series - Jenway
Contents
1. 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 4520 TXD 3 OUTPUT FROM 4520 DTR 4 LINKED TO DCD AND DSR GND 5 DSR 6 LINKED TO DCD AND DTR RTS 7 OUTPUT FROM 4520 CTS 8 INPUT TO 4520 Suggested interconnections are detailed below 4520 IBM PC XT 25 way D 1 DCD DCD 8 2 RXD RXD 3 3 TXD TXD 2 4 DTR DTR 20 5 GND GND 7 6 DSR DSR 6 7 RTS RTS 4 8 CTS _ CQTS5 9 4520 IBM PC XT 9 way D 1 DCD 1 DCD 2 RXD 2 RXD 3 TXD 3 TXD 4 DTR 4 DTR 5 GND 5 GND 6 DSR 6 DSR 7 RTS 7 RTS BCTS acts 9 9 NOTE Inerface Cable Order Code 013 203 is required 21 452 050 REV A 03 03 Interfacing continued The RS232 communications parameters on the computer or printer need to be set to match those of the Model 4510 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 6 6 The Model 4520 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 D2. C 1 F 0 5 C 1 F 0 to 100 32 to 212 F 0 to 100 C 32 to 212 F Analogue 1mV per 0 01pH RS232 serial and IrDA printer interface Alarm open collector 24 hours hrs min sec or day of month month year leap year corrected European and American formats Calibration reminder interval 1 999 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 34 digit LCD 9V power supply 210x250x55mm 850g 1 452 050 REV A 03 03 Section 2 Installation 2 1 Unpacking Remove the Model 4520 from the packaging and ensure the following items are included Model 4520 Conductivity TDSMeter Glass bodied conductivity cell with ATC K 1 027 013 Electrode holder Power Supply as specified at time of ordering the product Condensed operating instructions 452 051 Operating Manual 452 050 DAMRON 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 4520 is supplied ready to use Connect the conductivity cell to the rear panel DIN socket The electrode stand requires minimal assembly refer to the diagram below Fig 2 2 1 Electrode Holder Assembly 2 452 050 REV A 03 03 2 3 Displays 1 Primary display 4 7 digit Provides direct readou
3. to the 4520 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 3or5 Enter Store 22 452 050 REV A 03 03 6 4 Printing A 32 column serial printer 037 701 is available for use with the Model 4520 There are two methods of connecting the serial printer to the Model 4520 a IrDA the IrDA interface is a line of sight wireless communication protocol The IrDA sensor located on the front left hand corner of the printer should be in line with the Ir window on the side of the 3520 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 Most recent calibration information Cell constant Reference temperature Temperature coefficient TDS EC Ratio This will be
4. up to scroll results and to toggle between Conductivity uS or mS and TDS mg l or g l modes used for adjustment during set up to scroll results and to toggle between Conductivity uS or mS and TDS mg l or g l 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 452 050 REV A 03 03 2 5 Inputs Outputs 2 5 1 Rear panel layout 1 Conductivity Socket 7 pin DIN socket which allows the conductivity cell to be connected 2 Alarm Out 2 x 4mm sockets Open collector alarm output 3 Output Socket 9 way connection for RS232 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 2 x 4mm sockets Analogue output buffered electrode potential 5 452 050 REV A 03 03 Section 3 3 1 Operation Good Practice Guidelines For greatest accuracy ensure no particulate matter is suspended in the solution under test If necessary filter or allow the particles to settle prior to use Do not allow the cell to come into contact with any sediment which may be present Ensure no air bubbles are trapped in the cell area between the plates Ensure the cell plates are completely immersed in the solution under test Thoroughly rinse the cell pla
5. ECONDS Select the Clock Setup sub menu buy highlighting the option and pressing the STO key The following screens will be shown Disnlaw YN WARNING Adjusting time or dste may delete all stored results Time Display Time Date Format DD MM Y Y Time 10 4 4 51 Date 08 01 00 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 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 13 452 050 REV A 03 03 3 3 Preparation of Conductivity Standards Suitable conductivity standards are available commercially or these can be made up as required from A R grade reagents with reference to relevant physical tables Method for general purpose Conductivity Standard Accurately weigh
