Hanna Instruments | HI98713-01 | Owner Manual | Hanna Instruments HI98713-01 Owner Manual

Hanna Instruments HI98713-01 Owner Manual
Instruction Manual
HI98713
ISO Portable Turbidimeter
www.hannainst.com
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Dear Customer,
Thank you for choosing a Hanna Instruments product.Please read this instruction manual carefully
before using this instrument.This manual will provide you with the necessary information for correct
use of this instrument, as well as a precise idea of its versatility.If you need additional technical
information, do not hesitate to e‑mail us at tech@hannainst.com or view our worldwide contact
list at www.hannainst.com.
WARRANTY
HI98713 is warranted for two years against defects in workmanship and materials when used for
its intended purpose and maintained according to instructions. This warranty is limited to repair
or replacement free of charge.
Damage due to accidents, misuse, tampering or lack of prescribed maintenance is not covered.
If service is required, contact your local Hanna Instruments Office. If under warranty, report the model
number, date of purchase, serial number and the nature of the failure. If the repair is not covered
by the warranty, you will be notified of the charges incurred. If the instrument is to be returned to
Hanna Instruments, first obtain a Returned Goods Authorization number from the Technical Service
Department and then send it with shipping costs prepaid. When shipping any instrument, make
sure it is properly packed for complete protection.
To validate your warranty, fill out and return the enclosed warranty card within 14 days from the
date of purchase.
TABLE OF CONTENTS
WARRANTY.............................................................................................................................................................2
PRELIMINARY EXAMINATION....................................................................................................................................3
GENERAL DESCRIPTION............................................................................................................................................4
TAG IDENTIFICATION SYSTEM...................................................................................................................................5
ABBREVIATIONS......................................................................................................................................................5
PRINCIPLE OF OPERATION........................................................................................................................................6
MEASUREMENT UNITS.............................................................................................................................................7
FUNCTIONAL DESCRIPTION.......................................................................................................................................8
SPECIFICATIONS....................................................................................................................................................11
GENERAL TIPS FOR AN ACCURATE MEASUREMENT...................................................................................................12
MEASUREMENT PROCEDURE..................................................................................................................................19
CALIBRATION PROCEDURE......................................................................................................................................22
LOGGING...............................................................................................................................................................26
GOOD LABORATORY PRACTICE (GLP)........................................................................................................................29
SETUP 31
LCD BACKLIGHT.....................................................................................................................................................35
TAG INSTALLATION................................................................................................................................................35
LED REPLACEMENT................................................................................................................................................36
BATTERIES MANAGEMENT......................................................................................................................................36
PC INTERFACE.......................................................................................................................................................38
ERROR CODES.......................................................................................................................................................38
ACCESSORIES........................................................................................................................................................39
RECOMMENDATIONS FOR USERS............................................................................................................................39
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.
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PRELIMINARY EXAMINATION
Please examine this product carefully. Make sure the instrument is not damaged. If any damage
has occurred during the shipment, please contact your local Hanna Instruments Office.
This HI98713 Portable Turbidimeter is supplied complete with:
• Five Sample Cuvettes and Caps
• Four Calibration Cuvettes (HI98713-11)
• Silicone Oil (HI93703-58)
• Tissue for wiping the cuvettes
• Five Tag holders with Tags (HI920005)
• Batteries (4 pcs.)
• AC Adapter
• Instruction Manual
• Quick Reference Guide
• Instrument Quality Certificate
• Rigid carrying case
Note: Save all packing material until you are sure that the instrument works correctly. Any defective
item must be returned in the original packing with the supplied accessories.
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GENERAL
DESCRIPTION
GENERAL DESCRIPTION
HI98713 is a high accuracy ISO compliant portable turbidimeter that benefits from Hanna Instruments’
years of experience as manufacturer of analytical instruments. The HI98713 meets and exceeds the
requirements of the ISO 7027 for water quality.
The instrument is specially designed for water quality measurements, providing a reliable and accurate
reading on low turbidity values.
The HI98713 instrument measures the turbidity of a sample in the 0.00 to 1000 FNU (Formazin
Nephelometric Units) range. An effective algorithm calculates and converts the detectors output in FNU.
Depending on the measured probe and needed accuracy, normal measurement, continuous measu‑
rement, or signal averaging measurement can be selected.
The instrument is based on a state-of-the-art optical system, which guarantees accurate results. The
optical system, consisting in an infrared LED and two detectors (scattered and transmitted light),
assures long term stability and minimizes stray light and color interferences. It also compensates for
variations in intensity of the LED, minimizing the need of frequent calibration.
The 25 mm round cuvettes made from special optical glass guarantee the repeatability and consistency
of the measurements.
Calibration can be easily performed at any time in two, three or four points (<0.1, 15, 100 and 750
FNU-adjustable calibration points), using the supplied or user prepared standards.
HI98713 has complete GLP (Good Laboratory Practice) functions that allows traceability of the calibra‑
tion conditions. The last calibration points, time and date can be checked at any time by a single touch.
HI98713 has a very user-friendly interface, with an easy to read, large LCD (Liquid Crystal Display).
The displayed codes guide the user step by step with routine operation and through calibration.
Confirmation and acoustic signals help the user during instrument operation.
The HI98713 turbidimeter is a truly splash proof portable instrument. It is supplied with a rigid
carrying case that offers protection for harsh environments.
One battery set is enough for at least 1500 measurements. The battery charging percentage and low
battery condition are displayed on the LCD to avoid unexpected battery failure. In order to save the
battery life, the instrument has an auto shut-off feature and will turn off after 15 minutes of non-use.
In addition, the instrument is equipped with backlight and the current time is continuously displayed
on the LCD.
The instrument also provides a logging function. Up to 200 measurements can be stored in the internal
memory and consulted at any time. Data can be downloaded to a PC for storing or further analysis
through one of the two available ports: RS232 or USB.
For advanced field applications, the HI98713 turbidimeter is equipped with Tag Identification System
(TIS) that makes data collecting and management simpler than ever.
