Hanna Instruments LP 2000 Marine Instruments User Manual
Contents
1. Note To minimize error caused by the cu Using the 93703 0 bottle containing the ZERO FTU Standard turbidity free water fill the measurement cuvette and secure the cap vette it is recommended to use the same cuvette for calibration and mea surement Insert cuvette into the holder Press CAL An intermittent SIP indicates that the instrument is being calibrated After approximately minute the instru ment will ask for the HI 93703 10 standard solution 10 FTU by display ing 10 0 Refill the cuvette with the HI 93703 10 AMCO AEPA standard at 10 FTU and place it into the measurement cell Press CAL again After approximately 1 minute the LCD will display The instrument is now calibrated and ready for use TIPS TO OBTAIN ACCURATE CALIBRATION All glassware that comes into contact with standards should be kept dean Wash with HI 93703 50 cleaning solution and rinse with HI 93703 0 or turbidity free water Rinse the cuvette twice with 5 mL of the liquid to be tested This removes any previous liquid and any dust or foreign matter that may be present Gently pour the liquid down the side of the vial to reduce air bubbles no mixing is required when 93703 0 and 93703 10 AMCO AEPA 1 standards are used Before inserting the vial into the instrument wipe it clean with HI 93703 70 or a soft lint free tissue Handle vials so that no fin gerprints2. Silicon Photocell Power Source 12VDC through HI 710005 or HI 710006 Environment 0 to 50 C 32 to 122 F max RH 95 non condensing Dimensions 230 x 170 x 70 mm 9 1 x 6 7 x 2 7 Weight 1 NIU 600 g 1 3 Ib OPERATIONAL GUIDE POWER CONNECTION Plug the 12VDC adapter HI 710005 110VDC or HI 710006 220VDC into the DC socket see page 5 Plug the adapter into the outlet Note Insure the main line is surge protected Note Always turn the meter off before unplugging it to insure no data is lost MEASUREMENT PROCEDURE ON Turn the meter on by pressing ON OFF C OFF The meter will first perform an LCD self diagnostic test by displaying a full set of figures It will then switch to the measure ment mode e When the LCD displays the meter is ready Fill a clean cuvette up to one quarter inch 0 5 cm from its rim with the thoroughly agitated sample Allow sufficient time for bubbles to escape before securing the cap Note Do not overtighten the cap Wipe the cuvette thoroughly with lint free tissue HI 93703 70 before inserting the cuvette into the measurement cell The cuvette must be completely free of finger marks oil or dirt especially in the area where the light passes through i e approximately the bottom 2 cm 3 4 inch of the cuvette Place the cuvette into the holder and check
3. and retrieval of the last calibration date 10 FTU was chosen as the calibration point because its value best fits the water turbidity measurements in a wide range of applications from drinking water to wastewater treatment 3 1 NIU UNITS OF MEASURE Hanna Instruments uses the primary standard AMCO AEPA 1 to avoid all formazine related problems Formazine is a toxic unstable substance which requires particular care Calibration requiring formazine standards must be preformed immediately after preparation of the standards Formazine standards may not be reused because of their short life LP 2000 standards are extremely stable and have a shelf ife of up to six months Uncontaminated standards may be reused LP 2000 can be used with both AMCO AEPA and formazine stan dards FTU is equal to the NTU However other known measurements include Jackson Turbidity Unit or JTU based on the old method of ackson s candle and Silica Unit in mg L of Si0 See the conversion able below for these units FTU NTU SiO mg L 25 FTU NTU 0 13 510 mg L 1 PRINCIPLE OF OPERATION LP 2000 has been designed to perform measurements according to the ISO 7027 International Standards The instrument functions by passing a beam of infrared light through vial containing the sample being measured The light source is a High Emission Infrared LED with a wavelength peaking
4. at 890 nm which reduces interference caused by colored samples fo a minimum A sensor positioned at 90 with respect to the direction of light detects the amount of light scattered by the undissolved particles present in the sample The microprocessor converts such readings into FTU values LIGHT DETECTOR 90 SCATTERED LIGHT EMITTED LIGHT 890 nm iE VLA CUVET 1 NT FUNCTIONAL DESCRIPTION FRONT PANEL LP 2000 Turbidity Meter NES instruments e 1g mE Lt f DATE 7 gt C a ae uvette Holder ual Level Liquid Crystal Display OFF AL fo enter the Calibration Mode to perform measurements and to set the day and month of the last calibration 6 DATE to display the last calibration date and to select the month or the day of the last calibration oo wm IEL REAR PANEL Power Socket 12V to 20V DC SPECIFICATIONS LP 2000 Range 0 00 to 50 00 FTU 50 to 1000 FIU Resolution 0 01 1 FTU Accuracy 20 C 68 F 0 5 or 5 whichever greater Typical EMC Deviation 0 2 FTU Light Source High Emission Infrared LED Light Source Life Life of the instrument Light Detector
