Hanna Instruments LP 2000-11 User Manual

Instruction Manual

LP2000-11

Precision Bench

Turbidity Meter

with PC Communication

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.

If you need additional technical information, do not hesitate to e-mail
us at [e-mail].

These instruments are 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.

LP2000-11 is supplied with:

• Glass cuvet with cap

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

• 12 Vdc power adapter and instruction manual

Note: Save all packing material until you are sure that the instrument

functions correctly. Any defective item must be returned in its
original packaging with the supplied accessories.

TABLE OF CONTENTS

Preliminary Examination ............................................................. 3

General Description ..................................................................... 3

Principle of Operation ................................................................. 4

Specifications.............................................................................. 5

Functional Description ................................................................. 6

Operational Guide ...................................................................... 7

Power Connection ........................................................ 7

Measurement Procedure ...................................................... 7

Storing samples in memory ................................................ 10

Clearing Logged Data........................................................ 10

Viewing Logged Data ........................................................ 11

Date and Time setup ......................................................... 11

Error Codes ....................................................................... 12

Ensure Accurate Measurements ........................................... 13

Sources of Interference ....................................................... 14

Calibration............................................................................... 14

Calibration Procedure ........................................................ 14

Viewing Calibration Date ................................................... 16

Ensure Accurate Calibration ................................................ 17

Standard Suspension ........................................................ 17

RS 232 Connection ................................................................... 18

Accessories ................................................................................ 18

Warranty................................................................................. 19

GENERAL DESCRIPTION

LP2000-11 turbidity meter is a bench top, microprocessor-based instrument
used to determine the turbidity of water and wastewater. The meter covers
a 0-1000 FTU range in two scales: 0.00 to 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 identical to the other internationally recognized
unit NTU (Nephelometric Turbidity Unit).

LP2000-11 is housed in a rugged and lightweight case, with an
easy-to-read LCD.

The meter is simply to use. All operations can be carried out with only
five keys and troubleshooting functions can be performed with
displayed error code guides. A positive-locking system guarantees that
the cuvet is firmly placed in the cell. The keypad is water-resistant

and can be wiped with a moist cloth for quick cleanups.
Two or three points calibration (0, 10, 500 FTU*) can be easily

performed using available standards.

* 1 FTU = 1 NTU

32

CUVET

LIGHT

D

In addition, LP2000-11 automatically stores the last calibration
date, that may be retrieved by a single key touch.

10 FTU* was chosen as the standard calibration point because its
value best fits the water turbidity measurements in a wide range of
applications, from drinking water to wastewater treatment.

Hanna uses the primary standard AMCO-AEPA-1 to avoid all formazine­related problems. In fact formazine is a toxic, unstable substance, which
requires particular care. Its standards have to be prepared only a few
minutes before performing the calibration, and cannot be reused because
of their short life.

Hanna standards are extremely stable, can be reused, and last up to six
months, if free from contaminations.

LP2000-11 can be used with both standards.

As noted above, 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

LP2000-11 has been designed to perform measurements according
to the ISO 7027 International Standards.

The instrument works by passing a beam of infrared light through a
vial containing the sample to be measured.

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.

DETECTOR

IR LED

EMITTED LIGHT (890 nm)

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.

90° SCATTERE

LIGHT

SPECIFICATIONS

Range 0.00 to 50.00 FTU*

50 to 1000 FTU*

Resolution 0.01 / 1 FTU*
Accuracy (@ 20°C/68°F) ±0.5 FTU*

±5% of reading (whichever greater)

Calibration 3 points (0, 10 and 500 FTU*)
Light Source High-emission infrared LED
Light Source Life Life of the instrument
Light Detector Silicon photocell
Power Supply 12 Vdc power adapter (included)
Environment 0 to 50°C (32 to 122°F);

RH max 95% non-condensing

Dimensions 230 x 170 x 70 mm

(9.1 x 6.7 x 2.7")

Weight 600 g (1.3 lb.)

* 1 FTU = 1 NTU* 1 FTU = 1 NTU

54

FUNCTIONAL DESCRIPTION

OPERATIONAL GUIDE

POWER CONNECTION

Plug the supplied 12 Vdc adapter into the proper instrument socket
and to the mains.

Note: Insure the main line is fuse protected.
Note: Always turn the meter off before unplugging it to ensure no

data is lost.

MEASUREMENT PROCEDURE

• Turn the meter on by pressing
the ON/OFF key.

• The meter will carry out a self-test
by displaying a full set of figures.

1. Measurement cell

2. STO/VIW key, to store sample after reading and view log memory

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 calibration date/time and
enter the calibration mode

6. ON/OFF/CLR key to switch the meter ON and OFF, and clear log
memory

7. Secondary LCD (displays the year when date is on the primary level,
the sample index when storing a value or viewing the log memory)

8. Primary LCD (Liquid Crystal Display)

i. 5-pin RS232 connector

ii. Power supply socket

• When the LCD displays “- - --” the
meter is ready to take measure­ments.

• Fill a clean cuvet up to 0.5 cm
(one quarter inch) from its rim
with the thoroughly agitated
sample.

1/4“

0.5 cm

• Allow sufficient time for bubbles to escape before securing the cap.

Note: Do not overtighten the cap.

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