Hanna Instruments HI 93102 User Manual

Instruction Manual

HI 93102

Multiparameter

Turbidity &

Ion Specific Meter

www.hannainst.com

Dear Customer,
Thank you for choosing a Hanna Product.
Please read this instruction manual carefully

before using the instrument.
This manual will provide you with the necessary

information for correct use of the instrument, as
well as a precise idea of its versatility. If you
need more technical information, do not hesi­tate to e-mail us at [e-mail].

This instrument is in compliance with direc­tives.

TABLE OF CONTENTS

General Description .................................... 4

Principle of Operation .................................. 6

Functional Description................................. 9

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.

HI 93102 is supplied complete with:

• Glass cuvet with cap

• Batteries (4 x 1.5V AA)

• Instruction manual

The HI 731327 complete maintenance kit is
also available, including:

• 2 glass cuvets

• Primary calibration standards:
HI 93102-0 AMCO-AEPA-1 0 NTU* cali-

bration solution, 30 mL
HI 93102-20 AMCO-AEPA-1 20 NTU* cali-

bration solution, 30 mL

• HI 93703-50 cleaning solution, 230 mL

• Tissue for wiping cuvets

• Rugged carrying case

Specifications ........................................... 13

Operational Guide ..................................... 14

Cali bra tio n................................................. 22

Diagnostic Mode ....................................... 3 0

Logging with C 102.................................... 31

User-selectable Auto-off ............................ 33

Battery Replacement ................................ 34

Diagnostic Codes...................................... 35

Accessories.............................................. 36

Warranty ................................................... 38

CE Declaration of Conformity .................... 39

2

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.

* 1 NTU (Nephelometric Turbidity Unit) = 1 FTU (For-

mazine Turbidity Unit)

3

GENERAL DESCRIPTION

The Hanna HI 93102 is a portable micropro­cessor driven, multiparameter, turbidity and
ion specific meter. It measures Free & Total
Chlorine, Cyanuric Acid, pH, Iodine, Bromine,
Low Range Iron and Turbidity.

In the colorimetric mode, the user can select
either factory preprogrammed calibration set­tings or calibrate the meter using customized
calibration values based on the concentration
or relative absorbance of the sample. Calibra­tion data is also stored in a non-volatile
EEPROM.

In the turbidity mode, periodic recalibration of
the meter with primary standards according
to regulatory requirements or personal experi­ence is suggested. Turbidity ranges are 0.00-

9.99 NTU and 10.0-50.0 NTU.
HI 93102 complies with G.L.P. Standards

(Good Laboratory Practice), that is:

• When switched on, the LCD displays all
segments (display check).

• Battery status is monitored during every
measurement cycle warning the user if the
batteries become weak.

In addition, HI 93102 will turn itself off
before low voltage causes erroneous read­ings.

• It utilizes a real time clock and recalls
calibration data such as date, time and
calibration values.

There are eight keys for the different
operationals modes. The large Liquid Crystal
Display is dual-level: the upper level has four
digits and can display the measured param­eter in hundredths. The lower level has three
characters and indicates current mode (e.g.
F CL for free chlorine or TR for turbidity).
Different LCD segments indicate low battery,
logging mode, date, time, etc.

A pure green LED has been utilized as a light
source for both turbidimetric and colorimetric
measurements. A silicon photocell is used to
receive transmitted light from colorimetric chan­nel while another photocell receives scattered
light from the turbidimetric (nephelometric)
channel.

In order to measure colorimetric parameters,
all the operator has to do is zero the blank
sample and then add 1 packet of reagent (for
Bromine, Chlorine, Cyanuric Acid, Iodine and
Low Range Iron) or 0.2 mL of Phenol Red (for
pH). After placing the cuvet back in the meter
and pressing READ, the measurements are
shown directly on the LCD.

The instrument operates with four AA batter­ies and may be operator-programmed to turn
itself off automatically after 10, 20, 30, 40, 50
or 60 minutes of inactivity.

HI 93102 and all accessories such as sample
vials, reagent pillows, primary standards, can
be easily stored in the optional carrying case.

