YSI Model 5000/5100 Dissolved Oxygen Temperature Service Manual
Contents
1. 41 SECTION 1 GENERAL DESCRIPTION MODEL 5000 FEATURES The Model 5000 is a microprocessor based menu driven dissolved oxygen meter designed to perform laboratory measurement of dissolved oxygen and Biochemical Oxygen Demand BOD The angled profile makes these instruments both functional and attractive A large graphical display provides on screen menus and large data fields for ease of operation and readability The angle and position of the keypad make operation of the 5000 comfortable The tactile and audio response from each key stroke give you the confidence that every command has been received The Model 5000 is compatible with all existing YSI dissolved oxygen probes when used with the YSI Model 5011 adapter The new YSI Model 5010 self stirring BOD Probe allows you to operate the probe from the instrument s power supply eliminating the need for a separate power cable for the probe Internal memory for storing up to 100 sets of data and an RS232 port allow you to upload data from the Model 5000 directly to your computer Or you can use your 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 SOUR2. 5150 2 N 2 t 1TPS2 TP215 E 3 vL 1 gf 1 o ca IO ile 2 EAR ED Batteries 58 1 TP 235 J1 1 D3 L 2 1 16ND 71 2 5 su A TERE uerS J1 05 a ELO 4 L 1 uan 8 ET 7 qn ii tz Jr To Ol 209 Ez ali AN INGND CER e uc in STE OTE TE sre Sem 8 8 S332 S22 78 TS 8 8 19202 L DGND L TP41 1 ie INGND 220K TP208 ua iU H e 5 SHDN CS 7 84 Ze AGNO GND EAN K MAX770 tal P206 J tur i s INGND fend INGND TP206 gt Ys 18 204 5 7 CD4011B TP208 E 5 2 GN E ix 0 i 7218 42 PGR0TP211 TP212 5 S pPouer amp e 1 252 E CD4911B WA OUT IN 330 4 012 2 5 srs I 714 COMP GND U2 E 22K TP213 ep 3 4 2 13111 GND 2048118 CD40118 5 7 02 NOM 3 INGND T gu INGND 5 TP30 1 T 220 AN 3 M TP237 TP238 C2 13 12 2 x 3 Pun I Gres tracesmest atap Ts 1 TP14 15 4 la C82 Ul ET NE su ss TP219 Paster Pr A 4 19223 ouert 4 cap SRM 19221 TF 7 056 your 5 4 x 21 LCp_B1nS a a5 AN GND 90 x d 107864 Sin 8L ala pee SR Te224 in Suv 45 DGND Pid DGND AGND AGND Note C39 and R81 not installe YSI Incorporated Model 5000 5100 Service Manual 34 Analog Front End Representative drawing
3. EF pm Y SI incorporated DESONED ONGEN METER So SS a E A27 YSI MODEL 5000 YSI MODEL 5100 Dissolved Oxygen Temperature SERVICE MANUAL TABLE OF CONTENTS Section 1 General Description 1 Section 2 Specifications eee l l i ON 2 Section 3 Software Flow Chart 4 sassa 3 Section Mini s esea aeb M 4 4 1 Display ese 4 AD Report SOUP sscsscconcesscessscssesssncsscesascooesssdetsvesesesocessscsh ssndcventssdseaceonsesdesesecssesesesseseosseaecsneees 6 SAS scsesenssdevedonsocestsess 7 4 4 O RN SET PRATER 8 S ction 5 Calibration endrerit WG Su aka FE 10 5 1 Dissolved Oxygen Calibration 10 PunEeS e M 10 DO Cal anos 11 5 2 Barometer OO 13 A RN 13 5 4 Zero C alDratiOns 14 Section 6 DIA SMOSUCS 15 OL History u qu 15 A O
4. R55 er 7 R50 926 23 B C L 7866 REA 2 1 R58 R67 R49 es 54 N C51 C42 R81 E u27 50 R70 Rea C58 C47 Z C58 1 28 R84 un R72 2 x ILI I R71 REV 38 SECTION 15 PC BOARD COMPONENTS Reference Description Reference Description Designator Designator R15 75 RES SMD TKF 1M 5 1 8W C32 43 59 62 63 SMD TANT 33uF 20V 20 RES SMD 1K 5 ICSM ADM705 MICRO SUP R1 2 5 6 11 13 RES SMD TKF 22K 5 1 8W U28 ICSM 87C750 MICRO 16 22 23 37 56 71 CONTROLLER R48 RES SMD TKF 20 5 1 8W 013 1 SP720 STATIC PROTC ARRAY R12 44 47 78 RES SMD TKF 100 5 1 8W ICSM LMC660 OP AMP R62 RES SMD TNF 4 99K 0 1 1 8W ICSM 74HC4053 TRIPLE 2CH ANA MUX RES SMD TNF 64 9K 0 196 1 8W ICSM 74HC4051 ANALOG MUX R54 55 64 65 68 RES SMD TNF 750 0 1 1 8W ICSM TC500 A D CONV R58 61 RES SMD TNF 20K 0 196 1 8W U21 1 only IC MPX100 PRESS SENSOR R40 51 52 RES SMD TNK 9 09K 0 1 1 8W ICSM LTC1384 RS232 TRANSCEIVER R8 14 31 35 RES SMD TKF 2K 1 1 8W ICSM HCPL 2730 DUAL OPTOCOUPLER R41 RES SMD TNK 590 0 1 1 8W R50 53 66 67 69 RES SMD TNF 1 5K 0 1 1 8W R30 39 49 73 85 RES SMD TNF 0 0 1 8W ICSM LM3411 SEC REG DRIVER C27 45 CAPR SMD CER 0 01uF 50V 10 ICSM MC14011 NAND R63 RES SMD TNF 100K 0 1 1 8W ICSM MAX770 SWITCHER R7 58 RES SMD TKF 220K 5 1 8W IC
5. YSI Incorporated Model 5000 5100 Service Manual 37 Representative drawing Actual layout may vary YSI Incorporated E cia Con 42 st 03 C12 e RoR L Re _ R7 R23 pog 17 lt 6830 2055 uj R2 R24 u2 R ca L 04 A Y Has o gt gt um C27 ug C24 Ez 05 DA E Di PORE C61 27 E ca unt mE R2 Cen 4 Uo CO CH 02 3 R77 e C16 1 ue L 50 49 e E iv L oot 2 cn R2 31 100 R4 R73 ut a I c2 co RA L us R75 E R78 L 1 2 1 E E J3 RIB 7 2 c20 E R14 R15 gt C23 m Uta R16 5100 ASSY 051020 DWG D51020 1 REV YSI C29 C34 C35 C36 R32 MS R33 R34 R35 R36 015 C32 D7 C28 R37 R38 uta RN1 uta C88 5000 ASSY ITEM 050100 DWG D51020 2 Model 5000 5100 Service Manual e 5 6782 45 R44 R47 R4 S 2 L Raa Reo d gt de C57 E R51 nas e e R52 za 1199 R61 R83 E U25 Ri ap R64 R40 R41 R2
6. RE 2 2Nxx 22k TN T B1 4 Ut Ri RET ucc RIS WP AIS ure E FuPP 4 FUPP A14 R14 GND2 23 813 RIS END pz 22 RESET gt 22 A12 PUD MN A12 All n2 2 ZR BEL RIB Dis BL D18 d ma pla 22 Dis 00 DGND ag 42 ng 2 ales AZ 011 22 D11 DGRD AG ge Dig 2 De 186 D9 _ as be L6 p su pz 80 02 82 A Ar pe D4 p4 Ber 0 B1 p3 9 BYTE 1 0 JB 43 HS BD a 2 pe PR28F288 gt MUX A 19 MUX_B ails 1 GAIN_A 5 UG EU Q5 15 GRIN C G3 8 HOLD TRRCK ga 2x 2 DISP1 3 utc uss m 4 Cp pres 4 Ug 10 DGND 20 5U i re 74HC374N co 2 LR m CE 2 RESET C52 T 15 08 151 01 14 22 iuF it 3 05 16 pe b 6 14 DE NC ss 18 Dp NC pa Je 15 RD gt SU 19 29 6 16 D GC a N Model 5000 5100 Service Manual Keypad and Real Time Clock Representative drawing Actual circuit may vary Su A Su A A m K2 tx DIREN ll LINZ AS
7. Swing the case open slowly pivoting NN ps the three rear snaps C until they release Gently lay the lower case assembly to the m side being careful not to put strain on the battery wires A PC BOARD REMOVAL Gently release the two snaps nearest the front curved edge of the unit Release the two side snaps nearest the front then the other two side snaps With the snaps released lift the front of the 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 the case then rotate the board down into position engaging each snap as you go Be sure that the switch extenders go through the holes in the case as they should Inspect the assembly to insure that all board snaps are fully engaged and the board is in the proper position in the case Turn the assembly over and activate each switch Be sure you can hear and feel each switch click as it is pressed CASE RE ASSEMBLY Plug the connector from the battery holder in the lower case assembly into the mating connector on the PC board Hook the three snaps at the rear of the case into place and rotate the low
