Instruction Manual
HI 93828
Nitrate ISM
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Warranty
HI 93828 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 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
• 9V Battery
• Two Sample Cuvets and Caps
• One Transport Cap
Note: Conserve all packing material until the instrument
has been observed to function correctly. Any defective
item must be returned in its original packing.
General Description
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The HI 93828 meter measures the nitrate (NO
water and wastewater in the 0 to 100 mg/L (ppm) range.
The meter uses an exclusive positive-locking system to ensure
that the cuvet is in the same position every time it is placed
into the measurement cell.
The reagent is in powder form and is supplied in packets. The
amount of reagent is precisely dosed to ensure maximum
repeatability.
Display codes aid the user in routine operations.
The meters have an auto-shut off feature that will turn the
instrument off after 10 minutes of non-use.
IST93828R2 01/07
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) content in
3
Specifications Display 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.
CUVET HOLDER
CUVET ALIGNMENT
INDICATOR
ON/OFF
ZERO
READ TIMED
READ DIRECT
SPECIFICATIONS
Range 0 to 100 mg/L
Resolution 1 mg/L
Accuracy ±5 mg/L ±5% of reading
Typical EMC ±1 mg/L
Deviation
Light Source Light Emitting Diode @ 555 nm
Method Adaptation of the cadmium reduction
method. The reaction between nitrate
and the reagent causes an amber tint
in the sample
Light Detector Silicon Photocell
Environment 0 to 50°C (32 to 122°F);
max 95% RH non-condensing
Battery Type/Life 1 x 9 volt/40 hours
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 93728-0 Nitrate Reagent 1 packet
REAGENT SETS
HI 93728-01 Reagents for 100 tests
HI 93728-03 Reagents for 300 tests
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"
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. Dilute the sample.
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 Guide
MEASUREMENT PROCEDURE
• Turn the meter on by pressing
ON/OFF.
• When the LCD displays
"- - -", it is ready.
• Add to the cuvet 6 mL of
sample, up to about half of
its height, and replace the cap.
• Place the cuvet into the holder
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 and add
the content of one packet of
HI 93728-0 Nitrate Reagent.
• Replace the cap and immediately shake vigorously for exactly
10 seconds by moving the cuvet up and down.
ON
OFF
Continue to mix by inverting the cuvet gently and slowly for
50 seconds, while taking care not to induce air bubbles. A
deposit remains but it does not affect the measurement. Time
and way of shaking could sensitively affect the measurement.
• Reinsert the cuvet into the
instrument, taking care not
to shake it.
• Press READ TIMED and the display will show the countdown
prior to the measurement or, alternatively, wait for 4
minutes and 30 seconds and press READ DIRECT. In both
cases "SIP" will appear during measurement.
4’30"
READ
TIMED
READ
DIRECT
12
9
3
6
• The instrument directly displays concentration in mg/L of
nitrate on the Liquid Crystal Display.
• To convert the reading to mg/L of nitrate-nitrogen
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–
––
(NO
-N), multiply by a factor of 0.226.
3
INTERFERENCES
Interference may be caused by:
Ammonia and amines, as urea and primary aliphatic amines
Chloride above 100 ppm (negative interference)
Chlorine above 2 ppm (positive interference)
Copper (it must be absent)
Iron (III) (positive interference)
Strong oxidizing and reducing substances
Sulfide (it must be absent)
Note: To ensure accurate results, perform the tests at room
temperature, between 18°C and 28°C (65F to 83F).
For best results: Intensely colored samples or suspended
matter in large amounts will cause interference.
Therefore sample should be adequately treated before
performing the test.
Tips for an Accurate Measurement
The instruction listed below should be carefully followed
during testing to ensure best accuracy.
• Do not touch the cuvet walls with hands.
• In order to maintain the same conditions during the
zeroing and the measuring phases, it is necessary to
close the cuvet to prevent any contamination.
• Do not let the test sample stand too long after reagent
is added or accuracy will be lost.
• Whenever the cuvet is placed into the measurement cell,
it must be completely free of fingerprints, oil or dirt.
Wipe it thoroughly with HI 731318 or a lint-free cloth
prior to insertion.
• It is important that the sample does not contain any
debris. This would corrupt the readings.
• It is possible to take multiple readings in a row, but it
is recommended that a zero reading be taken for each
sample and that the same cuvet is used for zeroing and
measurement.
• It is important to discard the sample immediately after
the reading is taken because the glass may become
permanently stained.
• 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 vial.
• All the reaction times reported in this manual are
referred to 20°C (68°F). As a general rule, they should
be doubled at 10°C (50°F) and halved at 30°C (86°F).
Battery 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
Accessories
REAGENT SETS
HI 93728-01 Reagents for 100 tests
HI 93728-03 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)
CE Declaration of 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.
Safety Data Sheets
Read the relevant SDS sheets before performing the test.
Safety Data Sheets are available at: www.hannainst.com