HI 88713 - Hanna Instruments
Contents
1. Press to scroll down in a menu and help or to decrement a set value Press to log the current reading Press to access calibration menu O gt r E 2 r Press to recall the log Press to display the help screen HELP n m e c U Press to access the setup menu SPECIFICATIONS GENERAL TIPS FOR AN ACCURATE MEASUREMENT FNU mode The HI 88713 is a highly accurate bench too turbidity meter Special care must be taken during Range 0 00 to 9 99 10 0 to 99 9 100 to 1000 FNU calibration and sample preparation to optimize the instrument performance and to fully benefit from Resolution 0 01 0 1 1 FNU its features Is very important for the analyst to use proper measurement techniques for accurate Accuracy 2 of reading plus straylight precise and repeatable readings The instructions listed below should be carefully followed during FAU mode calibration and measurement to ensure optimum accuracy Range 10 0 to 99 9 100 to 4000 FAU Resolution 0 1 1 FAU GENERAL RULES Accuracy 10 of reading e Always put the instrument on a flat rugged surface when taking measurements NTU ratio mode e Do not operate in direct sunlight Range 0 00 to 9 99 10 0 to 22 2 100 to 4000 NTU e Keep the lid of the instrument closed when it is not used to prevent dust or dirt entering inside 0 00 to 7 29 10 0 to 99 7 100 to 780 EBC Always close the cuvette lid during measurement Resolution aL rat B e Always use cuvettes without2. aligned with the sign on the instrument top NORMAL MEASUREMENT This type of measurement is best suited for regular readings when the sample is stable and normal accuracy is required In normal mode the measurement takes about 10 seconds and the lamp is ON for a minimum period of time about 7 seconds 12 44 15 E READ e Press Read functional key to take the Lu measurement FHU Turbidity The display will show READ in the left side and blinking dashes The dashes and light icon will appear during different measurement phases 1 24 FHU i FHU Turbidit The result is displayed in the selected units CONTINUOUS MEASUREMENT This measurement mode is suitable when many measurements have to be taken in a short period of time The mode is useful to evaluate a very fast settling sample This measurement mode is recommended for indexing cuvettes Press Read functional key and keep it pressed to take continuous readings The display will show READ in the lett side and blinking dashes The dashes and light icon will appear during different measurement phases The first value is displayed after 10 seconds and then a new reading is displayed each second as long as the Read functional key is kept pressed When a new value is displayed the measurement value will briefly blink The last value remains on the display after the Read functional key is released AVERAGED MEASUREMENT This measurement mode is usetul whe
3. hours Date Format Mon DD Yr Y Italiana Espanol Setup cie late Format Mon DD YYY Language Enalish Beeper Beeper Option Enabled or Disabled This option is used to enable disable the beeper Press the Enable functional key to enable or E elup disable this option Language English Tutorial When enabled a short beep is heard every time a keii d Instrument ID Qu ey IS pressed A long beep alert sounds when the pressed key is not active or an error condition is detected Instrument ID Option 0 to 9999 This option is used to set the instrument s ID identification number The instrument ID is used while exchanging data with a PC Press Modify functional key to access the 0002 instrument ID screen Press the UP or DOWN key in order to set the desired value Press Accept ELEC functional key to confirm the value or ESC to return to the setup menu without saving the new value Instrument ID Meter information Press Select funcional key to view the Instrument Meter Information Model HIB8713 model firmware version language version and Serial Ru instrument serial number Firmware w 1a b04 Language 1 0 Press ESC to return to the Setup mode wa hannainst com PC INTERFACE Log data download from the instrument to the PC can be done with the HI 92000 Windows compatible software optional HI 92000 also offers graphing and on line help features Data can be exported to the mos
4. increase the bubbles in the sample ADDITION OF SURFACTANT Surtactant changes the surface tension of the water This causes the bubbles to be released from the sample This method is effective for samples that are supersaturated with air The procedure consists in the addition of a drop of surtactant in the cuvette before adding the sample to be analyzed A common surfactant used for degassing is Triton X 100 Warning Changing the surface tension will cause a rapid settling of particles that cause turbidity To avoid this problem analyze the sample as soon as possible Do not shake the sample vigorously because the surfactant may foam Always rinse the cuvette betore adding a new sample to avoid surtactant accumulation Surtactant contribution to the turbidity readings is negligible Note Surfactant addition should be used for degassing only when other methods are ineffective USE OF AN ULTRASONIC BATH The ultrasonic waves are very effective in removing air bubbles trom samples However ultrasonic waves should be used with care because they can alter the samples turbidity characteristics by moditying the shape and size of particles which cause turbidity The ultrasonic waves can also break the existing air bubbles leading to a complication in the degassing process In order to avoid excess application of the ultrasonic waves use the ultrasonic bath until all visible air bubbles are removed and then measure the turbidity This is t