8. COL3 KEY INT COLA BUZ xLO BRT COLI COL2 RON3 SCLK SCLKIN SDIN AUX_CLK Model 5000 5100 Service Manual 32 RS 232 and Expansion Connector Representative drawing Actual circuit may vary TP228 5150 P229 232 ula su cit vec HZ re Pow p P C2 Td C3 2 c2 y 1 1 1 ole ole M e me ge R11 C a Ses PS 85 TRZIN T20UT mS a x B R20UT R2lN 43 R10UT RIIN H i ON OFF GND H 1 LTC1384 4 9238 TP231 12832 d i TP23 DIB 2 GND TX ON t t 22 1 29 4 aa P BED 234 4 E E 1 TP25 Bxp g 3 27 FCPL 2738 TEES L 341 TP26 SAO 1580 225 HCPL 2730 i 1836 2 2 j 3 5150 P Z E DGND z 2 o IGND cz z 1326 Ole CD i i33 2 Ce 50 7061 3 qe 4 2 PoverS g vec i YSI Incorporated Model 5000 5100 Service Manual 33 Power Supply Representative drawing Actual circuit may vary
9. 16 6 3 Reset A 16 Section 7 Troubleshooting Charrt 17 Section S Test Procedire erret attore ua eoa pea eo doi cateo 19 Section 9 MIInf nan 2000020 21 91 5000 and 5100 Instruments 21 Batteries 21 9 2 5910 and 5905 Dissolved Oxygen Probces 22 NEAR 22 Section 10 Software Upgrade Procedure 23 Section 11 Disassembly Assembly Procedures 25 Section 12 Circuit DescriptiOM 26 Section 13 Schematic Diasgram s 30 Section 14 PC Board 37 Section 15 PC Board Components 39 Section 16 Accessories and Replacement Parts 40 Section 17 Warranty and Repair
10. Use the DIGIT soft key to select the digit you wish to change by pressing UP or DOWN When you have finished setting the parameters press ENTER to confirm The STABLE sub menu can be left without making any changes by pressing the MODE key instead of ENTER Operation returns to the setup menu If you wish to disable the autostable feature set the DO variation to 0 0 To return to Main mode press MODE two more times YSI Incorporated Model 5000 5100 Service Manual 4 4 SYSTEM SETUP From the Setup menu press the SYSTEM soft key to display the following menu AUDIO off TIME DATE VERSION RS232 The AUDIO on off soft key allows setting the beeper on or off The key toggles between an AUDIO off soft key and an AUDIO soft key The present state of the beeper would be the OPPOSITE of the function shown on the soft key If the beeper is currently on the soft key shows AUDIO off i e your alternate choice The TIME DATE soft key brings up the following menu to allow setting of the date and time Flashing Digit Time Date 09 58 04 01 20 96 Use the UP DOWN DIGIT and NEXT soft keys to enter the time in 24 hour format The display 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 para
11. remove it D e Remove the old batteries and Install fresh alkaline batteries NOTE Always observe the correct polarity when installing the batteries e Replace the battery cover by sliding it to the left to lock in place li il Bottom of Instrument YSI Incorporated Model 5000 5100 Service Manual 21 9 2 5910 AND 5905 DISSOLVED OXYG EN PROBES Probes that have been exposed to hydrogen sulfide or sulfur dioxide for extended periods may cease operating in a normal mode Output current will decrease and may become unstable Visual symptoms include blackening of the silver anode and or discoloration of the gold cathode ELEC TRO DE CLEANING 5900 series probes should be cleaned only when erratic readings occur or after about every 500 hours of use two months Each cleaning removes material and reduces the life of the probe so excessive cleaning should be avoided GOLD CATHODE For correct probe operation the gold cathode 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 the cathode remains tarnished return the probe
12. 0 1 3 97 0 02 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 soft keys as necessary until the display reads 10 0 ppt The Mg L display should read 10 58 02 Mg L B Set the salinity value to 35 0 The display should read 9 02 02 Mg L C Press the MODE key to leave CALIBRATION mode without saving the changes 5 Polarizing Voltage Check A Set test box to position F 1 B Connect a millivolt meter to the test box red and black binding posts Same as J5 Pins 2 amp 3 The reading should be 800 mv 5 YSI Incorporated Model 5000 5100 Service Manual 20 SECTIONS MAINTENANCE 9 1 5000 AND 5100 INSTRUMENTS Model 5000 series instruments are designed to provide years of trouble free service The only routine maintenance will be replacement of the batteries BATTERIES Low batteries are indicated in the display by LOW BATT as shown here Main LOW BATT Low battery warning QQAM 11 33 STORE REVIEW SEND CALIBRATE When the indicator appears replace the batteries with 4 fresh alkaline C size batteries as soon as possible LJ E e Turn off the instrument N N e Turn the instrument over and set Jj N J it on a padded surface Slide the bcd i battery cover to the right as i f n jj indicated on the cover and
13. 16423 Test Box From the Main mode press the CALIBRATE soft key to enter Calibration mode The bottom row of the display shows the soft key menu 98 0 96 8 15 ma Calibrate 0 0 P 740 709 s AM 24 38 G 11 33 5 1 DISSOLVED OXYGEN CALIBRATION Dissolved oxygen calibration can be done automatically with the push of one button see AUTO CAL or manually by entering the desired value in milligrams per liter or percent saturation see DO CAL BEFORE YOU CALIBRATE you must Setup the meter as discussed in the Setup section of this manual and Prepare the DO probe Before performing an AUTO CAL you must check the barometric pressure reading and calibrate the barometer if necessary as shown 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 calibration For air calibration place the probe in air at 100 relative humidity To achieve this the probe can be placed in a BOD bottle containing 1 of water No stirring is required in air AUTO CAL 1 Prepare the probe according to the instructions in the Probe Operations Manual 2 Connect the probe to the meter 3 Place the probe in a
14. Actual circuit may vary RUEE lt AGND 5 025 ANOD 2 1662602 3 TP302 gm W U22 9 Fr x J JA 29 12 Hn 14 golf ER ser 80 2 ees Ped 3 ay lt 12 AG Al T 8 GND iE DERD 122 15 THERM I 307 AGND POLCAP 22uF s O STIR P C48 wee lt iN 4 nl Sb s pig 3 CATHODE INGND 100 128 8 022 18 402274 ue N AGND 3 RGND 11 CT A RUEE lt lt A AGND TEA ANODE _ 1 lt 962 AUGE eI gt 64 9k 0 1 RUCC 4 01 gt o R52 13 THERM I THERM_1 25 m 4 An e 9 B9k_0 1 P U22 gt DO_CHG 12 1 02274 R51 gt 11 9 B9k_0 14 lt Er GND AGND 3 A 15329 27 BRRO4 BRRO o 3 2 3 2 3 YSI Incorporated Model 5000 5100 Service Manual 35 A to D and Multipluxer Representative drawing Actual circuit may vary A RUEE lt lt c S REFH REFL 2K_0 1 RGND e TP332 RUCC gt RUEE 5 S TLC2274 U23 73AVEE 8 AGND AGND HOLD TRACK MUX C MUX B MUX_A GAIN_C GRIN_B GAIN_A YSI Incorporated Model 5000 5100 Service Manual 36 SECTI
15. BOD bottle containing about 1 of water to provide a 100 relative humidity environment 4 Press D to turn the instrument on 5 Allow the probe to polarize and the temperature to stabilize for at least 15 minutes If calibration is performed prematurely the values will drift and may be out of specification 6 Press the CALIBRATE soft key to change to Calibration mode The following display will appear YSI Incorporated Model 5000 5100 Service Manual 10 98 0 8 15 9 Calibrate 0 0 740 9 24 38 G 11 33 7 Model 5100 Verify that the barometer reading is correct Calibrate the barometer 1f necessary as shown under Calibration Barometer Model 5000 Enter the current barometric pressure as shown under Calibration Barometer 8 Verify that the salinity is set to the correct value 0 0 ppt for air calibration See Calibration Salinity Make sure that the display readings are stable then press the AUTO CAL soft key to calibrate Dissolved Oxygen The message D O CALIBRATION SAVED will be displayed for a few seconds 98 0 8 15 9 Calibrate 0 0 740 740 24 38 C 11 33 D O CALIBRATION SAVED Message 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
