Hanna Instruments | HI97728-web | Owner Manual | Hanna Instruments HI97728-web Owner Manual

Hanna Instruments HI97728-web Owner Manual
Nitrate
Photometer
INSTRUCTION MANUAL
HI97728
Dear
Customer,
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using the
instrument.
This manual will provide you with the necessary information
for correct use of the 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.
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.
PRELIMINARY EXAMINATION...........................................................................44
SAFETY MEASURES.........................................................................................44
SPECIFICATIONS.............................................................................................55
ABBREVIATIONS ............................................................................................55
DESCRIPTION.................................................................................................66
5.1. GENERAL DESCRIPTION AND INTENDED USE............................................66
5.2. FUNCTIONAL DESCRIPTION.....................................................................77
5.3. PRECISION AND ACCURACY.....................................................................88
5.4. PRINCIPLE OF OPERATION......................................................................88
5.5. OPTICAL SYSTEM....................................................................................99
6. GENERAL OPERATIONS....................................................................................99
6.1. METER VALIDATION: CAL CHECK/CALIBRATION..........................................99
6.2. CHEMICAL FORMULA/UNIT CONVERSION............................................... 11
11
6.3. GLP..................................................................................................... 11
11
6.4. LOGGING DATA/LOG RECALL.................................................................. 12
12
6.5. GENERAL SETUP................................................................................... 12
12
6.6. REAGENTS/ACCESSORIES...................................................................... 15
15
6.7. CONTEXTUAL HELP............................................................................... 15
15
6.8. BATTERY MANAGEMENT........................................................................ 16
16
7. PHOTOMETER...............................................................................................16
16
7.1. PROPER USE OF POWDER PACKET......................................................... 16
16
7.2. CUVETTE PREPARATION........................................................................ 17
17
8. METHOD PROCEDURE................................................................................... 19
19
22
9. ERROR DESCRIPTIONS.................................................................................. 22
10. BATTERY REPLACEMENT.............................................................................. 23
23
24
11. ACCESSORIES............................................................................................. 24
11.1. REAGENT SETS................................................................................... 24
24
24
11.2. OTHER ACCESSORIES.......................................................................... 24
CERTIFICATION.................................................................................................. 25
25
26
RECOMMENDATIONS FOR USERS........................................................................ 26
WARRANTY....................................................................................................... 27
27
TABLE OF CONTENTS
1.
2.
3.
4.
5.
3
PRELIMINARY EXAMINATION
1. PRELIMINARY EXAMINATION
Remove the instrument and accessories from the packaging and examine it carefully to
make sure that no damage has occurred during shipping. Notify your nearest Hanna
Customer Service Center if damage is observed.
Each HI97728C is delivered in a rugged carrying case and is supplied with:
• Sample cuvette (2 pcs.)
• Sample cuvette cap (2 pcs.)
• Plastic stopper (2 pcs.)
• A ZERO - CAL Check Cuvette A
• HI97728B - CAL Check Cuvette B for Nitrate
• Cloth for wiping cuvettes
• Scissors
• 1.5V AA Alkaline batteries
• Instruction manual
• Meter quality certificate
• CAL Check standard certificate
Each HI97728 is delivered in a cardboard box and is supplied with:
• Sample cuvette (2 pcs.)
• Sample cuvette cap (2 pcs.)
• Plastic stopper (2 pcs.)
• 1.5V AA Alkaline batteries
• Instruction manual
• Meter quality certificate
Note: Save all packing material until you are sure that the instrument works correctly.
Any damaged or defective item must be returned in its original packing material with
the supplied accessories.
SAFETY MEASURES
2. SAFETY MEASURES
• The chemicals contained in the reagent kits may be hazardous if
improperly handled.
• Read the Safety Data Sheets (SDS) before performing tests.
• Safety equipment: Wear suitable eye protection and clothing when required, and
follow instructions carefully.
• Reagent spills: If a reagent spill occurs, wipe up immediately and rinse with plenty
of water. If reagent contacts skin, rinse the affected area thoroughly with water.
