Hanna Instruments HI 93703-11 User Manual
LOGGING
MICROPROCESSOR
TURBIDITY
METER
HI
93703-11
Instruction Manual
HI 93703-11
Portable Microprocessor
Turbidity Meter with
RS232
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HI 93703-11
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TURBIDITY METER
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http://www.hannainst.com
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These Instruments are 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.
This manual will provide you with the necessary
information for the correct use of the instrument, as well as a more precise idea of its
versatility.
This instrument is in compliance with the
directives EN 50081-1 and EN 50082-1.
TABLE OF CONTENTS
Preliminary Examination ............................ 3
General Description.................................... 3
Principle of Operation................................. 5
Functional Description................................ 6
Specifications ............................................ 7
Operational Guide ...................................... 8
Measurement Procedure ....................... 8
Log-on-demand ................................... 11
Cleaning Logged Data ......................... 11
Viewing Logged Data .......................... 12
Viewing and setting Date and Time ..... 12
Error Codes......................................... 13
Ensure Accurate Measurements............. 14
Sources of Interference....................... 15
Calibration................................................ 16
Calibration Procedure .......................... 16
Viewing Calibration Date ..................... 18
Ensure Accurate Calibration................ 18
Standard Suspension .......................... 19
Battery Replacement ............................... 20
RS 232 Connection .................................. 21
Accessories............................................. 22
Warranty .................................................. 22
CE Declaration of Conformity ................... 23
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.
HI 93703-11 is supplied complete with:
• 4 x 1.5V AA Size Batteries (4 ea.)
• Glass Cuvet
• Cap
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.
GENERAL DESCRIPTION
With HI93703-11 turbidity measurements can
be performed with high precision in the field as
well as in the laboratory. HI93703-11 turbidity
meter is a microprocessor-based, battery
operated instrument used to determine the
turbidity of water and waste-water. 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 of the instrument sets the
appropriate range for the measurement.
HI 93703-11 also includes a real-time clock,
log-on-demand and RS-232 capability. The serial
interface is through serial port (9-pin or 25-pin)
of an IBM-compatible computer and the 5-pin
socket on the meter.
Note: HI 93703-11 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).
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HI 93703-11 is a portable turbidity meter with
the mark, in compliance with the European
directives EN 50081-1 and EN 50082-1,
ensuring low emission values and accurate
measurements in presence of electromagnetic
fields.
The meter is housed in a rugged and lightweight
case, with an easy-to-read LCD. To save battery-life, the instrument is equipped with an
automatic shut-off feature which is activated
after 5-minutes of non-use. This feature is
disabled when the meter is connected to the
serial port of the computer.
HI 93703-11 is simple 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. In addition, HI 93703-11 automatically stores the last calibration date,
that may be retrieved by a single key touch.
We have chosen 10 FTU * as the standard
calibration point because it best fits the
water turbidity measurements in different
applications, from drinking water to wastewater treatment.
Hanna uses the primary standard AMCO-AEPA1 to avoid all formazine-related problems. 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 contamination. HI 93703-
11 can be used with both standards.
* 1 FTU = 1 NTU
4
PRINCIPLE OF OPERATION
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MICROPROCESSOR
TURBIDITY
METER
FUNCTIONAL DESCRIPTION
HI 93703-11 has been designed to perform
measurements according to the ISO 7027 International Standard.
The instrument functions by passing a beam of
infrared light through a vial containing the sample
being measured.
LIGHT
DETECTOR
IR LED
EMITTED LIGHT (890 nm)
90° SCATTERED
CUVET
LIGHT
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.
As noted above, FTU unit is equal to the NTU
unit. However, there are other known measurement units for turbidity: Jackson Turbidity Unit
(JTU) based on the old method of Jackson's
candle, and Silica Unit (mg/L of SiO2). For your
reference the conversion table between these
measurement units is shown below:
JT U 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
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* 1 FTU = 1 NTU
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1
2
LOG LOBAT
HI 93703-11
35
4
CLR
ON
OFF
CAL
GLP
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MICROPROCESSOR
TURBIDITY METER
188
VIEW
STO
DATE
READ
ALT
DATE
TIME
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1) Measurement Cell
2) LCD (Liquid Crystal Display)
3) ON/OFF key / CLR key, to clear log memory
4) GLP key, to display last calibration date/
time / CAL key, to enter the Calibration
Mode
5) STO key, to store sample after reading /
VIEW key, to view log memory
6) READ key, to perform measurements /
DATE key to display (toggle) current date/
time
7) ALT key, to activate the ALT functions
(second function keys in orange)
8) RS 232 5-pin connector
6
SPECIFICATIONS
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MICROPROCESSOR
TURBIDITY
METER
HI93703
Range 0.00 to 50.00 FTU *
50 to 1000 FTU *
Resolution 0.01 and 1 FTU *
Accuracy ±0.5 FTU*
±5% of reading
(whichever greater)
EMC Typical ±2% Full Scale
Deviation
Light Source High Emission Infrared LED
Light Source Life Life of the instrument
Light Detector Silicon Photocell
OPERATIONAL GUIDE
To prepare the instrument for taking
measurements, first install the batteries (see
Battery Replacement section on page 20) and
then turn the instrument on.
To maximize battery-life, the display is
automatically switched off after 5-minutes of
non-use. To reactivate the display, simply press
the ON/OFF key.
MEASUREMENT PROCEDURE:
HI 93703-11
CLR
VIEW
• Turn the meter on by
pressing the ON/OFF
key.
ON
OFF
CAL
GLP
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MICROPROCESSOR
TURBIDITY METER
STO
DATE
READ
ALT
Power Source 4 x 1.5V AA alkaline batteries
Battery Life 60 hours or 900 measurements
Auto-Shut off After 5 minutes
Operating 0 to 50
°
C (32 to 122°F);
Conditions 0 to 95% RH (non-condensing)
Dimensions 220 x 82 x 66 mm
(8.7 x 3.2 x 2.6")
Weight 510 g (18 oz.)
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* 1 FTU = 1 NTU
• The meter will carry
out a self-test displaying a full set of figures.
LOG LOBAT
• The meter will carry
out a battery test showing in percentage the
battery life left.
• When the LCD displays “--- -” the meter
is ready to measure.
• Fill a clean cuvet up to one quarter inch (0.5 cm) from its rim with
the thoroughly agitated sample.
• Allow sufficient time for bubbles
to escape before securing the cap.
Note: do not overtighten the cap.
8
188
98
ba
DATE %
TIME
1/4“
%
0.5 cm
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