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Thermo Scientific Orion AQUAfast AQ3010 Turbidity Meter User Guide

Chapter 2

Turbidity Calibration

The AQ3010 turbidity meter was calibrated and tested prior to leaving

the factory . The meter kit includes a set of prepared primary standards

that can be used to verify the meter calibration daily and to recalibrate the

meter, if required . Before measuring samples for the first time, verify the

meter calibration with the prepared primary standards .

The SDVB primary standards in the meter kit are in plastic bottles for

improved precision and shelf life . Four vials are included and labeled for

each standard level .

The instrument includes a light shield cover to keep stray light from

changing the calibration and sample measurement readings . In many

environments, the light shield is not required . The vial cap keeps stray

light from entering the sample well, saving you many steps and reducing

analysis time .

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 precision of the

measurement, you can proceed with indexing of the vials . See the

Indexing a Vial

section for more information .

We recommend that you use the following materials during calibration to

achieve the precision stated in this user guide:

• 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 precision quoted for the

instrument . It is very difficult to accurately pipet Formazin for low level

NTU standards, due to the non-homogeneous nature of Formazin and

because these standards have very limited stability at low levels . Be sure

to use good laboratory technique and accurate Class A pipets and refer

to ASTM Method 6855-03 for low level standard vial preparation when

using Formazin .

Calibration

Overview

ndexing

Calibration

Standards

Содержание Orion AQUAfast AQ3010

Страница 1: ...Thermo Scientific Orion AQUAfast AQ3010 Turbidity Meter User Guide ...

Страница 2: ...link ROSS Resolution SAOB SMART AVERAGING Smart CheK SMART STABILITY Stacked Star Navigator 21 Stat Face The Enhanced Lab ThermaSense Triode TRIUMpH Unbreakable pH Universal Access are trademarks of Thermo Fisher Guaranteed Success and The Technical Edge are service marks of Thermo Fisher PerpHecT meters are protected by U S patent 6 168 707 PerpHecT ROSS electrodes are protected by U S patent 6 1...

Страница 3: ...Refilling the Calibration Standard Vials with Fresh Standard 10 Calibration Procedure 11 Restoring Factory Calibration 13 Turbidity Measurement 15 General Information 15 Turbidity Measurement Procedure 16 Preparation of Sample Vial 16 Measurement Procedure 17 Single Shot or Continuous Measurement 19 Routine Maintenance 21 Vials Handling Cleaning and Care 21 Customer Services 23 Troubleshooting Gui...

Страница 4: ...easurement Principle 29 Nephelometric Turbidity Units NTU 30 Indexing a Vial 30 Guide to Good Measurement Technique 31 Maintain Sample Vials in Good Condition 31 Match Sample Vials 31 Degassing 32 Timeliness of Sample 32 Other Important Sampling Techniques 33 Calibration Techniques 33 Dilution Techniques 34 Appendix 2 Appendix 1 ...

Страница 5: ... user guide prior to working with this meter The manufacturer will not accept any responsibility for damage or malfunction to the meter caused by improper use of the instrument The information presented in this user guide is subject to change without notice as improvements are made and does not represent a commitment on the part of the manufacturer Note The manufacturer reserves the right to make ...

Страница 6: ...red during shipment If the items you received do not match your order please contact your dealer 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 The batteries provided with the meter package are to b...

Страница 7: ... Thermo Scientific Orion AQUAfast AQ3010 Turbidity Meter User Guide Figure 1 AQ3010 Turbidity Meter Components Sample Well Alignment Mark Liquid Crystal Display Keypad Sample Vial ...

Страница 8: ...g 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 Display Figure 2 Customized LCD with All Annunciators CAL 13 CAL 24 mg l NTU ppm pH TAvg 14 segment Liquid Crystal Display Battery Indicator Calibration Standards Units of Measurement ...

Страница 9: ...ment Single shot measurements When the key is pressed and released immediately a quick key stroke of less than 0 3 seconds the display will blink Rd ten times and display the measured value 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 used for indexing vials Thi...

Страница 10: ... cover See Figure 4 These captive screws will remain attached to the battery cover 2 Remove the battery cover 3 Insert the batteries Follow the diagram inside the cover for correct polarity 4 Replace the battery cover in its original position and tighten the four screws removed earlier to secure the battery cover to the meter 5 The meter is now ready for use Note Dispose of used batteries in accor...

Страница 11: ...d 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 precision of the measurement you can proceed with indexing of the vials See the Indexing a Vial section for more information We recommend that you use the following materials during calibration to achieve the precision stated in this user guide CAL 1 800 NTU calibr...