6. Model 4520 Conductivity TDS Meter Operating Manual 452 050 REV A 03 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 and 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 452 050 REV A 03 03 Contents Section 1 Section 2 Section 3 Section 4 Section 5 Section 6 Section 7 Model 4520 Conductivity TDS Meter Operating Manual Introduction Instrument Description Instrument Specification Installation Unpacking Installation Displays Controls Inputs Outputs Operation Good Practice Guidelines Set Up Parameters Preparation of Conductivity Standards Calibration with Known Cell Constant Calibration w
7. a the Cal Reminder option Once this option is set a valid calibration is required to use the 4520 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 performing measurements with the 4520 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 13 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 19 452 050 REV A 03 03 Section 4 Maintenance 4 1 General The Model 4520 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 add
8. ction 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 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 4520 can log to either the memory or the printer The memory can hold 500 data points which can be accessed via the Results screen 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 17 452 050 REV A 03 03 Disabled no manual deleting of results is possible Deletes Results Before deletes all results before the selected data point De
9. ed 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 All conductivity cells should be thoroughly rinsed after use and stored in deionised water Do not attempt to clean the surface of the plates as this could result in damage to the black platinised surface Section 5 Optional Accessories 5 1 Optional Accessories 060 406 Dust cover 037 701 IrDA printer supplied with roll of thermal paper serial connection lead power supply power connection lead UK and pouch 037 801 Interface cable kit 050 002 Serial communication software 3 disk Conductivity Cells 027 013 Conductivity Cell K 1 027 113 Conductivity Cell K 0 1 027 114 Conductivity Cell K 1 plastic covered NOTE The cells listed below are glass free and epoxy bodied 027 211 Conductivity Cell with ATC K 0 1 027 212 Conductivity Cell with ATC K 1 027 213 Conductivity Cell with ATC K 10 Calibration Standards 025 138 1413uS Standard 500ml 025 156 12 88mS Standard 500ml 025 164 84uS Standard 500ml 025 139 10uS Standard 500ml 025 165 1382ppm TDS Standard 500ml 037 702 Paper roll thermal 021 030 UK 230V power supply 021 031 European 230V power supply 021 032 US 115V power supply 021 033 230V leaded power supply 20 452 050 REV A 03 03 Section 6
10. followed by results data in either Conductivity or TDS 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 tte RESULTS MODE and press the print key A print out of all filled memory locations will then be generated 6 5 Alarm Outputs The 4520 provides two alarm outputs These can be accessed using the two 4mm connectors on the rear of the 4520 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 section 3 2 4 They will operate in both pH measurement and absolute millivolts 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 23 452 050 REV A 03 03 Section 7 7 1Troubleshooting Fault No display Erratic display Unstable display Display permanently under o
11. gnetic 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 25 452 050 REV A 03 03
12. ith Standard Solution Sample Measurement Maintenance General Optional Accessories Optional Accessories Interfacing Analogue RS232 Keypad Emulation Printing Alarm Outputs Troubleshooting Troubleshooting EC Declaration of Conformity 2 1 2 3 2 4 2 5 3 1 3 2 3 3 3 4 3 5 3 6 4 1 5 1 452 050 REV A 03 03 Section 1 1 1 Instrument Description Introduction A fully specified laboratory Conductivity Resistivity TDS Salinity Temperature meter that includes full support for good laboratory practices GLP The meter supports 1 2 or 3 point conductivity calibration Powerful data logging capabilities are included with the ability to store up to 500 readings either manually at timed intervals or alarmed events 1 2 Instrument Specifications Conductivity Ranges Resolution Accuracy TDS Ranges Resolution Accuracy Temperature Range Resolution Accuracy ATC Range Manual Temp Comp Range Outputs Clock GLP Display Languages Display Power Size Weight 0 to 19 99uS 0 to 199 9uS 0 to 1999uS 0 to 19 99mS 0 to 199 9mS 0 to 1999mS 0 to 19 99S 0 01uS 0 1uS 108 0 01mS 0 1mS 1mS 0 01S only with cell constant gt 5 0 5 2 digits 0 to 19 99mg I 0 to 199 9mg l 0 to 1999mg l 0 to 19 99g l 0 to 199 99 1 0 to 1999g 1 0 01mgl 0 1mg l 1mg l 0 019 0 1g9 19g only with cell constant gt 5 0 5 2 digits 10 to 105 C 14 to 221 F 0 1
