series - Jenway
Contents
1. European or American using the Up Down keys The Left Right arrow keys allow forward and backward movement along the row of digits Press the STO key to accept the setting 13 950 050 REV A 04 03 3 3 DO MODE This gives a direct readout of the DO of the sample under test as either oxygen saturation or air saturation If a cal value lt 25 0 is entered the resolution will automatically increase to 0 1 Oxygen Saturation this will give a reading of 20 9 in air where 20 9 is the amount of oxygen as a percentage of oxygen in air and will give a reading directly as a percentage of oxygen in the sample All measurements in this range are given to a resolution of 0 1 Air Saturation this will directly assign a percentage dissolved oxygen to air saturated water and further readings are then given as a percentage of this air saturated water sample All measurements in this range are given to a resolution of 1 DO Calibration If DO measurements are to be performed in mg l the current barometric pressure should be entered into the instrument via the Calibration Setup menu Calibration D 02 100 0 Manual Pressure bar 1 013 Manual Salinity afl 00 Setup oboe Sates Ree Calibration DO allows the setting of DO value for calibration between the limits of 0 1 to 199 9 using the Up Down arrow keys Manual Pressure bar allows the setting of the current barometric pressure between the limits of 0 1 to 6 0bar2. 3 TXD 3 TXD 4 DTR 4 DTR 5 GND 5 GND 6 DSR 6 DSR 7RTS ee 7RTS 8 CTS 8 CTS 9 9 NOTE Interface Cable Order Code 013 203 is required 30 950 050 REV A 04 03 Interfacing continued The RS232 communications parameters on the computer or printer need to be set to match those of the Model 9500 as detailed below 1200 Baud 9600 Baud 7 Data Bits 8 data bits Odd Parity OR No parity 1 Stop Bit 1 stop bit Setting of these options is detailed in Section 3 2 8 The Model 9500 supports both hardware CTS RTS flow control and software XON XOFF flow con trol Pressing the PRINT key outputs from the RS232 interface Sending an ASCII D to the 9500 causes a printout of the current displayed reading plus sample number Sending an ASCII C causes a printout of the last calibration parameters Sending an ASCII P causes a printout of the stored readings 6 3 Keypad Emulation Keypad remote control using RS232 interface 7 Instrument On Standby Escape 1 Calibrate Memory Clear 9 Print 8 Up Arrow 2 Down Arrow 4 Left Arrow 6 Right Arrow 30r5 Enter Store 31 950 050 REV A 04 03 6 4 Printing A 32 column serial printer 037 701 is available for use with the Model 9500 There are two methods of connecting the serial printer to the Model 9500 a IrDA the IrDA interface is a line of sight wireless communication protocol The IrDA sensor located on the front left hand corner
3. Fit membrane Replace membrane Fill or replace membrane Replace probe Clean the tip or replace the membrane Replace membrane Refill or replace membrane Replace membrane Replace probe Use fresh solution and re calibrate Reset salinity values Recalibrate with fresh solution Replace solution Replace standards Reset barometric pressure Line up units or alternatively use supplied RS232 connector The feed light on the printer will flash if the unit requires paper Connect ac power supply If the above does not answer your query try the FAQ section on the www Jenway com Website 33 950 050 REV A 04 03 HEALTH amp SAFETY PRODUCT Potassium Chloride Solution PHYSICAL DATA Description Colourless solution Specific Gravity 1 0 Solubility in water miscible in all proportions HEALTH HAZARD May be harmful if ingested in quantity causing nausea vomiting and diarrhoea May irritate eyes FIRST AID Eyes Irrigate thoroughly with water If discomfort persists OBTAIN MEDICAL ATTENTION Lungs Remove from exposure Skin Wash off thoroughly with soap and water Mouth Wash out mouth thoroughly with water In severe cases OBTAIN MEDICAL ATTENTION PRODUCT Sodium Sulphite Anhydrous PHYSICAL DATA Description White Powder Specific Gravity 2 63 Solubility in water very soluble HEALTH HAZARD If ingested in quantity can cause gastric irritation colic diarrhoea central nervous system de
4. e g the dissolved oxygen c1 day 0 3 was not less than or equal to dissolved oxygen C1 day 0 dissolved oxygen C2 day n This does not prevent the answer being displayed but does warrant a warning as it is a condition of the BSI standards EN 1889 1 1998 EN 1889 2 1998 The same explanation applies to the following warning message The following BOD condition was not met C1 C2 lt 2 C1 3 Press any key to continue ANON KR mg l AN The following BOD condition was not met e1 c2 lt 2 1 3 Press any key to continue Warning Messages General Messages Oxygen consumed over n days is greater than 1 5 mg l Press any key to continue Rei q Oxygen consumed over n days is greater than 1 5 mg l Press any key to continue B B S D The above warning message alerts the user to a possible contamination within the blank samples It is a condition of the BSI standard that over n days the oxygen within the blank should not exceed 1 5 mg l 22 950 050 REV A 04 03 Overwrite existing blank STO Key to continue ESC Key to cancel amp Overwrite existing sample STO Key to continue ESC Key to cancel There is a blank sample reading already stored the BOD time limit of 24 hours has not expired therefore the user can overwrite the existing blank sample measurement If 24 hours has expired the appropriate message will be shown to indicate this BOD Batch and S