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TAG IDENTIFICATION SYSTEM
Hanna Instruments is the first manufacturer of turbidity instruments that has decided to add the
unique T.I.S. - Tag Identification System to our Portable Turbidimeters, to meet the more restrictive
needs of the users and fit all advantages of this system to the turbidity measurements and data
management.
The system is designed for scientific and industrial applications, or to prove during safety audits
and inspections that samples have been truly taken on pre-established locations.
The system is as easy to install as to operate. Just fix the so-called iButton® tags near your sampling
sites that need to be checked often, and with this the T.I.S. is setup. The tag contains a computer
chip embedded in a durable stainless steel can. It is designed to withstand the harsh environments,
indoors or outdoors. The number of tags that can be installed is practically unlimited, because each
tag has a unique identification code.
Immediately after tags installation you can start collecting data. Use the Portable Turbidimeter to take
measurements and memorize the test result by pressing the Log-on-Demand key. Then, the instrument
will ask for the tag identification. Simply touching the iButton® with the matching connector on the
Portable Turbidimeter does identify and authenticate logging, by storing the iButton® serial number,
time and date stamp.
The power of the T.I.S. features resides in the PC application. Download all test data to your PC
and use our HI92000 Windows® compatible application software for further data management. You
can sort or filter all your collected test data on different criteria like on a specific sampling location,
parameter, date and time intervals, or fix range to filter measured values. The data can be plotted
in a graph, exported to other common Windows® applications or printed for reporting purpose.
It is also possible to add new tags later on, thus increasing an already existing database. Each time
the PC software recognizes a new added tag, it will ask for a description of the new sampling location.
ABBREVIATIONS
FNU
LCD
RTC
RH
TIS
ID
ISO
Formazin Nephelometric Units
Liquid Crystal Display
Real Time Clock
Relative Humidity
Tag Identification System
Identification
International Standard Organization
iButton® is registered Trademark of “MAXIM/DALLAS semiconductor Corp.”
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PRINCIPLE OF OPERATION
Turbidity of the water is an optical property that causes light to be scattered and absorbed, rather
than transmitted. The scattering of the light that passes through a liquid is primarily caused by the
suspended solids. The higher the turbidity, the greater the amount of scattered light. Because even
the molecules in a very pure fluid scatter light to a certain degree, no solution will have zero turbidity.
The ISO 7027 standard specifies the key parameters for the optical system to measure turbidity for
drinking and surface water, using the formazin based metric method.
The HI98713 Portable Turbidimeter is designed to meet or exceed the criteria specified by the
ISO 7027 standard.
The light beam that passes through the sample is scattered in all directions. The intensity and pattern
of the scattered light is affected by many variables like wavelenght of the incident light, particle size,
shape, refractive index and color.
The Hanna Instruments’ HI98713 is based on a state-of-the-art optical system that guarantee both
high performance and reliable results.
This optical system includes an infrared LED, a scattered light detector (900) and a transmitted light
detector (1800). The microprocessor of the instrument calculates from the signals that reaches the
two detectors, the FNU value, using an effective algorithm. This algorithm corrects and compensates
for interferences of color, making the HI98713 turbidimeter color-compensated.
The optical system and measuring technique allow the compensation of LED intensity fluctuations,
minimizing the need of frequent calibration.
The lower detection limit of a turbidimeter is determined by the so called “stray light”. Stray light
is the light detected by the sensors, that is not caused by light scattering from suspended particles.
The optical system of HI98713 turbidimeter is designed to have very low stray light, providing accurate
results for low turbidity samples. However, special care must be taken when measuring low turbidities
(see General Tips for an Accurate Measurement for sample preparation and measuring techniques).
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MEASUREMENT UNITS
Many methods were used to measure turbidity over the years. The Jackson Candle Turbidimeter was
used to measure turbidity as Jackson turbidity units (JTU). The Secchi Disk is commonly used to
measure turbidity in lakes and other deep waters (mg/L SiO2). Both methods are visual and are not
considered very accurate. To obtain more accurate readings a formazin based meter should be used
as a turbidity reading instrument.
The HI98713 turbidimeter reports the measurements only in FNU (Formazin Nephelometric Units).
The conversion table between these measurement units is shown bellow:
JTU
FNU/FTU/
NTU
SiO2
(mg/L)
JTU
1
19
2.50
FNU
FTU
NTU
0.053
1
0.13
SiO2
(mg/L)
0.4
7.5
1
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FUNCTIONAL DESCRIPTION
INSTRUMENT DESCRIPTION
1) Cuvette Lid. Close the cuvette lid prior to start a measurement.
2) Cuvette Holder. Insert the cuvette into the holder with the cuvette mark matching the case
mark.
3) Liquid Crystal Display (LCD). The LCD has backlight for better visibility in dark environments.
4) Keypad. Splash proof resistant.
5) LED connector. Connect the new LED using a screwdriver during LED changing procedure.
6) LED. Replaceable infrared LED.
7) Battery Lid. Remove the battery lid in order to change batteries or replace the LED.
KEYPAD DESCRIPTION
HI 98713
ON / OFF
GLP
ISO Turbidimeter
CAL
LIGHT
RCL
LOG / CFM
AVG
READ
Fast Tracker
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8) ON/OFF, press to turn the instrument ON/OFF. If no key is pressed for more than 15 minutes,
the instrument automatically shuts off.
9) GLP , press to enter/exit GLP feature. In SETUP it is used to increase the set values. In Log
Recall it is used to select a newer record (scroll up).
10) AVG , press to set the average reading mode ON/OFF. In SETUP it is used to decrease the
set values. In Log Recall it is used to select an older record (scroll down).
11) CAL, press to enter/exit calibration. During setup it is used to start/stop editing a parameter.
12) LIGHT, press to turn ON/OFF the backlight.
13) RCL, press to enter/exit viewing log content.
14) LOG/CFM, press to save the log records or to confirm the selected option.
15) READ , press to start a measurement. Press and hold READ to make a continuous measurement.
In Log Recall it is used to see the content of a record. In GLP it is used to see all available
informations. In SETUP, during date or time editing, it is used to move the focus on the next
setting item.
16) SETUP/DEL, press to enter/exit setup. The DEL function is available in Log Recall to delete one
or all records. In GLP it is used to delete the user calibration.