Страница 12: ...causes irreversible shrinkage of the standards particles thus resulting to inaccurate calibration and measurement Before using the meter for the first time rinse the inside of the vial with a small amount of the same NTU standard that will be used to fill that vial 1 Gently pour about 5 mL of the standard into the vial 2 Cap and swirl the vial so the inside of the vial is fully rinsed with the sta...

Страница 13: ...on check for CAL 2 CAL 3 and CAL 4 calibration standards 9 If the displayed results are within 10 of the nominal NTU value of the standard or the precision criteria required by your method the calibration check passed and the meter is now ready for measurement Note If a standard no longer reads within 10 of the nominal NTU value for the standard the standard has most likely degraded The lower leve...

Страница 14: ...ing NTU value 4 Cap and swirl the vial so the inside of the vial is fully rinsed with the fresh standard 5 Pour the standard out of the vial 6 Pour the fresh standard into the vial up to the mark on the vial and cap the vial 7 Perform the procedure in the Calibration Check section with the vial containing the fresh standard If the fresh standard does not read with the 10 range of the nominal value...

Страница 15: ...t calibration standard by displaying CAL 1 800 NTU 4 Insert the CAL 1 standard 800 NTU into the sample well aligning the mark on the vial with the alignment mark on the meter See Figure 11 5 Press down the vial until it slides fully into the instrument 6 Cover the vial using the light shield cover if necessary For many environments this is not required The vial cap seals the sample well 7 Press th...

Страница 16: ...e The meter aborts the calibration and returns to the measurement mode without saving the last calibration value For an error list refer to the Troubleshooting Guide section Calibration Notes Figure 6 Calibration Sequence CAL 1 800 NTU NTU CAL 1 NTU NTU CAL 3 CAL 3 NTU CAL 2 NTU CAL 2 READ ENTER NTU CAL 1 CAL Place the CAL 1 standard into the sample well Place the CAL 3 standard into the sample we...

Страница 17: ...y 2 Switch on the meter by pressing the ON OFF key Release the key when URST User Reset appears on the display 3 The display will show URST for about 2 seconds and then No 4 Use the or key to scroll between YES or No YES Restore the meter back to factory calibration values No Retain the last calibrated values 5 Press the READ ENTER key to confirm your selection The meter performs the reset if YES ...

Страница 18: ...mes Select YES and to restore factory calibration then press key READ ENTER Select No to retain last calibration values without retrieving factory calibration and then press key READ ENTER Instrument Off Measurement Mode Press hold key and switch on the meter using key ON OFF Release key when you see U RST in the display Press or key to select or YES No ...

Страница 19: ... environments the light shield is not required The vial cap keeps stray light from entering the sample well saving you many steps and reducing analysis time When the ON OFF key is pressed to switch on the meter it goes through the power up sequence as shown in Figure 8 General Information Figure 8 Power up Sequence CAL 13 CAL 24 mg l NTU ppm pH TAvg NTU Rd flashes about 10 times indicating that th...

Страница 20: ...rting it several times Discard the used sample and repeat the rinsing procedure two times 4 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 5 Wipe the vial with the soft lint free cloth supplied Ensure that the outside of the vial is dry clean and free from smudges 6 Apply a t...

Страница 21: ...s alignment mark See Figure 11 3 Push the vial down until it slides fully in 4 Cover the vial using the light shield cover if necessary For many environments this is not required The vial cap seals the sample well 5 Turn on the meter by pressing the ON OFF key Figure 10 Applying the Silicon Oil Measurement Procedure Figure 11 Aligning the Sample Vial Alignment Mark with the Meter Alignment Mark Al...

Страница 22: ...ocedure for all of your samples Never pour liquid directly into the sample well of the instrument Always use a 25 mm vial The instrument will only accurately measure the turbidity of a sample when 25 mm vials sealed with the black caps are used The black cap serves to both seal the vial and block stray light Never attempt to clean the sample well The optics may be damaged For battery conservation ...

Страница 23: ...ode 2 Place the sample vial in the sample well 3 Cover the vial using the light shield cover if necessary For many environments this is not required The vial cap seals the sample well 4 Press the READ ENTER key and immediately release it less than 0 3 seconds See Figure 13 5 The display will blink Rd about ten times and then display the measured value Single Shot or Continuous Measurement Figure 1...

Страница 24: ...e shot measurement 6 Once you release the READ ENTER key the meter automatically performs a single shot measurement After a measurement is completed and the display is updated a 4 second recovery time occurs before the meter can perform another function If any key is pressed during this time the meter will perform the corresponding action at the end of the recovery period When performing a measure...

