Hanna Instruments | HI96701-web | Owner Manual | Hanna Instruments HI96701-web Owner Manual

Hanna Instruments HI96701-web Owner Manual
Free Chlorine ISM
INSTRUCTION MANUAL
HI96701C
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 for a Hanna Instruments
representative near you 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.
TABLE OF CONTENTS
4
PRELIMINARY EXAMINATION...................................................................................................3
5
GENERAL DESCRIPTION...........................................................................................................4
5
ABBREVIATIONS.....................................................................................................................4
6
SPECIFICATIONS.....................................................................................................................5
6
PRECISION AND ACCURACY.......................................................................................................
7
PRINCIPLE OF OPERATION......................................................................................................6
9
FUNCTIONAL DESCRIPTION......................................................................................................7
11
ERRORS AND WARNINGS........................................................................................................9
13
GENERAL TIPS FOR AN ACCURATE MEASUREMENT..................................................................11
14
STARTUP..............................................................................................................................12
15
MEASUREMENT PROCEDURE.................................................................................................12
18
VALIDATION PROCEDURE......................................................................................................15
20
CALIBRATION PROCEDURE.....................................................................................................17
24
GLP.....................................................................................................................................20
25
BATTERY MANAGEMENT........................................................................................................21
26
BATTERY REPLACEMENT........................................................................................................22
26
ACCESSORIES.......................................................................................................................22
3
PRELIMINARY EXAMINATION
Please examine this product carefully. Make sure that the instrument is not damaged. If any damage
occurred during shipment, please contact your local Hanna Instruments Office.
Each HI96701 Ion Selective Meter is supplied complete with:
• Sample Cuvettes and Caps (2 pcs.)
• CAL Check™ standard cuvettes
• 9V Battery
• Scissors
• Cloth for wiping cuvettes
• Instrument quality certificate
• Instruction Manual and Quick Reference Guide
• Rigid carrying case
Note: Save all packing material until you are sure that the instrument works correctly. Any
defective item must be returned in its original packing.
1
4
FREE CHLORINE
The HI96701 is an auto diagnostic portable microprocessor meter that benefits from
Hanna Instruments’ years of experience as a manufacturer of analytical instruments. It has the
advanced optical system based on a special tungsten lamp and a narrow band interference filter
that allows most accurate and repeatable readings. All instruments are factory calibrated and the
electronic and optical design minimizes the need of frequent calibration.
With the powerful CAL CheckTM validation function, you are able to validate good performance
of your instrument at any time. The validation procedure is extremely user friendly. Just use the
exclusive Hanna Instruments ready-made, NIST traceable standards to verify the performance of
the instrument and recalibrate if necessary.
All instruments are splash proof and the lamp and filter units are protected from dust or dirt by
a transparent cup. This makes the instruments fulfill field applications. Display messages aid the
user in routine operation. The meter has an auto-shut off feature that will turn off the instrument
after 10 minutes of non use in measurement mode or after 1 hour if left in calibration mode.
The meter uses an exclusive positive-locking system to ensure that the cuvette is in the same
position every time it is placed into the measurement cell. It is designed to fit a cuvette with a
larger neck making it easier to add both sample and reagents. The cuvette is made from special
optical glass to obtain best results.
The HI96701 meter measures the free chlorine (Cl2) content in water samples in the
0.00 to 5.00 mg/L (ppm) range. The method is an adaptation of the EPA DPD Method 330.5 for
wastewater, and Standard Method 4500-Cl G for drinking water.
The reagent is in powder form and is supplied in packets. The amount of reagent is precisely dosed
to ensure the maximum repeatability.
GENERAL DESCRIPTION
ºC: degree Celsius
ºF: degree Fahrenheit
mg/L: milligrams per liter. mg/L is equivalent to ppm (parts per million)
mL: milliliter
mV: millivolt
EPA: US Environmental Protection Agency
ABBREVIATIONS
5
SPECIFICATIONS
Range
Resolution
Accuracy
@25 °C (77 °F)
Light Source
Light Detector
Method
Environment
Battery Type
Auto-Shut off
Dimensions
Weight
0.00 to 5.00 mg/L
0.01 mg/L from 0.00 to 3.50 mg/L;
0.10 mg/L above 3.50 mg/L
±0.03 mg/L ±3% of reading
Tungsten lamp
Silicon Photocell with narrow band interference filter @525 nm
Adaptation of the EPA DPD method 330.5 and Standard Method
4500-Cl G. The reaction between free chlorine and the DPD reagent
causes a pink tint in the sample.