5. tampering or lack of prescribed maintenance are not covered f service is required contact the dealer from whom you purchased the instrument 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 irst obtain a Returned Goods Authorization number from the Cus omer Service department and then send it with shipping costs prepaid When shipping any instrument make sure it is properly packaged for complete protection All rights are reserved Reproduction in whole or in part is prohibited without the written consent of the copyright owner Hanna Instruments Inc 584 Park East Drive Woonsocket Rhode Island 02895 USA CE DECLARATION OF CONFORMITY BEANS instruments DECLARATION OF CONFORMITY We Hanna Instruments Italia Srl via E Fermi 10 35030 Sarmeola di Rubano PD ITALY herewith certify that the turbidity and ion specific meter LP 2000 has been tested and found to be in compliance with EMC Directive 89 336 EEC and Low Voltage Directive 73 23 EEC according to the following applicable normatives EN 50082 1 Electromagnetic Compatibility Generic Immunity Standard TEC 801 2 Electrostatic Discharge TEC 801 3 RF Radiated TEC 801 4 Fast Transient EN 50081 1 Electromagnetic
6. that the notch on cap is positioned securely into the groove 0 5 cm The mark on the cuvette cap should point towards the keyboard J Press the READ amp key and the LCD will display an intermittent SIP Sampling In Process The turbidity value will appear after ap proximately half minute Though LP 2000 covers a wide turbidity range highly accurate readings exceeding 40 FTU require dilution as recommended by the Standard Methods Use the formula below to calculate the amount of 93703 0 or turbidity free water needed for accurate dilution The total volume 100 mL Vos 3000 T where Vos volume of original sample ml to be added to 93703 0 to obtain the total diluted volume of 100 mL T 1 2000 reading exceeding 40 FTU E g 1 2000 reading 200 FTU 3000 200 15 ml Vos 15 ml Vos 85 mL HI 93703 0 100 mL At this point take a sample of this diluted solution and measure its turbidity The correct turbidity value of the original sample is derived by Tn x 100 mL Vos where T actual turbidity value of the original sample T LP 2000 reading of the diluted solution T22 T 27x 100 15 180 FTU TIPS TO OBTAIN BEST ACCURACY Each time the cuvette is used tighten the cap to the same degree Discard the sample immediately after the reading is taken to prevent permanent clouding of the g
7. Compatibility Generic Emission Standard EN 55022 Radiated Class B EN61010 1 Safety requirements for electrical equipment for measurement control and laboratory use Be 1 Date of Issue _6 10 1998 em P Cesa Technical Director On behalf of Hanna Instruments S r l commendations for Users efore using this product make sure that it is entirely suitable for the environment in which it is used Operation of this instrument in residential area could cause unacceptable interferences to radio and TV equipments requiring the operator to take all necessary steps fo correct interferences Any variation introduced by the user to the supplied equipment may degrade the instrument s EMC erformance avoid electrical shock do not use this instrument when voltages at the measurement surface exceed 24NKC or 6 avoid injury or damage to the meter do not perform any measurement in microwave ovens 15 HANNA instruments 20 01 w w n nai ns t T0004 TNVW
8. DC Transformer 710005 710006 Note Save all packing material until you are sure that the instrument functions correctly Any damaged or defective item must be returned in its original packaging with the supplied accessories GENERAL DESCRIPTION LP 2000 is a bench microprocessor based meter used to determine the turbidity of water and wastewater The meter covers the 0 to 1000 FTU range with 0 01 resolution from 0 00 to 50 00 FTU and in single digits from 50 to 1000 FTU It also auto ranges between the two scales Note LP 2000 has been designed according to the ISO 7027 International Standard The turbidity measurement unit is FTU Formazine Turbidity Unit which is identical to NTU Nephelometric Turbidity Unit LP 2000 carries the C mark in compliance with the European directives ensuring low emission values and accurate measurements in presence of electromagnetic fields he meter is housed in a rugged and lightweight case with an easy o read LCD he meter is simple to use All operations can be carried out with only our keys and troubleshooting functions can be performed with error codes on the display An exclusive positive locking system quarantees hat the cuvette is firmly placed in the cell The keypad is water resistant and can be wiped clean Calibration at 10 FTU can be easily performed using the supplied standard In addition LP 2000 is the first bench turbidity meter that allows the storage
9. Instruction Manual LP 2000 Microprocessor based Bench Turbidity Meter HANNA instruments isha i www hannainst com Dear Customer Thank you for choosing a Hanna Product Please read this instruction manual carefully before using the instrument It will provide you with the necessary information for the correct use of the instrument as well as a precise idea of its versatility This instrument is in compliance with C directives TABLE OF CONTENTS PRELIMINARY EXAMINATION 3 GENERAL DESCRIPTION 3 UNITS OF MEASURE snnt 4 PRINCIPLE OF OPERATION nnn 4 FUNCTIONAL DESCRIPTION 5 SPECIFICATIONS treten 6 OPERATIONAL GUIDE 7 CALIBRATION atte hee rtis 10 LCD AND ERROR CODES s 13 ACCESSORIES eR cert 14 WARRANTY cett ttr tread 14 CE DECLARATION OF CONFORMITY 15 PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it to make sure that no damage has occurred during shipping If there is any damage notify your dealer immediately LP 2000 is supplied complete with Measurement cuvette and cap e HI 93703 0 AMCO EPA 1 calibration solution 0 FTU 30 ml H193703 10 AMCO EPA T calibration solution 10 FTU 30 ml 12V