Avoid breathing released vapors.
• Waste disposal: For proper disposal of reagent kits and reacted samples, contact a
licensed waste disposal provider.
4
Range
Resolution
Nitrate
Accuracy
Method
Light source
Bandpass filter
Bandpass filter
Measurement bandwidth
System
Bandpass filter
wavelength accuracy
Light detector
Cuvette type
Auto logging
Display
0.0 to 30.0 mg/L (as NO3-N)
0.1 mg/L
±0.5 mg/L ±10% of reading at 25 °C
Adaptation of Cadmium Reduction method
Light Emitting Diode
525 nm
SPECIFICATIONS
3. SPECIFICATIONS
8 nm
±1.0 nm
Silicon photocell
Round 24.6 mm diameter (22 mm inside)
50 readings
128 x 64 pixel B/W LCD with backlight
After 15 minutes of inactivity
Auto-off
(30 minutes before a READ measurement)
Battery type
1.5 V AA Alkaline (3 pcs.)
Battery life
> 800 measurements (without backlight)
Additional
Specifications
0 to 50 °C (32 to 122 °F);
Environment
0 to 100% RH, non-serviceable
Dimensions
142.5 x 102.5 x 50.5 mm (5.6 x 4.0 x 2.0")
Weight (with batteries) 380 g (13.4 oz.)
Case ingress
IP67, floating case
protection rating
ABBREVIATIONS
4. ABBREVIATIONS
mg/L
milligrams per liter (ppm)
mL
milliliter
°C
degree Celsius
°F
degree Fahrenheit
LED
Light Emitting Diode
EPA
US Environmental Protection Agency
HDPE
High Density Polyethylene
GLP
Good Laboratory Practice
NIST
National Institute of Standards and Technology
5
DESCRIPTION
5. DESCRIPTION
5.1. GENERAL DESCRIPTION AND INTENDED USE
The HI97728 is an auto-diagnostic portable meter that benefits from Hanna’s years
of experience as a manufacturer of analytical instruments. It has an advanced optical
system that uses a Light Emitting Diode (LED) and a narrow band interference filter that
allows for accurate and repeatable readings.
The optical system is sealed from outside dust, dirt and water. The meter uses an
exclusive positive-locking system to ensure that the cuvettes are placed into the holder
in the same position every time.
With the CAL Check functionality, users are able to validate the performance of the
instrument at any time and apply a user calibration (if necessary). Hanna’s CAL Check
cuvettes are made with NIST traceable standards.
The built-in tutorial mode guides the users step-by-step through the measurement
process. It includes all steps required for sample preparation, the required reagents
and quantities.
The HI97728 meter measures the nitrate content in water samples in the 0.0 to 30.0
mg/L (ppm) as NO3-N range. The method is an adaptation of the Cadmium Reduction
method.
The HI97728 photometer is a compact and versatile meter suitable for field or bench
measurements, featuring a:
• Sophisticated optical system
• Meter validation using certified CAL Check cuvettes
• Tutorial mode guides the user step-by-step
• Auto logging
• Waterproof IP67, floating case
• GLP features
6
1) ON/OFF power button
2) Keypad
3) Liquid Crystal Display (LCD)
4) Cuvette holder
DESCRIPTION
5.2. FUNCTIONAL DESCRIPTION
5) Indexing mark
6) Battery cover
Keypad Description
The keypad contains 3 direct keys and 3 functional keys with the following functions:
Press the functional keys to perform the function displayed above them on the LCD.
Press and hold to power off/on. Press briefly to return to the previous screen.
Press to access the menu screen.
Press to display the context-sensitive help menu.
7
DESCRIPTION
5.3. PRECISION AND ACCURACY
Precision is how closely repeated
measurements are to one
another. Precision is usually
expressed as standard deviation
(SD).
Accuracy is defined as the
closeness of a test result to the
true value.
Although good precision suggests
good accuracy, precise results can
be inaccurate. The figure explains
these definitions.
For each method, the accuracy is expressed in the related measurement section.