13. larm limit up to 000 000 allows the user to set the high alarm limit up to 1999 999 allows the user to set the low alarm limit down to 000 000 allows the user to set the high alarm limit up to 20 00 allows the user to set the low alarm limit 00 01 10 452 050 REV A 03 03 3 2 6 G L P Setup Cal Reminder Disabled Gal Reminder Interwal Hr 024 Gal Reminder Audible Alarm Disabled User ID 0000 Batch ID 000 Security Sctup Exit Cal Reminder Cal Reminder Interval Cal Reminder Audible Alarm User ID Batch ID 3 2 7 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 arrow keys allow forward and backward movement along the row of digits Press the STO key to accept the value 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 Select the Security Setup sub menu buy highlighting the option a
14. led or disabled by using the Up Down keys which toggle between the two settings Clr Key toggles between Deletes Results Before Deletes All Results and Deletes Results Since Selection is made via the Up Down keys which toggle between the two settings 3 2 9 Printer Setup Select the Printer Setup sub menu buy highlighting the option and pressing the STO key The following menu will be shown Exit Printer Interface serial Serial Printer Baudrate 9600 Exit enables the user to exit the Setup menu and return to the main instrument display Printer Interface toggles between Infrared and Serial Selection of the preferred option can be made using the Up Down keys which toggle between the two settings Serial Printer Baudrate toggles between 9600 and 1200 Selection of the preferred option can be made using the Up Down keys which toggle between the two settings 12 452 050 REV A 03 03 3 2 10 Endpoint Detection Set up Exit Endpoint detection Endpoint Audible Alarm Endpoint Stability Sec 3 2 11 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 S
15. lete Results Since deletes all results since the selected data points Deletes All Results deletes all stored results 3 8 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 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 84 4pS 25 0 C 11 18 41 25 04 03 000 1 pS 25 0 C11 19 51 25 04 03 000 2 03mS 25 0 C 11 23 32 25 04 03 000 2 03mS 25 0 C 11 29 50 25 04 03 000 1446pS 25 0 C 11 29 52 25 04 03 000 82 8pS 25 0 C 11 29 56 25 04 03 000 44 0pS 25 0 C 11 29 59 25 04 03 000 8 13pS 25 0 C11 30 05 25 04 03 000 4 48pS 25 0 C 11 30 07 25 04 03 000 3 08pS 25 0 C 11 30 10 25 04 03 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 Other screens of data can be accessed using the Up Down arrow keys 18 452 050 REV A 03 03 3 9 GLP Functions A variety of GLP functions are available via the GLP Setup menu Cal Reminder Disabled Cal Reminder Interval Hr 024 Gal Reminder Audible Alarm Disabled User ID 0000 Batch ID 000 Security Setup A reminder that calibration is due can be set vi
16. ll through the language options LCD Brightness enter the value using the keypad Press the STO key to accept the value 7 452 050 REV A 03 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 Temp units Manual temperature Temp Units G Manual Temperaturel C 025 0 allows selection of the preferred unit of measurement either C or F using the Up Down keys which toggle between the two units 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 Exit Cell Constant K EC Ratio Temp Coefficient Gell Gonstant K 01 112 EC Ratio 0 60 Temp Coefficient 1 91 Reference Temp 2520 Ultra Pure Temp Correction Disabled Calibration Buffer Setup enables the user to exit the Setup menu and return to the main set up screen allows setting of the cell constant 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 allows setting of the TDS EC ratio between the values of 0 50 and 0 80 default value of 0 60 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 allows set of the tempe
17. lue to be set 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 allows Cal 3 manual buffer value to be set 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 9 452 050 REV A 03 03 3 2 4 Alarms Setup Exit Alarm Outputs Audible Alarm Warning Alarm Outputs Disabled Audible Alarm Warning Enabled Alarm Point Settings enables the user to exit the Setup menu and return to the 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 3 2 5 Alarm Point Settings Select the Calibration Buffer Setup sub menu by highlighting the option and pressing the STO key The following menu will be shown Exit Cond Alarm High mS Cond Alarm Low mS TDS Alarm High g l TDS Alarm Low g l Resistivity Alarm High Resistivity Alarm Low Cond Alarm HighimS 0009 999 Cond Alarm Low mS 0001 000 TDS Alarm High g l 1999 999 TDS Alarm Lom gil 0000 000 Resistivity Alarm HighiM 9 20 00 Resistivity Alarm Low MQ 00 01 enables the user to exit the Setup menu and return to the main set up screen allows the user to set the high alarm limit up to 1999 999 allows the user to set the high a
