Instruction Manual - Oakton Instruments
Contents
1. Order Code Waterproof TN 100 T 100 portable turbidimeter EC TN100 with set of 4 calibration standards 800 100 20 0 amp 0 02 NTU set of 3 sample vials lint free cloth silicone oil batteries all in a rugged carrying Calibration Set for normal operation includes 800 ECTN100CALKT 100 20 0 amp 0 02 NTU Standards Sample Vials pack of 3 vials ECTN100CUVKT Silicone Oil 10ml ECSILICONEOIL Oakton Instruments Order Code 35635 00 35635 50 35653 55 To order any accessory or replacement part please contact the nearest distributor or Eutech Instruments Oakton Instruments 17 Instruction Manual 7 Specifications Parameter Measurement Method Automatic Range Selection Resolution Repeatability TN 100 T 100 Specification ISO 7027 compliant nephelometric method 90 0 to 1000 NTU 0 01 19 99 NTU 20 0 99 9 NTU APO IM 0 1 NTU 20 99 9 NTU 1 NTU 100 1000 NU 12 of reading 1 LSD for 0 to 500 NTU 3 of reading 1 LSD for 501 to 1000 NTU 0 01 NTU or 1 of reading whichever is greater with gel samples Response Time Calibration Standards Standardization lt 6 seconds for full step 0 0 02 NTU 20 NTU 100 NTU 800 NTU EPA approved polymer based primary standards Light Source Life Detector Display Sample Volume Required Operating Temperature Range A os le insulation Rating2. Turbidity oso 19 Meme IP T a tb 19 8 27 Why ls IElMportant iio cdta b tete e P e Es 19 8 3 Measurement Principle ssssssssssseseeneeeee eene 19 8 4 Nephelometric Turbidity Units NTU sse 20 gS INDEXING a ss ia eb DUO RE ERA 20 9 Addendum 2 Guide to Good Measurement Technique 21 9 1 Maintain sample vials in good condition ssseee ncnr cnn 21 9 2 Match Sample Vials ssssssssssssssesseenenen 21 9 37 1069 551 0 gt cash tec tente ipte tea cie Ld PLU 22 9 4 Timeliness of 22 9 5 Other Important Sampling Techniques sss 22 6 Calibration is rece ete A 23 E DMI A Nass 23 10 rasa 24 11 Return OF ii 24 Instruction Manual TN 100 T 100 1 Overview Thank you for selecting the waterproof portable TN 100 T 100 turbidimeter The TN 100 T 100 allows you to measure turbidity of an aqueous sample in the field This instrument operates on the nephelometric principle of turbidity measurement and is designed to meet the criteria specified in ISO 7027 and DIN 27027 standards see Measurement Principle on page 19 1 1 Unpacking TN 100 T 100 Meter and Accessories The table below indicates the items that you should find in your turbidimeter
3. gt 1 000 000 tests Silicon photovoltaic SUDAN nw 27 ii annunciators Borosilicate glass with screw caps fill line and indexing mark 51 H x 25 Dia mm 2 x 1 in A umo nr 0 C to 50 C 32 F to 122 F 0 C to 50 C 32 F to 122 F 0 90 RH non condensing at 30 C 86 F 4 x AAA Alkaline Batteries gt 1200 readings ABS Plastic IP67 rated PN Meter 200 g 7 oz Meter with case 1 25 kg 2 75 Ib Meter 6 8 W x 15 5 L x 4 6 H cm 2 7 x 6 1 x 1 8 in Meter with Case 16 W x 35 L x 12 H cm 6 3 x 13 8 x 4 7 in 18 Instruction Manual TN 100 T 100 8 Addendum 1 Turbidity 8 1 Definition Turbidity is defined as an expression of the optical property that causes light to be scattered and absorbed rather than transmitted in straight lines through the sample That is turbidity is the measure of relative sample clarity not colour Water with cloudy or opaque appearance will have high turbidity while water that is clear or translucent will have low turbidity High turbidity value is caused by particles such as slit clay microorganisms and organic matter By definition turbidity is not a direct measure of these particles but rather a measure of how these particles scatter light 8 2 Why Is It Important For drinking water application a turbidity value may give an indication of presence of bacteria pathogens or particles that can shelter harmful organisms from di
4. has no meaning or an error message Err 8 appears times indicating that the meter goes to measurement mode Figure 7 Power up Sequence 3 2 Turbidity Measurement Procedure An accurate turbidity measurement depends on good measurement techniques Factors such as clean sample vials positioning of vial in the sample well covering the vial with the light shield cap meter calibration handling of meter and others have to be taken into consideration Please see the following sections for more information Section 5 1 Vials Handling Cleaning and Care page 16 Section 9 Addendum 2 Guide to Good Measurement Technique page 21 10 Instruction Manual TN 100 T 100 Preparation of Sample Vial 1 2 3 8 Obtain a clean and dry sample vial Take care to handle the sample vial by the top Rinse the vial with approximately 10 ml of the sample water capping the vial with the black screw cap and gently inverting it several times Discard the used sample and repeat the rinsing procedure two more times Fill the rinsed vial with the remaining portion approximately 10 ml of the grab sample up to the mark indicated in the vial Cap the vial with the supplied black screw cap Wipe the vial with the soft lint free cloth supplied Ensure that the outside of the vial is dry clean and free from smudges Figure 8 Sample Vial Apply a thin film of silicone oil supplied on the sample vial see Figure 9 W