5. they are unable to go back and repeat any day 0 measurement unless they delete the batch Deleting the batch erases any results stored in that batch from sample 1 to 10 When displaying the BOD answer if there is only one blank reading day 0 or day n but not both then the BOD answer is calculated without blank criteria Overwrite You can overwrite a day 0 or day n reading providing 24 hours hasn t elapsed from any initial reading in said batch If you overwrite a day n reading the BOD result is updated straight away with the new answer if there is one 20 950 050 REV A 04 03 BOD Calculation Using the two BSI Standards for BOD calculation with without blank solution EN 1889 1 1998 and EN 1889 2 1998 There are three conditions that need to be met for a successful BOD answer C1 is the dissolved oxygen of the sample on day 0 C2 is the dissolved oxygen of the sample on day n C3 is the dissolved oxygen of the blank sample on day 0 C4 is the dissolved oxygen of the blank sample on day n Ve is the volume sample within the test solution Vt is the total volume of the test solution Condition 1 with blank During the course of n days the dissolved oxygen measurement shouldn t fall by more than 1 5 mg l Condition 2 3 with out blank BOD answer is evaluated providing the following conditions are met C1 3 lt C1 C2 lt 2 C1 3 broken down into two parts C1 3 lt C1
6. Alarm High mg l Alarm Low 3 2 5 G L P Setup Exit Cal Reminder Cal Reminder Interval Cal Reminder Audible Alarm User ID Alarm Outputs Disabled Audible Alarm Warning Disabled DO2 Alarm High 199 0 DO2 Alarm Low 000 0 mg l Alarm High 19 99 mg l Alarm Low 00 00 enables the user to exit the Setup menu and return to the main set up screen can be enabled or disabled by using the Up Down keys which toggle between the two settings can be enabled or disabled by using the Up Down keys which toggle between the two settings allows the user to set the high alarm limit up to 199 0 allows the user to set the low alarm limit down to 000 0 allows the user to set the high alarm limit up to 19 99 allows the user to set the low alarm limit down to 00 00 Cal Reminder Disabled Cal Reminder Interval Hr 024 Cal Reminder Audible Alarm Disabled User ID 0000 Batch ID 000 Security Setup enables the user to exit the Setup menu and return to the main set up screen can be enabled or disabled by using the Up Down keys which toggle between the two settings can be set within the limits of 001 to 999 hours by using the Up Down keys The Left Right arrow keys allow forward and backward movement along the row of digits Press the STO key to accept the value can be enabled or disabled by using the Up Down keys which toggle between the two settings up to a 4 digit code can be set using the Up Down keys The Left Right a
7. C2 and C1 C2 lt 2 C1 3 Failure of any of these conditions doesn t prevent an answer being displayed but a warning message is displayed when viewing the results of the particular sample whose conditions failed BOD Calculation with blank BOD C1 C2 Vt Ve Vt C3 C4 Vt Ve BOD Calculation without blank BOD C1 C2 General Points Batches 1 to 20 work independently allowing up to 20 batches to be running at the same time Blank time elapsed is shown on the BOD printout When the second blank reading is stored sample ID is set to 1 and the cursor moves to the sample square When changing to a different batch number sample ID reverts back to 1 and sample type reverts back to blank The maximum number of days shown on the results screen and measuring screen after a complete BOD measurement is 99 BOD Batch is a separate set up parameter to Batch ID in G L P set up the two are treated independently of each other Cal reminders may be enabled but do not function while using the BOD mode Results can be printed from the BOD measuring screen and also the result screen 21 950 050 REV A 04 03 Warning Messages BOD Conditions not met The following BOD condition was not met C1 3 lt C1 C2 Press any key to continue CY QB m i The following bod condition 2 was not met ife1 3 lt e1 c2 Press any key to continue i The first part of the BOD condition failed
8. Optional Accessories Optional Accessories Spares Section 6 Interfacing Analogue RS232 Keypad Emulation Printing Alarm Outputs Section 7 Troubleshooting Troubleshooting Health amp Safety EC Declaration of Conformity a ae hu 2 1 2 2 2 3 2 4 2 5 5 1 5 2 6 1 6 2 6 3 6 4 6 5 7 1 950 050 REV A 04 03 Section 1 1 1 Instrument Description Model 9500 Dissolved Oxygen Meter Operating Manual Introduction The 9500 is a fully specified DO Temperature meter that includes full support for the B O D 5 day test protocol Up to 20 B O D tests each with up to 10 samples can be stored Powerful data logging capabilities are included with the ability to store up to 250 DO readings either manually at timed intervals or alarm events 1 2 Specification DO Ranges Resolution Accuracy Pressure correction Salinity correction Temperature Range Resolution Accuracy ATC Range Manual Temp Comp Range Calibration Outputs Clock GLP Display Language option Power Size Weight 0 to 199 0 to 25 0 0 to 19 99mg 1 0 1 0 01mg l 2 within 10 C of calibration temperature Manual Manual 10 to 60 C 14 to 140 F 0 1 C 1 F 0 5 C 1 F 0 to 60 C 32 to 140 F 0 to 60 C 32 to 140 F Automatic Analogue RS232 serial amp IrDA printer interface Alarm 24 hours hrs min sec or day of month month year leap year corrected European and American form