5.4. PRINCIPLE OF OPERATION
Absorption of light is a typical phenomenon of interaction between electromagnetic
radiation and matter. When a light beam crosses a substance, some of the radiation
may be absorbed by atoms, molecules or crystal lattices.
If pure absorption occurs, the fraction of light absorbed depends both on the optical
path length through the matter and on the physical-chemical characteristics of the
substance according to the Lambert-Beer Law:
-log I/Io = el c d
or
A = el c d
Io
I
el
c
d
=
=
=
=
=
intensity of incident light beam
intensity of light beam after absorption
molar extinction coefficient at wavelength λ
molar concentration of the substance
optical path through the substance
Therefore, the concentration “c” can be calculated from the absorbance of the substance
as the other factors are constant.
Photometric chemical analysis is based on specific chemical reactions between a
sample and reagent to produce a light-absorbing compound.
8
DESCRIPTION
5.5. OPTICAL SYSTEM
Instrument Block Diagram
The internal reference system (reference detector) of the HI97728 photometer compensates
for any drifts due to power fluctuations or ambient temperature changes, providing a
stable source of light for your blank (zero) measurement and sample measurement.
LED light sources offer superior performance compared to tungsten lamps. LEDs have a
much higher luminous efficiency, providing more light while using less power. They also
produce little heat, which could otherwise affect electronic stability. LEDs are available in
a wide array of wavelengths, whereas tungsten lamps have poor blue/violet light output.
Improved optical filters ensure greater wavelength accuracy and allow a brighter,
stronger signal to be received. The end result is higher measurement stability and less
wavelength error.
A focusing lens collects all of the light that exits the cuvette, eliminating errors from
cuvette imperfections and scratches, eliminating the need to index the cuvette.
GENERAL OPERATIONS
6. GENERAL OPERATIONS
6.1. METER VALIDATION: CAL CHECK/CALIBRATION
Validation of the HI97728 involves verifying the concentration of the certified CAL
Check standards. The CAL Check screen guides the user step-by-step through the
validation process and user calibration (if necessary).
WARNING: Do not use any solutions/standards other than the Hanna® CAL Check
Standards. For accurate validation and calibration results, please perform these at
room temperature (18 to 25 °C; 64.5 to 77.0 °F).
Note: CAL Check Standards will not read the specified value in measurement mode.
Protect the CAL Check cuvettes from direct sunlight by keeping them in the original
packing. Store between +5 °C and +30 °C (41 - 86 °F), do not freeze.
9
GENERAL OPERATIONS
To perform a CAL Check:
1. Press CAL Check key from measurement mode.
The “Not Available“ message or the date/time
and status of the last CAL Check will be displayed
on the screen.
2. Press the Check key to start a new CAL Check. Press
key at any time to abort the validation
the
process.
3. Use the   keys to enter the certificate value
of the calibration standard found on the CAL Check
Standard Certificate. Press Next to continue.
Note: This value will be saved in the instrument for future validation. If a new set
of calibration standards is obtained please update the certificate value.
4. Insert the A ZERO CAL Check Cuvette A then press
Next to continue. The “Please Wait...“ message
will be displayed during the measurement.
5. Insert the HI97728B CAL Check Cuvette B then
press Next to continue. The “Please Wait...“
message will be displayed during the measurement.
6. When the CAL Check is complete the display will
show one of the following messages and the value
obtained during the measurement:
- “PASSED“: The measured value is within the accuracy
specification, no user calibration is required.
10
- “OUT OF SPECIFICATION“: A user calibration is not allowed, the measured value is
outside of the tolerance window. Check the certified value, expiration date and clean
the outside of the cuvette. Repeat the CAL Check procedure. If this error continues
contact your nearest Hanna Customer Service Center.
GENERAL OPERATIONS
- “OUT OF SPECIFICATION“ and the Calibration key is available: The measured
value is near the expected value. To update the user calibration press Calibrate.
Press Accept to confirm or Cancel to return to the previous screen.