5. 2607 Backlight Contrast Date Time This option is used to set the instrument s date and time Press Modify to change the date time Press Left or Right functional key to highlight the value to be modified year month day hour minute or second Use the UP or DOWN key to change the value Press Accept functional key to confirm the new value or ESC to return to the setup without saving the new time or date Time format Option AM PM or 24 hours Press the AM PM functional key to select the new value Date format Press Modify functional key to change the Date Format Use the UP or DOWN key to select the desired format Press Accept functional key to confirm the value or ESC to return to the setup menu without saving the new format Language Option English Italiano or Espa ol Press the corresponding function key to change the Option If the new selected language cannot be loaded the previously selected language will be reloaded Tutorial Option Enabled or Disabled This option is used to enable disable tutorial mode If enabled this option will provide the user short guides on the screen Press the Enable functional key to select this option 29 Date Time cie Han DD YYYY a B 05 2007 i 04 11 47 PH Average Date Time Time Format Date Format late Time Time Format Date Format Date Format OY ANS DD Hon DD YYYY DD Hon i 1 Y Time Format 24
6. 5 0 FNU Point 2 100 0 Fau FHU Turbidity FAU Turbidity Calibration Calibration Point 2 15 0 HTU Point 2 15 0 HTU HTU Ratio Turbidity HTU Hon ratia Turbidity Note If necessary press UP or DOWN key to edit each calibration point value to match the exact value of the standard as measured with a reference turbidimeter e Close the lid and press Read functional key The display will show the value blinking and the light icon during measurement e At the end of the measurement the third proposed calibration point is displayed e Atthis moment it is possible to exit calibration by pressing End functional key 22 e f the calibration is terminated the display will briefly Calibration show Store and the two point calibration is saved The instrument returns to the main screen THIRD CALIBRATION POINT e Remove the second standard cuvette e Place the cuvette for third calibration point e 100 FNU NTU calibration cuvette for NTU ratiometric mode e 100 NTU formazin prepared standard for NTU non ratio and FNU modes e 750 NTU formazin prepared standard for FAU mode Calibration Calibration root HOD Rs pone ZID au FHU Turbidity FAU Turbidity End Fead Calibration Calibration s LDO ru fone 1000 Rr HTU Ratio Turbidity MTU Hon ratia Turbidity Note If necessary press UP or DOWN key to edit each calibration point value to match the exact value of the standard as measured with a r
7. 739 3014 Fax 886 2 2739 2983 Thailand Tel 662 619 0708 Fax 662 619 0061 2 C1 CO United Kingdom 6o Sj Tel 01525 850 855 Fox 01525 853 668 z USA Tel 401 765 7500 Fax 401 765 7575 For e mail contacts and a complete list of Sales and Technical offices please see www hannainst com
8. Instruction Manual HI 88713 ISO Turbidity Meter AB IAS HANNA B instruments www hannainst com Dear Customer Thank you for choosing a Hanna Instruments product This manual will provide you with the necessary information for correct use of the instrument Please read this instruction manual caretully before using the instrument If you need additional technical information do not hesitate to e mail us at tech hannainst com or see the back side of this manual for our worldwide sales and technical service contacts This instrument is in compliance with C directives TABLE OF CONTENTS giai ANNE ION Re eteiqnaatiaieis 3 iss etg M 3 ABBREVIATIONS cesaynesigeveneraszesseisiessocerassvact susdesons grees cuePieetarhchavoastcenensavdtbantseenanereea pees aapsrenatiyeenioad 4 PRINCIPLE OF OPERATION sesenta 1 FUNCTIONAL DESCRIPTION seen 6 vii o S E E 8 GENERAL TIPS FOR AN ACCURATE MEASUREMENT sese 9 J a 15 RANGE SELECTION 16 Ui ADULT e Ee 16 jugi 17 MEASUREMENT PROCEDURE eeeeenennnnttennnntnnnnnnnnnnnnnntnnnnnnnnnnntnnnnnnnnnnnnn 17 CALIBRATION PROCEDURE ssccssssssesssssesssosessssssessecasersscsssereses
9. TU value is higher than 4000 FNU NTU 980 EBC Qut of range the display will show the maximum value blinking em and the message Out of range on the message line 17 42 03 UNITS CHANGE only for NTU Ratio and NTU Non Ratio modes To change the units for NTU Ratio and Non Ratio modes simply press the Unit functional key when a measurement is available The EBC value is obtained by multiply with 0 245 the NTU value 9 07 rv 144 enc HTU Ratio Turbidity HTU Ratio Turbidity CALIBRATION PROCEDURE The HI 88713 Turbidity bench meter is supplied with 5 AMCO Hanna standards lt 0 1 FNU 15 FNU 100 FNU 750 FNU and 2000 NTU that are specially designed for NTU ratio mode The calibration can be done using the supplied calibration solutions for NTU Ratio mode or user prepared standards for all modes Turbidity standards have a shelf life and should not be used after the expiration date Alternatively formazin standards can be used It is recommended that the turbidity value of the prepared calibration solutions to be close to the default calibration points The first calibration point should be near 0 FNU the second point can be chosen between 10 and 20 FNU the third point between 50 and 150 FNU the fourth point between 600 and 900 FNU and the fifth point between 1500 and 2500 NTU FORMAZIN PREPARATION In order to prepare formazin 4000 NTU stock solution follow the next procedure Solution Dissolve 1 000 gram of hydrazine