16. These application features simplify compliance with USEPA 503 regulations for vector attraction and provide useful tools for plant operation decisions For laboratories with larger volumes the Model 5100 offers bar code scanner and BOD Analyst software capability These tools greatly reduce the labor required for processing BODs and calculating BOD values The RS232 serial port makes it easy to capture data electronically The model 5000 and 5100 software can be upgraded easily using your computer When YSI upgrades these instruments you ll be able to get a floppy disk from YSI and simply upgrade the software in a few minutes Calibration of the Model 5100 has been greatly simplified when compared to other dissolved oxygen instruments With it s internal barometer the Model 5100 is able to automatically compensate for changes in barometric pressure so there is no need for charts altitude information or external barometric pressure information YSI Incorporated Model 5000 5100 Service Manual 1 SECTION 2 SPECIHCATIONS OXYGEN MEASUREMENT Ranges mg L 0 0 to 60 0 mg L air saturation 0 0 to 600 0 air saturation mbar 0 0 to 1500 Accuracy mg L 0 1 plus 1 Least Significant Digit LSD air saturation 0 1 plus 1 LSD mbar 1 plus 1 LSD Resolution mg L 0 1 or 0 01 mg L whichever is greater air saturation 0 1 air saturation mbar 1 mbar TEMPERATURE MEASUREMENT Range 5 0 to 50 0 Accuracy 0 1 C Resolut
17. be performed to compensate for the specific background current of the probe in use To calibrate to a true zero place the probe in a zero oxygen environment and adjust the calibration value to zero A standard method for creating such an environment is to dissolve in water excess sodium sulfite Na2803 and a trace of cobalt chloride CoCl These chemicals will remove all oxygen from the sample See Standard Methods for the Examination of Water amp Wastewater method 4500 O G 19th edition Alternatively 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 96 8 15 Calibration 0 0 PP 740 9 24 38 11 33 3 Press DO CAL soft key to enter the manual DO calibration menu 000 0 0 00 9 0 0 PP 740 mHo 24 380 11387 4 Make sure that the display readings are stable then use the UP DOWN and DIGIT soft keys to enter the calibration value of 0 096 or 0 00 mg L NOTE The instrument will not except any value other than zero for the first point of a two point calibration 5 Press ENTER to confirm your calibration The screen will momentarily display D O Calibration saved 6 You must now recalibrate in an oxygen environment see Auto Cal or DO Cal NOTE Whe
18. for service 5900 Series Sensor _ Anode Silver SILVER ANODE It is normal for a dark layer of silver chloride to cover the silver anode After prolonged use it may become necessary to clean the anode Soak the probe in a 14 ammonium hydroxide solution for 2 to 3 minutes or overnight in a 3 ammonium hydroxide solution Rinse with deionized water recharge with electrolyte and install a new membrane YSI Incorporated Model 5000 5100 Service Manual 22 SECTION 10 SOFTWARE UPGRADE PROCEDURE The YSI model 5000 5100 software can be upgraded using a computer with a serial port All that 1s needed is any standard communications software and a straight RS232 serial cable not a null modem cable The 5000 5100 has a female DB 9 connector A 9 to 25 pin adapter will also be needed if the computer has a 25 pin serial port The instructions are as follows 1 Connect the 5000 5100 to your computer serial port using a straight RS232 cable 2 Insert the software update disk into the appropriate drive usually A or B making note of the FILENAME of the update file from either the diskette label or accompanying documentation Start your communications program such as ProComm or Windows terminal 4 Setyour communications parameters in the communications software on the computer to the following Baud Rate 9600 Data Length 8 bits Parity None Stop Bits 1 NOTE Make sure the COM port matches the one that the 5000 5100
19. is connected 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 g 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 the computer keyboard type Y Do NOT press ENTER After 2 or 3 seconds the computer screen should display Load File 8 Enter your communications program command to Upload File such as the PageUp key in ProComm or Send text file in Windows terminal If you are prompted for a protocol select 9 When prompted for the file name enter the FILENAME provided with the upgrade diskette as A FILENAME HEX FILENAME HEX depending on the drive you placed the diskette in Letters numbers hex should count up on the computer screen and it may display SENDING M5X00A1 HEX If FILENAME was M5X00A for example After the file is finished a few minutes the computer will beep and the sign will appear on the screen again 10 On the computer keyboard type GO then press ENTER The computer screen will display RUN The 5000 5100 should turn on YSI Incorporated Model 5000 5100 Service Manual 23 11 After the 5000 5100 comes on you must
20. 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 The present real time DO probe current in microamps The offset of the barometer in millibars Press MODE to return to the Diagnosis menu Press MODE two more times to return to the Main menu 6 3 RESETPS The RESET Ps soft key Reset Parameters is used to reset all instrument parameters to the factory default values This 1s useful when the parameters have been changed or corrupted such as when new software is loaded Press the RESET Ps soft key to display the following Press ENTER to RESET Parameters HISTORY SENSOR HELP RESET Ps Press ENTER to confirm If you do NOT wish to reset the parameters press MODE to return to the Diagnosis menu YSI Incorporated Model 5000 5100 Service Manual 16 SECTION 7 TROUBLESHOOTING CHART Error Messages The instrument performs a Power On Self Test each time it is turned on The following error codes are provided to facilitate troubleshooting Blank Display Dead low batteries or Replace batteries test defective external power power supply supply 5011 adapter improperly Unplug 5011 from power connected supply connector Internal power supply Verify circuit operation using failure DVM Replace PCB El Check Probe Temperature under Con