9. of data screens are available The current screen and total number of screens are shown in the bottom right hand corner of the screen 000 O 19mag l 25 0 C 03 50 40 20706703 000 0 19mgil 25 0 C 03 50 43 20706703 000 0 00mg l 25 0 C 04 15 03 23106703 000 0 00mgil 25 0 C 04 15 05 23106703 Other screens of data can be accessed using the Up Down arrow keys The CLR key will delete data according to the set mode If the PROMPT BEFORE DELETING warning is set then a second CLR is required to delete results The PRINT key will print all stored data 26 950 050 REV A 04 03 3 7 GLP Functions A variety of GLP functions are available via the GLP Setup menu Cal Reminder Disabled Cal Reminder Interval Hr 024 Cal Reminder Audible Alarm Disabled User ID 0000 Batch ID 000 Security Setup Setup A reminder that calibration is due can be set via the Cal Reminder option Once this option is set a valid calibration is required to use the 9500 after the time limit has elapsed This option is DISABLED by default The interval time is set in hours on this menu NOTE A calibration should be performed immediately after the setting of this value to reset the clock This should be done as soon as set up is complete The on screen reminder can be accompanied by an audible alarm This is set using the audible alarm setting on this menu NOTE The use of the Calibration Reminder feature will prevent the user from per
10. of the printer should be in line with the Ir window on the side of the 9500 The Ir icon on the symbol display indicates whether the units are attempting to connect single icon flashing or connected two icons b Connect serial cable supplied with the printer to the 9 way socket located on the rear panel of the instrument To intiate a print out of data press the print key When the first print is performed a header section will be printed showing Instrument name Time and Date Spacing for entry of Operator amp User ID Operator ID number Most recent calibration information This will be followed by results data dependent on mode selected Details will also be given on temperature Time and date of the stored readings will be displayed An asterisk indicates that manual temperature compensation is being used Each reading will be identified by a batch number A calibration will reset the printout and the header information will be re printed To obtain a print out of stored readings enter the RESULTS MODE and press the print key A print out of all filled memory locations will then be generated 6 5 Alarm Outputs The 9500 provides two alarm outputs These can be accessed using the two 4mm connectors on the rear of the 9500 They are open collector outputs To set the alarm limts at which these are activated please refer to section 3 2 4 To use the alarm outputs they should be ENABLED in the Alarms Setup screen see sect
11. the Up Down keys which toggle between the two settings 1 950 050 REV A 04 03 Data Log Interval Memory Full Prompt Before Deleting Clr Key 3 2 8 Printer Setup can be set between 00 00 01 and 23 59 59 gives the user to select the Stop cease storing results and not to overwrite existing stored information or Overwrite overwrite existing results options when the memory is full Selection is made via the Up Down keys which toggle between the two settings can be enabled or disabled by using the Up Down keys which toggle between the two settings toggles between Deletes Results Before Deletes All Results and Deletes Results Since Selection is made via the Up Down keys which toggle between the four settings Select the Printer Setup sub menu by highlighting the option and pressing the STO key The follow ing menu will be shown Exit Printer Interface Serial Printer Baudrate Printer Interface Serial Serial Printer Baudrate 9600 enables the user to exit the Setup menu and return to the main instrument display toggles between Infrared and Serial Selection of the preferred option can be made using the Up Down keys which toggle between the two settings toggles between 9600 and 1200 Selection of the preferred option can be made using the Up Down keys which toggle between the two settings Refer Section 6 2 12 950 050 REV A 04 03 3 2 9 Endpoint Detection Set up Exit Endpoint detection En
12. using the Up Down keys Manual Salinity g l allows the setting of salinity values between the limits of 0 0 to 75 0 Prepare a zero oxygen solution by mixing 2gms of sodium sulphite in 100mls of water Allow to stand for a few minutes prior to use To perform a calibration select the DO measurement mode Immerse the probe in the prepared zero solution and stir gently for approximately two minutes Press the CAL CLR key Once the reading has stabilised if the endpoint detection is enabled the endpoint symbol will be displayed The display will update to show 0 D 0 2 E IN Calibration 0 K 25 0 sa Cal 0 0 D02 y j 00 13 27 14 950 050 REV A 04 03 Remove the probe from the zero solution Fill a suitable container with a sample of clean water Hold the probe so that the membrane is close to but not touching the surface of the water approx 1cm above Press the CAL CLR key Once the reading has stabilised if the endpoint detection is enabled the endpoint symbol will be displayed The display will update to show meson 15 950 050 REV A 04 03 3 4 B O D Biochemical Oxygen Demand B O D Biochemical Oxygen Demand measurements are important in water treatment plants laboratories and industrial waste water facilities for water quality testing and pollution control The B O D test is a measure of the amount of oxygen that is consumed by bacteria as they decompose the organic components of waste Dissolved o
