Hanna Instruments HI 93732N User Manual
Instruction Manual
HI 93732N
Dissolved Oxygen ISM
This Instrument is in
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WARRANTYWARRANTY
WARRANTY
WARRANTYWARRANTY
HI 93732N 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.
Damages due to accident, misuse, tampering or lack of prescribed
maintenance are not covered.
If service is required, contact the dealer from whom you purchased the
instrument. 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 Customer Service
department and then send it with shipment costs prepaid. When shipping
any instrument, make sure it is properly packaged for complete
protection.
To validate your warranty, fill out and return the enclosed warranty card
within 14 days from the date of purchase.
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.
Hanna Instruments reserves the right to modify the design, construction
and appearance of its products without advance notice.
Compliance with the CE Directives
Dear Customer,
Thank you for choosing a Hanna product. This manual will
provide you with the necessary information for the correct
operation of the meter. Please read it carefully before using
the meter. If you need additional technical information, do
not hesitate to e-mail us at tech@hannainst.com.
This instrument is in compliance with directives.
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
Remove the instrument from the packing material and
examine it carefully to make sure that no damage has
occurred during shipment. If there is any damage, notify
your Dealer.
Each Ion Specific Meter is supplied complete with
• Two Sample Cuvets and Caps
• One Transport Cap
• One 60 mL glass Bottle with Stopper
• 9V Battery
Note: Conserve all packing material until the instrument
has been observed to function correctly. Any defective
item must be returned in its original packing with
the supplied accessories.
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
The HI 93732N meter measures the content of dissolved
oxygen (O2) in surface, feed, natural and waste waters in
the 0.0 to 10.0 mg/L (ppm) range.
The meter uses an exclusive positive-locking system to ensure
that the cuvet is in the same place every time it is placed
into the measurement cell.
The reagents are in liquid form and are supplied in bottles.
The amount of reagent is precisely dosed to ensure maximum
repeatability.
Display codes aid the user in routine operations. The meter
has an auto-shut off feature that will turn itself off after 10
minutes of non-use.
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
Range 0.0 to 10.0 mg/L (ppm)
Resolution 0.1 mg/L
Accuracy ±0.2 mg/L ± 3% of reading
Typical EMC ±0.1 mg/L
Deviation
Light Source Light Emitting Diode @ 470 nm
Method Adaptation of the Standard Methods for
the Examination of Water and Wastewater
(18th edition), azide modified Winkler
method. The reaction between dissolved
oxygen and the reagent causes a yellow
tint in the sample.
Light Life Life of the instrument
Light Detector Silicon Photocell
Environment 0 to 50°C (32 to 122°F);
max 95% RH non-condensing
Battery 1 x 9 volt/40 hours
Type/Life
Auto-Shut off After 10' of non-use
Dimensions 180 x 83 x 46 mm (7.1 x 3.3 x 1.8")
Weight 290 g (10 oz.).
REQUIRED REAGENTS
Code Description Quantity
HI 93732A-0 Reagent A 5 drops
HI 93732B-0 Reagent B 5 drops
HI 93732C-0 Reagent C 10 drops
REAGENT SETS
HI 93732-01 Reagents for 100 tests
HI 93732-03 Reagents for 300 tests
DISPLAY CODE GUIDEDISPLAY CODE GUIDE
DISPLAY CODE GUIDE
DISPLAY CODE GUIDEDISPLAY CODE GUIDE
This indicates that the meter is in a
ready state and zeroing can be performed.
Sampling in Progress. This prompt
appears each time the meter is performing
a measurement.
This indicates that the meter is in a
zeroed state and measurement can be
performed.
A zero reading was not taken. Insert a
sample before adding reagent and press
ZERO.
Under range. A blinking "0.00" indicates
that the sample absorbs less light than
the zero reference. Check the procedure
and make sure you use the same cuvet
for reference (zero) and measurement.
Over range. A flashing value higher than
the maximum concentration readable (see
specifications) indicates that the sample
absorbs too much light, meaning that
the concentration is too high.
Light over range. The cuvet is not inserted
correctly and an excess ambient light is
reaching the detector. If the cover is
properly installed, then contact your dealer
or the nearest Hanna Customer Service
Center.
Light under range. The zero sample is
too dark for proper zeroing. If this is not
the case, contact your dealer or the
nearest Hanna Customer Service Center.
The "V" indicates that the battery voltage
is getting low and the battery needs to
be replaced.
This indicates that the battery is dead
and must be replaced.
Note: once this indication is displayed,
the meter will lockup. Change the
battery to restart.
OPERATIONAL GUIDEOPERATIONAL GUIDE
E
OPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
MEASUREMENT PROCEDURE
• Turn the meter on by
pressing ON/OFF.
• When the LCD displays
“- - -”, it is ready.
• Fill one 60 mL glass bottle
completely with the
unreacted sample.
