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YSI Incorporated

Model 5000/5100 Service Manual

18

Code/Problem Error

Possible

Cause

Correction

E4:

Check

Membrane

DO High Current

Membrane too thin

Install new membrane and
KCl

Electrodes need resurfacing

See probe maintenance
instructions

Short circuit in probe, cable or
connector

Replace defective assembly

E5:

Check

Membrane

DO unstable

Membrane damaged

Replace membrane and KCl

Probe electrodes needs
servicing

See probe maintenance
instructions

Connector

improperly

installed

Check probe connection

Intermittent connection in
cable or plug

Replace defective assy

Probe malfunction

Replace defective assy

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Summary of Contents for 5000

Page 1: ...YSI MODEL 5000 YSI MODEL 5100 Dissolved Oxygen Temperature SERVICE MANUAL ...

Page 2: ......

Page 3: ...n 6 Diagnostics 15 6 1 History 15 6 2 Sensor 16 6 3 Reset Ps 16 Section 7 Troubleshooting Chart 17 Section 8 Test Procedure 19 Section 9 Maintenance 21 9 1 5000 and 5100 Instruments 21 Batteries 21 9 2 5910 and 5905 Dissolved Oxygen Probes 22 Electrode Cleaning 22 Section 10 Software Upgrade Procedure 23 Section 11 Disassembly Assembly Procedures 25 Section 12 Circuit Description 26 Section 13 Sch...

Page 4: ...ii ...

Page 5: ...r Model 5000 with YSI BOD Analyst software MODEL 5100 FEATURES The YSI Model 5100 has all of the same functionality of the Model 5000 plus many automated and application specific features The YSI 5100 is the first DO instrument to offer built in application software for the calculation of Oxygen Uptake Rate OUR and Specific Oxygen Uptake Rate SOUR These application features simplify compliance wit...

Page 6: ... 1 mmHg TEMPERATURE COMPENSATION The mg L mode is automatically temperature compensated to an accuracy of 1 of DO readings between 0 and 5 C and to an accuracy of 0 6 of readings between 5 and 45 C The air saturation mode is automatically temperature compensated to an accuracy of 0 5 of calibration values between 0 and 5 C and to an accuracy of 0 3 of values between 5 and 45 C SALINITY COMPENSATIO...

Page 7: ...ssed in each mode below them Functions in shaded boxes are only available on the model 5100 MAIN Store Reveiw Clear Send CALIBRATE Auto Cal DO Cal SETUP Display Report Stable System APPLICATION OUR SOUR Remote Print All Delete All Size Unit Contrast Last Digit SDF CDF Range Next Audio On Off Time Date Version RS 232 Start Setup End Print on off Start Setup End Print on off Skip Up Down Confirm DIA...

Page 8: ...up menu The bottom row of the display will show the following soft key setup selections 8 15 mg L 24 38 C 11 33AM DISPLAY REPORT STABLE SYSTEM These four selections are used to change the instrument setup 4 1 DISPLAY SETUP Press the DISPLAY soft key to show the following menu 8 15 mg L 24 38 C 11 33AM SIZE UNITS CONTRAST LAST DIG The SIZE soft key cycles among the two possible display arrangements...

Page 9: ...les among the three possibilities percent and milligrams per liter milligrams per liter and millibars or percent and millibars An example is shown below 8 71 mg L 208 mbar Display 0 0 ppt 740 mmHg 24 38 C 11 33AM SIZE UNITS CONTRAST LAST DIG The CONTRAST soft key allows the user to change the display contrast The display contrast will change slightly each time the UP or DOWN soft key is pressed Th...

Page 10: ... CDF to choose the report format press the MODE key to exit the Report menu Do NOT press ENTER as this will change the currently selected parameter To return to Main mode press MODE two more times The RANGE soft key brings up the following soft key menu SDF Space Delimited Format Report SAMPLE ID DATE DO TIME DO mg L BAROMETER TEMPERATURE SALINITY PRINT Record from 00 to 99 UP DOWN DIGIT NEXT This...

Page 11: ...up menu press the STABLE soft key to display the following menu Stable PARAMETERS 10 Time Duration 3 19 Seconds 0 3 DO variation 0 0 1 9 UP DOWN DIGIT NEXT This menu is used to change the autostable criteria Press the NEXT soft key to select between the time duration and the percent variation Use the DIGIT soft key to select the digit you wish to change by pressing UP or DOWN When you have finishe...