To facilitate field tests, the meter provides a
logging mode. In this mode, the user can
store up to twenty five time-tagged measure­ments in RAM and scroll the memory at any
time.

4

5

PRINCIPLE OF OPERATION

Turbidity Mode

HI 93102 has been designed to perform mea-

surements according to the USEPA’s 180.1
method and the Standard Method 2130B.

The instrument functions by passing a beam
of light through a vial containing the sample
being measured.

The light source is a Pure Green LED to
ensure that any interference caused by a
colored samples is minimized.

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 NTU* values.

Colorimetric Mode

The color of every object we see is deter­mined by a process of absorption and emis­sion of the electromagnetic radiation (light) of
its molecules.

Colorimetric analysis is based on the principle
that specific compounds react with others to
form a color, the intensity of which is
proportional to the concentration of the
substance being measured.

LED

EMITTED LIGHT

CUVET MICROPROCESSOR

Block diagram of an ion specific measurement

LIGHT

DETECTOR

When a substance is exposed to a beam of
light intensity Io, a portion of the radiation is
absorbed by the substance's molecules and
a radiation of intensity I, lower than Io, is
emitted.

The quantity of radiation absorbed is given by
the Lambert-Beer Law:

log Io/I = ελ c d

NTU units are equal to FTU units. However,
there are other known measurement units for
turbidity, namely the Jackson Turbidity Unit
(JTU) based on the old method of Jackson's
candle, and Silica Unit (mg / L of SiO2). The
conversion table between these measurement
units is shown below:

JTU NTU/FTU SiO2 (mg/L)

JTU 1 19 2.5

NTU/FTU 0.053 1 0.13

SiO2 (mg/L) 0.4 7.5 1

6

* 1 NTU = 1 FTU

Where log Io/I = Absorbance (A)

ελ= molar extinction coefficient of the

substance at wavelength λ

c = molar concentration of the

substance

d = optical distance light travels

through the sample

Since other factors are known, the concen­tration "c" can be calculated from the color
intensity of the substance determined by the
emitted radiation I.

An LED (Light Emitting Diode) emits radiation
at a relatively narrow spectrum, supplying the
system with the intensity Io.

7

A substance absorbs a color complimentary
to the color it emits. For example, a
substance appears yellow because it absorbs
blue light. As a result, the Hanna meters use
LED’s with specific wavelengths to measure
samples.

The optical distance (d) is measured by the
internal diameter of the cuvet containing the
sample.

The photoelectric cell collects the radiation I
that is not absorbed by the sample and
converts it into an electric current.

The microprocessor converts the value into
the desired measuring unit and displays it on
the LCD.

The measurement process is done in two
phases: setting the meter to zero and actual
measurement.

The cuvet is an optical element and hence
has an important role in the measurement
process. Both the measurement and the
calibration cuvets must be optically identical
to provide the same measurement conditions.

It is also important that the surface of the
cuvet is clean and free from scratches or
dents, in order to avoid measurement
interference due to unwanted reflection and
absorption of light.

It is recommended that wherever possible the
cuvet walls are not touched by the operator.

Furthermore, in order to maintain the same
conditions during the zeroing and the
measuring phases, it is necessary to close
the cuvets to prevent any contamination.

8

FUNCTIONAL DESCRIPTION

1) Primary
LCD: The four-digit LCD shows

all segments for several
seconds when the meter
is switched on. It then dis­plays four dashes to indi­cate “ready to measure”.
It is also the area where
the date, time and value
of last calibration are
shown. In “Read” and
“Zero” mode, “SIP” is
shown to indicate “Sample

9

In Progress”. The upper
level also indicates the
concentration or turbidity
of the sample, as well as
different diagnostic modes,
such as “-BA-” for low bat­tery.

2) Secondary
LCD: The three-digit LCD shows

the current mode of mea­surement that is “F CL”,
“tCL”, “CY”, “PH”, “Id”,
“Br”, “L FE”, “tr”, and di­agnostic or calibration
modes, such as “d11”,
“2 Fn”, “5c1”.