CONNECTORS DESCRIPTION
17) AC adapter connector, used to connect an external AC Adapter.
18) RS232 connector, used to transfer data through the RS232 connection. Use HI920011 serial
cable to connect to the PC.
19) Tag reader connector. Touch the tag with the connector to read the location identification
number during logging.
20) USB connector, used to transfer data to the PC.
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DISPLAY DESCRIPTION
1) Battery icon. When it is ON, it shows that the instrument works on battery. When blinking,
the batteries are almost empty and need to be replaced.
2) Wait icon. It is displayed when the instrument performs an internal checkup.
3) Measurement icon. The icon shows the measuring scheme of the instrument.
4) LED icon. The LED icon is shown when the LED is turned on.
5) Four digit main display. The main display shows the turbidity value after one measurement.
Depending on the instrument working mode, other values or messages are displayed.
6) Measurement units. The turbidity is measured in FNU. When average or continuous mode is
selected, the “FNU” tag blinks for each new displayed value. For conversions in other units
see Measurement Units section.
7) AVG icon. When selected, the measurement will be taken in average mode. The “FNU” tag
will blink for each new displayed value.
8) Four digit secondary display. The secondary display shows the current time (if selected) or other
values/messages.
BEEPER
A beeper is used to make the user interface more friendly. An error or invalid key press is signaled
by a long beep. A confirmation beep is signaled by a short beep. The beeper is selectable as ON
or OFF in Setup Menu.
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SPECIFICATIONS
Range
Range Selection
Resolution
Accuracy
Repeatibility
Stray Light
Typical EMC Deviation
Light Source
IR Detector
Method
Display
Standards
Calibration
LOG Memory
Serial Interface
Environment
Power supply
Auto Shut-off
Dimensions
Weight
0.00 to 9.99 FNU
10.0 to 99.9 FNU
100 to 1000 FNU
Automatically
0.01 FNU from 0.00 to 9.99 FNU
0.1 FNU from 10.0 to 99.9 FNU
1 FNU from 100 to 1000 FNU
±2% of reading plus 0.1 FNU
±1% of reading or 0.01 FNU, whichever is greater
< 0.1 FNU
±0.05 FNU
860 nm infrared LED
Silicon Photocell
Adaptation of ISO 7027, ratio method with 90° and 180° detector.
60 x 90 mm LCD with backlight
< 0.1, 15, 100 and 750 FNU
Two, three or four point calibration
200 records
RS232 and USB 1.1
0 to 50°C (32 to 122°F); max 95% RH non-condensing
4 x 1.5V AA alkaline batteries or AC adapter
After 15 minutes of non-use
224 x 87 x 77 mm (8.8 x 3.4 x 3.0”)
512 g (18 oz.)
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GENERAL TIPS FOR AN ACCURATE MEASUREMENT
HI98713 is a highly accurate turbidimeter. To meet the instrument performance and fully benefit of
its properties it is very important that the analyst perform accurate, precise and repeatable readings
using proper measurement techniques. Special care must be taken during sample preparation and
handling.
The instructions listed below should be carefully followed during measurement and calibration to
ensure best accuracy.
CUVETTE
The cuvette is part of the optical system in all measurements. The light reaches the sample by passing
through the cuvette glass. As a result, the measurement can be affected by the glass imperfections,
dirt, dust, scratches, or fingerprints present on the cuvette surface.
CUVETTE HANDLING
The cuvettes should be free of scratches or cracks. Any cuvette with visible scratches will be discarded.
The cuvettes should be periodically washed with acid. After washing, the cuvettes should be well
rinsed many times with distilled or deionized water. Allow cuvettes to air-dry and store them for
long periods of time with caps, to avoid dirt entering inside. Always handle the cuvette by touching
only the cap or its top side (over the horizontal line).
Always store the cuvettes in separate boxes or with separators between them to avoid scratches
on the surface.
CUVETTE PREPARATION
Whenever a cuvette is used, it must be clean inside and outside. When it is placed into the instrument,
it must be dry outside, completely free of fingerprints or dirt.
If the cuvette is not indexed, put the cuvette with the factory mark aligned with the sign on the
instrument top.
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CUVETTE OILING
To hide minor imperfections and scratches, the cuvettes should be oiled outside with the supplied
silicone oil. This is very important, especially for low turbidity samples (< 1 FNU), otherwise
scratches can contribute and alter turbidity readings.
The silicone oil has the same refractive index as the glass and will not alter the turbidity readings.
It is important to apply only a thin layer of silicone oil.
Warning: Do not apply the oil in excess, it may retain dirt or contaminate the cuvette holder of the
instrument, altering the turbidity readings.
It is very important to apply the silicone oil on a clean, dry cuvette. Apply a few drops of oil and wipe
the cuvette thoroughly with a lint-free cloth. Wipe off the excess of oil till you obtain a thin, uniform
layer. If the procedure is correctly followed, the cuvette should appear nearly dry with no visible oil.
Note: The supplied cloth for oiling should be stored together with the silicone oil bottle and cuvettes,
taking care to avoid contamination with dirt. After a few oiling procedures the cloth will contain
enough oil to wipe the bottle with it without adding more oil. From time to time add some
drops of oil on the cuvette to provide the necessary oil quantity in the cloth.
INDEXING A CUVETTE
It is very important for low turbidity readings to always insert the cuvette into the instrument in
the same position.
All cuvettes are factory indexed. This index can be used to put the cuvette with the factory mark on
the cuvette aligned with the sign on the instrument top.
To further reduce the effect of glass imperfections, the cuvette can be indexed and use this new index
as the position mark.
For indexing one cuvette or matching multiple cuvettes the continuous reading mode is suggested.
In this mode if READ is kept pressed, multiple successive readings are taken without turning off
the LED. After first reading is displayed, it is possible to open the cuvette lid and rotate the cuvet te
without generating an error condition. The turbidity is immediately displayed, reducing drastically the
measurement time. The LED of the instrument will turn off only when READ is released.
Note: The instrument can not perform continuous readings if the average mode is on.
