HI 84442 - Hanna Instruments
Contents
1. n 30 in 37 All rights are reserved Reproduction in whole or in part is prohibited without the written consent of the copyright owner Hanna Instruments Inc Woonsocket Rhode Island 02895 USA PRELIMINARY EXAMINATION Please examine this product carefully Make sure that the instrument is not damaged If any damage occurred during shipment please notify your Dealer Each HI 84442 minititrator is supplied complete with HI 1131B pH electrode HI 7071S Filling solution 30 ml HI 7662 M Temperature probe e 84442 50 Titrant Stock solution 100 mL must be diluted before use e HI 84442 55 Pump calibration solution 100 e HI 7061M Cleaning solution 230 ml e HI 7004M pH 4 01 buffer solution 230 ml e HI 70083M pH 8 30 buffer solution 230 ml e HI 7010M pH 10 01 buffer solution 230 mL e Two 100 mL beakers e 100 mL white bottle e Tube set with dispensing tip e Stir bars medium 2 pcs e 12 Vdc power adapter e Instruction manual Notes The titrant used during titrations is obtained from HI 84442 50 Titrant Stock Solution by dilution in 1 10 ratio v v see the Titrant Preparation procedure e Save all packing material until you are sure that the instrument works correctly Any defective item must be returned in its original packing GENERAL DESCRIPTION The HI 84442 is an easy to use microprocessor based automatic minititrator and pH meter designed for rapid and ac2. wed Pe Titr ator VIEW OR DELETE PREVIOUSLY LOGGED RECORDS Press MENU key while in pH meter screen Press Recall to access the pH recall A list of records is stored in the pH log 5 55 2005709209 ard 2005709209 5 8 2008709209 Use ARROW keys to scroll the list of records Press More to see detailed information about the highlighted record Press Delete to enter record deleting mode Press Delete All to enter all records deleting mode If More is pressed a complete set of data is displayed Record number 1 2008 09 09 17 47 55 8 85PH 26 9 C Offset 4 mv Slope 38 07 Use ARROW keys when is displayed to scroll between the records If Delete was pressed the instrument will ask for confirmation Delete Record 2005 09 09 e rd 2005 09 09 9 00 2005 09 09 Confirm Use the ARROW keys to focus on the record to be deleted Press Confirm to delete the record or ESC to return to the previous screen without deleting 32 Deleting a record will renumber the list of records If Delete All was pressed the instrument will ask for confirmation Delete all records 1 2 gh 2008 03 03 a r3 S008 03 03 e rd 2005 09 09 9 00 2005 09 09 Confirm Press Confirm to delete all records or ESC to return to the previous screen without deleting If the pH log is empty the message No Records will be displayed PH log on demand Ho Records pH METER GLP INFORMATION The pH
3. Range 20 0 to 120 0 C 4 0 to 248 0 F Resolution 0 1 C Accuracy 0 4 C without probe error 1131B included HI 7662 M included 0 to 50 C 32 to 122 F max 95 RH non condensing 12 Vdc power adapter 208 x 214 x 163 mm 8 28 4 6 4 with beaker 2200 g 77 oz REQUIRED REAGENTS Code Description Quantity Test HI 84442 50 Titrant mL HI 84442 55 Pump Calibration Solution ml PRINCIPLE OF OPERATION Water alkalinity determination is performed by titration with acid reagent to pH end point Alkalinity is expressed as e Total alkalinity determination by titration at 4 5 pH following the reactions If sample ph gt 8 3 pH then H0 28 0 50 2007 50 2HC0 507 Otherwise 2 50 2H CO 0 It is important that the samples are protected against atmospheric factors store them in sealed bottles that are completely filled and avoid vigorous shaking mixing and long exposure to air The HI 84442 minititrator is designed to determine the potentiometric titration in a very low range mg ml as 84442 55 is used for pump calibration Titratable Alkalinity in waters as performed on the HI 84442 minititrator utilizes a simple sample preparation a high quality peristaltic dosing pump for titrant potentiometric endpoint detector and instantaneaous computations To maintain the high precision of the titrator a simple pump calibration procedure is required
4. ESC to return to the setup menu Date Time Contrast Time Format Date Time TEAM D EY Oo 09 gt 10 50 24 Accert Time format Contrast Date Time Time format lake Format Date format Date Time Time format Date Format Language Date Format HH DD YY Y TT TANS pp TY YY This option is used to set the instrument s date and time Press Modify to change the date time Press to highlight the value to be modified year month day hour minute or second Use the ARROW keys to change the value Press Accept to confirm the new value or ESC to return to the setup Option AM PM or 24 hours Press the functional key to select the new value Press Modify to change the Date Format Use the ARROW keys to select the desired format Press Accept to confirm the value or ESC to return to the setup menu Language Time Far mat 24 hours Date Format vr nv v rH DD Language English Tutorial talano For Tutorial Heter Information Meter information Heter Information Hl 4442 Heter Info Firmware 1 00 Language D E ny 2008 09 06 1 50 44 Temp 200890908 18 01 13 Press the corresponding function key to change the language If the new selected language cannot be loaded the previously selected language will be reloaded If no language can be loaded at startup the instrument will work in the safe mode
5. In sate mode all the messages are displayed in English and tutorial and help information are not available This option is used to enable disable tutorial mode If enabled this option will provide the user short guides on the screen Press the function key to select this option Press the tunction key to select the new option When enabled a short beep is heard every time a key is pressed or when the calibration can be confirmed A long beep alert sounds when the pressed key is not active or d wrong condition is detected while in calibration Press Select to view the firmware version language version mV factory calibration date and time and temperature factory calibration date and time Press ESC to return to the Setup mode ELECTRODE PREPARATION PREPARATION PROCEDURE Remove the electrode protective cap DO NOT BE ALARMED IF ANY SALT DEPOSITS ARE PRESENT This is normal with electrodes and they will disappear when rinsed with distilled water During transport tiny bubbles of air may have formed inside the glass bulb The electrode cannot function properly under these conditions These bubbles can be removed by shaking down the electrode as you would do with a glass thermometer If the bulb is dry soak the electrode in HI 70300 Storage Solution for at least one hour ELECTRODE CALIBRATION PROCEDURE It is recommended to calibrate the instrument frequently especially if high accuracy is required The pH electrode sho