13. when selected SETUP MODE DO mg l or B O D STATUS or RESULTS If a double headed arrow symbol is present this indicates that the mode can be changed to an alternative option 7 Real time clock will display either date or time 8 The following symbols will appear along the display in DO and mg l modes Padlock Set up parameters security locked Notepad symbol data logging to internal memory IrDA status Alarm indication an Up arrow refers to Hi alarm a Down arrow refers to Low alarm 4 950 050 REV A 04 03 2 4 Keypad 2 4 1 Keypad layout 1 ESC 2 CAL CLR 3 Print key 4 Up Arrow Down Arrow Left Arrow Right Arrow STO Q used to switch the instrument on and to place into standby mode only if power supply lead remains connected to the instrument Also used to escape exit a mode used to select and perform a calibration sequence This key is also used to clear readings from Memory used to initiate a print used for adjustment during set up to scroll results and to toggle between modes used for adjustment during set up to scroll results and to toggle between modes used for adjustment during set up and to move between mode tags used for adjustment during set up and to move between mode tags used to accept an entered value in set up mode and to instigate a stored reading This key can also be used as a CAL key during calibration 5 950 050 REV A 04 03 2 5 Inputs Outputs
14. 037 901 903 311 Power Supplies 021 030 021 031 021 032 021 033 5 2 Spares 522 023 522 019 B O D Kit Zero Powder Membrane Kit amp KCI Dust Cover IrDA Serial printer supplied with roll of thermal paper serial connection lead power supply and power connection lead UK Paper Roll Serial communication software 3 2 disk Interface Cable Kit Bench stirrer battery operated Extended length electrode rod recommended for use with bench stirrer U K 230V Power Supply European 230V Power Supply U S 115V Power Supply 230V leaded Power Supply Replacement DO probe Membrane kit amp KCI 29 950 050 REV A 04 03 Section 6 Interfacing 6 1 Analogue All units are provided with 2 x 4mm sockets marked as ANALOG OUT on the rear panel An analogue output voltage of 1mV per least significant digit is available from these sockets 6 2 RS232 The Bi directional RS232 interface is available on the rear panel 9 way D type connector The connections are as follows DCD 1 LINKED TO DTR AND DSR RXD 2 INPUT TO 9500 TXD 3 OUTPUT FROM 9500 DTR 4 LINKED TO DCD AND DSR GND 5 DSR 6 LINKED TO DCD AND DTR RTS 7 OUTPUT FROM 9500 CTS 8 INPUT TO 9500 Suggested interconnections are detailed below 9500 IBM PC XT 25 way D 1 DCD DCD 8 2 RXD RXD 3 3 TXD TXD 2 4 DTR DTR 20 5 GND GND7 6 DSR DSR 6 7 RTS RTS 4 8CTS oTSS 9 9500 IBM PC XT 9 way D 1 DCD 1 DCD 2 RXD 2 RXD
15. Fig 2 5 1 Rear panel layout Alar OF ain Dissolver RS 252 Oxygen Analog OP 1 Dissolved Oxygen 7 pin DIN socket for connection of DO probe 2 Alarm Output 2 x 4mm sockets Open collector alarm outputs Red for Hi Black for Low 3 Printer Socket 9 way socket for RS232 connection 4 Power In AC 9V I P socket 2 1 x 5 5mm socket allowing the power supply to be connected to the instrument 5 Analog Out 2x4mm sockets Analogue output 6 950 050 REV A 04 03 Section 3 Operation 3 1 Good Practice Guidelines 1 Ensure the membrane is kept wet at all times When not in use the probe should be stored with the tip in a beaker of deionised water For longer periods overnight the protective sheath should be fitted with the sponge insert soaked in distilled water This will prevent the electrolyte fill solution from drying out due to loss of water through the porous membrane For extended periods store dry The probe is fitted with a temperature compensating element This is housed underneath the silver ring on the probe body Always ensure the probe is immersed in solution to a depth suitable to cover this ring Allow sufficient time for these to respond if measuring samples with varying temperatures or where sample temperature is significantly different to ambient temperature Ensure the sample is moving across the membrane at a speed greater than 15cm min to avoid oxygen starvation at the membrane If the flow r
16. Model 9500 Dissolved Oxygen Meter Operating Manual 950 050 REV A 04 03 SAFETY Please read this information carefully prior to installing or using this equipment 1 The unit described in this manual is designed to be operated only by trained personnel Any adjustments maintenance and repair must be carried out as defined in this manual by a person qualified to be aware of the hazards involved 2 Itis essential that both operating and service personnel employ a safe system of work in addition to the detailed instructions specified in this manual 3 References should always be made to the Health amp Safety data supplied with any chemicals used Generally accepted laboratory procedures for safe handling of chemicals should be employed 4 If it is suspected that safety protection has been impaired in any way the unit must be made inoperative and secured against any intended operation The fault condition should immediately be reported to the appropriate servicing authority 950 050 REV A 04 03 Model 9500 Dissolved Oxygen Meter Operating Manual Contents Section 1 Introduction Instrument Description Instrument Specification Section 2 Installation Unpacking Installation Displays Keypad Inputs Outputs Section 3 Operation Good Practice Guidelines Set Up Parameters DO Mode B O D Status Page Results Storage amp Display GLP Functions Section 4 Maintenance General Probe Care amp Maintenance Section 5