5. is updated a 4 second recovery time occurs before the meter can perform another function If any key is pressed during the recovery time the meter will perform the corresponding action at the end of the recovery period 2 When performing a measurement if the meter detects stray light exceeding the amount equivalent to 0 02 NTU in the low range the measurement is immediately aborted and an error message ERR 8 is displayed Ensure the vial sits properly into the sample well Press the ENTER READ key to re do the measurement 14 Instruction Manual 4 Troubleshooting Guide TN 100 T 100 The TN 100 T 100 turbidimeter routinely performs self diagnostics and wvill automatically generate messages to provide you with specific diagnostic information These messages are for your use and do not indicate a reduction in the performance of the instrument or a failure of any component in the instrument unless otherwise stated in this list LCD Message ERR 1 ERR 2 ERR 5 ERR 6 ERR 7 Description Calibration Error The meter is unable to recognize the 800 NTU Calibration Standard Calibration Error The meter is unable to recognize the 100 NTU Calibration Standard Calibration Error The meter is unable to recognize the 20 0 NTU Calibration Standard Calibration Error The meter is unable to recognize the 0 02 NTU Calibration Standard Calibration Error There is not sufficient signal to achieve the approp
6. shipment Item Quantity 1 Portable TN 100 T 100 Turbidimeter with 4 AAA batteries 1 2 Instruction Manual 1 Light Shield Cap 1 5 Calibration Set 0 02 20 0 100 800 NTU Standards 1 7 Plastic bottle empty for collecting sample 1 Ad 9 Lint free cloth 1 Remove TN 100 T 100 turbidimeter from the packing carton Carefully inspect all items to ensure that no visible damage has occurred during shipment If the items you received do not match your order please contact your nearest distributor immediately WARNING Extra care should be taken when unpacking opening and handling the calibration standards and sample vials Surface scratches or finger smudges on the vial surface may cause measurement errors Handle these items by their caps only Batteries provided with the meter package are to be installed prior to use See Section 1 4 Battery Installation on page 4 Figure 1 depicts the meter The three main components of the instrument are the sample well the display and the keypad The following sections describe the functionality of the display and the keypad The proper use of the instrument and the sample well are discussed in later sections Instruction Manual TN 100 T 100 Sample Vial Sample Well Index Mark Liquid Crystal Display Keypad Figure 1 Parts of TN 100 T 100 Turbidimeter 1 2 Display All the LCD segments and annunciators that can appear on the displ
7. Instruction Manual TN 100 T 100 Portable Turbidimeter IS0 9001 68X357701 Rev 4 06 cate ompliance This is to certify that the TNI00 Portable Turbidimeter complies with the specifications established by the ISO 7027 International Standard for Water Quality Determination of Turbidity Section 3 Quantitative Methods using Optical Turbidimeters INSTRUMENTS Technology Made Easy Preface This manual functions in two ways first as a step by step guide to help you operate the waterproof TN 100 T 100 turbidimeter second it serves as a handy reference guide It contains basic instructions that you must follow during the operation care and maintenance of the instrument The safety protection provided by this equipment may be impaired if it is used in a manner not described in this manual It is recommended that all operators should read this manual prior to working with this instrument Eutech Instruments Oakton Instruments cannot accept any responsibility for damage or malfunction to the meter caused by improper use of the instrument The information presented in this manual is subject to change without notice as improvements are made and does not represent a commitment on the part of Eutech Instruments Pte Ltd Oakton Instruments Note Eutech Instruments Pte Ltd Oakton Instruments reserves the right to make improvements in design construction and appearance of products with