6. The calibration involves the analysis of a known volume of a known solution standard provided and compensate for changes in pump dosing that may occur due to many factors induding tube stretching or aging This procedure should be performed regularly Note To ensure the titrant concentration stability the HI 84442 50 titrant stock solution is 10 times more concentrated than used during titrations Pay attention to dilute titrant in 1 10 ratio v v before use FUNCTIONAL AND PHYSICAL DESCRIPTION OVERHEAD VIEW Titrant bottle Graphic LCD Keypad Dedicated guide tube for Temperature Probe Electrode holder Dedicated guide tube for titrant tip 7 Peristaltic pump tube Se ow N FRONT VIEW REAR VIEW 8 Temperature probe 9 pH Electrode 10 Beaker 11 BNC electrode connector 12 Temperature probe socket 13 Power switch 14 Power adapter connector 15 Peristaltic pump KEYPAD FUNCTION AND INDICATORS instruments HI 84442 TOTAL ALKALINITY LOW RANGE ESC used to leave the current screen and to return either to the previous screen or to the main screen When pressed while modifying a parameter within the SETUP menu exits parameter without changing it V A used to modify the parameters values to scroll the information displayed while viewing a help or to move between the options from the instrument s SETUP HELP used to access leave the instrument s contextual h
7. calibration completed el Notes If an erroneous situation is encountered during the calibration an error message is displayed and the calibration can be restarted by pressing Restart 24 Pump Calibration Error Wrong standard f the calibration doesn t complete within 6 minutes the error message Too much standard will be displayed and the calibration can be restarted by pressing Restart affer a new standard is prepared Pump Calibration Error Tao much standard e When pump calibration is complete carefully unscrew electrode holder with pH electrode temperature probe and titrant top intact Hold over rinse beaker and rinse off with distilled or deionized water Remove beaker and rinse out TITRATION PROCEDURE Verify The instrument has been calibrated pH and pump before performing a lot of titrations An electrode calibration in at least one point 4 01 pH buffer is recomme nded e Refer to Setup Configuration Menu see the Setup section m fo set up the instrument for your measurement e Sample preparation For all measurement samples fill a beaker up to the 75 mL mark with sample Place the stir bar into the beaker and then place the beaker in the appropriate place on the instrument top Note Water samples must be collected and stored in capped botlles e Position the electrode holder on the top of the beaker and secure it by turning clockwise e Before immerse the electrodes in t
8. e Remove the electrode holder with electrodes trom the top of the beaker e Place the second buffer into beaker and place in beaker holder Rinse the electrodes in a beaker containing the second buffer rinsing solution e Place the electrode holder with electrodes on the top of the beaker lock cap by turning e f necessary press the ARROW keys in order to select a different buffer value e he X unstable measurement symbol will be shown on the display until the reading becomes stable e When the reading is stable and close to the selected buffer the unstable measurement symbol will disappear and the Confirm key will become active Electrode Calibration Electrode Calibration 4 tH 0 3l HTE H 9 5 MTE 23 5 C Buffer 2 8 30pH Buffer 2 8 30pH Confirm Confirm e Press Confirm to confirm the calibration e he calibrated value will be shown on the display and the third expected buffer value will be automatically selected e After the second calibration point has been confirmed press ESC to exit without pertorming the third calibration point Point 3 calibration e Remove the electrode holder with electrodes trom the top of the beaker e Place the third buffer solution in a beaker and place in beaker holder Rinse the probes in a beaker with third butter rinsing solution Place the electrode holder with electrode in the beaker with third buffer and secure top by locking e unstab
9. power up the instrument enter pH meter mode From titrator mode press ESC until pH units are displayed If an electrode calibration hasn t been performed or the number of days exceeds calibration timeout value set the displayed message CAL DUE will blink on the left side of the display see Calibration timeout option in Setup for details Place pH electrode into electrode holder and connect it to the instrument Rinse the pH tip with distilled or deionized water Immerse the pH bottom 2 cm 0 8 in the sample and stir gently for a few seconds For a faster response and to avoid cross contamination of the samples rinse the electrode tip with a few drops of the solution to be tested before taking measurements lf CAL DUE is displayed perform an electrode calibration 16 52 54 pH meter Ql trator Press MENU to access the instrument s menu Press HELP to view the contextual help every time you need supplementary information The help is customized for every situation that can appear during instrument usage Press STIR to start stop the stirrer Press Titrator to enter titrator mode Press CAL to access the calibration menu 30 Press LOG to memorize the current reading A message indicating the free log space will be displayed for a few seconds 16 55 07 pH meter Free Log space 54 Titrator In order to take pH measurements follow the next steps e Submerge the pH bulb 2 cm 0 8 and the temperature probe in