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In order to index a cuvette follow the next steps:
• Fill the cuvette with high quality water (<0.1 FNU) up
to the line.
• Clean and oil the cuvette as described before.
• Turn the instrument ON.
• Insert the cuvette into the instrument and press
READ . Record the reading.
• Open the instrument lid, slightly rotate the cuvette and
take a new reading.
• Repeat the last step until you read the lowest FNU
value. Alternatively, keep READ pressed and, after
the first value is displayed, open the lid and start
rotating the cuvette until the lowest FNU value is
displayed.
• Mark this position on the thicker white band on the
top of the cuvette with a water resistant pencil.
• Always use this position to align it with the sign on
the instrument top.
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MATCHING MULTIPLE CUVETTES
Precise measurements require the use of a single cuvette. If it is not possible, the cuvet selection
and matching must be performed before taking measurements.
In order to match multiple cuvettes follow the next steps:
• Fill some cuvettes with high quality water (<0.1
FNU) up to the line.
• Clean and oil the cuvettes as described before.
• Turn the instrument ON.
• Insert the first cuvette into the instrument and press
READ . Record the reading.
• Record the position of the cuvette and the displayed
reading.
• Mark this position on the thicker white band on the
top of the cuvette with a water resistant pencil.
• Insert the second cuvette into the instrument and
take a reading.
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• Open the instrument lid, slightly rotate the cuvette and take a new reading.
• Repeat the last step for the second cuvette until the reading is within 0.01 FNU of the value
obtained for the first cuvette.
• Alternatively, keep READ pressed and, after the first value is displayed, open the lid and start
rotating the cuvette until the displayed value matches the first cuvette.
• Mark this position on the second cuvette with a water resistant pencil.
• Follow the same procedure for all the necessary cuvettes.
Note: If the cuvette is indexed, use the index to position it in the instrument.
SAMPLING TECHNIQUE
When taking turbidity measurements it is very important to select a representative sample. For
consistent results, follow the next tips when sampling:
• Gently mix the water before taking the sample.
• If the sample is taken from a pipe, discard the first few liters.
• If measuring a non uniform source, collect samples from different places and mix them.
When measuring the collected sample, keep in mind the following:
• Samples should be analyzed immediately after collection because the turbidity can change in time.
• To avoid dilution of the sample it is better to rinse the cuvette with a quantity of sample and then
discard. Only after this you can fill the cuvette with sample.
• Pay attention that cold samples do not condense on the sample cell.
REMOVING AIR BUBBLES
Any air bubbles present in the sample will cause high turbidity readings. To obtain accurate
measurements, remove the air bubbles using one of these methods:
• Application of a partial vacuum;
• Addition of a surfactant, such as Triton X-100;
• Use of an ultrasonic bath;
• Heating the sample.
Sometimes it is necessary to combine two or more methods for efficient air bubble removal.
Note: Each method can alter the sample turbidity, if misused, so they have to be used with caution.
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APPLICATION OF VACUUM
Vacuum works by decreasing the atmospheric pressure. In this way the bubbles from the solution
came out to the surface.
Application of vacuum is a very simple procedure and can be applied with any vacuum source at hand.
The simplest equipment at hand is a syringe and a rubber stopper for vacuum degassing.
Notes: • Pay attention that the vacuum equipment be clean and oil-free.
• It is not recommended to apply vacuum to a viscous sample that contains volatile com‑
ponents. In such cases the vacuum can determine the volatile component of the viscous
sample to increase the bubbles from the sample.
ADDITION OF SURFACTANT
Surfactant addition works by changing the surface tension of the water. In this way bubbles are released
from the sample. This method is effective in samples that are supersaturated with air.
The procedure consists in the addition of a drop of surfactant in the cuvette before adding the sample
to be analyzed.
A convenient surfactant to use for degassing is Triton X-100.
Warning: Pay attention that changing the surface tension will cause a rapid settling of particles that
cause turbidity. To avoid this problem, analyze as soon as possible the sample.
Do not shake vigorously the sample because the surfactant may foam. If you are using the same
cuvette, rinse it before adding a new sample in order to avoid surfactant accumulation.
Surfactant contribution to the turbidity readings is negligible.
Note: Surfactant addition should be used for degassing only when other methods are ineffective.
USE OF AN ULTRASONIC BATH
The ultrasonic waves are very effective in removing air bubbles from samples. However, ultrasonic
waves should be used with care because they can alter sample turbidity characteristics, by modifying
the shape and size of particles which cause turbidity. The ultrasonic waves can also break the existing
air bubbles, leading to a complication of the degassing process.
In order to avoid excess application of the ultrasonic waves you can apply ultrasound until all visible
air bubbles are removed, and then measure the sample turbidity. This is the most used procedure
for degassing.
If you are not sure that all air bubbles were removed, apply ultrasonic waves again for a short period
of time and then measure the turbidity. Repeat this procedure until the turbidity is increasing instead
of decreasing, sign that turbidity of the sample was altered.
In order to degas a sample fill a clean cuvette with sample and immerse it (1/2 to 2/3 immersed)
in an ultrasonic bath. Follow the degassing procedure described above. Only after the degassing
procedure is finished, the cuvette can be capped.
17
HEATING THE SAMPLE
Use of heat to remove air bubbles, although very effective in some cases, should be handled with
care because it can alter the turbidity of the sample. When heating a sample, the volatile components
from the sample can vaporize, the suspended components can dissolve or the sample characteristics
can change.
Therefore, the heating procedure should be used with extreme care.
The best way is to use a warm water bath and immerse the cuvette with sample into the bath. Heat
the sample only until the visible bubbles are removed.
Note: Always cool the heated sample to the original sample temperature before measurement.
The heating procedure can be used in combination with vacuum or ultrasonic waves application for
a more effective air bubble removal.
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MEASUREMENT PROCEDURE
When taking any turbidity measurements several basic rules should be followed:
• Use always cuvettes without scratches or cracks because they can cause inaccurate readings.
• Cap always the cuvettes to avoid spillage of the sample into the instrument.
• Close always the lid of the instrument during measurement.
• Keep the lid of the instrument closed when it is not used to prevent dust or dirt entering.
