Hanna Instruments LP 2000 User Manual

Instruction Manual

LP 2000

Precision Bench

Turbidity Meter

www.hannainst.com

Dear Customer,
Thank you for choosing a HANNA instruments® product.
Please read the instruction manual carefully before using the instru-

ment, to have all the necessary information for a correct use.
If you need additional technical information, do not hesitate to e-mail

us at [e-mail]
This instrument is in compliance with the directives.

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:

• Glass cuvet with cap

• Calibration solutions (HI 93703-0 AMCO-EPA-1 @0 FTU and
HI 93703-10 AMCO-EPA-1 @10 FTU), 30 mL each

• 12 Vdc power adapter and instructions

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.

TABLE OF CONTENTS

PRELIMINARY EXAMINATION ...................................................... 3

GENERAL DESCRIPTION .............................................................. 3

MEASURE UNITS ....................................................................... 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

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).

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.

* 1 FTU = 1 NTU

32

MEASURE UNITS

CUVET

LIGHT

D

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

FUNCTIONAL DESCRIPTION

1) Cuvette holder

2) Dual level LCD (Liquid Crystal Display)

3) ON/OFF key, to switch the meter ON and OFF

4) CAL key, to enter calibration mode

5) READ/, to perform measurements, and set the day and
month of the last calibration

6) DATE/ , to display the last calibration date, and select the



month or day of the last calibration

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.

DETECTOR

IR LED

EMITTED LIGHT (890 nm)

* 1 FTU = 1 NTU

90° SCATTERE

LIGHT

i) Socket for 12 Vdc power adapter

54