10. timeout Options Disabled or 1 to 7 days Concentration unit This option is used to set the number of days Calibration timeout iE ad PH Resolution before the pH calibration expired warning message Temperature unit is flagged Press Modify to access the calibration timeout value modify parameter Cshbssthon Enmweouk Use the ARROW keys in order to increase decrease the value 2 days Press Accept to confirm or ESC to return to the setup menu without saving the new value pH resolution Options 0 1 0 01 Concentration unit mg L Press the displayed function key in order to change Calibration timeout the pH resolution PH Resolution Temperature unit Temperature unit Options C F Calibration timeout Press the function key in order to change the PH Resolution Temperature unit temperature unit Backlight Backlight Options 0 to 8 Resolution Press Modify to access the backlight level Temperature unit Contrast Backlight Use the ARROW keys or in order to oe indease decease the displayed constrast Press Accept to confirm or ESC to return to the setup menu Contrast Option 0 to 20 Temperature unit This option is used to set the display s contrast Backlight i isplay eiae Press Modify to change the display s contrast Date Time Use the ARROW keys or in order to increase decrease the value Press Accept to confirm the value or
11. will display the message Wrong Slope If the slope is too high the symbol will be displayed If the slope is too low the symbol me will be displayed Electrode Calibration Electrode Calibration H 6 79 ATE E 7 3 7 RTC Wrong Wrong 20 9 C Slope wi SUPH Slope wit SUH e f the Wrong Old Slope error message is displayed an inconsistency exists between the current and the previous old calibration Clear the calibration parameters by pressing Clear and proceed with calibration trom the current calibration point The instrument will keep all the contirmed values during the current calibration point Electrode Calibration 091 Mr ong Old Slope 5 3 pH ESTA f the temperature reading is out of the defined temperature range of the buffer 0 to 45 C the Wrong Buffer Temperature error message will be displayed and the symbol C will blink on the display Calibration cannot be contirmed in this situation Electrode Calibration 0 76 arc Wrong Buffer 45 3 0 Temperature ait SUPH pH BUFFER TEMPERATURE DEPENDENCE The temperature has an effect on pH The calibration buffer solutions are affected by temperature changes to a lesser degree than normal solutions During calibration the instrument will automatically calibrate to the pH value corresponding to the measured or set temperature During calibration the instrument will display the pH buffer value at 25 C pH BUFFERS o a
12. Instruction Manual HI 84442 TOTAL ALKALINITY FOR VERY LOW RANGE MINITITRATOR amp pH METER for Water Analysis W HANNA instruments ww hannainst com Dear Customer Thank you for choosing a Hanna product This manual will provide you with the necessary information for the correct use of the instrument Please read it carefully before using the meter If you need additional technical information do not hesitate to e mail us at tech cOhannainst com This instrument is in compliance with C directives TABLE OF CONTENTS PRELIMINARY EXAMINATION utate In etra ttes 3 4s 3 BE UI MIN ease 6 PRINCIPLE OF OPERATION AND PEDESTEATUESERIE ILO Nc cereo 0 TU c 10 SENE ELEC RO UE RET 15 PEE CIRO UE CALIBRATION PROCEDURE l6 pA BUFER TEMPERATURE DEPENDENCE 20 n 20 21 i 2 PUMP CALIBRATION 23 Iis Nai E 97 0Y 25 ME 30 TEMPERATURE CALIBRATION PROCEDURE for technical personnel 34 TROUBLESHOOTING GUIDE 36 ELECTRODE CONDITIONING amp MAINTENANCE esent 3 fisci o
13. L bottle CLEANING SOLUTION HI 7061M Electrode Cleaning Solution 230 mL bottle OTHER ACCESSORIES HI 70483M Tube set with cap and tip for titrant bottle HI 731319 Stir bar 25 x 7 mm 10 pcs HI 731342 20001 fixed volume pipette HI 731352 Tip for 2000uL fixed pipette 4 pcs HI 731341 10001LL fixed volume pipette HI 731351 Tip for 1000uL fixed pipette 25 pcs 30 WARRANTY HI 84442 is warranteed for two years against defects in workmanship and materials when used for its intended purpose and maintained according to the instructions This warranty is limited fo repair or replacement free of charge Damage due to accident misuse tampering or lack of prescribed maintenance is not covered If service is required contact your dealer If under warranty report the model number date of purchase serial number and the nature of the failure If the repair is not covered by the warranty you will be notified of the charges incurred It the instrument is to be returned to Hanna Instruments first obtain a Returned Goods Authorization Number from the Customer Service Department and then send it with shipment costs prepaid When shipping any instrument make sure it is properly packaged for complete protection To validate your warranty fill out and return the enclosed warranty card within 14 days from the date of purchase RECOMMENDATION FOR USERS Before using this product make sure that it is entirely suitable for your specific applica
14. RE THE pH ELECTRODE IN DISTILLED OR DEIONIZED WATER PERIODIC MAINTENANCE Inspect the electrodes and the cables The cable used for connection to the instrument must be intact There should be no cracks on the electrode stem or bulb Connectors must be perfectly dean and dry If any scratches or cracks are present replace the electrode Rinse off any salt deposits with water pH CLEANING PROCEDURE e General Soak in Hanna HI 7061 or HI 8061 General Cleaning Solution for approximately 1 2 hour IMPORTANT After performing any of the deaning procedures rinse the electrode thoroughly with distilled or deionized water and soak the electrode in HI 70300 or HI 80300 Storage Solution for at least 1 hour before use Recalibrate electrode before using 3 ACCESSORIES REAGENTS 84442 50 Titrant solution for low range 100mL HI 84442 55 Pump calibration solution 100ml HI 84442 70 Reagents kit for low and high range about 500 titrations pH CALIBRATION SOLUTIONS HI 7004M Butter solution pH 4 01 230ml HI 70083M Buffer solution pH 8 30 230mL HI 7010M Buffer solution pH 10 01 230ml HI 7004M 6 Butter solution pH 4 01 6 x 230ml 70083M 6 Buffer solution pH 8 30 6 x 230ml HI 7010M 6 Buffer solution pH 10 01 6 x 230ml ELECTRODES HI TI3IB pH Electrode HI 7662 M Temperature probe ELECTRODE FILL SOLUTION 70715 Filling solution 30 mL for HI 1131 ELECTRODE STORAGE SOLUTION HI 70300M Storage Solution 230 m