Page 12: ...lay digit that is flashing is increased or decreased by pressing the UP or DOWN soft key If the UP or DOWN soft key is held down the digit will continue to change until the key is released After you have set the hour press the NEXT soft key to move to the next parameter minutes Repeat the process for the remaining parameters When you have finished entering the time and date press ENTER to confirm ...

Page 13: ...N soft keys The remaining RS232 parameters are fixed as follows Data Length 8 bits Parity None Stop Bits 1 Press ENTER to confirm The RS232 sub menu can be left without making any changes by pressing the MODE key instead of ENTER Operation returns to the system setup menu Press MODE to return to the previous menu Setup To return to Main mode press MODE two more times ...

Page 14: ...n under Calibration Barometer The Model 5000 does not contain a barometer therefore the current barometric pressure must be entered before an AUTO Cal is performed Dissolved oxygen calibration must be done in an environment with a known oxygen content The simplest method will be discussed here calibration in air water saturated Calibration in air is the simplest and most accurate method of calibra...

Page 15: ...Calibrate 0 0 ppt 740 mmHg 24 38 C 11 33AM D O CALIBRATION SAVED AUTO CAL DO CAL SETUP DIAGNOSTICS Press MODE to return to the Main mode The instrument is now calibrated and ready to measure dissolved oxygen and temperature See Operation Main Mode Making Measurements DO CAL MANUAL 1 Prepare the probe according to the probe instructions 2 Connect the probe to the meter 3 Place the probe in a known ...

Page 16: ...ue in percent saturation using the UP DOWN and DIGIT soft keys If you wish to calibrate in milligrams per liter instead of percent use the NEXT soft key to select mg L then enter the calibration value in milligrams per liter as shown below 98 0 08 15 mg L Cal mg L 0 0 ppt 740 mmHg 24 38 C 11 33AM UP DOWN DIGIT NEXT 9 Press ENTER to confirm your calibration The screen will momentarily display D O C...

Page 17: ...DIGIT soft keys enter the true local barometric pressure This corresponds to a reading from a mercury barometer Do NOT use the pressure reported by the weather bureau which has been corrected to sea level Press ENTER to confirm The message PRESSURE CALIBRATION SAVED will be displayed 5 3 SALINITY Salt reduces the ability of water to hold oxygen in solution Enter the salinity of the sample you are ...

Page 18: ...you may place the probe in 100 nitrogen gas 1 Place the probe in the zero oxygen sample and allow at least 20 minutes for the probe to come to equilibrium 2 Press the CALIBRATE soft key to change to Calibration mode The following screen will be displayed 98 0 8 15 mg L Calibration 0 0 ppt 740 mmHg 24 38 C 11 33AM AUTO CAL DO CAL SETUP DIAGNOSTICS 3 Press the DO CAL soft key to enter the manual DO ...

Page 19: ...8 HISTORY SENSOR HELP RESET Ps The History screen displays information about the last five DO calibrations This information is useful for tracking the performance of the DO probe membrane The following parameters are displayed Date The date the calibration was performed Time The time the calibration was performed DO uA The dissolved oxygen calibration current in microamps The calibration current 1...

Page 20: ...croamps The factory default value is 0 075 uA This value will only change when a zero calibration is performed see Calibration Zero Calibration If this value is greater than 0 15uA after a zero calibration the membrane probe may need service See Troubleshooting Error Code E2 Probe Current The present real time DO probe current in microamps Pressure Offset The offset of the barometer in millibars P...

Page 21: ...be connection Intermittent connection in cable or plug Repair or replace Probe thermistor defective Should measure 2252 Ω 25o C Replace probe sensor assy Temperature over range Electrical leakage in connector or cable Repair or replace Probe thermistor defective Should measure 2252 Ω 25o C Repair probe sensor assy E2 Check Membrane High Background current DO Insufficient warm up time See Calibrati...

Page 22: ...g See probe maintenance instructions Short circuit in probe cable or connector Replace defective assembly E5 Check Membrane DO unstable Membrane damaged Replace membrane and KCl Probe electrodes needs servicing See probe maintenance instructions Connector improperly installed Check probe connection Intermittent connection in cable or plug Replace defective assy Probe malfunction Replace defective ...

Page 23: ... Tested set test box to A 1 set the IBT to MAIN Mode B Set the test box to the following positions and note temp display Set Test Box to Resistor input J5 Pins 4 5 Display Reading A 1 9534 Ω 0 25 5 0 0 2 C A 2 4482 Ω 0 25 10 0 0 2 C A 3 2252 Ω 0 25 25 0 0 2 C A 4 984 Ω 0 25 45 0 0 2 C A 5 Infinity E 1 CHECK PROBE 2 Oxygen Range Check Range A Set test box to D 2 position let the readings stabilize ...