21. reset the parameters to the factory default values a Press the CALIBRATE soft key on the 5000 5100 keypad b Then press the DIAGNOSIS soft key on the 5000 5100 keypad Then the RESET Ps soft key on the 5000 5100 keypad d Then 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 The file name will vary as future versions of the software are released Windows is a registered trademark of Microsoft Corporation ProComm is a registered trademark of Datastorm Technologies Inc YSI Incorporated Model 5000 5100 Service Manual 24 SECTION 11 DISASSEMBLY ASSEMBLY PROCEDURES Place the instrument face down on a padded surface for all procedures below CASE DISASSEMBLY While applying slight separation force to the front curved edge of the case near one corner use a small straight blade screwdriver to release the snap A on the N3dO same side When that snap releases keep applying b the separation force and use the screwdriver to release the front snap B nearest the same corner Repeat the procedure on the other corner to release both front and both side snaps fi A
22. 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 normal precautions to prevent radioactive contamination and must use appropriate decontamination procedures should exposure occur 3 If exposure has occurred the customer must certify that decontamination has been accomplished and that no radioactivity 1s detectable by survey equipment 4 Any product being returned to the YSI Repair Center should be packed securely to prevent damage 5 Cleaning must be completed and certified on any product before returning it to YSI PACKING INSTRUCTIONS 1 Clean and decontaminate items to insure the safety of the handler 2 Complete and include the Cleaning Certificate 3 Place the product in a plastic bag to keep out dirt and packing material 4 Usea large carton preferably the original and surround the product completely with packing material 5 Insure for the replacement value of the product YSI Incorporated Model 5000 5100 Service Manual 43 Cleaning Certificate Organization Department Address City Zip Country _ Model No of Device_______ Lot Number Contaminant 1f known Cleaning Agent s used _____ Radioactive Decontamination Certified Answer only if there has been radioactive exposure Yes Cleaning Certified By Name YSI Incorporated Model 5000 5100 Service M
23. 00 550 5875 e Fax 510 674 8655 CENTRAL REGION HydroTech Services LLC e 4910 Iris Street Wheat Ridge COe 80033 e Phone 877 467 0800 e Fax 303 467 0742 e E Mail 100735 423 compuserve com YSI Incorporated Model 5000 5100 Service Manual 42 CLEANING INSTRUCTIONS NOTE Before they can be serviced equipment exposed to biological radioactive or toxic materials must be cleaned and disinfected Biological contamination is presumed for any instrument probe or other device that has been used with body fluids or tissues or with waste water Radioactive contamination is presumed for any instrument probe or other device that has been used near any radioactive source If an instrument probe or other part is returned or presented for service without a Cleaning Certificate and 1f in our opinion it represents a potential biological or radioactive hazard our service personnel reserve the right to withhold service until appropriate cleaning decontamination and certification has been completed 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 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
24. 005 ODIA URH UALE RD EPORT3 A19 EPORT2 A18 EPORTL A17 XTRL2 02 4 0 1 4 1 PHH27P4 2 n EPORTA A1s _ 916 P4 3 50 0 CS1H7P3 1 CS2 P3 2 S3HU P3 3 CS4H7P3 4 5 5 EXTINT2 P3 6 EXT INTS7P EXTINTBZP2 2 BREQ P2 3 1 2 4 HOLD P2 5 ILDA P2 6 CLKOUT P2 7 Model 5000 5100 Service Manual 30 Display and Memory Representative drawing Actual circuit may vary N 054 1 hn 3 WR 2 01 YSI Incorporated we i Ez TP126 S lt DDN O LDAOAN gt 202560 D FLRSH MEMORY 54 1007 19 DS 016 R37 A38 813 Ilais 1 06 Ll 5 PA28F20012M 22K 81278 512 1 05 1 D4 22K A11 2116 D3 PRZSFSGOIBID 0 81137 11 104 i pg 21 12 1 03 13 D1 016 8824 AS 1 02 12 De REF DES 5U 120 25 88 1 01 qi x y R22 x ES 86 x 5 n5 ULL x oa c C25 x as C26 x n2 7 2 a2 OE C28 x m 5191 E C298 x 2 ae ucc 25 020 y DERD a 3 2
25. 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 be connected to U19 pin 6 driven by port pin A buzz of variable length can then be initiated by a command from the master The bar code wand or PC AT style keyboard connects to P1 6 and P1 7 The clock line on P1 6 so on interrupt is generated for each data bit P1 4 is an interrupt output Any time status changes keys are pressed or a bar code character comes in P1 4 is brought low It is held low until the status register is read P1 5 an external interrupt is used for the master serial line and PO 1 for the data The chip is selected by brining P0 0 high See below for interface and timing details RS232 PORT The port is driven by U18 LTC1384 which implements TXD RXD DSR and DTR The logic signals are isolated by opto couplers U14 and U15 The five volt supply is also isolated by YSI Incorporated Model 5000 5100 Service Manual 27 transformer Voltage regulation on the isolated supply SISO will range from 5 1 to 5 5 volts DISPLAY INTERFACE The display module is connected directly to the microprocessors bus A chip select line CS3 is used to select the dis
26. 5000 5100 Includes 051023 051043 Foot Rubber Self Stick 5000 5100 051029 Operations Manual 5000 5100 052021 Cable Assy RS232 5000 5100 YSI Model 5011 Probe adapter converts from probe 5000 5100 MS connector to meter DIN INSTRUMENTS 96L DATE CODE OR EARLIER CONTACT YSI TECHNICAL SUPPORT YSI Incorporated Model 5000 5100 Service Manual 40 SECTION 17 WARRANTY AND REPAIR YSI Model 5000 and 5100 are warranted for two years from date of purchase by the end user against defects in materials and workmanship YSI Model 5000 and 5100 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 To exercise this warranty write or call your local YSI representative or contact YSI Customer Service in Yellow Springs Ohio Send the product and proof of purchase transportation prepaid to the Authorized Service Center selected by YSI Repair or replacement will be made and the product returned transportation prepaid Repaired or replaced products are warranted 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 1 failure to install operate or use the pr
27. 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 RES SMD TKF 10K 5 1 8W CRYSTAL SMD 16Mhz R76 RES SMD TKF 62K 5 1 4W CRYSTAL SMD 32Khz RES SMD TKF 0 1 1 1 2W CONN SMD HEADER 50 DOUBLE ROW RES SMD TKF 40 2K 1 1 4W CONN SOCKET STRIP 20 PIN RES NET SMD 22K CONN MINI DIN 6 PIN C1 2 4 7 10 11 13 CAPR SMD CER 0 1uF 50V 10 CONN MINI DIN 8 PIN 16 22 24 30 31 33 38 40 42 44 46 47 49 50 52 54 58 60 45 61 d 9 NI a C23 CAPR SMD TANT 1uF 16V 20 CONN HEADER RT ANGLE 3 PIN C48 CAPR SMD FLIM 0 22uF 63V 10 TRSTR SMD N MOSFET S19410 CAPR SMD POLY 0 47uF 63V TRSTR SMD P FET TP0610 20 2 12 14 15 CAPR SMD TANT 33uF 16V 20 S2 3 5 7 10 SWITCH SMT MIN TACT SINGLE POLE NO D1 3 7 9 DIODE SMD SCHOTKY SWITCH POWER DIODE SMD ZENER 5 1V INDUCTOR SMD 100uH ICSM S80C196NP MICRO INDUCTOR SMD 50uH ICSM 62258BL 32K BYTE SRAM BATTERY 30 LITH PC MOUT 80ns ICSM PA28F400B 4MEG FLASH ICSM 74HC32 OR GATE ROM ISCM 74HC04 HEX INVERTER R42 43 70 RES SMD TNF 2 0K 0 1 1 8W ICSM 74HC374 OCTAL D LATCH RES SMD TKF 4 99K 1 1 8w YSI Incorporated Model 5000 5100 Service Manual 39 c o N SECTION 16 ACCESSORIES AND REPLACEMENT PARTS IT Model Comment 111017 Case Assy Lower