15. TRATOR GLP INFORMATION Press MENU while in Titration mode and then GLP GLP elec From this screen it is possible to select between viewing the electrode GLP or the pump GLP Press GLP elec to view the electrode s last calibration parameters and date Press GLP pump to view the pump s last calibration time and date lf GLP elec is pressed one of the next screens will be displayed Last elec cal Date 20060909 Time 17 35 37 Cal Expire Disabled Offset 2 1mwv Slope 100 17 Electrode condition 1005 GLP contains a set of information regarding electrode calibration The following items are included in electrode GLP the time and date of the last calibration offset slope calibration timeout and the calibration buffers The butfers displayed in video inverse mode are trom the previous calibration If a calibration hasn t been performed the message Not Calibrated will be displayed Last elec cal Hot Calibrated If GLP pump is pressed one of the next screens is displayed LLP pump Time 18 04 00 Date 208703708 29 The pump GLP displays the Time and Date of the last pump calibration If a calibration hasn t been performed the message Not Calibrated will be displayed LLP pump Hot Calibrated pH MEASUREMENT The HI 84442 may be used as a pH meter for direct measurements Verify that the instrument has been calibrated betore taking pH measurements Set the instrument to pH meter At
16. a for pH electrode and pump MEASUREMENT SIGNIFICANCE Water alkalinity is expression of a waters acid neutralizing capacity and it is determined by titration with standard acid solutions Alkalinity is an important parameter for control and treatment of potable and wastewaters because it indicates the water buffering capacity ability to resist at pH change primarily because of bicarbonate carbonate content A low water alkalinity signifies that the water is susceptible to pH change and high alkalinity indicates that water is able to resist a major change of pH Alkalinity can be used to estimate water hardness or to determine water corrosive capacity Alkalinity of surface water quantified by mg L as CaCO meg L may be caused by carbonate bicarbonate hydroxide phosphates borates silicates or organic acids salts Conventionally the water alkalinity is approximated as sum of components Three types of alkalinities exist together to form total alkalinity 0 HCO OH hydroxide alkalinity C0 carbonate alkalinity HCO bicarbonate alkalinity TA total alkalinity Total alkalinity of water is determined by titration with an acid solution at fixed 4 5 pH value Potentiometric end point detection using a pH electrode is more objective than using visual end point determinations with color changing indicators The HI 84442 minititrator is a potentiometric titrator The instrument also can be used a
17. be tested paying attention not to touch the stir bar Insert the dosing tip in the appropriate guide tube holder place taking care not to empty the tip Note The chemical reagents may be hazardous if improperly handled Read the Material Safety Data Sheets MSDS before performing the test From the titrator main screen press CAL Cuide tube holder Titration 23 The instrument displays the date and time of the last electrode calibration and the date and time of the last pump calibration or calibration expired messages Calibration Last pump Calibration 2087 03 03 10 57 51 Last electrode Calibration 2087 03 03 10 57 12 Electrode Pume Press Pump The next screen will be displayed Pump Calibration Verify Recent electrode calibration in 4 01 pH buffer Titrant electrode and Press Start After the pump calibration is started on the upper right side of the display two animations will be shown in order to indicate that the pump and the stirrer are working On the lower fight side of the display is shown the amount of time that has passed since beginning of the calibration Pump Calibration H _ Calibration in progress 00 11 After the pump calibration is complete a confirmation message is displayed for a few seconds then the instrument will return to the titrator calibration menu and will display the new time and date for the last pump calibration Pump Calibration FA Pump
18. cVVV8SNVIN For e mail contacts and a complete list of Sales and Technical offices please see www hannainst com
19. curate analysis of total very low alkalinity in water By eliminating subjective factors including color indicators errors in mathematical calculations or erratic titrant additions from the measurement the HI 84442 makes Total Titratable alkalinity analysis precisely This will quickly become a valuable alkalinity analysis tool of waters The instrument benefits from Hanna s many years of experience as manufacturer of quality analytical instruments A clear and well designed user interface makes the instrument intuitive and simple to use A dedicated HELP key aids in set up calibration status and troubleshooting By simply pressing the START key the HI 84442 automatically starts pump operation and titrates the sample to the end point The HI 84442 has a simple and accurate peristaltic pump to ensure the best accuracy and repeatability By performing pump calibration with the Hanna standard provided 3 the instrument accuracy is assured The instrument employs a powerful and effective built in algorithm to analyze the pH response to determine the exact pH endpoint then uses this to make the necessary calculations The Titratable Alkalinity determination is instantaneously displayed in selected measurement units on the large dot matrix display The instrument is ready for the next analysis immediately Other features Log on demand up to 100 samples 50 for pH measurement 50 for titration results e GLP feature to view last calibration dat