Page 24: ...e D Perform the following checks for Mg L 02 Set Test Box to Resistor input J5 Pins 2 3 Display Reading A 2 88 2k Ω 0 1 11 28 0 02 Mg L B 2 111 42k Ω 0 1 8 92 0 02 Mg L C 2 250 0k Ω 0 1 3 97 0 02 Mg L D 2 Infinity 0 00 0 01 Mg L 4 Salinity Compensation Check A Set test box to A 2 position Press the DO CAL soft key to enter DO CAL mode again Press the NEXT soft key twice Press the UP DOWN and DIGIT...

Page 25: ... 38 C 11 33AM STORE REVIEW SEND CALIBRATE When the indicator appears replace the batteries with 4 fresh alkaline C size batteries as soon as possible Turn off the instrument Turn the instrument over and set it on a padded surface Slide the battery cover to the right as indicated on the cover and remove it Remove the old batteries and install fresh alkaline batteries NOTE Always observe the correct...

Page 26: ...must be textured properly It can become tarnished or plated with silver after extended use The gold cathode can be cleaned by using the adhesive backed sanding disc provided in the 5906 Membrane Kit Stick the disc to a small flat object like a bottle cap then sand the gold with a twisting motion about 3 times or until all silver deposits are removed and the gold appears to have a matte finish If t...

Page 27: ...nnected to 5 Turn the 5000 5100 on and quickly press ESC on the computer keyboard The 5100 screen should go blank the computer screen should display Press ESC to cancel application SI Bootware 12 11 95 ver 1 007 or SI Bootware 12 11 95 ver 1 008 6 On the computer keyboard type LOAD then press ENTER The computer screen should display MFG 0089 Device 4470 Erase ROM Yes No Abort 7 On the computer key...

Page 28: ...en press ENTER on the 5000 5100 keypad to confirm You are now ready to setup the 5000 5100 with your parameters You must also calibrate set the barometer NOTE If anything goes wrong garbage all over the computer screen turn off the 5000 5100 by unplugging the power supply from the back of the instrument and start again 1 The file name will vary as future versions of the software are released Windo...

Page 29: ...e board slightly and slide the board out of the rear connector openings The seven rubber switch extenders may come loose from the board Be careful not to lose them PC BOARD RE INSTALLATION Remove the protective covering from the display DO NOT TOUCH THE FACE OF THE DISPLAY YOUR FINGERPRINTS CANNOT BE EASILY REMOVED Slip the connector end of the board into place against the gasket at the rear of th...

Page 30: ... latched output U6 with zero wait states de multiplexed and a bus width of 8 bits CS5 The CS5 chip select is used for the watchdog retrigger with zero wait states de multiplexed and a bus width of 8 bits FLASH MEMORY Models 5000 5100 have internal FLASH memory IC16 When the VPPSHDN P4 3 control line is left floating or driven high all program operations including boot and normal blocks to the chip...

Page 31: ...ft unconnected if unused The signals at P3 1 and P3 2 are sampled and reported in the status byte every 1 40th of a second If P3 2 is high a bit is set in the status register until the register is read The level on P3 1 is polled every 1 40th of a second and passed directly to a bit in the status register P3 1 will be used for the low battery signal and P3 2 for the power switch A piezo buzzer may...

Page 32: ...w current linear 5 volt supply is fed from the main through a RC filter NEGATIVE SUPPLY Negative bias voltage for the LCD display is generated by switching a p channel fet with the PWM2 output from the micro The inverting inductor diode capacitor configuration will output a negative voltage dependent on the pulse width of PWM2 6 to 10 2v Should the PWM not operate or be temporarily shut off the le...

Page 33: ...the Anode to J5 pin 2 and Cathode to J5 pin 3 The Anode is biased positive to approximately 800 millivolts from U22 by selecting the 800 mV tap on resistor divider R61 R62 R63 through switch U25 section A and B The Cathode current is integrated by U22 and C48 A D The input to the analog to digital converter is selected by the multiplexor U23 The gain applied before conversion is adjusted by select...

Page 34: ...YSI Incorporated Model 5000 5100 Service Manual 30 SECTION 13 SCHEMATIC DIAGRAMS Main CPU Representative drawing Actual circuit may vary ...