28. Connect the probe to the meter 3 Place the probe in a known oxygen environment such as a BOD bottle containing about 1 of water to provide a 100 relative humidity environment or a Winkler titrated sample 4 Press to turn the instrument on 5 Allow the probe to polarize and the temperature to stabilize for at least 15 minutes If calibration is performed prematurely the values will drift and may be out of specification 6 Press the CALIBRATE soft key to change to Calibration mode The following screen will be displayed YSI Incorporated Model 5000 5100 Service Manual 11 8 15 ig Calibrate 0 0 PP 740 9 24 38 C 11 33 autocar JL JL seur PIAGNOSTICS 7 Press the DO CAL soft key to enter the manual DO calibration menu Flashing digit 98 0 8 15 9 0 0 PP 740 mo 24 38 C 1133 DOWN DIGIT NEXT 8 Verify that the salinity is set to the salinity value of the calibration environment 0 0 ppt for air calibration See Calibration Salinity Make sure that the display readings are stable then enter the calibration value 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 aw Flashing digit 98 0 96 08 15 9 Cal mg L 0 0 740 24 38 11 33 9 Press ENTER to confirm your calibr
29. E SSP ISE 4 04 118 la Ta Ta 1 a ATC INT i CC 0 Lithium Bat ig 9X U4 I AS 31189 x1 21157 x2 15 Bl ba NC 11 1 0 1H2 fe CLK UBATO 0 se 2 NC UBATB 5 K GND GND e 09 052424 DOND Su A SDAT sy UE RM A sP720 1618 5 lt a A u Sox us 96 vs nO SES E ERE N 2 o oc 4557911731415 2 E DEND u28 24 UCC P3 o 21 su ES P3 6 A RESET 9 Dos RESET 3 agt 4 Keypad P3 4 ni 19 ROW 1881 1 2 5242 TS AUX_CLK 11 2 22159 153 60 454 xi Pate 2443 273 273 253 amp ROS 8 a APT PL NV 59 sra 58 1157 6 HS 2 i 27392753 2753 42753 Pa 2 8 pig L18 2606 1 ee 4 x x ui P SEL 0 1 id maa 1 44 124 P0 0 P1 3 e qiu siz 513 isi oh 12 17 270 253 2752 g2 he 12 9112 ROLI4 1881 4 21055 P1 8 4 E 4 p F Far P87C750EBQ y 51 sic 17 sig A 2539253 20033 garza LN N1 C4 RONS 1881 6 UD lt TP132 16 2 10819 528 182 1 522 DOND COL3 d T e x x KEY INT COL2 AA COLI 4 2 VVVT R78 100 SH LO_BAT su su y _6Pin mDin _ SDIN i 2 HC32 alu xg oa 0 019 EUM T8 gt 4 L Nola BUZ1 4164 SEND 9445 D8ND SCLKIN X2 5 YSI Incorporated 870758 Programming Connections
30. ON 14 PC BOARD LAYOUT Representative drawing Actual layout may vary TP39 wre TP300 Tp230 TP231 TP233 TP228 TP229 TP202 2 1 P307 TP227 TP109 TP306 TP232 TP234 TP304 TP301 TP302 TP29 TP214 TP307 TP209 TP201 TP334 TP205 TP208 TP305 TU ren 729 TP206 TP322 TP319 24 Teseo TP27 TP318 TP236 TP325 225 TP321 TP22 20 19 TP215 J6 TP323 TP333 Trato TP223 Tree Trazo TP327 eis TP235 TP326 TP328 ree Trato TP221 TP238 TP218 TPUS est 116 Tran TP310 TP308 TPS09 TP222 TP23 TP330 TP3 TPi30 TP32 TP4s bs TP68 TP50 TP53 TP52 TP42 TP7S TP34 TP77 T4 19 sit S15 TP85 TP86 s5 57 59 TP79 TP36 TPe9 Pao PvP TP20 TP28 Pas bist Te T1 kas kaa Tese TPss LN mo S20 113 TP78 TP56 TP63 TP219 S12 712100 PD4 TP132 TP203 TP33 TP35 TP106 176 PD1 112 TP123 62 TP72 TP60 TP81 g TP83 101 Treo Ten TE TPU6 621 S17 s2 st3 54 S6 PD S8 S10 TP105 TP93 TP220 TPGS TP104 TP66 TP128 P Pos s22 514 518
31. anual YSI Incorporated Model 5000 5100 Service Manual 45 YSI incorporated 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 infoO ysi com Item 051042 Drawing A51042C July 1998
32. ation The screen will momentarily display D O CALIBRATION SAVED as shown below 98 0 8 15 m9 Calibration 0 0 PF 740 mes 24 38 11 33 D O CALIBRATION SAVED Message DOWN DIGIT NEXT Press MODE to return to the Main mode The instrument is now calibrated and ready to measure dissolved oxygen and temperature YSI Incorporated Model 5000 5100 Service Manual 12 5 2 BAROMETER The YSI Model 5100 has an internal barometer for pressure compensation during AUTO Dissolved Oxygen Calibration This barometer only needs to be calibrated when it is no longer reading the correct barometric pressure If the 5100 is kept at a constant ambient temperature 10 C the barometer calibration should be accurate for about 30 days The Model 5000 does not contain a barometer therefore the current barometric pressure must be entered before an AUTO Cal is performed The reading currently displayed is the value that was entered and stored during the previous calibration From the calibration menu press the DO CAL soft key then press the NEXT soft key until the barometric pressure is flashing and Barometer appears in the top right corner of the display as follows Flashing digit 98 0 Barometer 0 0 PP 740 99 24 38 C 11 999 Press ENTER to SAVE SETTING DOWN DIGIT NEXT Using the UP DOWN and DIGIT soft keys enter the true local barometric pressure This corresponds to a reading from a mercury baromet
33. ecord from 00 to 99 DOWN DIGIT NEXT This menu allows specifying a specific range of memory locations for the report The default range is 00 99 and empty locations will not be sent to a computer or serial printer Flashing Cursor The display digit that has the flashing cursor below it 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 The DIGIT soft key makes it easy to make large changes by selecting the digit you wish to change Press the NEXT soft key to change between the minimum and maximum parameter When the desired number is obtained pressing ENTER will accept the number and exit the RANGE sub menu To return to Main mode press MODE three more times YSI Incorporated Model 5000 5100 Service Manual 6 4 3 AUTOSIABLE SETUP The autostable feature indicates when readings are stable by emitting a single beep and displaying an asterisk to the right of the dissolved oxygen reading The instrument uses criteria that you input to determine what a stable reading is You select the maximum percent of change that may occur during a selected time duration The instrument will display an asterisk only when these criteria are met Stable reading indication This menu is used to change the autostable criteria Press the NEXT soft key to select between the time duration and the percent variation
34. ective assy cable or plug 21 25 Probe malfunction Replace defective assy YSI Incorporated Model 5000 5100 Service Manual 18 SECTION 8 TEST PROCEDURE This produce 1 for use with the YSI 16423 Oxygen Test Box If no test box 15 available testing can be performed by inputting the resistance values in column 2 of the charts below e display test and system check are automatically run upon instrument start up e Allow the display to stabilize completely during the following calibration checks e Last digit rounding feature should be left off e If auto stable feature has been activated an asterisk should appear one the LCD once the reading is stable Note Neither the Model 5100 nor the 5000 have internal calibration adjustments If either fail any of the following accuracy checks they must be repaired before using 1 Temperature Range Check A Plugthe test box connector into a 5011 Adapter and then into either the 5000 or 5100 IBT Instrument Being 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 amp 5 Display Reading 9534 0 25 5 0 0 2 4482 Q 0 25 10 0 0 2 C 2252 0 25 25 0 0 2 984 Q 0 25 45 0 0 2 2 Oxygen Range Check Range A Set test box to D 2 position let the readings stabilize and set the IBT to the CALIBRATE DO CAL mode The display should ha