• Replace the cap and ensure
that a small part of the
sample spills over.
x 5
• Remove the cap and add 5
drops of HI 93732A and 5
drops of HI 93732B.
• Add some more sample, to fill the bottle completely.
Replace the cap again and ensure that a part of the
sample spills over. This is to make sure that no air
bubbles have been trapped inside, which would corrupt
the reading.
• Invert several times the
bottle. The sample becomes
orange-yellow and a
flocculant agent will appear.
• Let the sample stand and
the flocculant agent will start
to settle.
• After approximately 2
minutes, when the upper
half of the bottle becomes
limpid, add 10 drops of HI
93732C.
ON
OFF
x 5
x 10
• Replace the cap and invert
the bottle until dissolution
of the settled flocculant is
complete. The sample is
ready for measurement when
it is yellow and completely
limpid.
• Fill the cuvet up to the
mark with 10 mL of the
unreacted (original) sample,
10 mL
and replace the cap. This is
the blank.
• Place the cuvet into the older
and ensure that the notch
on the cap is positioned
securely into the groove.
• Press ZERO and “SIP” will appear on the display.
ZERO
• Wait for a few seconds and
the display will show
“-0.0-”. Now the meter is
zeroed and ready for
measurement.
• Remove the cuvet.
• Fill another cuvet up to the
mark with 10 mL of the
reacted sample and replace
the cap.
• Reinsert the cuvet into the
instrument.
• Press READ and “SIP” will appear during measurement.
• The instrument directly displays the concentration of dissolved
oxygen in mg/L on the Liquid Crystal Display.
INTERFERENCES
Interferences may be caused by reducing and oxidizing
materials.
TIPS FOR AN ACCURATETIPS FOR AN ACCURATE
TIPS FOR AN ACCURATE
TIPS FOR AN ACCURATETIPS FOR AN ACCURATE
MEASUREMENTMEASUREMENT
MEASUREMENT
MEASUREMENTMEASUREMENT
The instruction listed below should be carefully followed
during testing to ensure best accuracy.
• It is important that the sample does not contain any
debris. This would corrupt the readings.
• Each time the cuvet is used, the cap must be tightened
to the same degree.
• Whenever the cuvet is placed into the measurement cell,
it must be dry outside and completely free of fingerprints,
oil or dirt. Wipe it thoroughly with HI 731318 or a lintfree cloth prior to insertion.
• Shaking the cuvet can generate bubbles in the sample,
causing higher readings. To obtain accurate
measurements, remove such bubbles by swirling or by
gently tapping the cuvet.
• Do not let the reacted sample stand too long after
reagent is added or accuracy will be lost.
• It is possible to take multiple readings in a row, but it
is recommended to take a new zero reading for each
sample and to use the same cuvet is used for zeroing
and measurement.
• After the reading it is important to discard immediately
the sample, otherwise the glass might become permanently
stained.
• All the reaction times reported in this manual are
referred to 20°C (68°F). As a general rule of thumb,
they should be doubled at 10°C (50°F) and halved at
30°C (86°F).
BATTERY REPLACEMENTBATTERY REPLACEMENT
BATTERY REPLACEMENT
BATTERY REPLACEMENTBATTERY REPLACEMENT
Battery replacement must only take place in a non-hazardous
area using a 9V alkaline battery.
Simply slide off the battery cover on the back of the meter.
Detach the battery from the terminals and attach a fresh
9V battery while paying attention to the correct polarity.
Replace the battery and the cover.
9V
SLID
OFF
ACCESSORIESACCESSORIES
ACCESSORIES
ACCESSORIESACCESSORIES
REAGENT SETS
HI 93732-01 Reagents for 100 tests
HI 93732-03 Reagents for 300 tests
OTHER ACCESSORIES
HI 710009 Blue rubber boot
HI 710010 Orange rubber boot
HI 721310 9V battery (10 pcs)
HI 731318 Tissue for wiping cuvets (4 pcs)
HI 731321 Glass cuvets (4 pcs)
HI 731325 Caps for cuvets (4 pcs)
HI 93703-50 Cuvets cleaning solution (230 mL)
HI 740038 60 mL glass bottle with stopper
CE DECLARATIONCE DECLARATION
CE DECLARATION
CE DECLARATIONCE DECLARATION
OF CONFORMITYOF CONFORMITY
OF CONFORMITY
OF CONFORMITYOF CONFORMITY
Recommendations for Users
Before using these products, make sure that they are entirely suitable for the environment
in which they are used.
Operation of these instruments in residential area could cause unacceptable interferences
to radio and TV equipments, requiring the operator to take all necessary steps to correct
interferences.
Any variation introduced by the user to the supplied equipment may degrade the
instruments' EMC performance.
To avoid damages or burns, do not perform any measurement in microwave ovens.
IST93732R2 09/03
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