Hanna Instruments LP 2000 User Manual
Instruction Manual
LP 2000
Microprocessor-based
Bench Turbidity Meter
www.hannainst.com
This Instrument is in Compliance
with the CE Directives
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 directives.
TABLE OF CONTENTS
PRELIMINARY EXAMINATION ...................................................... 3
GENERAL DESCRIPTION .............................................................. 3
UNITS OF MEASURE .................................................................. 4
PRINCIPLE OF OPERATION ......................................................... 4
FUNCTIONAL DESCRIPTION ........................................................ 5
SPECIFICATIONS......................................................................... 6
OPERATIONAL GUIDE ................................................................. 7
CALIBRATION ........................................................................... 10
LCD AND ERROR CODES ........................................................... 13
ACCESSORIES ........................................................................... 14
WARRANTY .............................................................................. 14
CE DECLARATION OF CONFORMITY............................................ 15
2
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
• HI 93703-0 AMCO-EPA-1 calibration solution @0 FTU (30 mL)
• HI 93703-10 AMCO-EPA-1 calibration solution @10 FTU (30 mL)
• 12VDC Transformer (HI 710005 or HI 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 mark, in compliance with the European
directives, ensuring low emission values and accurate measurements
in presence of electromagnetic fields.
The meter is housed in a rugged and lightweight case, with an easyto-read LCD.
The meter is simple to use. All operations can be carried out with only
four keys and troubleshooting functions can be performed with error
codes on the display. An exclusive positive-locking system guarantees
that the cuvette is firmly placed in the cell. The keypad is waterresistant 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 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 FTU = 1 NTU
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
life of up to six months. Uncontaminated standards may be reused.
LP 2000 can be used with both AMCO-AEPA and formazine standards.
FTU is equal to the NTU. However, other known measurements
include: Jackson Turbidity Unit or JTU (based on the old method of
Jackson's candle), and Silica Unit in mg/L of SiO2. See the conversion
table below for these units:
JTU FTU/NTU SiO2 (mg /L)
JTU 1 19 2.5
FTU /NTU 0.053 1 0.13
SiO2 (mg / L) 0.4 7.5 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
a vial containing the sample being measured.
The light source is a High Emission Infrared LED with a wavelength
peaking at 890 nm, which reduces interference 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)
* 1 FTU = 1 NTU
LIGHT
DETECTOR
90° SCATTERED
CUVET
LIGHT
4
FUNCTIONAL DESCRIPTION
1) Cuvette Holder
2) Dual Level Liquid Crystal Display
3) ON/OFF
4) CAL, to enter the Calibration Mode
5) READ/▲, 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
i) Power Socket 12V to 20V DC
5
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