• Put always the instrument on a flat, rugged surface when taking measurements.
• Do not operate in direct sunlight.
• Do not use too much oil to prevent contamination of the optical system.
To take turbidity measurements, follow the next steps:
• Turn the instrument ON by pressing ON/OFF.
When dashes are displayed on the LCD, the
instrument is ready. On the secondary LCD the
current time appears, if selected in SETUP menu.
• Fill a clean, dry cuvette with 10 mL of sample up
to the mark, taking care to handle the cuvette
by the top.
• Replace the cap.
• Wipe the cuvette thoroughly with a lint-free
cloth to remove any fingerprints, dirt or water
spots.
• Apply silicone oil on the cuvette and wipe with
a lint-free cloth to obtain an even film over the
entire surface of the cuvette.
Note: It is very important to oil the cuvette, especial‑
ly for low turbidity values (< 1 FNU) to hide
the glass imperfections that can influence
the reading.
• Place the cuvette into the instrument. Align
the mark from the cuvette with the sign on the
instrument case and close the lid.
Note: If you have a cuvette with orientation mark,
place the cuvette into the instrument with
the orientation mark aligned with the sign
on the instrument top.
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NORMAL MEASUREMENT
This type of measurement can be used for regular measurements, when the sample is stable and
normal accuracy is required. In normal measurement mode, the led is ON for a minimum period of
time (about 7 seconds), saving the battery life. Normal measurement takes about 10 seconds.
If normal measurement is selected, the “AVG” tag will not be displayed.
• Press READ to start the measurement.
The display will show blinking dashes and
the icons for cuvette, detectors and LED will
appear during measurement.
At the end of the measurement, the instrument
directly displays turbidity in FNU.
CONTINUOUS MEASUREMENT
This measurement mode can be used when many measurements have to be taken in a short period
of time. The feature is also useful to evaluate a very fast settling sample. This measurement mode is
recommended for indexing cuvettes. After the first reading is taken, the lid opening will not generate
any errors.
The first value is displayed after about 10 seconds and then a new reading is displayed each second.
In order to make a continuous measurement keep READ pressed until the desired number of
measurements are taken. The display will show blinking dashes and the icons for cuvette, detectors
and LED will appear. When a new value is displayed, the cuvette icon and the measurement unit
will briefly blink.
The last value remains on the display after the READ is released.
AVERAGED MEASUREMENT
Select this measurement mode when samples that cause unstable readings are analyzed. By averaging
several readings, the random noise generated by the sample is reduced and accurate measurements
can be taken.
This mode can also be selected when high accuracy measurements are desired. In the average mode
10 measurements are averaged in a short period of time (about 20 seconds). The initial value is
displayed after 10 seconds and the display is updated every second with an intermediate value.
• To select the averaged measurement mode press
AVG .
When this mode is selected, the AVG icon will
be displayed on the LCD.
20
• Press READ
to start the average reading
mode. The display will show blinking dashes
and the icons for cuvet, detectors and LED will
appear during measurement. When a new
partial value is displayed, the cuvet icon and
the measurement unit will blink shortly.
When the measurement is ended, the final
averaged result is displayed directly in FNU.
RANGE AND UNITS
HI98713 automatically selects the correct range
to display the results with the highest accuracy.
If the measured value is higher than 1000 FNU
(over range), the display will show the maximum
value blinking.
21
CALIBRATION PROCEDURE
HI98713 has a powerful calibration function that compensates for LED aging or changing. The
calibration can be done using the suplied calibration solutions or user prepared standards.
HI98713 turbidimeter is supplied with 4 AMCO standards: <0.1 FNU, 15 FNU, 100 FNU and
750 FNU. The Hanna Instruments standards are specially designed for this instrument. The turbidity
standards have a shelf life and should not be used after the expiration date.
Alternatively, formazin standards can be used. It is recommended that the prepared calibration solutions
to be close to the default calibration points.
The first point should be near 0 FNU. The second point can be chosen between 10 and 20 FNU, the
third point between 50 and 150 FNU and the fourth point between 600 and 900 FNU.
FORMAZIN PREPARATION
In order to prepare formazin 4000 FNU stock solution, follow the next procedure:
Solution I Dissolve 1.000 grams of hydrazine sulfate, (NH ) H SO , in distilled, deionized water
and dilute to 100 mL in a volumetric flask.
Warning: Handle hydrazine sulfate with care because it is a carcinogen reagent. Avoid inhalation,
ingestion, or skin contact. Formazin solution can also contain some hydrazine traces.
Solution II Dissolve 10.000 grams of hexamethylenetetramine, (CH2) N , in distilled, deionized
water and dilute to 100 mL in a volumetric flask.
Stock solution Mix 10 mL Solution I and 10 mL Solution II in a flask. Let the stock solution
stays 48 hours at 25±3°C (77±5°F). This will result in a 4000 FNU formazin suspension. It is
very important for the formation of the formazin polymer to maintain the same temperature.
The stock solution (4000 FNU) can be stored up to one year in proper conditions. Store formazin in
amber glass bottle or any UV-light blocking bottle.
To obtain a high quality formazin always use pure reagents and high-purity water.
To prepare the calibration standards, dilute the stock solution with the same high-purity water you
used for the preparation of the stock solution.
The diluted formazin solutions are not stable. They should be used immediately after preparation and
discard immediately after use.
If the prepared formazin is used, enter the actual standard value by pressing UP or DOWN key to edit
the value of the second, third or fourth calibration point.
2 2
2
4
6
4
CALIBRATION
For best results, the measurement techniques must be followed during calibration. If formazin standards
are used, mix the cuvettes gently for about 1 minute and then allow the standard to settle for one
more minute before calibration.
Calibration can be performed in two, three or four points. It is possible to interupt calibration procedure
at any time by pressing CAL or ON/OFF.
22
TWO-POINT CALIBRATION
• Turn the instrument on by pressing ON/OFF.
When the LCD displays dashes, the instrument
is ready.
• Enter calibration mode by pressing CAL.
The display will show “CAL P.1” and no sug‑
gested value. This first point is used to check
the optical system.