17. ample ID Value being adjusted is above upper limit This message will be shown during BOD Batch and Sample ID set up if the value selected is above the upper limit of 10 and 20 respectively 23 950 050 REV A 04 03 3 5 Status Page The Status page displays the current calibration information If no valid calibration data is stored e g after a reset or a failed calibration a warning screen will be shown The status page will show the calibration data in the order it was carried out Date time temperature and measurement 24 950 050 REV A 04 03 3 6 Results storage and display The Model 9500 has a variety of options relating to the storage of data Data Log Event Manual Data Log To Memory Data Log Interval 00 01 00 Memory Full Stop Prompt Before Deleting Disabled Clr Key Disabled Printer Setup Setup nails J States J Rem To initiate data logging the Data Log Event setting should be ENABLED By default this option is MANUAL The settings available are Manual Timed Interval Endpoint Detection Timed After Endpoint Alarm Set Alarm Clear Alarm Set amp Clear and Disabled Press the Up Down arrows to cycle through them Manual logs results on pressing the STO key Timed Interval logs on time and interval set by Data Log Interval in Hr Min Sec Endpoint Detection logs data when the endpoint is detected Timed After Endpoint logs at the Data Log Interval after the endpoint Alarm Set data
18. ate is insufficient then the sample should be stirred e g either by a gentle stirring motion with the probe or with a magnetic stirrer When using the probe in liquors sludges or polymers a coating may be deposited on the membrane causing low response or drifting This can be reduced by rinsing the probe in deionised water after each test Ensure the probe is rinsed in deionised water after each test When measuring in mg l ppm results are pressure dependent and determinations carried out atpressures other than 760mm Hg will need to be compensated When measuring in mg l ppm results obtained from saline samples will need to be adjusted for salinity Ensure the probe is polarised prior to use refer Operation It is essential to perform this procedure after replacement of the membrane or probe When replacing the membrane ensure no air bubbles are trapped in the electrolyte fill solution and that the membrane is not creased or damaged after fitting If the probe response is sluggish or the readout is unstable after membrane replacement clean the anode and cathode refer Section 4 2 Maintenance 7 950 050 REV A 04 03 3 2 Set Up Parameters The following section details the set up modes available to the user on the main set up menu screen 3 2 1 Instrument Setup This option will allow the following parameters to be set Exit allows the user to exit this menu Language enables the selection of the appropriate lang
19. ats Calibration reminder interval 1 to 999 hours Alarm outputs open collector and audible Security code protected user data Back lit 1 8 VGA monochrome LCD English French German Italian Spanish Portuguese 9V power supply 210x250x55mm 850g 1 950 050 REV A 04 03 Section 2 Installation 2 1 Unpacking Remove the Model 9500 from the packaging and ensure the following items are included Model 9500 Dissolved Oxygen Meter Dissolved Oxygen probe with ATC 522 008 3 membranes amp KCI solution 522 019 Zero salts 983 030 Adaptor bush Electrode holder Power Supply as specified at time of ordering the product Condensed operating instructions 950 051 Operating Manual 950 050 OCOANOARWNH gt The electrode stand requires minimal assembly refer to the diagram below Any shortages or damage should be reported immediately to the manufacturer or your local distributor 2 2 Installation The Model 9500 is supplied ready to use Connect the dissolved oxygen probe to the rear panel DIN socket The electrode stand requires minimal assembly refer to the diagram below Fig 2 2 1 Electrode Holder Assembly 2 950 050 REV A 04 03 Preparation for use The probe is delivered with the membrane module detached Prior to use the membrane module must be fitted to the probe body A protective cap is also supplied This should be fitted to the probe when not in use The sponge contained within the cap should
20. be wetted with deionised water prior to fitting This covers the membrane and keeps it wet thus preventing the electrolyte filling solution from drying out 1 2 Remove the protective cap from the probe Take a membrane module and hold in the vertical position Fill with the electrolyte solution 5 KCI supplied with the instrument Whilst still holding the module upright screw the probe slowly down onto the thread allowing the excess electrolyte to escape through the screw thread Ensure no air bubbles are present and that the membrane is not creased Connect the probe to the 9500 and turn on the instrument The complete probe and meter should be allowed to polarise for 30 minutes prior to calibration 3 950 050 REV A 04 03 2 3 Displays OST 29 0 ra bd 15 28 25 mails ee 1 Primary display 4 digit Provides direct readout in DO mg l or BOD of samples and standards 2 Mode annunciators shows selected measurement mode DO mg l or BOD 3 Secondary display 31 digit display Provides direct readout of automatic or manual temperature Also displays B O D set up information when working in B O D mode 4 Mode annunciators indicates temperature in C or F and whether the measurements are manually temperature compensated MAN symbol 5 Endpoint symbol this symbol is displayed when an endpoint has been detected 6 Mode tags Each mode tag is highlighted