8. at the calibration standards are not violently shaken or agitated because air entrapment in the fluid introduces an error factor during calibration which subsequently will lead to an inaccurate measurement Also do not store in freezing temperatures which causes irreversible shrinkage of the standards particles thus resulting to inaccurate calibration and measurement Due to the high quality of the glass vials provided indexing is not required You only need to align the mark on the vial with the mark on the meter However in order to achieve a better accuracy of the measurement you can proceed with indexing of the vials See Section 8 5 Indexing a Vial on page 20 for more information Instruction Manual TN 100 T 100 2 3 Calibration Procedure 1 2 9 10 11 Place TN 100 T 100 turbidimeter a flat and level surface Insert the CAL 1 standard 800 NTU into the sample well aligning the mark on the vial with the mark on the meter See Figure 10 on page 12 Press down vial until it snaps fully into the instrument Cover the vial using the light shield cap Press ON OFF key to switch the on the meter The meter goes to measurement mode after the power up sequence Select the calibration function of the instrument by pressing the CAL key once The CAL annunciator blinks momentarily and the meter prompt for the first calibration standard CAL 1 800 NTU Press READ ENTER key The CAL 1 800 NTU an
9. ay are shown in Figure 2 The display is used for reporting the turbidity reading and to provide guidance for the operation of the instrument In addition the display has several other annunciators that are used to communicate error messages and provide user guidance Calibration Standards Battery Indicator CAL 13 CAL 24 GX TAvg NA NA NA wol US 9 US 14 segment Liquid Crystal Display Figure 2 Customized LCD with all annunciators Instruction Manual TN 100 T 100 1 3 Keys and Functions The keypad has five keys ON OFF CAL A V and READ ENTER Key Functions Powers on and shuts off the meter With the auto switch off feature the meter automatically shuts off 20 minutes after last key press Initiates the calibration mode of the meter When pressed the meter is set to accept the first calibration standard It is also used to exit the calibration mode if the user does not want to follow the complete calibration procedure When in measurement mode the READ ENTER key is used to perform a measurement Single shot measurements When the key is pressed and released immediately a quick key stroke of less than 0 3 seconds the display will READ blink Rd for 10 times and then display the measured value ENTER Continuous measurements If the READ ENTER key is pressed and held the instrument will perform a continuous measurement during which the display is updated every 2 seconds This can be us
10. d by many factors Some are inherent in the instrument s design such as angle of detection light beam aperture incident beam wavelength and color sensitivity of the photocell However there are other factors such as stray light air bubbles and care of vial which can be prevented through proper care of equipment and accessories and in the operating procedure for measurement Here are some points you may want to note 9 1 Maintain sample vials in good condition Sample vials must be meticulously clean and free from significant scratches lt should be treated on the outside with a thin coat of silicone oil This is to mask minor imperfections and scratches that may contribute to stray light Sample vials should be handled only by the top to avoid dirt accumulation or deposits and fingerprints that might interfere with the light path More information is found in Section 5 1 Vials Handling Cleaning and Care on page 16 9 2 Match Sample Vials Best accuracy and repeatability of turbidity measurement are achieved using a single indexed vial However for more convenience different vials can be used for measurement provided their readings with the same solution are matched That is the meter gives identical readings or within the specified repeatability and accuracy of the meter Select a few vials After the sample vials are cleaned fill them with ultra low turbidity water Allow the sample vials to stand and for air bubbles to r
11. e to temperature and settling Temperature can affect particles by changing their behavior or creating new particles if precipitates are formed Dilution water may dissolve particles or change their characteristics It is recommended to take samples only when the turbidimeter is ready to be operated Samples should not be drawn and allowed to sit while the instrument warms up or is being readied 9 5 Other Important Sampling Techniques 1 Samples should not be violently shaken or agitated as particles can be broken apart or air may be entrapped into the fluid Gentle agitation such as swirling the sample vial is advisable to reduce particle settling 2 Sample vials should be used only with the instruments for which they were intended Do not mix and match 3 Perform a visual observation of the sample vial every time a measurement is made Ensure that there are no visible bubbles in the sample and the vial is clean and free of scratches 4 Samples entering the turbidimeter should be at the same temperature as the process flow samples Changes in temperature can cause precipitation of soluble compounds and affect readings 5 Sample vials should be evaluated with a low turbidity water after cleaning to determine if cells remain matched If the evaluation determines that a cell is corrupted discard the vial It is recommended to conduct this evaluation weekly 6 When in doubt or question about whether a sample vial is too scratched or stai