18. n the next sample On completion of sample measurement the cell should be thoroughly rinsed in deionised water Storage Short Term the cell should be immersed in deionised water to keep the plates wetted Long Term the cell should be thoroughly rinsed in deionised water the exterior body wiped and then stored dry NOTE When preparing the cell for storage the plate area MUST NOT be wiped dry When using a dry cell initial stability on re use may be impaired until the cell plates become re wetted To obtain optimum performance refer to Section 3 1 Good Practice Guidelines 15 452 050 REV A 03 03 3 7 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 the warning screen will be shown The status page will show the calibration data in the order it was carried out Date time temperature and Conductivity TDS readings will be displayed for each standard 16 452 050 REV A 03 03 3 8 Results storage and display Data Log Ewent Manual Data Log To Memory Data Log Interval 00 01 00 Memory Full Stop Prompt Before Deleting Enabled Clr Key Deletes All Results Printer Setup The Model 4520 has a variety of options relating to the storage of data 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 Dete
19. nd pressing the STO key The following menu will be shown Exit menu Data Entry Security Security Code Data Entry Security Disabled Security Code 660 enables the user to exit the Set Up menu and return to the previous can be enabled or disabled by using the Up Down keys which toggle between the two settings 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 11 452 050 REV A 03 03 3 2 8 Data Logging Set up Data Log Event Manual Data Log To Memor y Data Log Interval 00 01 00 Memory Full Stop Prompt Before Deleting Enabled Clr Key Deletes All Results Printer 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 the Up Down keys which toggle between the two settings Data Log Interval can be set between 00 00 01 and 23 59 59 Memory Full 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 Prompt Before Deleting can be enab
20. other than 2 C is required refer Special Calibration General Calibration 1 2 3 Immerse the conductivity cell into the prepared standard Select the MODE menu using the keypad Press the CAL CLR key The unit will calibrate to the nearest standard 14 452 050 REV A 03 03 3 6 Sample Measurement General Conductivity is a temperature dependent measurement All substances have a conductivity coefficient which varies from 1 per C to 3 per C for most commonly occurring substances The automatic temperature compensation on the 4520 defaults to 1 91 per C this being adequate for most routine determinations Conductivity readings varying with temperature may be due to the substances under test having a coefficient other than the typical value of 1 91 per C To eliminate this variation it is necessary to maintain all samples at the reference temperature by use of a thermostatic water bath or equivalent Adjustment may be made by entering the SETUP menu and selecting COEFF refer Section 3 2 2 The reading can then be adjusted to the required value 0 00 to 4 00 by using the keypad Sample Measurement After calibration the measurement of samples is carried out by immersing the cell in the samples allowing the readout to stabilise and recording the result The cell should be rinsed in deionised water between each sample to avoid contamination shaken to remove internal droplets and the outside wiped prior to immersion i
21. out 0 746 grammes of dried A R grade Potassium Chloride KCI and dissolve in 1 litre of good quality water This produces a 0 01N solution with a conductivity of 1413uS at 25 C Storage This solution must be stored in a plastic container and the air space above the solution should be kept to an absolute minimum The shelf life of 1 week can be increased by storing below 4 C but where any doubt exists about the viability of stored solution a fresh batch should be prepared 3 4 Calibration with Known Cell Constant 1 2 3 Connect a standard pre calibrated cell to the unit Select SETUP mode on the display using the Left arrow key Set the cell constant value as indicated on the body of the conductivity cell refer Section 3 2 1 The standard X1 0 cell has a cell constant range from 0 8 to 1 20 and is generally calibrated to 2 decimal places The display should be set to indicate this figure exactly The X10 cell has a cell constant range from 8 0 to 12 0 and is generally calibrated to 2 decimal places The display should be set to indicate this figure Set the Temperature Coefficient value refer Section3 2 2 Select the required reference temperature refer Section 3 2 3 3 5 Calibration with Standard Solution Calibration of the unit and cell with standard solutions will only be necessary if 1 2 The cell constant is unknown The cell constant has changed due to replatinising wear or damage to the plates An ATC slope