21. dpoint Audible Alarm Endpoint Stability Sec 3 2 10 Clock Set up Endpoint Detection Enabled Endpoint Audible Alarm Disabled Endpoint Stability Sec 005 enables the user to exit the Set Up menu and return to the main instrument display can be enabled or disabled by using the Up Down keys which toggle between the two settings can be enabled or disabled by using the Up Down keys which toggle between the two settings can be set within the limits of 001 to 999 seconds Select the Clock Setup sub menu by highlighting the option and pressing the STO key The following screens will be shown Disnlay Time Display Time IN WARNING Date Format DDIMMIYVY i Adjusting time or date may delete all stored results Time 13 29 42 Date 29 05 03 Exit Display Date Format Time Date enables the user to exit the Setup menu and return to the main instrument display toggles between Time and Date Selection of the preferred option can be made using the Up Down keys which toggle between the two settings toggles between European DD MM YY and American MM DD YY formats Selection of the preferred option can be made using the Up Down keys which toggle between the two settings allows time to be set hrs min sec using the Up Down keys The Left Right arrow keys allow forward and backward movement along the row of digits Press the STO key to accept the setting allows date to be set in previously selected format
22. e BOD process begins with the preparation of the samples and blanks if required Sample volume and total volume are both required to be entered by the user for every blank sample Exit Exit Sample Volume Vejml 0050 Sample Total Volume Vt ml 0150 Total Volume t ml 0250 Total V 0250 0250 Setup Once the Blank measurement is taken the cursor will automatically move down to the sample square ready for the user to input the first sample measurement If the user wishes to repeat the blank measurement the sample type must be changed to blank in the BOD set up menu providing 24 hours has not elapsed from the previous measurement The user can continue to input samples and there respective volumes until they have finished the batch The batch does not need to consist of 10 samples the user can finish entering the day 0 samples at any time If the user forgets the blank providing 24 hours has not passed since the first sample reading on day 0 the user can select blank for sample type and continue to store the blank day 0 reading Once 24 hours has passed from the oldest day 0 reading sample blank the cursor will automatically move to the right side to continue to store day n readings After each day n reading is stored the user is given the chance to move onto the next sample number If they do not the BOD answer is shown on the measuring screen minus endpoint icon Once the user is on the right hand side of the screen
23. forming measurements with the 9500 until a valid calibration is carried out The user and batch ID can be used to identify sets of samples and a specific user This information is printed when data is output to the printer The batch number is also stored in the results memory 3 7 1 Security To control access to set up options and data manipulation functions a security code can be set using this menu When enabled a password is required to make any changes to the set up menus When the code is ENABLED a user can measure a sample log data and calibrate the unit but cannot change settings within the set up screens until a valid password is entered 27 950 050 REV A 04 03 Section 4 Maintenance 4 1 General The Model 9500 is designed to give optimum performance with minimum maintenance It is only necessary to keep the external surfaces clean and free from dust To give added protection when the unit is not in use the unit should be disconnected from the mains supply and covered with the optional dust cover 060 406 For longer term storage or re shipment it is recommended that the unit be returned to the original packing case 4 2 Probe Care and Maintenance Although the oxygen probe is supplied in a clean and tested condition it may after some time become sluggish or erratic due to contamination of the gold cathode silver anode or membrane a Membrane Replacement 1 Hold the probe in a vertical position and carefully unscrew the
24. ion 3 2 4 The alarm outputs will remain active until the alarm condition is no longer evident or the alarm limits are reset in the Alarm Set up menu For the Hi alarm output please use the Red 4mm phone connector For the Low alarm output please use the Black 4mm Phono connector For further information please contact your local distributor or the manufacturer 32 950 050 REV A 04 03 Section 7 Troubleshooting and functional checks 7 1 Troubleshooting Fault No display Erratic display Unable to calibrate to 100 Permanently reading zero Unable to calibrate Possible Cause Check power supply Check power supply Calibrating to previously set value Membrane not fitted Membrane damaged Membrane not filled with KCI Probe defective Sensor tip may be tarnished Membrane damaged Erratic slow response Air bubbles inside the Measurement errors Will not print membrane cap Coating of membrane due to use in oils or slurries strong solvents acids or alkalis Probe defective Zero solution will absorb oxygen if left open Incorrect salinity Calibration error Contaminated solution Incorrect standards Incorrect barometric pressure IrDA Connection broken Paper out Battery flat Action Check that correct 9V ac power supply is connected and switched on Unit must be used with supplied 9V acpower supply Usage of other units will cause the 9500 not to operate Manually reset value to 100