Page 35: ...YSI Incorporated Model 5000 5100 Service Manual 31 Display and Memory Representative drawing Actual circuit may vary ...

Page 36: ...YSI Incorporated Model 5000 5100 Service Manual 32 Keypad and Real Time Clock Representative drawing Actual circuit may vary ...

Page 37: ...YSI Incorporated Model 5000 5100 Service Manual 33 RS 232 and Expansion Connector Representative drawing Actual circuit may vary ...

Page 38: ...YSI Incorporated Model 5000 5100 Service Manual 34 Power Supply Representative drawing Actual circuit may vary ...

Page 39: ...YSI Incorporated Model 5000 5100 Service Manual 35 Analog Front End Representative drawing Actual circuit may vary ...

Page 40: ...YSI Incorporated Model 5000 5100 Service Manual 36 A to D and Multipluxer Representative drawing Actual circuit may vary ...

Page 41: ... BUZ1 TP52 TP53 TP54 TP55 TP56 TP57 TP58 TP60 TP61 TP62 TP63 TP64 TP69 TP70 TP71 TP72 TP73 TP74 TP75 TP76 TP77 TP79 TP80 TP81 TP82 TP83 TP84 TP85 TP86 TP87 TP89 TP90 TP91 TP67 TP66 TP65 TP78 TP68 TP88 TP108 TP109 TP128 TP121 TP47 TP122 TP124 TP123 TP118 TP103 TP114 TP115 TP101 TP100 TP102 TP117 TP126 TP116 TP236 TP234 TP235 TP224 TP223 TP222 TP221 TP220 TP233 TP232 TP219 TP228 TP227 TP229 TP230 TP...

Page 42: ...4 C19 C20 C36 C34 C35 C37 C11 C39 C42 C27 C5 C4 C30 C31 C10 C13 C22 C21 C33 C6 C17 C38 C16 C40 C2 C47 C56 C41 C52 C1 C18 J5 R50 R59 R60 R43 R40 R42 R69 R49 R70 R41 R52 R51 R14 R11 C62 R8 C9 C45 R10 C60 C61 R56 U26 J2 U15 C3 C32 C12 C43 C14 D7 D5 D4 D6 D9 R77 C51 U8 U7 R6 C7 U28 U24 Q3 R9 5 1 J4 U19 Q1 R7 U5 U11 C28 C25 C26 R1 R22 R2 C29 1 U21 S1 R71 U16 R72 C59 U6 R76 R75 R74 U1 R73 R78 U12 R80 R7...

Page 43: ...ES SMD TKF 220K 5 1 8W U17 IC 7660 VOLTAGE CONV R10 24 25 32 34 RES SMD TKF 330 5 1 8W U7 9 ICSM 4N28 200 SINGLE OPTOCOUPLER R28 29 33 36 57 RES SMD TKF 1 3K 5 1 4W BUZ1 BUZZER PIEZO CERAMIC 5800HZ R72 77 79 80 82 84 RES SMD TKF 10K 5 1 8W x1 CRYSTAL SMD 16Mhz R76 RES SMD TKF 62K 5 1 4W x2 CRYSTAL SMD 32Khz R9 RES SMD TKF 0 1 1 1 2W J3 CONN SMD HEADER 50 DOUBLE ROW R74 RES SMD TKF 40 2K 1 1 4W J6 ...

Page 44: ...0 111015 Case Assy Upper 5000 111007 Case Assy Upper 5100 111017 Case Assy Lower 5000 5100 Includes 051023 051043 Foot Rubber Self Stick 5000 5100 051034 Terminal Battery Push On 5000 5100 032061 Gasket Connector Probe Bar Code 5000 5100 032063 Gasket Connector Power Supply 5000 5100 032064 Gasket Connector RS232 5000 5100 051025 Standoff 25 Snap In 5000 5100 Retain Display 003228 Extension Switch...

Page 45: ...nal 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 written instructions or standard indu...

Page 46: ...l info ysi com SOUTH REGION C C Lynch Associates 212 E 2nd Street Suite 203 Pass Christian Mississippi 39571 Phone 800 333 2252 228 452 4612 Fax 228 452 2563 WEST REGION EnviroServices Repair 1110 Burnett 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 4...

Page 47: ...st 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 norm...

Page 48: ...___________________ 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 ...

Page 49: ...YSI Incorporated Model 5000 5100 Service Manual 45 ...

Page 50: ...Item 051042 Drawing A51042C July 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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