6.2. CHEMICAL FORMULA/UNIT CONVERSION
Chemical formula/unit conversion factors are pre-programmed into the instrument
and are method specific. In order to view the displayed result in the desired chemical
and use the   keys to select Chemical
formula enter menu by pressing
Form. Press Select to change the displayed chemical form. Use the   keys to
highlight the desired chemical formula and press Select. The selected formula will be
saved when the instrument is powered off.
6.3. GLP
key to enter the menu. Use the  
Press the
keys to select GLP and press Select. Good Laboratory
Practice (GLP) shows the date and time of the last user
calibration (if available) or factory calibration. To erase
the last user calibration and to clear the CAL Check press Clear and follow the prompts.
Press Yes to erase and return to the factory calibration data or No to exit the clear
procedure.
11
GENERAL OPERATIONS
6.4. LOGGING DATA/LOG RECALL
The instrument features a data autolog function to help users keep track of all
measurements. Every time a measurement is made the data is automatically saved.
The data log can hold 50 individual measurements. When the data log is full (50 data
points) the meter will rewrite the oldest data point.
Viewing and deleting the data is possible using the Log Recall menu.
key to enter the menu. Use the functional   keys to select Log
Press the
Recall and press Select.
Use the functional   keys to highlight a log and press Info to view additional
information about the log. From this screen the Next and Previous keys can be used
to view other logs.
Use the Delete key to erase logged data. After pressing Delete a prompt on display
is asking for confirmation.
Press No or the
key to return to the previous screen.
Press Yes to delete selected log.
Press Del All to erase all logged data.
If Del All is pressed follow the prompt to confirm.
Press Yes to delete all logged data, No or the
key to return to the log recall.
6.5. GENERAL SETUP
key to enter the menu. Use the   keys to select Setup and press
Press the
Select. Use the   keys to highlight desired option.
12
Contrast
Values: 0 to 100 %
Press the Modify key to change the display’s contrast.
Use the   keys to increase or decrease the value.
Press the Accept key to confirm the value or the
key to return to the Setup menu without saving the new
value.
GENERAL OPERATIONS
Backlight
Values: 0 to 100 %
Press the Modify key to access the backlight intensity.
Use the   keys to increase or decrease the value.
key to
Press the Accept key to confirm or the
return to the Setup menu without saving the new value.
Date/Time
Press the Modify key to change the date/time.
Press the   keys to highlight the value to be
modified (year, month, day, hour, minute or second).
Press Edit to modify the highlighted value. Use the 
 keys to change the value.
Press the Accept key to confirm or the
return to the previous screen.
key to
Time Format
Option: AM/PM or 24-hour
Press the functional key to select the desired time format.
13
GENERAL OPERATIONS
Date Format
Press the Modify key to change the date format.
Use the   keys to select the desired format.
key to
Press the Accept key to confirm or the
return to the Setup menu without saving the new format.
Decimal Separator
Option: Comma ( , ) or Period ( . )
Press the functional key to select the desired decimal
separator. The decimal separator is used on the
measurement screen.
Language
Press the Modify key to change the language. Use the
  keys to select the desired language.
Press Accept to choose one of the languages installed.
Beeper
Option: Enable or Disable
When enabled, a short beep is heard every time a key is
pressed. A long beep alert sounds when the pressed key
is not active or an error is detected. Press the functional
key to enable/disable the beeper.
Tutorial
Option: Enable or Disable
When enabled, the user will be guided step-by-step
through the measurement procedure.
14
Restore factory settings
Press the Select key to reset to factory settings.
Press Accept to confirm or Cancel to exit without
restoring the factory settings.
GENERAL OPERATIONS
Meter Information
Press the Select key to view the model, serial number,
firmware version and selected language. Press the
key to return to the Setup menu.
6.6. REAGENTS/ACCESSORIES
key to enter the menu. Use the  
Press the
keys to select Reagents/Accessories and press Select
to access a list of reagents and accessories. To exit press
the
key.
6.7. CONTEXTUAL HELP
The HI97728 offers an interactive contextual help mode
that assists the user at any time.
key.