• Place the <0.1 FNU standard cuvette into
the holder and ensure that the cuvette mark is
aligned with the sign on the instrument top.
• Close the lid and press READ . The display
will show blinking dashes and the icons for
cuvette, detectors and LED will appear during
measurement. Alternatively, press LOG/CFM to
skip the first point.
• The second calibration point (15.0 FNU) is then
displayed on the primary LCD, “CAL P.2” on the
secondary LCD, and “READ” tag will blink.
• If the prepared formazin is used, edit the
displayed value by pressing UP or DOWN keys
until the display shows the correct value.
• Remove the first standard cuvette and place the
15.0 FNU standard cuvette (or the prepared
one) into the holder and ensure that the cuvette
mark is aligned with the sign on the instrument
top.
• Close the lid and press READ . The display
will show blinking dashes and the icons for
cuvette, detectors and LED will appear during
measurement.
23
or
• At the end of the measurement, the third calibra‑
tion point (100 FNU) is displayed on the primary
LCD, “CAL P.3” on the secondary LCD, and “READ”
tag will blink.
• At this moment it is possible to exit calibration
by pressing CAL. The instrument will memorize
the two-point calibration data and will return to
measurement mode.
THREE-POINT CALIBRATION
To perform a three-point calibration, continue the
procedure with the following steps:
• Remove the second standard cuvette.
• Place the 100 FNU standard cuvette (or the
prepared formazin standard) into the holder,
with the cuvette mark aligned with the sign on
the instrument.
• Close the lid and press READ . The display will
show blinking dashes and the icons for cuvette, de‑
tectors and LED will appear during measurement.
• At the end of the measurement, the fourth calibra‑
tion point (750 FNU) is displayed on the primary
LCD and “CAL P.4” on the secondary LCD.
• At this moment it is possible to exit calibration by
pressing CAL. The instrument will memorize the
three-point calibration data and will return to
measurement mode.
FOUR-POINT CALIBRATION
To perform a four-point calibration, continue the
procedure with the following steps:
• Remove the third standard cuvette.
• Place the 750 FNU standard cuvette (or the
prepared formazin standard) into the holder,
with the cuvette mark aligned with the sign on
the instrument.
24
• Close the lid and press READ . The display will
show blinking dashes and the icons for cuvette,
detectors and LED will appear during measure‑
ment.
• At the end of the measurement, the four-point
calibration is completed and the instrument
returns automatically to measurement mode.
OUT CAL RANGE FUNCTION
The instrument has an Out Cal Range function to
prevent taking measurements in a range where the
calibration does not assure the best results. The range
where the calibration assures correct measurements
is up to 40 FNU for two-point calibration and up
to 150% of the third point value for three-point
calibration.
The display will show a blinking “CAL” tag each time
the measurements are taken outside the calibration
range.
CALIBRATION ERRORS
• If the read value during calibration is too far from
the set value, the instrument will show “-LO-” or
“-HI-” error.
• If the calculated calibration coefficients are
outside a certain range, the “CAL Err” message
is displayed.
CALIBRATION DELETION
HI98713 is factory calibrated. It is possible to delete
last performed calibration.
To delete last calibration, follow the next steps:
• Enter the GLP feature by pressing GLP .
The date of the last calibration will be displayed
on the LCD.
• Press READ to see the information related to
calibration. The last panel is the one with delete
calibration.
• Press SETUP/DEL to delete the current calibration.
After deletion the instrument will automatically
return to measurement mode.
25
or
LOGGING
HI98713 has a log space for up to 200 records. With each measurement, the date, time and tag ID
is stored. In this way, each record is fully characterized and can be easily analyzed when downloading
data on the PC application (HI92000).
LOGGING
The log function is active after a valid measurement
is obtained (no errors).
• To log a value, press LOG/CFM when the mea‑
surement result is displayed.
The instrument asks to READ TAG for identification
of the sampling location. The location for the new
record is also displayed on the secondary LCD.
• To read the ID code for the sampling location
identification, simply touch the iButton® tag with
the matching connector, located on the back of
the instrument (see Connectors Description, page
9). Alternatively, press again LOG/CFM to store
the record without the tag ID code.
• If the tag is successfully read, the instrument will
beep once, displaying the unique hexadecimal
code of the tag, and store the data.
After data is stored, the instrument returns to
measurement mode.
Notes: • If the tag is not read within 20 seconds,
the logging procedure is canceled.
• A measurement can be stored only once.
Also an over range value can be stored.
• If less than ten free records are available, the
“LOG” tag will blink while storing data.
• If the log memory is full, the “LoG FULL” message
will appear for a few seconds on the LCD and
the instrument will return to measurement mode
without storing the new record.
To store a new record, delete one or more records.
26
or
or
VIEW LOGGED DATA
The stored records can be viewed at any moment
by pressing RCL. To return to normal measurement
mode, press RCL again .
LOG SEARCHING
The log records are stored in chronological order.
The first displayed record is the last stored one.
• Press UP or DOWN keys to scroll the log memory
record by record. By keeping pressed the UP or
DOWN keys, the scrolling speed will increase.
The scrolling of the log is possible from any
panel of the record, except “Delete last log”
and “Delete all logs” panels.
• When scrolling the log, the number of the record
is displayed for one second on the secondary
LCD, together with “TAG” if the identification
of the sampling location was made.
When the end of the log is reached, an error beep
is played.
RECORD VIEWING
Each record contains more information than the
measured value. The additional information is
grouped in several panels.
Press READ to scroll through the record panels.
The record panels are displayed one by one in a
circular way.
Each record contains the following panels:
• The record value (turbidity value) and record
number.
Note: If the logged sample value is an over range
reading, the maximum value (1000) will be
displayed blinking.
• The hexadecimal string of the tag for the
sampling location ID.
Note: If the ID data are missing, dashes are
displayed instead.
27
or
• Measurement date in YYYY.MM.DD format.
• Measurement time in hh:mm format.
• Delete the last record panel (only for last record).
• Delete all records.
DELETE LAST RECORD
To log other values, the last record or all records
have to be deleted.
• To delete the last record, press SETUP/DEL while
in delete last records panel.