10. alter turbidity readings The silicone oil has the same refractive index as the glass and will not alter the turbidity readings It is important to apply only a thin layer of silicone oil Warning Do not apply silicone oil in excess because it may retain dirt or contaminate the cuvette holder of the instrument altering the turbidity readings It is very important to apply the silicone oil on a clean dry cuvette Apply a few drops of oil and wipe the cuvette thoroughly with a lint free cloth Wipe off the excess oil till you obtain a thin uniform layer If the procedure is correctly followed the cuvette should appear nearly dry with no visible oil Note The supplied cloth for oiling should be stored together with the silicone oil bottle and cuvettes taking care to avoid contamination with dirt After a few oiling procedures the cloth will contain enough oil to wipe the bottle with it without adding more oil From time to time add some drops of oil on the cuvette to provide the necessary oil quantity in the cloth INDEXING A CUVETTE It is very important for low turbidity readings to always insert the cuvette into the instrument in the same position All cuvettes are factory indexed The factory mark on the cuvette can be used to align the cuvette with sign on the cuvette holder 10 To further reduce the effect of glass imperfections the cuvette can be indexed and use this new index as the position mark For indexing one cuvette or mat
11. ching multiple cuvettes the continuous reading mode is suggested In this mode multiple successive readings are taken without turning otf the lamp The turbidity is immediately displayed reducing considerably the measurement time Note The instrument can not perform continuous readings if the average mode is on In order to index a cuvette follow the next steps A DN e Fill the cuvette with high quality water lt 0 1 S U FNU up to the 10 mL mark lean and oil the cuvette as described in the previous section Turn the instrument ON Insert the cuvette into the instrument and press Read functional key Record the reading Open the instrument lid slightly rotate the cu vette and take a new reading Repeat the previous step until you read the lowest value Alternatively press and hold the Read key to make continuous readings After the first value is displayed open the lid and start rotating the cuvette until the lowest value is displayed 1 e Mark this position on the white band at the top of the cuvette with a water resistant pencil e Always use this position to align the cuvette with the mark on the cuvette holder MATCHING MULTIPLE CUVETTES Precise measurements require the use of a single cuvette If it is not possible cuvette selection and matching must be performed before taking measurements In order to match multiple cuvettes follow the next steps A e Fill multiple cuvettes with high qualit
12. confirms that the requested operation was done ler Tutorial mode is enabled To go to Ehe main screen press Continue HTU Ratio Turbidity Continue To disable this mode when in the main screen press the SETUP key to enter the setup and then DDMA ey press DOWN key until the Tutorial line is E highlighted Press the Disable key then press ESC to return to the main screen The HI 88713 bench top Turbidity meter offers an interactive contextual help that assists the user at any moment To access help screens just press HELP A screen with additional information will appear To read all available intormation scroll down or up text using the UP or DOWN key Press the Support key to access a list of the Hanna support centers and their contact information Press the Accessories key to view a list of the instruments accessoies To exit support or accessories screens press ESC and the instrument will return to the previous help screen To exit help mode just press the HELP key again and the meter will display the previous screen 3 To read sample gently mix Ji the cuwet insert in Ehe Instrument and press Read To change the units press Support Support Malaysia Tel 603 5635 9940 Fax 603 5635 9529 Singapore Tel 5235 7118 Meter Accessories T xxx REAGENT SETS xxx HI337 03 58 Silicon oil 15 mL Hi887 13 11 Calibration set Far MEASUREMENT PROCEDURE When taking turbidi
13. de guides the user step by step through the analysis process The HI 88713 features a logging function that can hold up to 200 measurements in the internal memory Data can be viewed directly on the screen or it can be downloaded to a PC for further analysis using the H9200 Windows compatible software ABBREVIATIONS NTU Nephelometric Turbidity Units LCD Liquid Crystal Display FAU Formazin Attenuation Units RTC Real Time Clock FNU Formazin Nephelometric Units RH Relative Humidity ISO International Organization for Identification Standardization EBC European Brewery Comitee PRINCIPLE OF OPERATION Turbidity is the optical property that causes light to be scattered and absorbed rather than transmitted The scattering of the light as it passes through a liquid is caused by the suspended solids The higher the turbidity the greater the amount of scattered light The molecules in a very pure fluid scatter light to a certain degree no solution will have zero turbidity The ISO 7027 Method specities the key parameters for the optical system and the method to measure the turbidity of water The HI 88713 Turbidity bench meter is designed to meet or exceed the criteria specified by the ISO 7027 DIN 38404 and NF EN 27027 The light beam that passes through the sample is scattered in all directions The intensity and pattern of the scattered light is affected by many variables including the wavelenght of the incident light particle size and s
14. ed or prepare a fresh standard if formazine is used and repeat the reading of the standard mu If the calculated calibration coefficients are outside a calibration certain range a calibration error message is displayed cA Warning Calibration error Skip Fead OUT CAL RANGE FUNCTION The instrument has a mechanism to prevent taking measurements in a range where the calibration 706 does not assure the best results The message Duk oteaan range Out of Calibration Range is displayed on the message line in the following situations e When the first calibration point is over 0 15 FNU and the reading is under 10 FNU e When two point calibration was performed and the reading value is over 40 FNU e When a three point calibration was performed and the reading is over 150 of the the third point value e When a four point calibration was performed and the reading is over 200 of the the fourth point value 2 GOOD LABORATORY PRACTICE GLP The HI 88713 Turbidity bench meter has a built in complete GLP information The calibration date and the calibration points are displayed in a comprehensive mode for each range To display the GLP information simply press CAL key A screen with instrument serial number and with information about the calibration is displayed For further information press the GLP functional key The GLP contains e Instrument serial number e The last user calibration date in Calibrati