35. er 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 measuring and the meter will automatically compensate for the effect of salinity on dissolved oxygen The default setting for salinity is 0 0 ppt You can enter any value between 0 0 and 40 0 ppt From the Calibration menu press the DO CAL soft key then press the NEXT soft key until the salinity value is flashing The top right corner of the screen will display Salinity as shown in the following screen Remember if you are manually calibrating in mg L in water saturated air salinity is 0 0 ppt Flashing digit Salinity 740 mg 11 35 M Press ENTER to SAVE SETTING DOWN DIGIT NEXT Using the UP DOWN and DIGIT soft keys enter the salinity value Press ENTER to confirm The message SALINITY SETTING SAVED will be displayed YSI Incorporated Model 5000 5100 Service Manual 13 5 4 ZERO CALIBRATION All oxygen probes have a small background current even in the absence of oxygen The Model 5000 5100 s default zero value is based on the average probe s background current This default value may cause errors when measuring low concentrations of oxygen For highest accuracy measurements a zero calibration should
36. er case into place on the upper case Make sure all four snaps are fully engaged Press firmly down on the three rear snaps to make sure they are completely engaged YSI Incorporated Model 5000 5100 Service Manual 25 SECTION 12 CIRCUIT DESC RIPTION CPU RESET Reset to the CPU U5 is supplied by a number of sources The reset generator circuit monitors the 5 supply line and pulls reset low when the voltage is out of limits This function is provided by 91 a 705 The CPU itself will pull the RESET pin low upon execution of a RST instruction The RST opcode is FFh thus execution of an erased section of ROM will cause a reset R3 s value has been established so that the MAX705 can pull the RESET line low While on the other hand RESET can go low while the MAX705 s output is high The reset signal is available at the expansion connector The signal is bi directional at this point If the line is held high the reset pulse from the reset generator can be overridden Similarly pulling this pin low will cause a reset CHIP SELECTS CSO The CSO chip select is active for the CCB fetches This is used for the boot block chip select and program FLASH U16 for no wait states de multiplexed with a bus width of 16 bits CS1 The CS1 chip select is used for off board RAM U20 with no wait states de multiplexed and a bus width of 8 bits CS2 The CS2 chip select is reserved for expansion CS3 The CS3 chip select is used f
37. ge from the calibration point in mbar DO Two electrode polarographic DO sensors are with 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 selection of the feedback tap on the resistor string R53 54 R64 68 and R79 Dual slope integration conversions are performed with U27 under timing control of U5 YSI Incorporated Model 5000 5100 Service Manual 29 SECTION 13 SCHEMATIC DIAGRAMS Main CPU Representative drawing Actual circuit may vary s M 19117 Lo SAN i oO 4 E FUPP 5 e c a 10 2 CUPPSHDN air CN 1 8 Pup Oe 114 U Ut 373 34 93 Max705 2 707 22K 8 TP180 amp CSS 5 5 BA P105 SU zo 1 tT 4 X1 2 R76 E m Pa UBAT Y 552 il e 16Mhz BENB HC32 RUx CLK PES 3 HON 019 s c X TESSI 187 o TXD 46 1085 RXD 47 DSR 5 s 48 1 49 8 1HZ 52 118 74HCO4 PULSE SS 51 DO_PL 52 CLKDU 54 DOCHG_EN Fn BERB YSI Incorporated 0
38. ily shut off the leading RC will guarantee that the fet does not remain on and drawing excessive current In a fault condition the RC will cause the FET to switch off in a maximum of 18 3us causing a peak current of 300mA Max The p FET is rated for 100mA continuous and 400mA pulsed The negative linear supply is generated by U17 and its associated capacitors ANALOG TEMPERATURE The resistor divider network R59 R60 output voltage ranges from 0 0615 volts at 50 C to 0 453 volts at 5 C 72275 gain stage is set for 8 Gain error is calibrated out of the temperature measurement by performing a gain 8 reading on a precision fixed voltage divider R40 and R41 The actual gain result close to 8 is stored for use in calculating probe temperature Output from the amplifier ranges from 0 493 to 3 627 volts PRESSURE SENSOR The pressure sensor produces a differential voltage on two output pins A D conversions must be done on the high channel 4 and low channel 3 outputs the ultimate result being the difference in the two conversions adjusted to gain 1 of AVCC from BARO to BARO The user is expected to provide a calibration point close to typical operating temperatures YSI Incorporated Model 5000 5100 Service Manual 28 To calculate the current pressure calculate the difference between the cal point and the current reading Divide the difference by 1 11E 5 assuming a 4v A D reading 65800 counts and the result is the pressure chan
39. ion 0 01 C BAROMETRIC PRESSURE MEASUREMENT Range 450 to 825 mmHg 600 to 1100 mbar Accuracy 1 plus 1 LSD within 10 C ambient temperature from calibration point Resolution 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 COMPENSATION Range 0 0 to 40 0 ppt Accuracy 02 mg L OPERATING ENVIRONMENT 0 to 45 C 10 to 90 relative humidity non condensing WATER RESISTANCE The Model 5000 and 5100 are designed exclusively for indoor use and are NOT waterproof POWER The Model 5000 amp 5100 are powered by an AC adapter or 4 C size alkaline batteries A new set of alkaline batteries will power the selected instrument for approximately 30 hours not including stirring YSI Incorporated Model 5000 5100 Service Manual 2 SECTION 3 SOFTWARE HOW CHART The following section shows the software flow chart for the 5000 5100 The two operating modes Main and Application are shown at the top with the soft key functions that are accessed in each mode below them Functions in shaded boxes are only available on the model 5100 MAIN
40. lt gt APPLICATION Store Reveiw m m Recall mal gt Print All gt Clear Delete All v Y Send L CALIBRATE gt gt Cal m DO Cai m gt SETUP i Print LM Display size tren nut gt unt m gt Contrast LM Last Digit gt Skip m Report gt Up m gt SDF hp Down gt CDF L Confirm gt Range Next Stable a System gt Audio On Of m gt Time Date Version RS 232 DIAGNOSIS YSI Incorporated Model 5000 5100 Service Manual SECTION 4 SETUP From Main mode press the CALIBRATE soft key to enter the calibration menu Notice that the dark bar in the top right corner of the display shows the current mode 98 0 8 15 9 Calibrate 0 0 PP 740 9 24 38 G 11 33 Next press the SETUP soft key to enter the Setup menu The bottom row of the display will show the following soft key setup selections DISPLAY REPORT STABLE SYSTEM These four selec