12. ed for indexing vials This function is not available in calibration mode After the READ ENTER key is released the instrument will automatically perform a single shot measurement Active only during calibration mode These keys are used to select the calibration point in incremental decremental manner NOTE This meter is fitted with an auto incrementing feature i e after the successful calibration of one point it auto selects the next calibration point or automatically exits the calibration mode after the fourth calibration point READ ENTER Y WATERPROOF Figure 3 Keypad Instruction Manual TN 100 T 100 1 4 Battery Installation Four AAA sized batteries are included in the packaging 1 Use a Philips screwdriver to remove the two screws holding the battery cover See Figure 4 2 Remove the battery cover Insert the batteries Follow the diagram inside the cover for correct polarity 4 Replace the battery cover onto its original position using the two screws removed earlier 5 The meter is now ready to operate Philips Screws fF Battery cover Four AAA sized batteries Figure 4 Battery Installation NOTE Dispose used batteries in accordance with your local regulations Instruction Manual TN 100 T 100 2 Turbidity Calibration The TN 100 T 100 turbidimeter was calibrated and tested prior to leaving the factory Therefore it is possible to use the instr
13. er Measure the turbidity of the diluted sample If the reading is 300 NTU the turbidity of the original sample is 1050 NTU In this case Td 300NTU Vs 20ml Vd 50ml so T 300 20 50 20 300 70 20 21000 20 1050 Instruction Manual TN 100 T 100 10 Warranty The TN 100 T 100 meter is supplied with a 2 year warranty from manufacturing defects and calibration standards for 6 months If repair or adjustment is necessary and has not been the result of abuse or misuse within the designated period please return freight pre paid and correction will be made without charge Eutech Instruments Oakton Instruments will determine if the product problem is due to deviations or customer misuse Out of warranty products will be repaired on a charged basis Exclusions The warranty on your instrument shall not apply to defects resulting from e Improper or inadequate maintenance by customer e Unauthorized modification or misuse e Operation outside of the environment specifications of the products Waterproof Seal Opening the instrument enclosure excluding the battery compartment may void the warranty 11 Return of Items Authorization must be obtained from our Customer Service Department or authorized distributor before returning items for any reason A Return Goods Authorization RGA form is available through our Authorized Distributor Please include data regarding the reason the items are to be returned For
14. er the vial with the light shield cap Press READ ENTER key and release immediately 0 3 seconds See Figure 12 The display blinks Rd for about 10 times and then display the measured value 13 Measurement Mode Place sample vial into the sample well SAMPLE Unknown Press key and release immediately Rd flashes about l 10 times Figure 12 Single shot Measurement Instruction Manual TN 100 T 100 For Continuous Measurement 1 Make sure the meter is sitting on a flat and level surface and is in measurement mode The display shows the last measured value or STbY 2 Place the sample vial in the sample well 3 Press READ ENTER key and hold See Figure 13 4 Wait for the reading to stabilize before rotating the sample vial NOTE During continuous measurement the display is updated every 2 seconds The displayed reading may not be the actual turbidity value For accurate measurement use single shot measurement You can rotate the sample vial for indexing purpose See Section 8 5 Indexing a Vial on page 20 for more information 5 Once you release READ ENTER key the meter automatically performs a single shot measurement Measurement Mode Place sample vial into the sample well SAMPLE Unknown Reading flashes and updates every 2 seconds Figure 13 Continuous Measurement NOTES 1 After a measurement is completed and the display