15. een e The fifth proposed calibration point 2000 NTU for NTU Ratio mode is displayed e At this moment it is possible to exit calibration by pressing End functional key e f the calibration is terminated the display will Calibration briefly show Store and the four point calibration is saved The instrument returns in the main screen FIFTH CALIBRATION POINT NTU Ratio Turbidity only e Remove the fourth standard cuvette e Place the 2000 NTU calibration cuvette or the fifth prepared formazin standard into the holder with the cuvette mark aligned to the sign on the instrument top Calibration Point 5 2000 NTU HTU Ratio Turbidity 24 Note If necessary press UP or DOWN key to edit the calibration point value to match the exact value of the standard as measured with a reference turbidimeter e lose the lid and press Read functional key The display will show the value blinking and the light icon during measurement e At the end of the measurement the calibration is saved and the display will briefly show Store store The instrument returns in the main screen Calibration CALIBRATION ERROR MESSAGES If the value of the standard read during the calibration is too far from the set value the instrument will display a standard low or a standard high message Calibration Calibration e Warning cN Warning Standard too low Standard too high Check if the correct standard is us
16. eference turbidimeter e lose the lid and press Read functional key The display will show the value blinking and the light icon during measurement e At the end of the measurement the fourth proposed calibration point is displayed e At this moment it is possible to exit calibration by pressing End functional key e fthe calibration is terminated the display will briefly Calibration show Store and the three point calibration is saved The instrument returns in the main screen is Store 23 FOUR POINT CALIBRATION e Remove the third standard cuvette e Place the cuvette for third calibration point e 750 FNU NTU calibration cuvette for NTU ratio mode e 750 NTU formazin prepared standard for NTU non ratio and FNU modes e 2000 NTU formazin prepared standard for FAU mode Calibration Calibration pone Fiu us 2000 Fou FHU Turbidity FRU Turbidity Calibration Calibration Point 4 750 HTU Point 4 750 HTU MTU Ratio Turbidity MTU Hon ratia Turbidity Note If necessary press UP or DOWN key to edit each calibration point value to match the exact value of the standard as measured with a reference turbidimeter lose the lid and press Read functional key The display will show the value blinking and the light icon during measurement e The Store message is displayed for FAU FNU and NTU non ratio modes and the calibration is saved The instrument returns to the main scr
17. ent is completed e A measurement can be saved only once LOG SAVE L z To log a record simply press LOG key after the eee pne r measurement is completed A record number is ifhluru assigned to each logged measurement Each NTU Ratio Turbidity reading can be stored only once LOG RECALL The log can be consulted at any time by simply pressing RCL key Log Recall To exit log consulting press RCL key again 00s 0671172007 14 56 The log content is displayed one record at a time Fdw HTU Ratio Turbidity starting with the most recent one The information helete T Umit T Delai regarding one record is displayed in one screen To browse the log press the UP or DOWN key LOG DELETE The last log or all logs can be deleted To delete the last log simply press Delete functional key when the last log is displayed The log will be deleted and the next log is immediately displayed To delete all logs press DelAll functional key A contirmation screen is displayed Press CFM functional key to confirm the action The log will be deleted and the instrument returns in the main screen Note The records for all parameters are deleted when this action is performed Log Delete Delete all records 2 The instrument s parameters can be changed in the Setup mode Some parameters affett the measuring sequence and others are general parameters that change the behaviour or appearence of the instrume
18. hape refractive index and color The optical system of the HI 88713 turbidity bench meter uses an IR LED a scattered light detector 90 and a transmitted light detector 180 LENS R LED cuver TRANSMITTED LIGHT EMITTED LIGHT gt a gt ac gt put SCATTERED LIGHT DETECTOR For the ratio turbidity mode the microprocessor of the instrument calculates the NTU value from the signals that reaches the two detectors by using an effective algorithm The optical system and measuring technique compensate the color interference and also the LED intensity fluctuations minimizing the need of frequent calibration For the FNU and NTU non ratio modes the turbidity is calculated from the signal that reaches the scattered light detector 90 In FAU mode the turbidity is calculated from the signal that reaches the direct light detector while in NTU ratio mode the turbidity is obtained from signal ratio on scatter and transmitted light detectors The non ratio methods are more sensitive to the LED intensity fluctuations The lower detection limit of a turbidimeter is determined by the stray light Stray light is the light that reaches the detectors and is not caused by light scattering trom suspended particles The optical system of HI 88713 instrument is designed to have very low stray light providing accurate results for low turbidity samples However special care must be taken when measuring low turbidities see page 9 General Tip