25. k readings To view a BOD answer straight away after recording a day n reading The user can choose no when prompted to increment sample number To move to the next sample for the day n reading the user can change the sample number in the set up menu Measuring Screen Incubation Days The Incubation period is only shown as 5 or 7 days depending on the time elapsed between the two readings There is a 4 hour window either side of 5 days 120 hours whereby if the time elapsed is within this window the number 5 is shown underneath BOD the same applies for 7 days respectively If the time elapsed is outside those boundaries nothing is shown below BOD In any given batch if the time period since the first reading stored is greater than 24 hours the flashing cursor will automatically move to the right highlighting the blank or sample square depending on the selection of sample type within the BOD set up screen 16 950 050 REV A 04 03 Results Screen The result screen shows all results for the current selected batch If there is no saved result or time elapsed data then is displayed in the results place Batch amp Sample ID stay the same unless the user increments the sample number when storing a result or edits the sample or batch ID within the BOD set up menu The sample and solution volume can be changed for every sample the divisible is shown on the results screen The value shown in the set up screen for the samp
26. le and solution volume is that of current reading and doesn t relate to previous values used for previous readings The exact values used for the sample and solution volume for each sample are shown on the BOD result printout Results Screen Deleting Selection within the set up menu allows the user to delete one current or all batches By deleting all this resets the sample and batch ID to 1 By choosing to delete one batch current batch ID number stays the same but the sample ID number reverts back to 1 17 950 050 REV A 04 03 BOD Set Up Parameters The following section details the set up modes available to the user on the BOD set up menu screen BOD Batch ID This option allows the user to enter a 2 digit batch ID number from 01 to 20 Enter the value using the keypad Press the STO key to accept the value Sample ID This option allows the user to enter a 2 digit sample ID number from 01 to 10 Enter the value using the keypad Press the STO key to accept the value 18 950 050 REV A 04 03 Sample Type This option toggles between Sample and Blank Cir Key This option toggles between Delete All Batches and Delete Current Batch Volumes Sample value Ve ml allows the user to set the required sample Ve Total volume Vt allows the user to set the required total volume Vt Clock Setup Refer Section 3 2 10 Set Up Parameters 19 950 050 REV A 04 03 BOD Process Th
27. logs when the alarm set point is reached Alarm Clear data logs when the alarm is cleared Alarm Set amp Clear data logs at the alarm set point and when the alarm condition clears Disabled no data logging is possible when this option is selected The 9500 can log to either the memory or the printer The memory can hold 250 data points which can be accessed via the Results screen plus 20 BOD batches 10 samples per batch When the memory is full there are two options available regarding any additional logging The default is STOP Stop when the memory is full no further data logging can occur until some locations are deleted Overwrite overwrites data from the earlier storage point To prevent the accidental erasure of data the Prompt Before Deleting option can be either Enabled or Disabled The function of the CLR key can also be set in this menu The options define the use of the delete key 25 950 050 REV A 04 03 Disabled no manual deleting of results is possible Deletes Results Before deletes all results before the selected data point Delete Results Since deletes all results since the selected data points Deletes All Results deletes all stored results 3 12 1 Accessing Stored Results To access results which have been stored use the Right arrow key to select results The most recently stored results will be displayed on the screen If more results are stored than can fit on a single screen then a series
28. membrane module 2 Take the new membrane module and holding it in a vertical position fill with O electrolyte 5 KCl 3 Still holding the module in a vertical position screw the probe slowly down onto the thread allowing excess electrolyte to escape through the screw thread Ensure no air bubbles are present and the membrane is not creased b Cathode and Anode Cleaning The gold cathode tip can be re polished using a fine abrasive crocus paper material Lay the abrasive sheet on a flat surface hold the probe in a vertical position and gently polish by moving the tip over the sheet in a circular motion A toothbrush dipped in diluted ammonia solution will remove any deposits from the silver anode Rinse with deionised water prior to re assembly If the probe is not to be used for 24 hours store with the protective sheath fitted to prevent the electrolyte from drying out due to evaporation through the membrane which is porous to water vapour as well as oxygen If the probe is disconnected from the unit or anew membrane has been fitted it will be necessary to allow the probe to polarise before stable readings can be obtained Polarisation will normally be achieved within 30 minutes 28 950 050 REV A 04 03 Section 5 Optional Accessories 5 1 Optional Accessories The following list of items are available for use with the Model 9500 552 050 983 030 522 019 060 406 037 701 037 702 050 002 037 801 Stirrers