15. ht Transmitted Light Lamp Lens Glass Sample Vial Figure 14 Basic Nephelometric arrangement for turbidity measurement 8 4 Nephelometric Turbidity Units NTU Nephelometric Turbidity Units NTU Unit of measure used when relating the light scattered by a liquid media to the light scattered by a known concentration of a standard solution This unit of measure is recognized as a measure of the optical clarity of an aqueous sample NTU is the accepted unit of measurement for turbidity Another unit commonly used to measure turbidity is Formazin Turbidity Unit FTU The two units of measure of turbidity are equivalent 1 NTU 1 FTU 8 5 Indexing a Vial The United States Environmental Protection Agency US EPA recommends that vials used for turbidimeter calibration or sample measurement be indexed To index a sample vial slowly rotate the vial throughout one complete revolution 360 While rotating the sample vial observe the display and locate the position that the vial is in which provides the lowest turbidity reading This position is the indexed position of the vial Mark this position on the vial not on the cap against the mark on the meter After indexing a vial make sure the vial will always be placed inside the sample well in the indexed position Instruction Manual TN 100 T 100 9 Addendum 2 Guide to Good Measurement Technique Turbidity is a very complex analytical measurement which can be affecte
16. instrument If you do not plan on leaving the instrument in the supplied carrying case when not in use ensure that the instrument has been turned off and that a clean sample vial fitted with a black cap has been placed in the sample well This will ensure that a minimal amount of dust and or debris will be able to settle on the optics of the instrument 5 1 Vials Handling Cleaning and Care Proper measurement of the turbidity of a sample requires the use of a vial that is free of marks smudges scratches and any bacterial growth Therefore sample vials must be handled with absolute care to avoid contamination or damage which might change the optical characteristics of the glass Scratches fingerprints and water droplets on the sample vial or inside the sample well can cause stray light interference leading to inaccurate readings Cleaning the vial is accomplished by washing the interior and exterior of the vial in a detergent solution Once cleaned the vial should be rinsed thoroughly 8 to 10 times with clean distilled water to eliminate the possibility of detergent buildup and streaking Vials can also be acid washed periodically and coated with a special silicone oil to fill small scratches and mask the imperfections in the glass Since the silicone oil required for this application should have the same refractive characteristics as glass it is recommended that the oil be obtained from us Care should be taken not to apply excessi
17. ipe with a soft cloth to obtain an even distribution over the entire vial s surface NOTES 1 The purpose of oiling the vial is to fill small scratches and to mask the imperfection in the glass 2 Do not apply large quantity of oil as this may collect dirt and dust The sample vial is now ready to be inserted into the sample well of the meter for measurement o Figure 9 Apply a thin film of silicon oil Instruction Manual Measurement Procedure 1 2 10 TN 100 T 100 Place TN 100 T 100 turbidimeter on a flat and level surface Place the sample vial inside the sample well and align the vial s index mark with the meter s index mark See Figure 10 Light shield cap for covering the vial during measurements Align index mark on the sample vial with the index mark on the TN 100 T 100 turbidimeter and push till it is fully snapped in IMPORTANT Place meter on a flat and level surface DO NOT hold it on hands while operating the meter It may lead to inaccurate readings Figure 10 Align sample vial s index mark with meter s index mark Push the vial until it is fully snapped in Cover the vial with the light shield cap Turn on the meter by pressing the ON OFF key After the power up sequence the meter goes to measurement mode and the display blinks Rd for about 10 times See Figure 11 The measured reading appears in the display If necessary place the second sample via
18. ise Polish sample vials with silicone oil and take turbidity measurement at several points while rotating it in the sample well Find the position where turbidity reading is the lowest and index it for each vial Whenever these sample vials are used use the indexed mark to position each vial into the sample well Choose those vials that match the readings NOTE Not all vials can be matched because of some manufacturing variations Instruction Manual TN 100 T 100 9 3 Degassing Air or other trapped gases should be removed before measurement Degassing is recommended even if no bubbles are visible There are three methods commonly used for degassing Addition of a surfactant This involves adding a surfactant to the water samples to lower the surface tension of the water thereby releasing trapped gasses Application of a partial vacuum Partial vacuum can be created by using simple syringe or vacuum pump This is only recommended for ultra low turbidity measurement Use of an ultrasonic bath This may be effective in severe conditions or in viscous samples but not recommended for ultra low measurements Each of the method above has its own advantages and disadvantages For instance under certain sample conditions the use of vacuum pump or ultrasonic bath may actually increase the presence of gas bubbles 9 4 Timeliness of Sample Samples should be measured immediately to prevent changes in particle characteristics du