10. are left on the areas where light passes through that is the bottom 2 cm 3 4 STANDARD SUSPENSION Presently there are only two recognized primary standards AMCO AEPA 1 available through Hanna and formazine LP 2000 works with both solutions AMCO AEPA has a much longer shelf life at all concentrations approximately six months if free from contamination In addition no special handling or disposal is required and a much higher stability of suspended particles has been observed Formazine is highly toxic and is generated by a known carcinogen with poor stability particles settle quickly Lower concentrations change value quickly after dilution he consistency of LP 2000 readings by using both standards has been separately established by Advanced Polymer Systems and Hanna Instruments a Additional documentation about the formazine standard and other calibration procedures is available upon request VIEWING THE CALIBRATION DATE Turn the meter on and wait for the display to show e Press and hold the DATE B key The month and day of last calibration MM DD appear while the key is held down Note The displayed date is the date that was input by the user at the beginning of the last calibration LCD AND ERROR CODES LP 2000 displays several different LCD codes to help the user to operate the meter more efficiently This indicates that the meter is in a ready state and
11. ect is the most common interference found in commercial instruments operating in the visible light range e bubbles and the effect of vibrations that disturb the surface of the sample may produce false results Dirty scratched or etched glassware will also affect readings 9 CALIBRATION Calibration is recommended at least once a month You can verity the instrument calibration by comparing the display reading against the supplied standard solution at 10 FTU To check the date of the last calibration simply hold the DATE We key down for a few seconds CALIBRATION PROCEDURE Turn the meter on and wait for the display to show Press the CAL key once CAL will blink on the display for approx 6 seconds allowing for confirmation LE CAL While CAL is still blinking press CAL again otherwise it exits this mode CL will appear on the lower part of the display The date of calibration may now be edited by simply pressing the DATE We key The default parameter which is the month segment found on the left will blink To x scroll fo the correct number press the READ key To toggle between month 2 Rean and the day display segments press the A DATE gt key The day segment can also be edited with the READ amp key confirm the displayed values and to proceed press CAL once more An intermittent ZERO will appear on the LCD
12. lass All glassware used to contain the standards and the samples should be kept clean washed with HI 93703 50 cleaning solution and rinsed with HI 93703 0 or turbidity free water Samples should be collected in clean glass or plastic bottles with appropriate stoppers Analysis should be performed shortly after If the sample requires storage it should be kept in a cool dark place Stored samples should be restored to room temperature prior to analysis Samples may not be stored for longer than 24 hours obtain representative sample gently and thoroughly sti he solution To prevent air bubbles from forming do not shake or t the solution settle prior to sampling e Monthly calibration of the meter using 93703 10 c 10 FTU standard is recommended D e Before inserting cuvettes into the instrument wipe them with HI 93703 70 or a soft lint free issue Handle vials so that no ingerprints are left on the areas where light passes through i e he bottom 2 cm 3 4 of the cuvette If you experience any problems in taking measurements please contact your dealer or the nearest Hanna Customer Service Depart ment SOURCES OF INTERFERENCE The presence of floating debris and coarse sediments which may settle rapidly will give false readings The infrared light source of LP 2000 can effectively minimize errors due fo colored substances found dissolved in solution This True Color eff
13. measurement or calibration can be performed This indicates that the Calibration Mode is active If the CAL key is not pressed within 6 seconds the meter will automatically revert back fo the Measurement Mode This indicates that the Calibration Date Set ting Mode is active This indicates that a 0 FTU standard cali bration solution is required This indicates that the instrument is being calibrated at zero This indicates that a 10 FTU standard calibra tion solution is required This shows the last calibration date MM DD This indicates that the sample is being ana lyzed This indicates that an error occurred during calibration for example a wrong standard was used Repeat the calibration with fresh standards 710005 110VDC voltage transformer 710006 220VDC voltage transformer 731318 Tissue for wiping the cuvettes 4pcs HI 731321 _ Glass measurement cuvettes 4pcs 731325 Cap for cuvette 4pcs 93703 0 Solution for calibration MACO AEPA at 0 FTU 30 mL 93703 10 Solution for calibration MACO AEPA 1 at 10 FTU 30 mL 93703 50 Cuvette cleaning solution 230 mL WARRANTY All Hanna Instruments meters are warranted for two years against defeds in workmanship and materials when used for their intended purpose and maintained according to instructions This warranty is limited to repair or replacement free of charge Damage due to accident misuse
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