3) DATE: Indicates that the upper

level of LCD is showing
the current date, the date
of last calibration or the
date of logged measure­ment in memory.

4) TIME: Indicates that the upper

level of LCD is showing
the current time, the time
of last calibration or the
time of logged measure­ment in memory.

5) LOBAT: Blinking segment warns

user of low battery volt­age.

6) LOG: If intermittent, it indicates

that the user is in the scroll
mode viewing the logged
measurements. If fixed, it
indicates that the meter
is in the log mode and
every reading taken will be
stored in memory.

7) ON/OFF key: Turns the meter on and
off.

8) ZERO / key: In ion specific (colorimet­ric) mode, it zeros the
sample. In calibration and
diagnostic modes, it func­tions as ENTER (not used
in turbidity mode).

9) READ/ key: Takes the measuremnt of
concentration/turbidity of
the sample which is shown
on the LCD. In diagnostic
or calibration mode, shifts
the flashing digit to the
right.

10) CAL key: If pressed during calibra-
tion, the calibration proce­dure will be aborted and
the last calibration data will
be reinstated. If pressed
together with the ALT key
for less then 3 seconds,
the diagnostic mode will
be entered. If pressed to­gether with the ALT key
again, the meter will quit
diagnostic mode. If
pressed for more then 3
seconds, an intermittent
“CAL” prompt will appear
on the upper LCD level
and the calibration proce­dure is entered.

11) GLP/Abs key: In ion specific mode, it will
toggle concentration/ab­sorbance readings on the
upper LCD. In turbidity
mode, date, time and the
two calibration values of
the current mode will be

10

11

shown. If pressed in
time/date setup mode, the
meter will quit current
mode without making any
changes to current time/
date.

12) key Scrolls upwards through
the parameters to be mea­sured. In calibration/diag­nostic mode, increments
the blinking digit by one.
If pressed together with
ALT while the meter is in
logging mode, the upper
LCD will show the data
(date/time/value) in the
memory.

13) ALT key: Alternative functions.

14) key: Scrolls downwards through
the parameters to be mea­sured. In calibration/diag­nostic mode, decreases
the blinking digit by one.
If pressed together with
ALT while the meter is in
logging mode, the upper
LCD will show the current
lot number.

SPECIFICATIONS

HI 93102

Range Turbidity 0.00 to 50.0 NTU*

Bromine 0.00 to 8.00 mg/L

Free Cl

2

Total Cl

2

CYS 0 to 80 mg/L

Iodine 0.0 to 12.5 mg/L

LR Iron 0.00 to 1.00 mg/L

pH 5.9 to 8.5

Resolution

Turbidity 0.01 and 0.1 NTU*

Bromine 0.01 mg/L

Free Cl

2

Total Cl

2

CYS 1 mg/L

Iodine 0.1 mg/L

LR Iron 0.01 mg/L

pH 0.1

Accuracy

Turbidity ±0.5 NTU* or ±5% (whichever greater)

Bromine ±0.08 mg/L; ±3%

Free Cl

2

Total Cl

2

CYS ±1 mg/L; ±15%

Iodine ±0.1 mg/L; ±5%

LR Iron ±0.02 mg/L; ±3%

pH 0.1 pH
Light Source Pure Green LED
Light Source Life Life of the instrument
Light Detector Two Silicon Photocells
Power Source 4 x 1.5V AA alkaline batteries
Battery Life 60 hours or 1000 measurements
Auto-off Selectable after 10, 20, 30,

Environment 0 to 50°C (32 to 122°F)

Dimensions 220 x 82 x 66 mm

Weight 510 g (1.1 lb.)

0.00 to 2.50 mg/L

0.00 to 3.50 mg/L

0.01 mg/L

0.01 mg/L

±0.03 mg/L; ±3%
±0.03 mg/L; ±3%

40, 50 or 60 min. of non-use

RH max 95% (non-condensing)

(8.7 x 3.2 x 2.6")

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* 1 NTU = 1 FTU