29. pression and death due to liberation of sulphur dioxide Irritating to skin eyes and respiratory system Used in controlled quantities as a food preservative and antioxidant FIRST AID Eyes Irrigate thoroughly with water for at least 10 minutes OBTAIN MEDICAL ATTENTION Lungs Remove from exposure rest and keep warm In severe cases OBTAIN MEDICAL ATTENTION Skin Wash off thoroughly with water Remove contaminated clothing and wash before re use In severe cases OBTAIN MEDICAL ATTENTION Mouth Wash out mouth thoroughly with water and give plenty to drink In severe cases OBTAIN MEDICAL ATTENTION 34 950 050 REV A 04 03 EC Declaration of Conformity JENWAY Model 9500 Dissolved Oxygen Meter complies with the following European Standards EN 50081 1 1992 Electromagnetic compatibility Generic emission standard EN 50082 1 1992 Electromagnetic compatibility Generic immunity standard Performance crite rion B EN 61010 1 2001 Safety requirements for electrical equipment for measurement control and laboratory use Following the provision of EMC Directive 89 336 EEC and Low Voltage Directive 73 23 EEC Martyn J Fall Managing Director Jenway Gransmore Green Felsted Dunmow Essex CM6 3LB England 35 950 050 REV A 04 03
30. rrow keys allow forward and backward movement along the row of digits Press the STO key to accept the value 10 950 050 REV A 04 03 Batch ID up to a 3 digit code can be set by using the Up Down keys The Left Right arrow keys allow forward and backward movement along the row of digits Press the STO key to accept the value 3 2 6 Security Setup Select the Security Setup sub menu buy highlighting the option and pressing the STO key The following menu will be shown Data Entry Security Disabled Security Code 660 Setup moe J Status Results Exit enables the user to exit the Set Up menu and return to the previous set up screen Data Entry Security can be enabled or disabled by using the Up Down keys which toggle between the two settings Security Code up to a 3 digit code can be set by using the Up Down keys The Left Right arrow keys allow forward and backward movement along the row of digits Press the STO key to accept the value 3 2 7 Data Logging Set up Data Log Ewent Manual Data Log To Memory Data Log Interval 00 01 00 Memory Full Stop Prompt Before Deleting Disabled Cir Key Disabled Printer Setup Setup Exit enables the user to exit the Set Up menu and return to the main set up screen Data Log Event can be enabled or disabled by using the Up Down keys which toggle between the two settings Data Log To allows the data to be sent to Memory or to the external Printer Selection is made via
31. uage English French German Italian Spanish or Portuguese Use the Up Down keys to scroll through the language options LCD Brightness enter the value using the keypad Press the STO key to accept the value 8 950 050 REV A 04 03 3 2 2 Temperature Setup Select the Temperature Setup sub menu by highlighting the option and pressing the STO key The following menu will be shown Exit Temp Units c Manual Temperaturel C 025 0 Temp units allows selection of the preferred unit of measurement either C or F using the Up Down keys which toggle between the two units Manual temperature allows the manual temperature value to be set Press the STO key to accept the value 3 2 3 Calibration Set up This option allows the following parameters to be set Calibration D 02 100 0 Manual Pressure bar 1 013 Manual Salinity gfl 00 Exit enables the user to exit the Setup menu and return to the main set up screen Calibration DO allows the setting of DO value for calibration between the limits of 0 1 to 199 9 using the Up Down arrow keys Manual Pressure bar allows the setting of the current barometric pressure between the limits of 0 1 to 6 0bar using the Up Down keys Manual Salinity g l allows the setting of salinity values between the limits of 0 0 to 75 0 9 950 050 REV A 04 03 3 2 4 Alarms Setup Exit Alarm Outputs Audible Alarm Warning DO Alarm High DO Alarm Low mg l
32. xygen measurements are made at the beginning and end of a five day incubation period for the standard five day B O D test The dissolved oxygen probe membrane is not affected by intefering ions the pH of the sample sludge clays or inorganic matter This is due to the electrolytic cell being separated from the sample by a selectively permeable membrane through which only gases can pass The potential within the electrolytic cell is adjusted so that only the oxygen is reduced at the cathode giving rise to a current flow proportional to the partial pressure of oxygen in the sample B O D Measuring Screen The main BOD screen serves 2 purposes 1 to display the measuring screen and current sample number selected 2 to display the BOD answer if a measurement has been taken Note In this mode the padlock and IrDA icon are not displayed even when enabled 12 58 BatchNo 1 SampleNo 1 Blank 0 12 77 Blank nj 0 19 Sample 0 12 77 Sample nj 0 19 Day n Day 0 17 days 22 hrs lf there is a BOD answer it is displayed on the measuring screen To identify when the measuring screen is displaying a BOD answer BOD is shown under the units of measure Below the BOD caption is the incubation period in days providing the BOD conditions have been met Shown at the bottom of the results screen Day n Day 0 relates to the time elapsed for day n and day 0 of the current sample reading it does not relate to the blan
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