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Instruction Manual

LP2000-11

Precision Bench

Turbidity Meter

with PC Communication

w w w . h a n n a i n s t . c o m

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Summary of Contents for LP 2000-11

Page 1: ...InstructionManual LP2000 11 PrecisionBench TurbidityMeter with PC Communication w w w h a n n a i n s t c o m ...

Page 2: ...50 00 FTU and 50 to 1000 FTU The autoranging feature sets the appropriate range for the measurement The serial interface is supported connecting any available serial port on your PC and a 5 pin socket on the meter Note LP2000 11 has been designed according to the ISO 7027 International Standard consequently the turbidity measurement units are expressed in FTU Formazine Turbidity Unit FTU is identi...

Page 3: ...red The light source is a High Emission Infrared LED with a wavelength peaking at 890 nm which reduces interferences caused by colored samples to 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 IR LED EMITTED LIGHT 890 nm CUVE...

Page 4: ...ughly agitated sample Allow sufficient time for bubbles to escape before securing the cap Note Do not overtighten the cap 1 4 0 5 cm FUNCTIONAL DESCRIPTION 1 Measurementcell 2 STO VIWkey tostoresampleafterreadingandviewlogmemory 3 READ DATE key to perform measurements and display toggle current date time 4 ALT key to activate the ALT functions orange keys 5 GLP CAL key to display toggle last calib...

Page 5: ... value of the original sample is derived by Ta Tn x 100 mL Vos where Ta actual turbidity value of the original sample Tn LP2000 11 reading of the diluted solution E g If Tn 27 Ta 27x 100 mL 15 mL 180 FTU Note Any sample above 1000 FTU will show out of range by blinking 1000 1 FTU 1 NTU Note Wipe the cuvet thoroughly with HI93703 70oralint freetissuebefore inserting it into the measurement cell The...

Page 6: ... press the STO button The last sample read will be storedinmemoryandthedisplaywill also show on the bottom right hand corner the reference number of the stored sample Note When the maximum number of samples has been reached 500 the displaywillshow FULL Thisisawarn ingthat youwillbeoverwritingtheoldest sample recorded To store the current sample presstheSTObuttonagainand thiswilloverwritetheoldests...

Page 7: ...tion settle prior to sampling It is recommended to calibrate the meter by using the supplied HI93703 10 10 FTU standard at least monthly or more frequently for greater accuracy Before inserting cuvets into the instrument wipe them with HI 93703 70 or a soft lint free tissue Handle vials so that no fingerprints are left on the areas where light passes through approx the bottom 2cm 3 4 If you experi...

Page 8: ... turbidity meter complies with the ISO 7027 International Standard and can effectively minimize errors due to colored dissolved substances This effect called True Color is a common interference for most commercially available instruments operating in the range of visible light Air bubbles and the effect of vibrations that disturb the surface of the sample may produce false results and should be av...

Page 9: ...In addition no special handling or disposal is required and a much higher stability of suspended particles has been observed On the other hand formazine is a toxic substance generated by a carcinogen withpoorstability particlesflocculateandsettlequickly Low concentrations change value within a few days or hours after dilution TheconsistencyofLP2000 11readingsbyusingbothstandardshasbeen separately ...

Page 10: ...f 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 Cus tomer Service department and then send it with shipping costs prepaid When shipping any instrument make sure it is properly packaged for complete protection Hanna Instruments reserves the ri...

Page 11: ... 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 SouthAfrica Tel 011 615 6076 Fax 011 615 8582 Taiwan Tel 886 2 2739 3014 Fax 886 2 2739 2983 Thailand Tel 66 2619 0708 Fax 66 2619 0061 UnitedKingdom Tel 01525 850 855 Fax 01525 853 668 USA Tel 401 765 7500 Fax 401 765 7575 For e m...

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