19. l into the sample well Remember to align the vial s mark with the meters index mark Press READ ENTER key The display blinks Rd for several times measured reading appears Repeat steps 2 through 9 for all of your samples 12 Measurement Mode SAMPLE Place sample Unknown Vial into the NTU sample well READ ENTER Rd flashes about l 10 times Figure 11 Reading Turbidity Value Instruction Manual NOTES TN 100 T 100 1 NEVER pour liquid directly into the sample well of the instrument Always use a vial The instrument will only accurately measure the turbidity of a sample when vials sealed with the black caps are used The black cap serves as both seal and a light shield 2 NEVER attempt to clean the sample well The optics may be damaged 3 For battery conservation the instrument automatically powers off 20 minutes after the last key pressed 3 3 Single Shot or Continuous Measurement You can use TN 100 T 100 turbidimeter to take a single reading or perform continuous measurement The latter is only used for indexing the vials See Section 8 5 Indexing a Vial on page 20 for more information For Single shot Measurement 1 Make sure the meter is sitting on a flat and level surface and is in measurement mode The display shows the last measured value or STbY after exiting calibration mode Place sample vial in the sample well Cov
20. ned throw it away Instruction Manual TN 100 T 100 9 6 Calibration 1 2 3 Do not open the vials with calibration standards Check that the standards have not expired Make sure the calibration vials are free of dust smudges and scratches before use Conduct the calibration in the same manner each time Variations in how calibration is performed could yield inaccurate measurements It is very important that the user s who perform calibration have been trained to do so Creating a Standard Operating Procedure SOP for the user s to read learn and practice may help to ensure accuracy 9 7 Dilution This dilution procedure is necessary only when your turbidity measurement is above 1000 NTU 1 To measure the turbidity above 1000 NTU dilute the sample with turbidity free water Turbidity free water can be obtained by filtering deionized water through a lt 0 2um filter membrane with precision sized pores Measure the volume of the sample before dilution and record the value in ml Vs Take a known volume Vd of dilution water and add it to the sample Pour 10 ml of the diluted sample in a clean vial and measure the turbidity of the diluted sample Record this value in NTU Td Calculate the true turbidity T of the original sample in NTU using the following formula T Td Vs Vd Vs Example Dilute 20 ml of the original sample whose turbidity is above 1000NTU with 50 ml of dilution wat
21. nunciator blinks for about 12 seconds while the instrument performs calibration of CAL 1 point When the instrument has completed calibration for this point it prompts you to insert the next calibration standard into the sample well CAL 2 100 NTU Repeat the calibration for CAL 2 CAL 3 8 CAL 4 calibration standards After you successfully calibrate the CAL 4 standard 0 02 NTU the display shows STbY The meter is now ready for measurement Figure 5 shows the complete calibration sequence NOTES 1 If you wish to exit the calibration mode you may do so at the end of any step by pressing the CAL key The meter accepts only the values calibrated prior to exiting 2 You can skip a calibration point by pressing A or W keys and move on to the next calibration point 3 After a successful calibration of one point the meter automatically selects the next calibration point The meter automatically exits calibration mode after the fourth calibration point 4 If an error occurs during calibration the display shows an error message The meter aborts calibration and returns to the measurement mode without saving the last calibration value 5 For a list of error messages refer to Section 4 Troubleshooting Guide on page 15 Instruction Manual TN 100 T 100 Measurement Mode Place the CAL 3 standard into the Flashes about 5 times sample well D CAL 1 CAL 1 Y Place the CAL 1 800 NTU standa