20. d sample additions VIEW DELETE LOGGED SAMPLES Press MENU key while in Titrator main screen Setup Recall GLP Press Recall to access the titrator logged data The instrument will display a list of all the titration records stored in the titration log Use the ARROW keys to scroll the stored records list n If the saved concentration was out of range the symbol is displayed in front of the reading 2 male Press Delete to enter delete record screen Press Delete All to enter delete all records screen Press More to view additional information of the measurement Record number 1 Date 2008 03 03 Time 17 41 03 Concentration Press Unit to convert the result between meg L and mg L Press ESC to return to the previous screen Use the ARROW keys when is displayed to scroll between the log records Delete Record mall Confirm If Delete was pressed the instrument will ask for confirmation Use the ARROW keys to focus on the record to be deleted Press Confirm to delete the record or ESC to return to the previous screen Deleting a record will renumber the list of records If Delete All was pressed the instrument will ask for confirmation Delete all records mall Confirm Press Confirm to delete all the records or ESC to return to the previous screen If the titrator log is empty the message No Records will be displayed Titration results Ho Records 28 TI
21. de Wrong pump calibration solution Broken pump tubing Broken electrodes Broken temperature probe Concentration out of range One of the keys is blocked Internal error 36 SOLUTION Soak the electrode tip HI 7061 deaning solution for 30 minutes Refill with fill solution Clean the electrodes Refill with fresh fill solution Check cable connection to meter and verify protective cap is removed Check cable connection to meter and verify protective cap is removed Check the quality of the sample Clean the electrodes Refill with fresh fill solution Replace the electrode or contact the vendor Verify tubing is intact and and titrant passes when purged Verify the electrode has been calibrated recently in fresh pH buffers Check the pump calibration solution Prepare another standard purge to have fresh titrant and restart the calibration Replace temperature probe Prime and recalibrate the instrument pump Check the keyboard or contact the vendor Power off the meter and then power it on again If the error persists contact the vendor ELECTRODE CONDITIONING AND MAINTENANCE STORAGE PROCEDURE To assure a quick response time the glass bulb should be kept moist and not allowed to dry out Replace the solution in the protective cap with a few drops of HI 70300 or HI 80300 Storage Solution Follow the Preparation Procedure section before taking measurements Note NEVER STO
22. e o enter user calibration screen press and hold down the ARROW keys simultaneously then power on the instrument After a few seconds the User calibration screen is displayed User calibration e Press Temp function key to enter temperature calibration e mmerse the temperature probe in the vessel with ice and water as near as possible to the reference thermometer Allow a few seconds for the probe to stabilize e Use the ARROW keys to set the calibration point value to that of the ice and water measured by the reference thermometer e he unstable measurement symbol will be shown on the display until the reading becomes stable e When the reading is stable and dose to the selected calibration point the unstable measurement symbol will disappear and the Confirm key will become active Temperature 00 Foint 1 t Confirm e Press Confirm to confirm the calibration point The meter will be automatically move to the second calibration point and will display 50 C for the buffer value 34 e mmerse the temperature probe in the second vessel as near as possible to the reference thermometer Allow a few seconds for the probe to stabilize e Use the ARROW keys to set the calibration point value to that of the hot water measured by the reference thermometer e he X unstable measurement symbol will be shown on the display until the reading becomes stable e When the reading is stable and close to the se
23. e or rs a am e sf ae or fm ras am COCO TITRANT PREPARATION Take 10 mL HI 84442 50 titrant solution accurate measured and add to the clean 100 mL white bottle Add 90 mL of distilled water Mix carefully Use new obtained titrant on the further titrations 20 PUMP TUBE INSTALLATION To mount the new peristaltic pump tube follow next steps e Position one peristaltic pump fixing ring on its location e Stretch the tube over the peristaltic pump rolls e Fix the second pump fixing ring on its location e Attach the tube to the reagent bottle Note Purge the peristaltic pump until drops of reagent appears on the dosing tip by pressing the PURGE key from the titrator main screen To remove the tube of the peristaltic pump follow next steps Caution Purge line with water fo remove titrant solution from tube e Detach the tubes system from the reagent bottle e Grasp one fixing ring of the peristaltic pump tube e Pull the tube until the fixing rings are taken out from their location e Remove the other side of the tube Fixing rings locations Fixing rings PURGE Purging should be pertormed e whenever the tube of the peristaltic pump is replaced e whenever the titrant is changed or a new bottle is used before starting a pump calibration e before starting a lot of titrations In order to start purging press the Purge key from the titrator main screen The
24. e in case of error conditions empty titrant bottle tubes or dosing tip disconected pump error e if you want to resume at a later time lf Pause is pressed the next screen is displayed Purge Press Resume to continue Purging Faused 14 32 Resume Press Resume to continue purging 22 After 5 minutes purging interval has elapsed the Completed message is displayed Another purge period can be initiated by pressing Restart or press ESC to return to main titrator screen Completed PUMP CALIBRATION PROCEDURE The pump calibration must be performed each time the titrant bottle or the pH electrode is changed It is recommended the pump calibration to be performed before each set of titrations Verify The electrode has been calibrated in 4 01 pH buffer e Sample preparation Add 1 mL of HI 84442 55 Pump Calibration Solution to a clean beaker Fill the beaker up to the 75 mL mark with the distilled or deionized water Place the stir bar into the beaker and then place the beaker into the appropriate place on the instrument top Place the electrode holder on the top of the beaker and secure it by turning clockwise Before immerse the electrodes in the beaker Carefully rinse the pH electrode and temperature probe with deionized water Dry electrodes using sott paper Rinse again with the deionized water Immerse the calibrated pH and the temperature electrodes approximatively 2 cm 0 8 into the sample to