• The instrument asks for confirmation and if LOG/
CFM is pressed, the last record is deleted. To
abort the delete function, press READ instead
of LOG/CFM.
• After the record is deleted, the instrument goes
immediately to the first panel of the previous
record. If the log becomes empty, dashes will
be displayed for one second and the instrument
will return to idle mode.
DELETE ALL RECORDS
To delete all records, scroll the log until delete all
records panel is displayed on the LCD.
• To delete all records press SETUP/DEL while in
delete all records panel.
28
• The instrument asks for confirmation and if
LOG/CFM is pressed, all records are deleted. To
abort the delete function, press READ instead
of LOG/CFM.
• After all records are deleted, dashes are
displayed for one second and the instrument
returns to idle mode.
GOOD LABORATORY PRACTICE (GLP)
The GLP feature allows the user to view last calibration data. Also, the user calibration can be deleted.
Press GLP to enter or exit GLP data consulting.
Several functions are available when in GLP menu.
Press READ to scroll the following GLP data:
• The last calibration date, in YYYY.MM.DD
format. If no calibration was performed, the
factory calibration message, “F.CAL”, will be
displayed on the LCD.
or
• The time of the last calibration in hh:mm
format.
• First calibration point: 0.00 FNU if skipped or
the actual read value (e.g. 0.01 FNU).
• Second calibration point.
29
or
• Third calibration point (if available).
• Fourth calibration point (if available).
• Delete calibration panel.
To delete calibration:
• Press SETUP/DEL while in the delete calibration
panel of the GLP.
The user calibration will be deleted and the fac‑
tory calibration will be restored. The instrument
will enter automatically in idle mode.
30
SETUP
Setup mode allows viewing and modifying the instrument parameters.
The blinking “CAL” tag during setup mode suggest to press CAL for parameters editing.
• To enter/exit SETUP, press SETUP/DEL.
• To select the parameter to be edit, press UP or
DOWN keys until the desired panel is displayed.
or
SET BEEPER
The HI98713 has a built-in beeper that signals the
tag read, the key press and the error conditions. The
beeper can be selected to be ON or OFF.
• To set the beeper ON/OFF, press CAL when set
beeper panel is displayed.
The beeper status and “CFM” tag will start
blinking.
• Press the UP or DOWN keys to set the beeper
ON/OFF.
or
• Press LOG/CFM to save the change. The new
selected option will be displayed on the LCD.
Alternatively, press CAL to exit without saving
the changes.
SHOW / HIDE THE TIME
You can choose between showing or hiding the
current hour and minutes on the LCD.
• To set hiding or showing the time, press CAL
when show/hide time panel is displayed.
The time show status and “CFM” tag will start
blinking.
• Press the UP or DOWN keys to set lcd / hide for
time.
31
or
• Press LOG/CFM to save the change. The new
selected option will be displayed on the LCD.
Alternatively, press CAL to exit without saving
the changes.
SET THE DATE
The HI98713 turbidimeter has a built-in real time
clock (RTC). The RTC time is used to generate a
unique time stamp for each recorded value and to
automatically store the last calibration date. The
current time can be displayed on the LCD when the
instrument is in idle mode.
• To set the current date, press CAL when set date
panel is displayed. The date format is YYYY.
MM.DD. The last two digits of the year value
and “CFM” tag will start blinking.
• Press the UP or DOWN keys to set the year value.
or
• Press LOG/CFM or READ to start editing
the month value. The month value will start
blinking.
• Press the UP or DOWN keys to set the month
value.
or
• Press LOG/CFM or READ to start editing the
day value. The day value will start blinking.
• Press the UP or DOWN keys to set the day value.
Note: To edit the year again, after the day was set,
press READ .
• Press LOG/CFM to save the new date. The new
date will be displayed on the LCD. Alternatively,
press CAL to exit without saving the changes.
32
or
SET THE TIME
• To set the current time, press CAL when set time
panel is displayed. The time format is hh:mm.
The hour value and “CFM” tag will start blin‑
king.
• Press the UP or DOWN keys to set the hour value.
or
• Press LOG/CFM or READ to start editing the
minutes. The minutes value will start blinking.
• Press the UP or DOWN keys to set the minutes
value.
Note: To edit the hour again, after the minutes
were edited, press READ .
or
• Press LOG/CFM to save the new time. The new
set time will be displayed.
Alternatively, press CAL to exit without saving
the changes.
SET INSTRUMENT ID
The instrument ID is a four digit number that can be
edited by the user. The instrument ID is downloaded
on the PC application, together with the logged data.
By setting a different ID for each instrument it is
possible to mix information from many turbidimeters
into the same database.
• To set the instrument ID, press CAL when set
instrument ID panel is displayed.
The default instrument ID is 0000. The existing
ID value and “CFM” tag will start blinking.
• Press the UP or DOWN keys to set the new
instrument ID. By pressing and holding the UP
or DOWN keys, the changing speed wil increase.
33
or
• Press LOG/CFM to save the change. The new
instrument ID will be displayed.
Alternatively, press CAL to exit without saving
the changes.
SET BAUD RATE
The HI98713 has a RS232 and a USB link. When
the USB connection is used, the RS232 connection
becomes inactive.
To successfully communicate with the PC, the same
baud rate must be selected on the instrument and
on the PC application. The available baud rates are
1200, 2400, 4800 and 9600.
• To set the baud rate, press CAL when set baud
rate panel is displayed.
The parameter value and “CFM” tag will start
blinking.
• Press the UP or DOWN keys to select the new
baud rate value.
• Press LOG/CFM to save the change. The new se‑
lected baud rate will be displayed. Alternatively,
press CAL to exit without saving the changes.
34
or
LCD BACKLIGHT
The LCD can be illuminated to allow the user to see the readings even in dark
environments.
To turn ON or OFF the backlight, press LIGHT.
The backlight will automatically shut-off after 25 seconds of non-use to
save the battery life.
TAG INSTALLATION
The tag is housed in a rugged metal that can withstand harsh environments. However, it is better
to protect the tag from direct rain.
Place the tag near a sampling point. Fix it securely with the provided screws, in such a way that
the metallic iButton® is easily accessible for reading the tag.
