Hanna Instruments HI 93703-11 User manual

INSTRUCTION MANUAL
HI93703-11
Portable Logging
Turbidity Meter
with RS232

All rights are reserved. Reproduction in whole or in part is prohibited
without the written consent of the copyright owner, Hanna Instruments
Inc., Woonsocket, Rhode Island, 02895, USA.
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before
using the meter. For more information about Hanna
Instruments and our products, visit www.hannainst.com
or e-mail us at [email protected].
For technical support, contact your local Hanna Instruments
Office or e-mail us at [email protected].
Dear
Customer,

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TABLE OF CONTENTS
TABLE OF CONTENTS
1. PRELIMINARY EXAMINATION .................................................4
2. GENERAL DESCRIPTION.........................................................5
3. PRINCIPLE OF OPERATION.....................................................7
4. FUNCTIONAL DESCRIPTION....................................................8
5. SPECIFICATIONS...................................................................9
6. OPERATIONAL GUIDE..........................................................10
6.1. MEASUREMENT PROCEDURE......................................10
6.2. LOG-ON-DEMAND.....................................................12
6.3. CLEARING LOGGED DATA............................................13
6.4. VIEWING LOGGED DATA.............................................13
6.5. VIEWING AND SETTING DATE AND TIME......................14
6.6. ERROR CODES ..........................................................15
7. CALIBRATION .....................................................................18
7.1. CALIBRATION PROCEDURE.........................................18
7.2. VIEWING CALIBRATION DATE .....................................20
7.3. VIEWING FIRMWARE VERSION...................................20
7.4. ENSURE ACCURATE CALIBRATION...............................21
7.5. STANDARD SUSPENSION...........................................21
8. BATTERY REPLACEMENT ......................................................22
9. PC CONNECTION.................................................................23
10. ACCESSORIES...................................................................24
CERTIFICATION........................................................................25
RECOMMENDATIONS FOR USERS..............................................25
WARRANTY .............................................................................26

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PRELIMINARY EXAMINATION
1. PRELIMINARY EXAMINATION
Remove the meter from the packing material and examine it carefully.
For further assistance, please contact your local Hanna Instruments
Office or email us at [email protected].
Each HI93703-11 is delivered in rugged carrying case and is
supplied with:
• Glass cuvette with cap
• Batteries (4 x 1.5V AA)
• Instruction manual
Note: Ensure that the meter functions correctly and save all
packing material. Items that need to be returned must be
returned in their original packing material with the supplied
accessories.

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GENERAL DESCRIPTION
2. 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 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.
HI93703-11 also includes a real-time clock and log-on-demand
capability. The PC communication is made through a serial port of
your computer and the 5-pin socket on the meter.
Note: HI93703-11 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).
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.
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 cuvette 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 point calibration (0,10, 500 FTU*) can be easily
performed using available standards, and the last calibration date is
automatically stored for future retrivial.
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.
* 1 FTU = 1 NTU

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GENERAL DESCRIPTION
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: its standards have to be
prepared only a few minutes before performing the calibration, and
cannot be reused because of their short life. HANNA instruments®
standards are extremely stable, can be reused, and last up to six
months, if free from contamination.
HI93703-11 can be used with both standards.

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PRINCIPLE OF OPERATION
3. PRINCIPLE OF OPERATION
HI93703-11 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.
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:
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
* 1 FTU = 1 NTU

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FUNCTIONAL DESCRIPTION
4. FUNCTIONAL DESCRIPTION
1. Measurement cell
2. LCD (Liquid Crystal Display)
3. ON/OFF/CLR key, to turn the meter ON and OFF, and to clear
log memory
4. GLP/CAL key, to display last calibration date & time, and to
enter calibration mode
5. STO/VIEW key, to store sample after reading, and to view log
memory
6. READ/DATE key, to perform measurements, and to display
(toggle) current date/time
7. ALT key, to activate the second functions (second function keys
in orange)
8. RS232 connector (5 pin)

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SPECIFICATIONS
5. SPECIFICATIONS
Range 0.00 to 50.00 FTU*
50 to 1000 FTU*
Resolution 0.01 and 1 FTU*
Accuracy ±0.5 FTU* or
±5% of reading (whichever is greater)
Calibration 3 point (0, 10 and 500 FTU*)
Light Source Infrared LED
Light Source Life Life of the instrument
Light Detector Silicon photocell
Data Logging 199 measurements, on-demand
PC Connection Through serial port, using HI920011
connection cable and HI92000
Windows® compatible software
Battery Type 4 x 1.5V AA alkaline batteries
Battery Life Approx. 60 hours of continuous use or 900
measurements
Auto-off After 5 minutes of non-use
Environment 0 to 50°C (32 to 122°F);
RH max 95% non-condensing
Dimensions 220 x 82 x 66 mm
(8.7 x 3.2 x 2.6”)
Weight 510 g (1.1 lb.)
* 1 FTU = 1 NTU

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OPERATIONAL GUIDE
6. OPERATIONAL GUIDE
To prepare the instrument for taking measurements, first install
the batteries (see Battery Replacement section) 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.
6.1. MEASUREMENT PROCEDURE
• Turn the meter on by pressing the ON/OFF key.
• The meter will carry out a self-test displaying a full set of figures.
• 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 cuvette up to one quarter inch (0.5cm) from its rim
with the thoroughly agitated sample.