25. elp MENU used to enter SETUP Recall or GLP selection menu while instrument is in pH or Titration main screen STIR used to start stop the stirrer Note The stirer starts automatically during pump calibration and titration and cannot be stopped by pressing STIR key GUIDE TO INDICATORS During the instrument s operation information is displayed on the LCD Displayed icons amp Unstoble reading Pump running T Stirrer on 4 08 50 06 PH meter i 9 v Parameter can be changed 1 Current time and instrument mode information pH meter or Titrator 2 pH electrode condition information 3 Main reading information 4 Instrument status information 5 Functional key area 6 Indicates that the displayed value can be changed using ARROW keys 7 Temperature value C F 8 pH temperature compensation mode Manual or Automatic 9 Stirrer and reading status area PERISTALTIC PUMP Peristaltic pumps are self priming Liquid never contacts the pump components The titrant tubing is pressed along the rotating rollers of the pump The rollers compress the tubing driving the titrant to the dispensing tip TITRATOR STARTUP This is a general outline of the steps required to make a titration The following sections expand upon each section e Place the instrument on a flat table Do not place the instrument in direct sun light e Connect the power adapter to the instrument e Turn
26. he beaker Carefully rinse the pH electrode and temperature probe with deionized water Dry electrodes using sott paper Rinse again with the deionized water Immerse the pH and the temperature electrodes approximatively 2 cm 0 8 into the sample to be tested paying attention not to touch the stir bar Use O Rings provided to secure the pH electrode in holder 25 e Insert the dosing tip in the appropriate holder place e From the titrator main screen press Titration To enter titrator main screen from pH meter mode press Titrator and then Continue Titration Prepare the sample amp add shir bar attach the electrode holder the electrodes ix the dosing tip e Press Start to begin the titration process e After the titration is started on the upper right side of the display two animations will be shown in order to indicate that the pump and the stirrer are running On the lower right side Titration Titr ation in progress of the display is shown the period of time since the titration has been started Titration 7133 Completed _1 Unit Festart e After the titration is complete the concentration value is displayed in the selected unit e Press Unit to change the display unit e Press LOG to record the concentration value into the instrument s memory A message will be displayed for a few seconds indicating the amount of the free log space 50 log samples can be recorded in the instrumen
27. le measurement symbol will be shown on the display until the reading becomes stable e When the reading is stable and close to the selected buffer the unstable measurement symbol will disappear and the Confirm key will become active e Press Confirm to confirm the calibration The instrument stores the calibration value and returns to Electrode Calibration Electrode Calibration 4 AY 1009 10 09 ea ea BL Buffer 3 10 0 1pH Buffer 3 10 0 1pH Confirm Confirm pH meter titrator calibration menu where the date and time for the last pH calibration will be displayed Notes A buffer confirmed during the calibration process is removed from the list of calibration buffers available for further calibration points f the value measured by the instrument is not dose to the selected buffer a Wrong Buffer error message will be shown on the display Check if the correct buffer has been used or regenerate the pH electrodes by following Electrode Calibration the Cleaning Procedure see the pH Cleaning Procedure section If necessary change the buffer or the electrode Electrode Calibration By 926 m mi op ATC Electrode Dirty Broken Contaminated 35 30PH e f the measured offset isn t within the preset limits the meter will display the message Buffer Contaminated alternatively with Electrode Dirty Broken f the computed slope isn t within the preset limits the meter
28. lected calibration point the unstable measurement symbol will disappear and the Confirm key will become active e Press Confirm to confirm the calibration point The instrument will return to the pH meter titrator main screen Temperature 000 Foint 2 50 0 Confirm Notes If the reading is not close to the selected calibration point the Wrong message will be displayed Change the temperature probe and restart the calibration Temperature Jl3 Wrong Foink 2 h tc f the temperature probe is disconnected or the measured temperature is out of the 20 10120 C range the instrument will display The calibration point value can be changed using the ARROW keys Temperature oC Wrong Foink 2 h t 35 TROUBLESHOOTING GUIDE SYMPTOMS Slow response excessive drift Reading fluctuates up and down noise While in pH reading mode 2 00 or 16 00 pH is displayed blinking he meter does not accept the pH buffer solution for calibration The pump calibration can t be performed The temperature probe is connected but the meter displays MTC After a titration the instrument displays blinking At startup the meter displays the HANNA logo permanently Error xx displayed message is PROBLEM Dirty pH electrode Clogged dirty junction Low electrolyte level refillable pH electrodes only Cable connection Reading out of range Broken pH electro