Страница 25: ...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 eight to ten times with clean distilled or deionized water to eliminate the possibility of detergent buildup and streaking Vials can also b...

Страница 26: ...arrying case During normal operation you may use any typical laboratory glass cleaner along with a lint free cloth or tissue 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...

Страница 27: ...e the 20 0 NTU calibration standard Use the correct 20 0 NTU calibration standard Pour fresh standard into a clean vial and retry the calibration Verify that the standard has not expired ERR 4 Calibration error the meter is unable to recognize the 0 02 NTU calibration standard Use the correct 0 02 NTU calibration standard Pour fresh standard into a clean vial and retry the calibration Verify that ...

Страница 28: ...United States call 978 232 6000 or fax 978 232 6031 In Europe the Middle East and Africa contact your local authorized dealer For the most current contact information visit www thermo com contactwater For the most current warranty information visit www thermo com water The AQ3010 meter is supplied with a 3 year warranty from manufacturing defects and calibration standards for 6 months If repair or...

Страница 29: ...uired to take whatever measures may be required to correct the interference The Thermo Scientific Orion AQ3010 turbidity meter is CE and cTUVus certified which includes TUV 3 in 1 testing to EMC and US and Canadian standards This product is required to comply with the European Union s Waste Electrical and Electronic Equipment WEEE Directive 2002 96 EC It is marked with the following symbol We have...

Страница 30: ...N 61326 1 2006 Emissions CISPR 11 2003 Radiated Emissions FCC Part 15B Class A Immunity EN 61326 1 2006 Immunity IEC 61000 4 2 2001 Electrostatic Discharge Immunity IEC 61000 4 3 2002 RF Radiated Immunity This Thermo Scientific Orion product has been manufactured in compliance with the provisions of the relevant manufacturing and test documents and processes These documents and processes are recog...

Страница 31: ...tles set of 4 calibration vials set of 3 sample vials lint free cloth silicone oil vial cleaning brush batteries and rugged carrying case AC301S Replacement calibration standards kit includes 800 100 20 0 and 0 02 NTU standards in plastic bottles AC3V25 Replacement sample vials pack of 3 25 mm diameter AC3SIL Silicone oil 10 mL bottle and lint free cloth AC3CBR Replacement vial cleaning brush Orde...

Страница 32: ...licon photovoltaic Stray Light 0 02 NTU Display 4 digit 14 segments customized liquid crystal display with annunciators Sample Vials Cuvettes Glass vials with screw caps fill line and indexing mark 51 H x 25 Dia mm 2 x 1 in Sample Volume Required 10 mL 0 33 oz Operating Temperature Range 0 C to 50 C 32 F to 122 F Sample Temperature Range 0 C to 50 C 32 F to 122 F Operating Humidity Range 0 to 90 r...

Страница 33: ... useful for water treatment plants to ensure cleanliness For wastewater effluent testing turbidity is often required to ensure that the released effluent will not harm the environment In industrial processes turbidity can be part of quality control measure to ensure efficiency in treatment or manufacturing process There are two internationally accepted standard specifications for turbidity measure...

Страница 34: ...TU The two units of measure of turbidity are equivalent 1 NTU 1 FTU The United States Environmental Protection Agency US EPA recommends that vials used for turbidity meter 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 whi...

Страница 35: ...sits and fingerprints that might interfere with the light path More information can be found in the Vials Handling Cleaning and Care section Best precision 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 iden...

Страница 36: ...vere 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 Samples should be measured immediately to prevent changes in particle characteristics due to temperature and set...

Страница 37: ...ffect 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 about whether a sample vial is too scratched or stained throw it away 1 Keep the calibration standard plastic bottles and vials tigh...

Страница 38: ...he value in mL 4 Take a known volume Vd of dilution water and add it to the sample 5 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 6 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 with turbidity above 1000 NTU with 50 mL ...

Страница 39: ...t l Fax 978 232 6031 Europe P O Box 254 3860 AG Nijkerk Wallerstraat 125K 3862 CN Nijkerk Netherlands Tel 31 033 2463887 Fax 31 033 2460832 Asia Pacific Blk 55 Ayer Rajah Crescent 04 16 24 Singapore 139949 Tel 65 6778 6876 Fax 65 6773 0836 www thermo com water 2009 Thermo Fisher Scientific Inc All rights reserved 9 0 0 1 2 0 0 8 257503 001 Rev B 06 09 ...

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