0 to 50 ºC (32 to 122 ºF); max 95% RH non-condensing
9V (1 pc.)
After 10` of non-use in measurement mode;
after 1 hour of non use in calibration mode;
with last reading reminder
192 x 104 x 69 mm (7.6 x 4.1 x2.7”)
320 g (11.3 oz)
PRECISION AND ACCURACY
REQUIRED REAGENTS
Code
Description
HI93701-0
DPD Powder Reagent
6
Precision is how closely repeated measurements
agree with each other. Precision is usually expressed
as standard deviation (SD).
Accuracy is defined as the nearness of a test result
to the true value.
Although good precision suggests good accuracy,
precise results can be inaccurate. The figure
explains these definitions.
In a laboratory using a standard solution of
1.00 mg/L chlorine and a representative lot
of reagent, an operator obtained with a single
instrument a standard deviation of 0.02 mg/L.
Quantity/test
1 packet
Where:
-log I/Io
Io
I
ελ
c
d
=
=
=
=
=
=
Absorbance (A)
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
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 = ελ c d
or
A = ελ c d
Therefore, the concentration “c” can be calculated from the absorbance of the substance as the
other factors are known.
Photometric chemical analysis is based on the possibility to develop an absorbing compound from a
specific chemical reaction between sample and reagents. Given that the absorption of a compound
strictly depends on the wavelength of the incident light beam, a narrow spectral bandwidth should
be selected as well as a proper central wavelength to optimize measurements.
The optical system of Hanna Instruments’ HI96 series colorimeters is based on special subminiature
tungsten lamps and narrow-band interference filters to guarantee both high performance and
reliable results.
HI96 series block diagram (optical layout)
7
PRINCIPLE OF OPERATION
8
A microprocessor controlled special tungsten lamp emits radiation which is first optically conditioned
and beamed to the sample contained in the cuvette. The optical path is fixed by the diameter of
the cuvette. Then the light is spectrally filtered to a narrow spectral bandwidth, to obtain a light
beam of intensity Io or I.
The photoelectric cell collects the radiation I that is not absorbed by the sample and converts it
into an electric current, producing a potential in the mV range.
The microprocessor uses this potential to convert the incoming value into the desired measuring
unit and to display it on the LCD.
The measurement process is carried out in two phases: first the meter is zeroed and then the actual
measurement is performed.
The cuvette has a very important role because it is an optical element and thus requires particular
attention. It is important that both, the measurement and the calibration (zeroing) cuvettes, are
optically identical to provide the same measurement conditions. Whenever possible use the same
cuvette for both. It is necessary that the surface of the cuvette is clean and not scratched. This to avoid
measurement interference due to unwanted reflection and absorption of light. It is recommended
not to touch the cuvette walls with hands.
Furthermore, in order to maintain the same conditions during the zeroing and the measuring phases,
it is necessary to close the cuvette to prevent any contamination.
1)
2)
3)
4)
GLP/ key
CAL CHECK key
ZERO/CFM key
READ /TIMER key
FUNCTIONAL DESCRIPTION
INSTRUMENT DESCRIPTION
5)
6)
7)
8)
ON/OFF key
Liquid Crystal Display (LCD)
Cuvette alignment indicator
Cuvette holder
KEYPAD DESCRIPTION
• ON/OFF: to turn the meter on and off.
• ZERO/CFM: this is a bi-functional key. Just press to zero the meter prior to measurement, or
to confirm edited values. In calibration mode press to confirm factory calibration restore.
• READ /TIMER: this is a multi-functional key. In measurement mode, press to make a
measurement, or press and hold for three seconds to start a pre-programmed countdown prior
to measurement. In GLP mode press to view the next screen.