To access the help screen press the
The instrument will display additional information related to the current screen. To read
all the available information, scroll the text using the   keys.
To exit help mode press the
or the
key and the meter will return to the
previous screen.
15
GENERAL OPERATIONS
6.8. BATTERY MANAGEMENT
The meter will perform an auto-diagnostic test when it is powered on. During this test,
the Hanna® logo will appear on the LCD. After 5 seconds, if the test was successful,
the last method selected will appear on the display. The battery icon on the LCD will
indicate the battery status:
- battery full
- battery below 10%, replace the batteries soon
- battery is low, replace the batteries with new ones
PHOTOMETER
To conserve battery, the meter will turn off automatically after 15 minutes of inactivity.
If a zero reading has been done but not a read, auto-off time is increased to 30 minutes.
16
7. PHOTOMETER
7.1. PROPER USE OF POWDER PACKET
(a) Use scissors to open the powder packet
(b) Push the edges of the packet to form a spout
(c) Pour out the content of the packet
(a) Invert the cuvette a couple of times or for a specified time: hold the cuvette in the
vertical position. Turn the cuvette upside-down and wait for all of the solution to
flow to the cap end, then return the cuvette to the upright vertical position and
wait for all of the solution to flow to the cuvette bottom. This is one inversion.
The correct speed for this mixing technique is 10-15 complete inversions in 30
seconds. This mixing technique is indicated with “invert to mix” and the following
icon:
PHOTOMETER
7.2. CUVETTE PREPARATION
Proper mixing is very important for reproducibility of the measurements. The proper
mixing technique for each method is listed in the method procedure.
(b) The mixing method is indicated with “shake vigorously“ using one of the following
icons:
In order to avoid reagent leaking and to obtain more accurate measurements, close
the cuvette first with the supplied HDPE plastic stopper
and then the black cap.
17
PHOTOMETER
Whenever the cuvette is inserted into the measurement holder, it must be dry outside
and free of fingerprints, oil or dirt. Wipe it thoroughly with HI731318 or a lint-free
cloth prior to insertion.
Shaking the cuvette can generate bubbles in the sample, causing higher readings. To
obtain accurate measurements, remove such bubbles by swirling or by gently tapping
the cuvette.
Do not let the reacted sample stand too long after reagent has been added. For best
accuracy, respect the timings described in each specific method.
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 cuvette for zeroing and measurement
when possible.
Discard the sample immediately after the reading has been taken, or the glass might
become permanently stained.
All the reaction times reported in this manual are at 25 °C (77 °F). In general, the
reaction time should be increased for temperatures lower than 20 °C (68 °F), and
decreased for temperatures higher than 25 °C (77 °F).
18
REQUIRED REAGENTS
Code
Description
HI93728-0
Nitrate Reagent
REAGENT SETS
HI93728-01
HI93728-03
Quantity
1 packet
Nitrate Reagent - 100 tests
Nitrate Reagent - 300 tests
For other accessories see page 24.
METHOD PROCEDURE
8. METHOD PROCEDURE
MEASUREMENT PROCEDURE
Note: If tutorial mode is disabled follow the measurement procedure below. If the
tutorial mode is enabled, press Measure and follow the messages on the screen.
• Fill the cuvette with 10 mL of sample (up to the
mark). Replace the plastic stopper and the cap.
10 mL
• Insert the cuvette into the holder and ensure that the
notch on the cap is positioned securely in the groove.
• Press the Zero key. The display will show “-0.0-” when the meter is zeroed and
ready for measurement.
• Remove the cuvette and add the content of one packet
of HI93728-0 Nitrate Reagent. Replace the plastic
stopper and the cap.
19
METHOD PROCEDURE
• Shake vigorously up and down for exactly 10
seconds. Continue to mix by inverting the cuvette
gently for 50 seconds, while taking care not to
induce air bubbles. Powder will not completely
dissolve. Time and method of shaking could
sensitively affect the measurement.
Note: The method is technique sensitive. For proper mixing technique see Cuvette
Preparation procedure detailed on page 17.