22. out notice Copyright O 2006 All rights reserved Eutech Instruments Pte Ltd Oakton Instruments Table of Contents Exerc M 1 1 4 Unpacking TN 100 T 100 Meter and Accessories 1 JAMES 2 1 3 Keys and Funcions acta aa eerte tenth is eta OSES AR IE et aioe 3 1 4 Battery Installation dt nicer be deer eerie Re 4 2 Turbidity CATAN 1 ekic oe ep eoi tn Sc ex pedo oe denn 5 2 1 Calibration eene 5 2 2 Indexiligus isi p EE EROR OT HR RAT atout RANA Ep Rte TE ERU be 5 2 3 Calibration Procedure ssssssssssssssseee eene eren nennen nnn 6 24 Restoring Factory Calibration ssessseene eee 8 3 Turbidity 10 3 1 General 10 3 2 Turbidity Measurement Procedure ooococcccnnocccccononccnncnnancnc nano cnn nnnno eene 10 3 3 Single Shot or Continuous Measurement 13 4 Troubleshooting Guide ici IER RRXEE REEEnE S ASRSRRNNRRKNNERE RA MEG 15 5 Routine Maitena CO irnos 16 5 1 Vials Handling Cleaning and Care 16 EN Quote qr 17 FEET CIN CATIONS Me 18 8 Addendum T
23. rd into the sample well CAL 4 Place the CAL 4 0 02 NTU standard into the sample well Flashes about 10 times Place the CAL 2 standard into the sample well ST 5S Measurement Mode Flashes about 10 times Figure 5 Calibration Sequence Instruction Manual TN 100 T 100 2 4 Restoring Factory Calibration The TN 100 T 100 turbidimeter allows you to reset the meter back to the factory default calibration values This feature is extremely useful when there are errors in calibration or when you have new calibration standards 1 With the meter switched off press and hold A key 2 Switch on the meter using ON OFF Release A key when URST User Reset appears in the display 3 The display shows URST for about 2 seconds and then shows 4 Use A or V key to select between YES or YES To restore meter back to factory calibration values No Toretain last calibrated values 5 Press READ ENTER key to confirm your selection The meter performs the reset if YES is selected 6 The display flashes Rd about 10 times indicating that the meter goes to measurement mode Figure 6 shows the sequence for restoring factory calibration values Instruction Manual TN 100 T 100 Instrument Off Press 8 hold 4 key and switch on the meter using ON OFF key RI am I Release A key when you J see URST in the display IN Pre
24. riate resolution in the 0 1000NTU range General Calibration Failure There is not sufficient signal to achieve the appropriate resolution in the 0 100NTU range General Calibration Failure There is not sufficient signal to achieve the appropriate resolution in the 0 20 NTU range Excessive stray light detected Corrective Actions Ensure to use the correct 800 NTU calibration standard Ensure to use the correct 100 NTU calibration standard Ensure to use the correct 20 0 NTU calibration standard Ensure to use the correct 0 02 NTU calibration standard Re do calibration with all 4 standards provided Re do calibration with all 4 standards provided Re do calibration with all 4 standards provided Ensure the vial is fully snapped empting a measurement when low battery indicator is on Lamp Failure When Turbidity value is above the measurement range 1000NTU Low battery indication The batteries need to be replaced eplace batteries Return unit Dilute sample See Section 9 7 on page 23 Replace batteries f an error message appears take the appropriate corrective action and re do the desired procedure If the problem persists contact Eutech Instruments or your dealer See Sections on Warranty and Return of Items on page 24 15 Instruction Manual TN 100 T 100 5 Routine Maintenance The supplied carrying case is optimal for protecting the
25. sinfection process Therefore turbidity measurement is particularly useful for water treatment plants to ensure cleanliness In industrial processes turbidity can be part of quality control measure to ensure efficiency in treatment or manufacturing process 8 3 Measurement Principle There are two internationally accepted standard specifications for turbidity measurement These are the international standard ISO 7027 and the US EPA method 180 1 Basically the ISO 7027 is a more stringent standard and requires the use of a monochromatic light source It also governs the design of a turbidimeter in the following areas 1 Light source s wavelength 2 Light sources spectral bandwidth 3 Measuring angle 4 Aperture angle in water sample 5 Distance traversed by incident light and scattered light within the sample 6 Calibration standard The TN 100 T 100 turbidimeter follows the ISO 7027 standard whose specification allows for greater reproducibility of the measured values and greater agreement between other measuring instruments Provided by Standard Methods for the Examination of Water and Wastewater APHA AWWA and WPCF 16 Edition 1985 19 Instruction Manual TN 100 T 100 Figure 14 shows the waterproof TN 100 T 100 turbidimeter basic optical system lt includes a light source and a detector to monitor the light scattered at 90 with respect to the incident beam Detector at 90 A AAA i ME Scattered Lig