29. meter GLP information references the last pH calibration data To view this information press MENU key while in pH meter mode then GLP A set of information regarding electrode calibration is displayed Last elec cal Date 208703703 Time 17 35 37 Cal Expire Disabled Offset 2 1mwv Slope 100 17 Electrode condition 1005 The following items are included in electrode GLP the time and date of the last calibration offset slope electrode condition calibration timeout and the calibration butfers The butfers displayed in video inverse mode are from the previous calibration If a calibration hasn t been performed the message Not Calibrated will be displayed Last elec cal Hot Calibrated 33 TEMPERATURE CALIBRATION PROCEDURE for technical personnel only All the instruments are factory calibrated for temperature HANNA s temperature probes are interchangeable and no temperature calibration is needed when they are replaced If the temperature measurements are inaccurate temperature recalibration should be performed For an accurate recalibration contact your dealer or the nearest HANNA Customer Service Center or follow the instructions below e Prepare d vessel containing ice and water and another one containing hot water at a femperature of around 50 C Place insulation material around the vessels to minimize temperature changes e Use a calibrated thermometer with a resolution of 0 1 C as a referenc
30. purging stops automatically atter 5 minutes To access the Purge key follow the next steps e From the instrument main screen pH meter screen press Titrator function key 10 04 14 pH meter Cond H wt Gl m es 70 Titrator The instrument will display the next screen if any of the following conditions exist the meter hasn t been calibrated in 4 01 pH buffer the pH calibration has expired d pump calibration hasn t been performed or more than 3 days have passed since the last pump calibration 21 17 45 10 Warning Ta obtain accurate results calibrate electrode in 4 01 PH buffer Perform a pump calibration Press CAL to access the titration calibration menu where electrode and pump calibration may be accessed Press HELP to view the contextual help e Press Continue or ESC to skip the message and enter Titrator main screen 10 06 07 Titeator Choose ane option Titration e Press Purge to begin a purge cycle Pure in progress 4 53 Pause Stop __ The purging stops automatically after 5 minutes To stop purging at any time and return to the main screen press ESC or Stop During a purge the remaining time until the purge process will be completed is shown on the lower right side of the display Press Pause to interrupt the purge process Press Pause or Stop by pressing the corresponding function key in the purge screen e after the first drops of fresh titrant appear at the dosing tip
31. s a pH meter The volume of titrant dispensed necessary to reach the end point is then used to calculate the water alkalinity expressed in mg L as CaCO meq L as CaCO Interferences e dissolved gases lost or gained during samples storage or transport can modify the alkalinity of the samples e presence in the samples of the precipitates solid suspensions oils soaps can coat a pH electrode To eliminate or diminish the interference effects it is recommended e to protect the samples against the atmospheric action store in an airtight vessel e to avoid vigorous shaking or mixing stir gently e maintenance of the pH electrode see section Electrode Conditioning and Maintenance SPECIFICATIONS Titrator pH meter Temperature Electrode Temperature Probe Environment Power supply Dimensions Weight Range Titratable alkalinity mg L 3 00 10 00 mg L as CaCO meq L 0 06 0 20 meg L as Resolution Titratable alkalinity 0 01 mg L 0 01 meg l Accuracy 5 of reading Titration method Acid base titration Principle End point titration 4 50 pH Pump debit 0 5 ml min Stirring speed 700 rpm Log data Up to 50 samples pH meter 2 0 to 16 0 pH 2 00 to 16 00 pH pH Resolution 0 1 pH 0 01 pH pH Accuracy 0 01 pH pH Calibration 1 2 or 3 calibration points 3 available buffers 4 01 8 30 10 01 Temperature manual or automatic from compensation 20 120 C 4 to 248 F Log data Up to 50 samples
32. t s memory When the titrator free log space is under 1296 the message will be shown permanently Titration 733 Completed Unit Restart e f the concentration is out of limits an exceeded range limit message will be displayed blinking and the message Out of range will be shown Another titration can be initiated by pressing Restart 26 Titration 10 00 Out of ranae _1 Unit Restart e Remove electrode holder Rinse the electrode into waste container e Prepare a fresh sample and place on titrator Place the temperature probe and the electrode in the appropriate guides Immerse the titrant tip and use care not to dislodge titrant from dispensing tip Note If the end point is not reached or it is not recognized or the input reading is out of range an error message will be displayed The titration can be restarted after a new sample is prepared by pressing Restart Titration M Error Wrong input For details press Help TIPS FOR AN ACCURATE MEASUREMENT e Calibrate the instrument in 4 01 pH buffer solution at least once a day before you start to perform measurements e Purge the peristaltic pump to have the fresh titrant when starting a new calibration e Calibrate the peristaltic pump daily before performing a set of analyses e Clean the electrode in order to remove the possible coating from bulb e Precision of the measurement can be improved by using volumetric pipettes for standard an
33. the instrument ON using the power switch from the rear panel of the instrument e Set up the instrument See the Setup Configuration Menu section for details e Connect the pH sensor and temperature probe to the instrument e Calibrate the pH electrode At least a single point calibration is necessary for titration e Place the peristaltic pump tube on the pump inlet tube is connected with the reagent bottle outlet tube is connected with the dosing tip See the Pump Tube Replacement section for the procedure e Remove the reagent bottle cap and replace the bottle cap with the tubes Place the reagent bottle in the appropriate place on the titrator top e Purge the titrant e Calibrate the pump e Prepare the sample e Run a titration and log sample results SETUP CONFIGURATION MENU The titrator s setup configuration menu may be accessed from the pH or titration screens by pressing the MENU key then Setup A list of setup parameters will be displayed with currently configured setting While in the setup menu it is possible to modify the instrument s operation parameters The ARROW keys permit the user to scroll the setup parameters Press HELP to view the contextual help Press ESC to return to the main screen Concentration unit Options mg L meg L Concentration unit maL Press the corresponding function key to change the Calibration timeout Di PH Resolution option Temperature unit Calibration