• Insert the cuvette into the holder and ensure that the notch
on the cap is positioned securely in the groove.
• Press the Read key and the display will show a 4 minute and 30 second countdown
prior to the measurement. To skip the timer press Read twice. When the timer ends
the meter will perform the reading. The instrument displays the results in mg/L of
nitrate-nitrogen (NO3-N).
• Press
20
and use the   keys to select Chemical Form.
• Press
to return to the measurement screen.
INTERFERENCES
Interference may be caused by:
Ammonia and amines, as urea and primary aliphatic amines
Chloride above 100 ppm
Chlorine above 2 ppm
Copper
Iron(III)
Strong oxidizing and reducing substances
Sulfide must be absent
METHOD PROCEDURE
• Press the Select key to convert the result to mg/L of nitrate (NO3¯).
21
ERROR DESCRIPTIONS
9. ERROR DESCRIPTIONS
The instrument shows clear warning messages when erroneous conditions appear and when
measured values are outside the expected range. These messages are described below.
No Light: The light source is not functioning properly.
Light Leak: There is an excess amount of ambient light
reaching the detector.
Inverted Cuvette: The sample and the zero cuvettes are
inverted.
Light Low: The instrument cannot adjust the light level.
Please check that the sample does not contain any
debris.
Light High: There is too much light to perform a
measurement. Please check the preparation of the zero
cuvette.
Ambient temperature out of limits: The meter is too hot
or too cold for an accurate measurement. Allow the meter
to reach 10 °C to 40 °C (50 °F to 104 °F) before
performing a measurement.
Ambient temperature changed: The temperature of the
meter has changed significantly since the zero
measurement has been performed. A zero measurement
must be performed again.
Out of range: The measured value is outside the limits of
the method.
Battery Low: Battery is low, replace the batteries with
new ones.
22
BATTERY REPLACEMENT
10. BATTERY REPLACEMENT
To replace the instrument’s batteries, follow these steps:
• Turn the instrument off by pressing and holding the
key.
• Remove the battery cover by turning it counterclockwise.
• Remove the old batteries, replace them with three new 1.5V AA batteries.
• Replace the battery cover, turn it clockwise to close.
23
ACCESSORIES
11. ACCESSORIES
11.1. REAGENT SETS
Code
Description
HI93728-01
Nitrate Reagent - 100 tests
HI93728-03
Nitrate Reagent - 300 tests
11.2. OTHER ACCESSORIES
Code
Description
HI7101412
blue carrying case for HI977xx and 2 CAL Check cuvettes
HI731318
cloth for wiping cuvettes (4 pcs.)
HI731331
glass cuvettes (4 pcs.)
HI731336N
cap for cuvette (4 pcs.)
HI93703-50
cuvette cleaning solution (230 mL)
HI97728-11
CAL Check® standards for nitrate - cuvette kit
24
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,
which may be caused by inappropriate handling. For more
information, contact your city, your local household waste disposal
service, the place of purchase or go to www.hannainst.com.
25
Recommendations for Before using this product, make sure it is entirely
suitable for your specific application and for the
users
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.
MAN97728
26
11/18
Warranty The HI97728 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
(engraved on the bottom of the meter) and the nature of the problem.
If the repair is not covered by the warranty, you will be notified of the
charges incurred. If the meter is to be returned to Hanna Instruments,
first obtain a Returned Goods Authorization (RGA) number from the
Technical Service department and then send it with shipping costs
prepaid. When shipping any meter, make sure it is properly packed
for complete protection.
Hanna Instruments reserves the right to modify the design, construction or appearance of
its products without advance notice.
World
Headquarters
Hanna Instruments Inc.
Highland Industrial Park
584 Park East Drive
Woonsocket, RI 02895 USA
www.hannainst.com
Local Office
Hanna Instruments Inc.
Highland Industrial Park
584 Park East Drive
Woonsocket, RI 02895 USA
Phone: 800.426.6287
Fax: 401.765.7575
e-mail: tech@hannainst.com
MAN97728
Printed in ROMANIA
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