26. ss or W key to select YES or No Select No and then press READ ENTER key to retain last calibration values without retrieving factory calibration Select YES and then press READ ENTER key to restore factory calibration Rd flashes about 10 times Measurement Mode Figure 6 Restoring Factory Calibration Instruction Manual TN 100 T 100 3 Turbidity Measurement 3 1 General Information The waterproof TN 100 T 100 turbidimeter allows you to measure the turbidity of a grab sample The turbidity is reported in Nephelometric Turbidity Units NTU Readings above 1000 NTU are outside the range of this instrument NOTE Before switching on the TN 100 T 100 turbidimeter a sample vial MUST be placed in the sample well You can use any of the calibration standards for this purpose The light shield cap provided could be used to cover the vial during measurements When the ON FF key is pressed to switch on the meter it goes through the power up sequence as shown in Figure 7 below Place a sample vial or any of the calibration standards provided into is software revision the sample well of the meter before number Switch on E Instrument Off UU CAL 13 CAL 24 EX TAvg 10 00 7 A reading is valid only if you have placed a Rd flashes about 10 vial or any of the calibration standards provided into the sample well Otherwise the reading
27. ument directly out of the box However re calibration of the instrument is recommended to help you become familiar with the operation of the instrument and the calibration procedures In addition re calibration is recommended at least once every month for optimum accuracy It is recommended that you perform a full calibration using all 4 standards provided to ensure full range accuracy However the TN 100 T 100 turbidimeter provides flexibility for you to calibrate at selected ranges suitable for your application In addition the instrument comes with a light shield cap to shield off stray light during calibration and measurements 2 1 Calibration Standards We recommend that you use the following materials during calibration to achieve the accuracy stated in this manual CAL 1 800 NTU Calibration Standard CAL 2 100 NTU Calibration Standard CAL 3 20 0 NTU Calibration Standard CAL 4 0 02 NTU Calibration Standard It is well known that diluted Formazin is unstable If you choose to use Formazin to calibrate the instrument ensure that you are using a fresh stock suspension of Formazin to achieve the accuracy quoted for the instrument Calibration standards offered are more stable than Formazin and have a limited shelf life of 12 months If you use the supplied calibration standards to calibrate the instrument review the expiration date indicated on cap label to ensure that the standards have not expired It is important th
28. ve oil that could attract dirt or contaminate the sample well of the meter Once the oil has been applied to the vial the excess oil should be removed with a lint free cloth The result should be a sample vial surface with a dry appearance but with all imperfections filled with oil Sample vials should always be handled from the top or by the cap to avoid fingerprints or smudges After a vial has been filled with a sample and capped the outside surface should be wiped with a clean lint free absorbent cloth until it is dry Cleaned and dried vials should be stored with the black caps on The vials can be stored in the carrying case During normal operation you may use any typical glass cleaner along with a lint free cloth or tissue Kimwipes to clean the outside of the vials Condensation may appear on the vial when your sample is very cold and the relative air humidity is high When this happens the turbidity that you read may be higher than the actual turbidity due to the light scattered by the condensate on the vial If you find yourself in this circumstance you can alleviate the problem by either coating the vial with an anti fogging agent or by running warm water over the vial for a short period of time to warm the sample prior to measurement 16 Instruction Manual 6 Accessories TN 100 T 100 The items shown below are recommended accessories and replacement parts for the instrument Eutech Item Description Instruments
29. your protection items must be carefully packed to prevent damage in shipment and insured against possible damage or loss Eutech Instruments Oakton Instruments will not be responsible for damage resulting from careless or insufficient packing A restocking charge will be made on all unauthorized returns NOTE Eutech Instruments Pte Ltd Oakton Instruments reserve the right to make improvements in design construction and appearance of products without notice 24 For more information on Eutech Instruments Oakton Instruments products contact your nearest distributor or visit our website listed below Oakton Instruments Eutech Instruments Pte Ltd Distributed by P O Box 5136 BIk 55 Ayer Rajah Crescent Vernon Hills IL60061 USA 04 16 24 Singapore 139949 Tel 1 888 462 5866 Tel 65 6778 6876 Fax 1 847 247 2984 Fax 65 6773 0836 E mail info 4oakton com E mail Web site marketing eutechinst com www 4oakton com Web site www eutechinst com
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