34. tion and for the environment in which it is used Operation of this instrument may cause unacceptable interferences to other electronic equipments this requiring the operator to take all necessary steps to correct interferences Any variation introduced by the user to the supplied equipment may degrade the instrument EMC performance To avoid damages or burns do not put the instrument in microwave ovens For yours and the instrument safety do not use or store the instrument in hazardous environments Hanna Instruments reserves the right fo modity the design construction and appearance of ifs products without advance notice SALES AND TECHNICAL SERVICE CONTACTS Australia Tel 03 9769 0666 Fax 03 9769 0699 China Tel 10 88570068 Fax 10 88570060 Egypt Tel amp Fax 02 2758 683 Germany Tel 07851 9129 0 Fox 07851 9129 99 Greece Tel 210 823 5192 Fax 210 884 0210 Indonesia Tel 210 4584 2941 Fax 210 4584 2942 Japan Tel 03 3258 9565 Fax 03 3258 9567 Korea Tel 02 2278 5147 Fax 02 2264 1729 Malaysia Tel 603 5638 9940 Fax 603 5638 9829 Singapore Tel 6296 7118 Fax 6291 6906 South Africa Tel 011 615 6076 Fax 011 615 8582 Taiwan Tel 886 2 2739 3014 Fax 886 2 2739 2983 Thailand Tel 66 2619 0708 Fax 66 2619 0061 United Kingdom Tel 01525 850 855 Fax 01525 853 668 USA Tel 401 765 7500 Fox 401 765 7575 60 L0
35. to the sample to be tested and stir gently Allow time for the electrode to stabilize When the reading becomes stable the X unstable measurement symbol will disappear 17 05 44 pH meter Cond H uA m 24 4 Titr ator e f the pH readings are less than 2 00 or greater than 16 00 pH the closest full scale value 2 00 pH or 16 00 pH will be displayed blinking If measurements are taken successively in different samples it is recommended to rinse the electrodes thoroughly with deionized water or distilled water and then with some of the next sample to prevent cross contamination pH measurements are affected by temperature In order to have accurate pH measurements the temperature effect must be compensated for To use the Automatic Temperature Compensation ATC feature connect and submerge the HI 7662 M temperature probe into the sample in the dedicated guide tube and wait for a few seconds The ATC message will be shown on the display Automatic Temperature Compensation will provide pH corrected values at the temperature of measurements If Manual Temperature Compensation MTC is desired the temperature probe must be disconnected from the instrument The default temperature of 25 C 77 F or the last temperature reading will be displayed preceded by the symbol and the MTC message The manually set temperature can now be adjusted with the ARROW keys from 20 0 to 120 0 C 1 07 16 pH meter Cond H G
36. trode calibration screen follow the next steps From pH meter screen press CAL funcion key then Electrode e From Titrator screen press CAL function key then Electrode The electrode calibration screen will be displayed Point 1 calibration e he 4 01 buffer will be selected by default If necessary press the ARROW keys in order to select a different buffer value Electrode Calibration x H 404 Buffer 1 4 01pH The unstable measurement symbol will be shown on the display until the reading becomes stable e When the reading is stable and dose to the selected buffer the unstable measurement symbol will disappear and the Confirm key will become active Electrode Calibration Electrode Calibration H 401 H 401 Buffer 1 4 01pH Buffer 1 4 0 1pPH Clear Clear MTC Confirm e Press Confirm to confirm the calibration e Press ESC to exit calibration Notes To dear a previous calibration and to return to the default value press Clear at any time after entering calibration mode The Calibration cleared message will be shown for a few seconds on the display If Clear is invoked during the first calibration point the instrument returns to the measurement mode e he Clear key is displayed only if a previous calibration exists Point 2 calibration e he calibrated value will be shown on the display and the second expected buffer value will be displayed
37. uld be recalibrated d Whenever the pH electrode is replaced b At least once a week c After testing aggressive chemicals and after electrode is cleaned d When high accuracy is required e If the pH calibration expired warning is displayed during measurement Every time you calibrate the instrument clean the electrode see the pH Cleaning Procedure section and use fresh buffers PROCEDURE A single two or three points calibration can be performed using the three predefined buffers 4 01 8 30 and 10 01 pH For a single point calibration any of the three butters may be used but using 4 01 pH is recommended Note The HI 84442 will not accept other pH buffers for calibration e Pour small quantities of selected buffer solutions into clean beakers For accurate calibration use two beakers for each buffer solution the first one for rinsing the electrode and the second one for calibration e Put a magnetic stir bar in each beaker with the calibration buffer solution e Remove the protective cap and rinse the electrodes with some of the buffer solution to be used for the first calibration point Open fill hole on electrode e Put the first beaker with calibration buffer in the beaker holder e Place the electrode holder on the top of the beaker and secure it by turning clockwise e Immerse the pH electrode and the temperature probe approximately 2 cm 0 8 into the buffer paying attention not to touch the stir bar To select Elec
Download Pdf Manuals
Related Search