19. he most used procedure for degassing If you are not sure that all air bubbles were removed apply ultrasonic waves again for a short period of time and then measure the turbidity Repeat this procedure until the turbidity is increasing instead of decreasing sign that turbidity of the sample was altered In order to degas a sample fill a clean cuvette with sample and immerse it 1 2 to 2 3 immersed in an ultrasonic bath Follow the degassing procedure described above Only after the degassing procedure is finished the cuvette can be capped 14 HEATING THE SAMPLE This procedure can be very effective however it should be handled with care because it can alter the turbidity of the sample When heating a sample the volatile components trom the sample can vaporize the suspended components can dissolve or the sample characteristics can change The heating procedure should be used with extreme care Use a warm water bath and immerse the cuvette filled with sample into the bath Heat the sample only until the visible bubbles are removed Note Always cool the heated sample to the original temperature before measurement The heating procedure can be used in combination with vacuum or ultrasonic waves application for a more effective air bubble removal STARTUP The HI 88713 Turbidity bench meter is supplied with all necessary accesories Unpack the instrument and place it on a flat surface Do not place the instrument in dirrect sunlight Inse
20. ich guarantees accurate results assures long term stability and minimizes stray light and color interferences It also compensates for variations in intensity of the LED making no need for frequent calibration The 25 mm round cuvettes made from special optical glass guaranties reproductibility and consistency of the measurements Turbidity measurements can be made in four modes FNU Formazin Nephelometric Units ratio mode FAU Formazin Attenuation Units NTU Nephelometric Turbidity Units NTU non ratio mode Alternative EBC European Brewery Comitee measuring units are available wen measuring in NTU modes Normal measurement continuous measurement or signal averaging measurement can be selected depending on the sample and desired accuracy A two three four or five point calibration can be performed by using the supplied lt 0 1 15 100 750 FNU and 2000 NTU standards user prepared formar in standards can also be used in all modes Calibration points can be modified when they are used The HI 88713 Turbidity bench meter features G L P Good Laboratory Practice functions that allow traceability of the calibration conditions The last calibration points as well as time and date The HI 88713 Turbidity bench meter has a user friendly interface with an easy to understand graphical LCD Comprehensive contextual help is available at a simple key press All messages and help screens are available in several languages Furthermore a tutorial mo
21. n samples that cause unstable readings are analyzed By averaging several readings noise etfect is reduced and accurate measurements can be taken This mode can also be selected when high accuracy measurements are needed In the average mode 10 measurements are averaged in a short period of time about 20 seconds To use the averaged reading mode first enter setup and enable the Average reading mode The AVG text will be displayed in the lett side of the screen 17 17 28 e Press Read functional key to take the AVG aan e measurement FHU Turbidity The display will show READ in the left side and blinking dashes The dashes and light icon will appear during ditferent measurement phases The first value is displayed after 10 seconds and then a pyu new average of the available readings is displayed F U Turbidity each second When a new value is displayed the measurement value will blink briefly The last averaged l value remains on the display at the end of the measurement L93 Aue 17 17 35 tz FHU Turbidity The HI 88713 Turbidity bench meter automatically selects the correct turbidity range to display the results with the highest accuracy In FNU and NTU AVG Non Ratio Turbidity Modes if the measured value ul of 1 000 i is higher than 1000 FAU the display will show the maximum value blinking and the message Out of range on the message line For FAU Turbidity and NTU Ratio Turbidity modes if the measured i 4000 N
22. nt The setup mode may be accessed trom the main screen by pressing the SETUP key Press ESC or SETUP to return to the main screen Alist of setup parameters will be displayed with currently configured setting Press HELP for aditional information Press the UP or DOWN key to select the parameter and depending to the parameter type select the new value as follows Backlight Values 0 to 8 Press Modify functional key to access the backlight value Use the Right or Left functional key alternatively the UP or DOWN key to increase or decrease the display backlight Press Accept functional key to confirm or ESC to return to the setup menu without saving the new value Contrast Values 0 to 20 This option is used to set the display s contrast Press Modify functional key to change the display s contrast Use the Right or Left functional key alternatively the UP or DOWN key to increase or decrease the value Press Accept funcional key to confirm the value or ESC to return to the setup menu without saving the new value Average Option Enabled or Disabled This option is used to enable disable averaged measuring mode If enabled the instrument takes 10 readings and display the resulting average value The partial average is displayed during measurement Press the Enable functional key to enable or disable this Option 28 Setup Contrast 11 Average O late Time 1E