The number of tags that can be installed is practically unlimited. Additional tags can be ordered
(HI920005 - five tag holders with tags).
35
LED REPLACEMENT
In case of LED failure, the defective LED can be easily replaced. When the LED is broken, the instrument
displays “no L” error message.
To replace the LED follow the next steps:
• Remove the battery lid.
• Unscrew the LED connection using a screwdriver.
• Unlock the LED and extract it by pulling it out
from the LED holder handler.
• Place the new LED in the right position and push
it until is securely locked.
• Insert the LED leads into the connector and
tighten them using a screwdriver.
Warning: After LED replacement the meter needs
to be recalibrated.
BATTERIES MANAGEMENT
For field measurements, HI98713 is powered by 4 AA batteries.
The battery life is enough for 3500 normal measurements.
When the instrument is started, the remaining battery life is
estimated and reported in percents.
To preserve the battery it is better to use normal instead of
averaged measurements.
Continuous measurements keep the LED on and should be used
with caution if the battery life is an issue.
To further save the battery life, the instrument will turn off after
15 minutes of non-use. The backlight will be turn off after
25 seconds since the last key was pressed.
The battery life is measured each time the LED is turned on and
if the remaining battery life is less than 10%, the battery tag
will be displayed blinking on the LCD to warn the user that the
batteries need to be replaced.
When the batteries are completely discharged, “0% bAtt” message
will be displayed for one second and the instrument will turn off.
In order to use the instrument again, replace the batteries with
new ones or use an AC adapter.
36
BATTERIES REPLACEMENT
To replace the batteries follow the next steps:
• Press ON/OFF to turn OFF the instrument.
• Open the batteries cover by pressing the locking clip.
• Take out the used batteries and insert 4 new 1.5 AA size batteries, while paying attention to the
correct polarity as indicated on the battery compartment.
• Replace the cover and press it until it locks.
• Turn the instrument ON.
Warning: Replace batteries only in a non-hazardous area.
USING AN AC ADAPTER
The HI98713 can be powered from the AC adapter when used in laboratory. See the Accessories
section to select the correct AC adapter.
To power the instrument, simply connect the AC adapter to the instrument (see Connectors Description,
page 9).
It is not necessary to turn the instrument off when connecting the external adapter.
Note: The connection to the external adapter will not recharge the batteries.
37
PC INTERFACE
To fully use the instrument tag identification system function, the measured data has to be downloaded
to a computer. The instrument can use RS232 or USB connection to communicate with the PC.
When using the RS232 protocol, simply connect a HI920011 serial cable between the instrument
and the computer.
To use the USB protocol, simply connect a regular USB cable between instrument and PC.
In both cases, the PC must run the HI92000 application for successful data transfer. To allow our users
access to the latest version of Hanna Instruments PC compatible software, we made the products available
for download at http://software.hannainst.com. Select the product code and click Download Now.
ERROR CODES
HI98713 has a powerful diagnostic system. The common errors are detected and reported for easy
diagnostic and maintenance.
ERROR
DESCRIPTION
ACTION
Critical errors.
Call Hanna Instruments service
The instrument beeps and shuts down.
Press simultaneously UP and
The instrument beeps shortly twice and
Err4
DOWN to reset the EEPROM
shuts down after 10 seconds.
contents.
Close the lid.
CAP
The lid is not closed.
If the error persists, return the
instrument.
Replace the lamp. Check the
no L
Lamp broken or no light.
optical system for obstructions.
Check the optical system for
L Lo
Not enough light.
obstructions.
The standard used for current calibra‑ Check the standard and use
-LOtion point is too low.
the correct one.
-HIThe standard used for current calibra‑ Check the standard and use
tion point is too high.
the correct one.
Battery tag blinking The remaining battery life is too low. Replace batteries.
The batteries are too discharged for
bAtt
Replace batteries.
correct measurements.
Err1 – Err3;
Err6; Err7; Err8
38
ACCESSORIES
HI710005
HI710006
HI710012
HI710013
HI710014
HI731318
HI731331
HI731335N
HI740027P
HI7402341
HI92000
HI920005
HI920011
HI93703-50
HI93703-58
HI98713-11
Voltage adapter from 115V to 12 Vdc (USA plug)
Voltage adapter from 230V to 12 Vdc (European plug)
Voltage adapter from 240V to 12 Vdc (UK plug)
Voltage adapter from 230V to 12 Vdc (South Africa plug)
Voltage adapter from 230V to 12 Vdc (Australia plug)
Tissue for wiping cuvettes (4 pcs)
Glass cuvettes (4 pcs)
Caps for cuvettes (4 pcs.)
1.5V AA battery (12 pcs)
Replacement LED for HI88713, HI98713 (1 pcs.)
Windows® compatible software
5 tag holders with tags
5 to 9 pins RS232 connection cable
Cuvettes cleaning solution (230 mL)
Silicon oil (15 mL)
Calibration Kit
CERTIFICATION
All Hanna Instruments conform to the CE European Directives.
Disposal of Electrical & Electronic Equipment. The product should not be treated
as household waste. Instead hand it over to the appropriate collection point for the
recycling of electrical and electronic equipment which will conserve natural resources.
Disposal of waste batteries. This product contains batteries, do not dispose of them with
other household waste. Hand them over to the appropriate collection point for recycling.
Ensuring proper product and battery disposal prevents potential negative consequences for the
environment and human health. For more information, contact your city, your local household waste
disposal service, the place of purchase or go to www.hannainst.com.
RECOMMENDATIONS FOR USERS
Before using this meter, make sure it is entirely suitable for your specific application and for the
environment in which it is used. Any variation introduced by the user to the supplied equipment may
degrade the meter’s performance. For yours and the meter’s safety do not use or store the meter in
hazardous environments.
Hanna Instruments reserves the right to modify the design, construction and appearance of its products
without advance notice.
39
World Headquarters
Hanna Instruments Inc.
Highland Industrial Park
584 Park East Drive
Woonsocket, RI 02895 USA
www.hannainst.com
MAN98713 06/19
Printed in Romania
40
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