• CAL CHECK: this is a bi-functional key. Just press to perform the validation of the meter, or
press and hold for three seconds to enter calibration mode.
• GLP/ : this is a bi-functional key. Just press to enter GLP mode. In calibration mode press
to edit the date and time.
9
FUNCTIONAL DESCRIPTION
OPERATING MODES
• Measurement mode: default operation mode, enables both validation and measurement.
• Calibration mode: may be entered by keeping CAL CHECK pressed for three seconds (the
“CAL” tag appears), it enables calibration of the instrument.
• GLP mode may be entered by pressing GLP/ (“GLP” appears), it enables consulting of
user calibration date or restore factory calibration.
DISPLAY ELEMENTS DESCRIPTION
1) The measuring scheme (lamp, cuvette, detector), appears during different phases of zero or
reading measurement
2) Error messages and warnings
3) The battery icon indicates the charge state of the battery
4) The hourglass appears when an internal check is in progress
5) Status messages
6) The chronometer appears when the reaction timer is running
7) The month, day and date icons appear when a date is displayed
8) Four digit main display
9) Measuring units
10) Four digit secondary display
10
Light High: There is too much light to perform a measurement.
Please check the preparation of the zero cuvette.
Light Low: There is not enough light to perform a measurement.
Please check the preparation of the zero cuvette.
ERRORS AND WARNINGS
The instrument shows clear messages when erroneous condition appears. Messages are also displayed
when the obtained values are outside expected range. The beeper is playing a beep on errors.
a) on zero reading
No Light: The instrument cannot adjust the light level. Please check
that the sample does not contain any debris.
b) on sample reading
Inverted cuvettes: The sample and the zero cuvette are inverted.
Zero: A zero reading was not taken. Follow the instructions of the
measurement procedure for zeroing the meter.
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 cuvette for reference (zero) and measurement.
Over Range: A flashing value of the maximum concentration
indicates an over range condition. The concentration of the sample
is beyond the programmed range: dilute the sample and re-run
the test.
11
ERRORS AND WARNINGS
c) during calibration procedure
Standard Low: The standard reading is less than expected.
Standard High: The standard reading is higher than expected.
d) other errors and warnings
Cap error: Appears when external light enters in the analysis cell.
Assure that the cuvette cap is present.
Cooling lamp: The instrument waits for the lamp to cool down.
Battery low: The battery must be replaced soon.
Dead battery: This indicates that the battery is dead and must
be replaced. Once this indication is displayed, normal operation of
the instrument will be interrupted. Change the battery and restart
the meter.
12
• It is important that the sample does not contain any debris. This would corrupt the reading.
• Each time the cuvette is used, the cap must be tightened to the same degree.
• Whenever the cuvette is placed into the measurement cell, it must be dry outside, and completely
free of fingerprints, oil or dirt. Wipe it thoroughly with HI731318 or a lint-free cloth prior to
insertion.
GENERAL TIPS FOR AN ACCURATE MEASUREMENT
The instructions listed below should be carefully followed during testing to ensure best accuracy.
• Color or suspended matter in large amounts may cause
interference, therefore these should be removed by treatment
with active carbon and by prior filtration.
• For a correct filling of the cuvette: the liquid in the cuvette
forms a concavity on the top; the bottom of this concavity
must be at the same level of the 10 mL mark.
• Proper use of the powder reagent 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.
13
GENERAL TIPS FOR AN ACCURATE MEASUREMENT
• 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.
STARTUP
Prepare the instrument for measurement as follows:
• Unpack the instrument by removing the dust protection sleeve from the instrument cuvette holder.
• Place the battery in the instrument as described in the “BATTERY REPLACEMENT” chapter.
• Place the instrument on a flat table.
• Do not place the instrument under direct sun light.
14
• 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 cuvette 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 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).
• In order to maximize accuracy, prior to a measurement follow the validation procedure to be
sure that the instrument is properly calibrated. If necessary, calibrate the instrument.
• When the beeper sounds briefly and the LCD displays dashes, the meter is ready. The blinking
“ZERO” indicates that the instrument needs to be zeroed first.