23. on selected format and time in hh mm format If no TETERE calibration was performed the Not calibrated ar ea message is displayed and the meter uses only the HTU Ratio Turbidity factory calibration e Parameter as NTU Ratio Turbidity NTU Non Ratio Turbidity FAU Turbidity or FNU Turbidity The value of each calibration point up to alPoint 4 5 points for NTU ratio mode 4 points for FNU FAU and NTU non ratio modes If the first calibration point was skipped the 0 00 value is displayed RESTORE FACTORY CALIBRATION To restore the factory calibration for the currently Calibration SH 88r 13xxxxxx selected range press CAL key when in the main css ae reen The first screen for the GLP is displayed ee dde scree play MTU Ratio Turbidity Press Delete functional key to initiate the Cal T GLP T Delete calibration delete procedure and then press CFM functional key to delete the user calibration and restore the Factory calibration Note Only the user calibration for the current HTU Ratio Turbidity selected range is deleted Calibration Delete Delete user calibration 26 LOG AND LOG RECALL The HI 88713 Turbidity bench meter has a powerful log function that could store up to 200 records Each record contains e the measuring mode e the reading value e the measuring unit e the date and time of the measurement e the current log number Notes The log can be saved only after a measurem
24. on Calibration can be performed in up to five points independently for each mode The calibration points are FNU mode 0 15 100 750 FNU FAU mode 15 100 750 2000 FAU NTU ratiometric mode 0 15 100 750 2000 NTU NTU non ratiometric mode 0 15 100 750 NTU Before making the calibration assure that you are in the correct mode To enter calibration press CAL key while in main screen The first screen of GLP information is displayed Press Cal functional key to start calibration It is possible to interupt calibration procedure at any time by pressing CAL or ESC key Calibration SH 887 13002GAr User Cal date time 1311172007 18 35 FHU Turbidity Cal OLP Delete Calibration SH 8871300265HR7 User Cal date time 1371172007 18 40 HTU Ratio Turbidity Lal GLP Delete _ FIRST POINT CALIBRATION e The first calibration point is displayed on the LCD Calibration Point 1 0 00 FHU FHU Turbidity Skip Fead Calibration Point 1 0 00 HTU MTU Ratio Turbidity EET ae Calibration SH 887 13002GA User Cal datetime 13 11 2007 18 38 FAU Turbidity Cal GLP Delete Calibration SH 887130 z6H7 User Cal date amp time 15 11 2007 09 52 HTU Han ratia Turbidity Cal OLP Delete Calibration Foint 1 15 0 FAU FRU Turbidity Calibration Point 1 0 00 HTU HTU Hon ratio Turbidity E This point is used for FNU and NTU modes to check the quality of the water used for dil
25. repaid 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 RECOMMENDATIONS FOR USERS Before using this product make sure that it is entirely suitable for your specific application and for the environment in which it is used Operation of this instrument may cause unacceptable interferences to other electronic equipments requiring the user to follow all necessary steps to correct interferences Any variation introduced by the user to the supplied equipment may degrade the instrument s EMC performance To avoid damage or burns do not put the instrument in microwave ovens For your own and the instrument satety do not use or store the instrument in hazardous environments 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 Fax 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 2
26. rt the 12 Vdc power plug into its input on the back of the instrument Switch on the instrument On the LCD the Hanna Logo will appear for a short time followed by the main screen for turbidity measurements Miilrstvumens Instruments 12 53 01 PH HTU HTU Ratio Turbidity Umit Read The instrument loads the selected language If no language can be loaded the instrument will work in the safe mode In safe mode all the messages are displayed in English and tutorial and help information are not available RANGE SELECTION The HI 88713 bench top Turbidity meter has four measuring modes FNU FAU NTU Ratio and NTU Non Ratio When the instrument is in the main FRU Turbidity screen the selected mode is displayed in the right MTU Ratio Turbidity HTU Han ratia Turbidity side of the LCD on the message line To change the mode press the RANGE key When the display shows the Change mode screen use the UP or DOWN key to select a new mode Press CFM key to select the new mode The instrument returns to the main screen TUTORIAL MODE The HI 88713 bench top Turbidity meter has a unique Tutorial Mode that provides additional information to help the unexperienced user during the measurements The instrument displays a screen with explanations and confirmation button when a preparation or other operation has to be performed by the operator The instrument resumes the measuring sequence when the operator
27. s for an Accurate Measurement for sample preparation and measuring techniques MEASUREMENT UNITS The meter is using specific units according to the selected measurement mode For NTU modes the EBC unit option is available 1 EBC 0 245 NTU When measuring in NTU modes a conversion to EBC units is also available 0 245 NTU 1 EBC FUNCTIONAL DESCRIPTION INSTRUMENT DESCRIPTION HI 88713 ISO Turbidimeter H HANNA D35316 1M X FHU FAW Turbidity X ABE ba uin BU Liquid Crystal Display LCD The LCD has backlight for better visibility in dark environments Keypad Splash proof resistant Cuvette Lid USB connector 12 Vdc power input ON OFF switch o WT Aa o N ass aa es DISPLAY DESCRIPTION The display contains the following fields 13 31 06 1 Current time 2 Functional keys 3 Selected mode 4 Measuring units 5 Measured value KEYPAD DESCRIPTION The keypad contains 8 direct keys and 3 functional keys with the following functions Press to perform the function displayed above it The function are screen releated Press to exit the current screen m S i Press to access measurement modes Press fo scroll up in a menu and help or to increment a set value