41. meter minutes Repeat the process for the remaining parameters When you have finished entering the time and date press ENTER to confirm and return to the system setup menu The message TIME SETTING SAVED will be displayed on the message line at the bottom of the screen The Time Date sub menu can be left without making any changes by pressing the MODE key instead of ENTER 8 38 1 24 38 TIME SETTING SAVED Message AUDIO off TIME DATE VERSION RS232 The VERSION soft key displays the software version of the instrument on the message line of the display just above the soft key descriptions The RS232 soft key displays the RS232 setup YSI Incorporated Model 5000 5100 Service Manual 8 2 BAUD RATE 19200 0 4 4800 1 5 2400 2 19200 6 1200 3 9600 Select the baud rate by pressing the UP or DOWN 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 YSI Incorporated Model 5000 5100 Service Manual SECTON 5 CALIBRATION The instructions below explain how to calibrate the system before dissolved oxygen measurements are taken or testing is performed using the
42. n the data line Data from peripheral to master is latched on the negative edge of the clock In this fashion data is passed both directions with no unused clock pulses while data direction changes Data is always passed in 8 bit groups LSB first there is no YSI Incorporated Model 5000 5100 Service Manual 26 start or stop bit When the master has finish communication the chip select is brought LOW ending the transfer CLOCK Master DATA Pin C X Slave Read Command and Return REAL TIME 024 The real time clock shares the serial bus with other peripherals it is device 2 uses serial cs2 The RTC chip select line is inverted to make it compatible with the bus The RTC includes a 256 bit scratch pad ram and a 4096 bit SRAM all of which are powered from an on board lithium cell B1 for non volatile operation 87C 750 PERIPHERAL HARDWARE The 87C750 scans the keypad monitors the power switch and low battery signal monitors the bar code wand and drives the buzzer The peripheral communicates events to the master though a serial bus A maximum of 20 keys can be scanned in a matrix Five normally high row inputs must be connected to port pins P3 3 P3 4 P3 5 P3 6 and P3 7 If a row is not used it will still be scanned so must be left unconnected or tied high Four column drive lines connect to P1 0 P1 1 P1 2 and P1 3 Columns are pulled low when scanned and should are left unconnected if unused The signals at P3
43. n you change the zero calibration point you offset the other value so that after zeroing the probe for zero oxygen you must recalibrate in an oxygen environment YSI Incorporated Model 5000 5100 Service Manual 14 SECTION 6 DIAGNOSTICS 5000 and 5100s have a diagnostic mode that can be used for troubleshooting In Diagnosis mode you can view specific sensor information such as DO probe current DO background current and pressure sensor offset This data is useful when trying to isolate problems or prevent error messages from occurring From the Main mode press the CALIBRATE soft key to enter Calibration mode then press the Diagnosis soft key to enter Diagnosis mode The following screen will be displayed Diagnosis HISTORY SENSOR HELP RESET Ps 6 1 HISTORY Press the HISTORY soft key to display the following information uA Diagnosis 5 98 7 90 6 42 7 47 6 43 HISTORY SENSOR HELP RESET Ps The History screen displays information about the last five DO calibrations This information 1 useful for tracking the performance of the DO probe membrane The following parameters are displayed Date Time DO uA YSI Incorporated The date the calibration was performed The time the calibration was performed The dissolved oxygen calibration current in microamps The calibration current 100 saturation at sea level of an ideal probe using a 1 mil standard membrane is 13 7uA 20 C If the p
44. nector improperly Check probe connection range installed Intermittent connection in Repair or replace cable or plug Probe thermistor defective Replace probe sensor assy Should measure 22520 25 Temperature over Electrical leakage in Repair or replace range connector or cable Probe thermistor defective Repair probe sensor assy Should measure 22520 25 C Check High Background Insufficient warm up time See Calibration procedure Nene current DO Incorrect probe zeroing See Zero Calibration procedure Probe needs servicing See probe maintenance instructions Probemalfunction malfunction Repair or replace or replace a Check Low current electrolyte or p new membrane and Membrane fouled membrane Contaminated electrodes See probe maintenance instructions Membrane too thick too thick Try another membrane another membrane resistance in probe Repair or connection YSI Incorporated Model 5000 5100 Service Manual 17 F4 Check DO High Current Membrane too thin Install new membrane and Membrane KCI Electrodes need resurfacing See probe maintenance instructions Short circuit in probe cable or Replace defective assembly connector 5 Check DO unstable Membrane damaged Replace membrane and KCl Membrane Probe electrodes needs See probe maintenance servicing instructions Connector improperly Check probe connection installed Intermittent connection in Replace def
45. oduct 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 the product v use by you of defective or improper components or parts in servicing or repairing the product or vi modification of the product in any way not expressly authorized by YSI THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE YSI s LIABILITY UNDER THIS WARRANTY IS LIMITED TO REPAIR OR REPLACEMENT OF THE PRODUCT AND THIS SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY FOR ANY DEFECTIVE PRODUCT COVERED BY THIS WARRANTY IN NO EVENT SHALL YSI BE LIABLE FOR ANY SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY DEFECTIVE PRODUCT COVERED BY THIS WARRANTY YSI Incorporated Model 5000 5100 Service Manual 41 AUTHORIZED U S SERVICE CENTERS NORTH AND EASTREGION YSI Incorporated e Repair Center e 1725 Brannum Lane Yellow Springs Ohio 45387 e Phone 800 765 4974 e 937 767 7241 E Mail info ysi com SO UTH REGION Lynch amp Associates e 212 E 2nd Street e Suite 203 e Pass Christian Mississippi e 39571 e Phone 800 333 2252 e 228 452 4612 e Fax 228 452 2563 WESTREGION EnviroServices amp Repair e 1110 Burnett Avenue Suite D e Concord CA 94520 e Phone 8
