Ú Ú Ú Ú key slightly ahead The current status of the filter is displayed On or OFF with a smaller FIL displayed in the bottom right corner of the screen Press the UP ARROW or DOWN ARROW key to change the current ...

Страница 16: ...usion layers from adjacent cathode surfaces This design produces the minimal stirring dependence of the MEA probe The temperature sensing element thermistor assembly is mounted next to the oxygen sensor vertically see Figure 1 providing temperature readings for the DO system The membrane selectively allows oxygen to permeate into the sensor but prevents most interfering molecules and fouling mater...

Страница 17: ...ng a thin layer of silver chloride Furthermore the oxidation of silver at the chloride medium provides a stable potential that the cathode potential is referenced to for instance the polarization potential of the cathode is 1 0 V versus the potential of the Ag AgCl redox couple at the silver anode Since the current of the MEA sensor is so small there should not be any significant accumulation of A...

Страница 18: ...he silver anode has become fouled gently wet sand it using 400 grit wet dry sandpaper rinse thoroughly with deionized or distilled water and wipe with a wet paper towel until the dark layer is removed The directions are as follows Anode Cleaning Procedures See figure 6 ü Rinse the sensor thoroughly after removing the membrane cap ü Use wet 400 grit sandpaper to sand away the top layer of the anode...

Страница 19: ...e 2 Erratic readings are a result of loose wrinkled damaged or fouled membranes or from large more than 1 4 of the circumference of the probe bubbles in the electrolyte reservoir If erratic readings or evidence of membrane damage occurs you should replace the membrane cap and the KCl solution The average replacement interval is two to four weeks 3 If the membrane is coated with oxygen consuming e ...

Страница 20: ...mpensation for measurements at 10 C from calibration temperature 1 of 25 C 0 08 mg l B 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 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 ...

Страница 21: ...thode is fouled F System requires service A Recalibrate w correct value Section 4 B Moisten sponge place in Cal chamber w probe Recal Section 4 C Replace membrane cap Section 3 D Clean anode Section 6 E Buff cathode Section 6 F Return system for service Section 9 5 LCD displays LO BAT A Batteries are low or damaged A Replace batteries Section 2 6 Main Display reads OVEr Secondary display reads ovr...

Страница 22: ...nt too low to calibrate 10 Main display reads FAIL Secondary display reads eep A EEPROM has failed to respond in time A Return the system for service Section 9 11 Readings on main display don t change A Meter is in recall mode A Press MODE button to return to Normal Operation Section 4 ...

Страница 23: ...anted for the balance of the original warranty period or at least 90 days from 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 wri...

Страница 24: ...Avenue Suite D Concord CA 94520 Phone 800 550 5875 Fax 510 674 8655 Central Region HydroTech Services LLC 4910 Iris Street Wheat Ridge CO 80033 Phone 877 467 0800 Fax 303 467 0742 E Mail 100735 423 compuserve com West North East South Florida Georgia South Carolina North Carolina Virginia West Virginia Pennsylvania Delaware New Jersey Maryland Connecticut Rhode Island Massachusetts New Hampshire M...

Страница 25: ...ing 6 5 6 13 Shinjuku Shinjuku ku Tokyo 160 Phone 81 3 5360 3561 Fax 81 3 5360 3565 SPECIALTY SERVICE CENTERS SPECIALTY SERVICE CENTERS SPECIALTY SERVICE CENTERS SPECIALTY SERVICE CENTERS Aquaculture Aquatic Eco Systems Inc 1767 Benbow Court Apopka Florida Phone 407 886 3939 Fax 407 886 6787 Aquacenter 166 Seven Oaks Road Leland Mississippi 38756 Phone 601 378 2861 Fax 601 378 2862 Wastewater Q C ...

Страница 26: ...ps must be taken to insure the safety of our service 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 are suitable for most disinfecting Instruments used with waste water may be disinfected with 5 Lysol if this is more convenient to the user 2 The user shall take...

Страница 27: ..._______________________ City _______________ State ______ 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 ...

Страница 28: ...ter 4 hours without a key press Water Tightness Meets or exceeds IP65 standards Operating Environment Medium fresh sea or polluted water and most other liquid solutions Temperature 5 to 45 C Depth 0 to 10 0 to 25 0 to 50 or 0 to 100 feet depending on cable length Storage Temperature 5 to 55 C System Performance Specifications Measurement Range Resolution Accuracy Temperature 5 to 45 C 0 1 C 0 2 C ...

Страница 29: ...0 and 80 is based on extrapolation Stirring Dependence 0 5 mil membrane 5 error in stagnant water or 2 at a flow rate of 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 ...

Страница 30: ...n be determined by turning the equipment off and on the user is encouraged 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...

Страница 31: ... 6 each 9502 Replacement Membrane Cap Kit 1 mil 6 each 9503 MEA Probe Reconditioning Kit 5520 Carrying Case small 95 10 or 95 25 only 5050 Carrying Case medium 95 50 or 95 100 059965 Replacement Probe Cable Assembly 10 feet 059981 Replacement Probe Cable Assembly 25 feet 059984 Replacement Probe Cable Assembly 50 feet 059987 Replacement Probe and Cable Assembly 100 feet 059971 Replacement Front Ca...

Страница 32: ...RSION UNIT CONVERSION UNIT CONVERSION Conversion Chart To Convert From To Equation 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 ...

Страница 33: ... 2 0 13 83 13 00 12 22 11 48 10 79 10 14 3 0 13 46 12 66 11 91 11 20 10 53 9 90 4 0 13 11 12 34 11 61 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 ...

Страница 34: ...2 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 93 5 67 5 41 5 17 4 93 43 0 6 12 5 84 5...

Страница 35: ... 96 28 43 722 96 3 1413 431 95 28 11 714 95 2 1703 519 94 27 83 707 94 2 1995 608 93 27 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 8...

Страница 36: ...ITEM 059976 DRW A59976D October 1998 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 ...

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