28. scratches or cracks because they can cause inaccurate readings dmi 205 of re dadea Always cap the cuvettes to prevent the sample from spilling To prevent contamination of the optical system do not use to much oil SE reae conve eX NE When using multiple cuvettes they should be indexed and matched when possible NTU non ratio mode Range 0 00 to 9 99 10 0 to 99 9 100 to 1000 NTU CUVETTE 0 00 to 9 99 10 0 to 99 9 100 to 245 EBC Resolution 0 01 0 1 1 NTU The cuvette is part of the optical system in all measurements The light reaches the sample by 0 01 0 1 1 EBC passing through the cuvette glass As a result the measurement can be affected by the glass Accuracy 2 of reading plus straylight imperfections dirt dust scratches or fingerprints present on the cuvette surtace Special care Range selection Automatic must be taken in preparing and handling the cuvette Repeatibility 1 of reading or straylight whichever is greater Note If you are using multiple cuvettes always match the cuvettes Stray Light lt 0 1 NTU 0 05 EBC Light Detector Silicon Photocell Method ISO 7027 Method Rid Measuring mode Normal Average Continuous The cuvettes should be free of scratches or cracks Any cuvette with visible scratches should be Turbidity Standards 0 1 15 100 750 FNU and 2000 NTU discarded The cuvettes should be periodically washed with acid Atter washing the cuvettes Calibration Two three four or five point calibration
29. seesssssssenaseesenansesseasesesrsssesenoserssnosiseesnosssss 20 GOOD LABORATORY PRACTICE GUP T Oe Ea 26 RFS TORE EACIORY CADIBRATIUM suscite tetti atu Gir tq pd hn sedaan 26 Ju CRIME T 27 jj 28 G8 Te a q 30 fx d 3l i011 e 3l RECOMMENDATIONS FOR USERS cutcctiesptdtierit oderit ER RUM LUDERE UO UE Ere ERU e EE 3l PRELIMINARY EXAMINATION Please examine this Product carefully Make sure the instrument is not damaged If any damage has occurred during the shipment please notify your dealer This HI 88713 Turbidity bench meter is supplied complete with e Six Sample Cuvettes and Caps e Calibration Cuvettes Silicone Oil e loth for wiping the cuvettes e AC DC power adapter e Instruction Manual e Instrument Quality Certificate Note Save all packing material until you are sure that the instrument works correctly Any defective item must be returned in the original packing with the supplied accessories GENERAL DESCRIPTION The HI 88713 Turbidity bench meter is a high accuracy meter that benefits from Hanna s years of experience as manufacturer of analytical instruments The HI 88713 Turbidity bench meter meets and exceeds the requirements of ISO 7027 standard The instrument is based on a state of the art optical system wh
30. should be rinsed well with distilled or deionized water multiple times Allow cuvettes to air dry Light Source IR LED and store them for long periods of time with theire caps to avoid dirt entering inside Always Lamp life Instrument lite handle the cuvette by touching only the cap or its top side over the horizontal line Display 40 x 70mm graphic LCD 64x128 pixels with backlight Always store the cuvettes in separate boxes or with separators between them to avoid scratches LOG Memory 200 records on the surface Serial Interface USB Environment 0 C 32 F to 50 C 122 F max 95 RH non condensing CUVETTE PREPARATION Power supply 12 Vdc power input Whenever a cuvette is used it must be clean inside and outside When it is placed into the Dimensions 230 x 200 x 145 mm 9 x 7 9 x 5 7 LxWxH instrument it must be dry outside completely free of fingerprints or dirt Weight 2 5 Kg 88 oz CUVETTE PREPARATION Whenever a cuvette is used it must be dean inside and outside When it is placed into the instrument it must be dry outside completely free of fingerprints or dirt If the cuvette is not indexed use the factory marking to align the cuvette with the marking on the cuvette holder CUVETTE OILING To hide minor imperfections and scratches the cuvettes should be oiled outside with the supplied silicone oil This is very important especially for low turbidity samples lt 1 FNU otherwise scratches can contribute and
31. sulfate NH2 2 H2504 in distilled deionized water and dilute to 100 mL in a volumetric flask Warning Handle hydrazine sulfate with care because it is a carcinogen reagent Avoid inhalation ingestion or skin contact Formazin solution can also contain some hydrazine traces Solution Il Dissolve 10 000 grams of hexamethylenetetramine CH2 N in distilled deionized water and dilute to 100 mL in a volumetric flask Stock solution Mix 10 mL Solution and 10 mL Solution II in a flask Let the stock solution stays 48 hours at 25 3 C 77 5 F This will result in a 4000 NTU formazin suspension It is very important for the formation of the formazin polymer to maintain the same temperature The stock solution 4000 NTU can be stored up to one year in proper conditions Store formazin in amber glass bottle or any UV light blocking bottle To obtain a high quality formazin always use pure reagents and high purity water To prepare the calibration standards dilute the stock solution with the same high purity water you used for the preparation of the stock solution The diluted formazin solutions are not stable They should be used immediately after preparation and discard immediately after use 20 CALIBRATION For best results the measurement techniques must be followed during calibration If formazin standards are used mix the cuvettes gently for about minute and then allow the standard to settle for more minute before calibrati