46. or the display interface with three wait states de multiplexed and a bus width of 8 bits CS4 The CS4 chip select is used for latched output U6 with zero wait states de multiplexed and a bus width of 8 bits CS5 55 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 are disabled Pulling the VPPSHDN control line low will enable program operations to all sections of the chip except the boot block Either Q1 or U11 and its associated capacitors will be included to supply the Vpp programming supply voltage that is necessary for the type of FLASH populating each board SERIAL BUS The Serial bus consists of a unidirectional clock line bi directional data line and unidirectional chip select lines for each peripheral A transfer is initiated when the 196 pulls one chip select HIGH The selected peripheral will then clock data in on the rising edge of the clock data is valid through the falling edge After a command to read data from a peripheral the data line will change direction The 196 changes its data line to a high impedance input before the next positive clock edge following a read command The peripheral waits until after the positive clock edge before driving data o
47. play and address line AO selects command or data transfers The font select pin is driven by micro output pin P4 1 The LC Display drive voltage is generated from a pulse width modulated output of the CPU As the contrast is adjusted in software the duty cycle changes are used to control the DC current in transformer T3 See the power supply section POWER SUPPLY POWER CONTROL Power on is initiated by pressing the momentary power button This pulls pin 13 of U2 low and causes pin 11 to go hi With both pins 8 and 9 of U2 hi pin 10 will go low and bring the SMPS controller U3 out of shutdown so the switcher begins to operate and latches pin 11 hi so power stays on after the switch is released Any time the power button is pressed an opto coupler is energized that pulls a dedicated line on the keyboard I O chip low and causes an interrupt The main micro U5 can then turn power off by pulling the WDFO low through optocoupler U8 SUPPLY GENERATION The switching power supply circuit generates the main 5 volt supply and an auxiliary isolated 5 volt supply The low 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 temporar
48. robe current 100 saturation 20 C 1 mil membrane is greater than 17 0uA or lower than 8 0uA the membrane probe may need service See Troubleshooting Error Codes E3 and E4 The slope of the dissolved oxygen probe in percent per microamp corrected to 20 C The slope of an ideal probe using a 1 mil membrane is 7 3 luA 20 C If the probe slope 1 mil membrane is greater than 12 6 uA or lower than 5 9 uA the membrane probe may need service See Troubleshooting Error Codes E3 and E4 The temperature at the time of calibration in C Model 5000 5100 Service Manual 15 6 2 SENSOR Press the SENSOR soft key to display the following sensor diagnostics screen System Parameters Sensor Cal Temperature 22 85 C Probe Slope 6 43 0 20 Probe Offset 0 075 uA Probe Current 16 91 uA Pressure Offset 830 mbar Cal Temperature Probe Slope Probe Offset Probe Current Pressure Offset The temperature at the time of the last calibration in C The slope of the dissolved oxygen probe in percent per microamp corrected to 20 C The slope of an ideal probe using 1 mil membrane is 7 3 uA E 20 C If the probe slope 1 mil membrane is greater than 12 6 uA or lower than 5 9 uA the membrane probe may need service See Troubleshooting Error Codes and 4 The zero offset current background current of the DO probe in microamps The factory default value is 0 075 uA This value will
49. tions are used to change the instrument setup 4 1 DISPLAY SETUP Press the DISPLAY soft key to show the following menu Display AM 11 33 SIZE UNITS CONTRAST LAST DIG The SIZE soft key cycles among the two possible display arrangements for Main mode One selection shows as many parameters as possible the other shows Dissolved Oxygen in large type with temperature and time in small type YSI Incorporated Model 5000 5100 Service Manual 4 98 0 8 15 9 Display 0 0 PP 740 DIES 24 38 11 33 The UNITS soft key changes the display unit s of Dissolved Oxygen When you have selected a large size display the DO number cycles among the three possibilities percent milligrams per liter and millibars Display AM 11 33 SIZE UNITS CONTRAST LAST DIG If the small size display has been selected the dual DO display cycles among the three possibilities percent and milligrams per liter milligrams per and millibars or percent and millibars An example is shown below 8 71 9 208 9 Display 0 0 Prt 740 meo 24 38 C 11 33 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 The LAST DIG soft key allows the user to suppress the last digit of the DO reading SIZE UNITS CONTRAST LAST DIG Press the MODE key to return to the Setup menu If you wish
50. to return to Main mode press MODE two more times YSI Incorporated Model 5000 5100 Service Manual 5 42 REPORT SETUP From the Setup menu press REPORT to display the following soft keys SDF Space Delimited Format SAMPLE ID DATE 00 TIME DO mg L BAROMETER TEMPERATURE SALINITY PRINT Record from 0 to 99 RANGE NEXT The display lists the parameters that can be included in the output string at the RS232 serial port the default set has everything selected for inclusion You can select the report format that you wish to use by pressing the SDF or CDF soft key Select SDF for Space Delimited Format standard text If you are going to import the data to a spreadsheet select CDF for Comma Delimited Format The asterisk character in front of each parameter indicates that the parameter will be included in the report Press the NEXT soft key to select the parameter that you want to change Then press ENTER to turn the asterisk character on or off NOTE After pressing SDF or 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 SAMPLE ID DATE 00 TIME DO mg L BAROMETER TEMPERATURE SALINITY PRINT R
51. ve the last digit of the number flashing B Press the UP DOWN and DIGIT soft keys as necessary for the display to read zero 0 0 then press the ENTER key to store the settings C The message line on the display should briefly say DO CALIBRATION SAVED and the DO indicated as 0 0 and 0 00 Mg L with temperature still 10 0 C See above chart D Set test box to A 2 and allow display to stabilize Press the DO CAL soft key to enter DO CAL mode again Press the UP DOWN and DIGIT soft keys as necessary for the display to read 100 0 Press the ENTER key again to store settings E Perform the following checks for 02 YSI Incorporated Model 5000 5100 Service Manual 19 Set Test Box to Resistor input J5 Pins 2 amp 3 Display Reading A2 88 2k 0 1 100 0 0 1 111 42k 0 1 79 1 0 2 2 2 3 Oxygen Range Check Mg L Range Salinity set at 0 0 A Set test box to A 2 position allow the display to stabilize set the IBT to the CALIBRATE DO CAL mode again Temperature still at 10 B Press the NEXT soft key once The display should have the last digit of the mg L number flashing Press the UP DOWN and DIGIT soft keys as necessary for the display to read 11 28 Mg L Press the ENTER key to store the value D Perform the following checks for Mg L 05 Set Test Box to Resistor input J5 Pins 2 amp 3 Display Reading 88 2k Q 0 1 11 28 0 02 Mg L 111 42k Q 0 1 8 92 0 02 Mg L 250 0k
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