22. r over range Intermittent display Reading drifts Non linear readings Poor reproducibility Will not print Troubleshooting Possible Cause Check power supply Check power supply Conductivity cell defective Intermittent or no connection Conductivity cell defective Contaminated solutions Conductivity cell not fitted correctly Conductivity cell stored dry CO absorbtion by sample Conductivity cell not zeroed Carryover between solutions 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 4520 not to operate Replace conductivity cell Check cell connection to 4510 Replace conductivity cell Replace solutions Check connections Allow to soak for 2 hours Noticeable for low conductivity do not allow sample to stand in unstoppered bottles Zero conductivity cell Rinse cell in distilled water between measurements 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 24 452 050 REV A 03 03 EC Declaration of Conformity JENWAY Model 4520 Conductivity TDS Meter complies with the following European Standards EN 50081 1 1992 Electroma
23. rature coefficient between the values of 0 00 to 4 00 default 1 91 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 8 452 050 REV A 03 03 Reference Temp Ultra Pure Temp Correction allows the reference temperature to be set to 18 20 or 25 C default 25 C using the Up Down keys which toggle between the values this option can be enabled or disabled by using the Up Down keys which toggle between the two options 3 2 4 Calibration Buffer Setup Select the Calibration Buffer Setup sub menu by highlighting the option and pressing the STO key The following menu will be shown Exit Cal Buffers Used Cal Buffer Set Cal 1 Buffer mS Cal 2 Buffer mS Cal 3 Buffer mS Cal Buffers Used One Cal Buffer Set Auto Recognition Cal 1 Buffer mS 0001 412 Cal 2 BufferimS 0012 6880 Cal 3 Bufter mS 0000 084 enables the user to exit the Setup menu and return to the main set up screen allows selection of 1 2 or 3 point calibration allows selection of Auto Recognition or Manual Entry of buffers Selection of the preferred option can be made using the Up Down keys which toggle between the two options allows Cal 1 manual buffer value to be set 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 allows Cal 2 manual buffer va
24. t in Conductivity and TDS of samples and standards 2 Mode annunciators shows selected measurement mode Conductivity or TDS 3 Secondary display 3 digit display Provides direct readout of automatic or manual temperature 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 when selected SETUP MODE STATUS or RESULTS If a double headed arrow symbol is present this indicates that the mode can be changed to an alternative option pH mV 7 Real time clock will display either date or time 8 The following symbols will appear along the display 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 3 452 050 REV A 03 03 2 4 Keypad 1 ESC 2 CAL CLR 3 Print key 4 Up Arrow 5 Down Arrow 6 Left Arrow 7 Right Arrow 8 STO ay 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
25. tes in deionised water after use and for short term storage immerse the cell in deionised water Although it is not essential to store the conductivity cell with the plates in a wetted condition if they are allowed to dry out completely initial stability on re use may be impaired until the cell plates become re wetted Do not attempt to clean the cell plates as this will remove the black platinization and alter the calibration and accuracy of the probe If the cell plates become worn or damaged the plates should be re platinised and the cell constant recalculated Ensure no salt deposits or particulate matter are allowed to build up around the cell plates or on the probe body as this may produce a conductivity path lower than that through the solution It is recommended that such deposits be removed by soaking the cell in deionised water No attempt should be made to wipe off these deposits as this may cause damage to the cell plates Ensure the correct reference temperature is selected for the operating procedures being used 6 452 050 REV A 03 03 3 2 Set Up Parameters The following section details the set up modes available to the user on the main 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 language English French German Italian Spanish or Portuguese Use the Up Down keys to scro
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