32. suring a non uniform source collect samples trom different places and mix them When measuring the collected sample keep in mind the following e Samples should be analyzed immediately after collection because the turbidity can change in time e To avoid dilution of the sample it is better to rinse the cuvette with a quantity of sample and then discard Then you can fill the cuvette with sample e Pay attention that cold samples do not condense on the sample cell REMOVING AIR BUBBLES Any air bubbles present in the sample will cause high turbidity readings To obtain accurate measurements remove the air bubbles using one of these methods e Application of a partial vacuum e Addition of a surfactant such as Triton X 100 13 e Use of an ultrasonic bath Heating the sample Sometimes it is necessary to combine two or more methods for efficient air bubble removal Note Each method can alter the sample turbidity if misused so they have to be used with caution APPLICATION OF VACUUM Vacuum works by decreasing the atmospheric pressure The bubbles trom the solution come out to the surface Application of vacuum is a very simple procedure andany vacuum can be used The simplest equipment is a syringe and a rubber stopper Notes Pay attention that the vacuum equipment be dean and oil free e t is not recommended to apply vacuum to a viscous sample that contains volatile components The vacuum can disrupt the volatile components and
33. t popular spreadsheet programs for further analysis To connect your instrument to a PC use a standard USB cable Make sure that your instrument is switched off Plug one connector to the instrument s USB socket and the other to the USB port of your PC Please reffer to the HI 92000 software to download the data from the instrument 30 REAGENT SETS HI 93703 58 Silicon oil 15 ml HI 88713 11 Calibration set for turbidimeter 0 1 15 100 750 FNU and 2000 NTU OTHER ACCESSORIES HI 731318 Tissue for wiping cuvetets 4 pcs HI 731331 Glass cuvettes 4 pcs HI 731335N Caps for cuvettes 4 pcs HI 92000 Windows compatible software HI 93703 50 Cuvettes cleaning solution 230 ml WARRANTY HI 88713 is warranted 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 to 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 If 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 p
34. ty measurements several basic rules should be followed e Always use cuvettes without scratches or cracks because they can cause inaccurate readings e Always cap the cuvettes to prevent spillage of the sample from spilling the instrument e Always close the cuvette cover during measurement e To prevent contamination of the optical system do not use too mush silicon oil To take turbidity measurements e Turn the instrument ON by pressing ON OFF When dashes are displayed on the LCD the instrument is ready The current time appears in the upper left corner of the display and the mode name appears on the right side of the LCD in the message line e Fill a dean dry cuvette with 10 mL of sample up to the mark only handle the cuvette by the top 3 34 13 FHU FRU Turbidity e Replace the cap e Wipe the cuvette thoroughly with a lint free cloth to remove any fingerprints dirt or water spots Apply silicone oil on the cuvette and wipe with a lint free cloth to obtain an even film over the entire surface of the cuvette Note It is very important to oil the cuvette espe cially for low turbidity values lt 1 FNU to hide the glass imperfections which can influence the reading e Place the cuvette into the instrument Align the mark from the cuvette with the sign on the instrument top e lose the lid Note If you have a cuvette with indexing mark place the cuvette into the instrument with the indexing mark
35. ution and to confirm that the optical system is not dirty In this case if the value of the first point is over 0 15 FNU NTU a warning Cal Pointl high is displayed when the calibration is saved and a warning Out of calibration range is displayed when measurements under 10 0 FNU NTU are performed 2 Note The reading of the first point could be skipped for FNU and NTU modes by pressing Skip functional key In this case the 0 00 value will be used for calibration e Place the cuvette for first calibration point e 1 FNU NTU calibration cuvette for all modes except FAU mode e 15 NTU formazin prepared standard for FAU mode Note For the FAU mode if necessary press UP or DOWN key to edit the calibration point value to match the exact value of the standard e lose the lid and press Read functional key The display will show the value blinking and the light icon during measurement Note If the Average mode was previously selected the measurement in calibration mode will be done using the average e At the end of the measurement the second proposed calibration point is displayed SECOND POINT CALIBRATION e Remove the first calibration cuvette e Place the cuvette for second calibration point e 15 NTU FNU calibration cuvette for NTU ratiometric mode e 15 NTU formazin prepared standard for NTU non rating and FNU modes e 100 NTU formazin prepared standard for FAU mode Calibration Calibration Point 2 1
36. y water 0 1FNU up to the 10 mL mark e lean and oil the cuvettes as described before e Turn the instrument ON e Insert the first cuvette into the instrument and press Read functional key Record the reading e pen the instrument lid slightly rotate the cuvette and take a new reading e Repeat the previous step until you read the lowest value e Mark this position on the white band at the top of the cuvette with a water resistant pencil Insert the second cuvette into the instrument and take a reading Open the instrument lid slightly rotate the cuvette and take a new reading e Repeat the last step for the second cuvette until the reading is within 0 01 FNU of the value obtained for the first cuvette e Alternatively press and hold the Read functional key after the first value is displayed open the lid and start rotating the cuvette until the read value matches the first cuvette e Mark this position on the second cuvette with a water resistant pencil e Follow the same procedure for all the cuvettes you need Note If the cuvette is indexed use the index to position it in the instrument SAMPLING TECHNIQUE When taking turbidity measurements it is very important to select a representative sample For consistent results follow the next tips when sampling e Gently mix the water before taking the sample e f the sample is taken from a pipe discard the first few liters e f mea
Download Pdf Manuals
Related Search