MEASUREMENT PROCEDURE
To compensate the meter for the sample turbidity or color, the measurement takes place in two
phases. First, the meter is zeroed using the unreacted sample. After the reagents are added the
reacted sample is measured.
• Turn the meter on by pressing ON/OFF. The display briefly shows all tags on.
• Fill the cuvette with 10 mL of unreacted sample, up to the mark, and replace the cap.
• Place the cuvette into the cuvette holder and ensure that the notch on the cap is positioned
securely into the groove.
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MEASUREMENT PROCEDURE
• Press ZERO/CFM and the lamp, cuvette and detector icons will appear on the display, depending
on the measurement phase.
• After a few seconds, the display will show “-0.0-”. The meter is now zeroed and ready for
measurement.
• Remove the cuvette.
• Add the content of one packet of HI93701-0 Free Chlorine reagent. Replace the cap and shake
gently for 20 seconds.
• Replace the cuvette into the cuvette holder and ensure that the notch on the cap is positioned
securely into the groove.
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16
3''
Alternatively, wait for 1 minute and just press READ /TIMER.
In both cases, the lamp, cuvette and detector icons will appear on the display, depending on the
measurement phase.
MEASUREMENT PROCEDURE
• Press and hold READ /TIMER for three seconds. The display will show the countdown prior
to measurement. The beeper is playing a beep at the end of countdown period.
• At the end of measurement, the instrument directly displays concentration in mg/L of free
chlorine on the LCD.
INTERFERENCES
Bromine (positive error)
Ozone (positive error)
Iodine (positive error)
Oxidized Manganese and Chromium (positive error)
Chlorine dioxide (positive error)
Alkalinity above 250 mg/L CaCO3 or acidity above 150 mg/L CaCO3 will not reliably develop the
full amount of color or it may rapidly fade. To resolve this, neutralize the sample with diluted HCl
or NaOH.
In case of water with hardness greater than 500 mg/L CaCO3, shake the sample for approximately
2 minutes after adding the powder reagent.
17
VALIDATION PROCEDURE
Use the validation procedure to ensure that the instrument is properly calibrated.
Warning: Do not validate the instrument with any standard solutions other than the Hanna Instruments
CAL CheckTM Standards, otherwise erroneous results will be obtained.
• Turn the meter on by pressing ON/OFF.
• When the beeper sounds briefly and the LCD displays dashes, the meter is ready.
• Place the CAL CheckTM Standard HI96701-11 Cuvette A into the cuvette holder and ensure
that the notch on the cap is positioned securely into the groove.
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• Press ZERO/CFM and the lamp, cuvette and detector icons will appear on the display, depending
on the measurement phase.
18
• Remove the cuvette.
• Place the CAL CheckTM Standard HI96701-11 Cuvette B into the cuvette holder and ensure
that the notch on the cap is positioned securely into the groove.
VALIDATION PROCEDURE
• After a few seconds, the display will show “-0.0-”. The meter is now zeroed and ready for
validation.
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HI9
• Press CAL CHECK and the lamp, cuvette and detector icons together with “CAL CHECK” will
appear on the display, depending on the measurement phase.
• At the end of the measurement the display will show the validation standard value.
The reading should be within specifications as reported in the CAL CheckTM Standard Certificate. If
the value is found out of the specifications, please check that the cuvettes are free of fingerprints,
oil or dirt and repeat validation. If results are still found out of specifications, then recalibrate the
instrument.
19
VALIDATION PROCEDURE
Note: It is possible to interrupt calibration procedure at any time by pressing CAL CHECK or
ON/OFF keys.
Warning: Do not calibrate the instrument with standard solutions other than the Hanna Instruments
CAL CheckTM Standards, otherwise erroneous results will be obtained.
• Turn the meter on by pressing ON/OFF.
CALIBRATION PROCEDURE
• Press and hold CAL CHECK for three seconds to enter calibration mode. The display will show
“CAL” during calibration procedure. The blinking “ZERO” asks for instrument zeroing.
• When the beeper sounds briefly and the LCD displays dashes, the meter is ready.
3’’
• Place the CAL CheckTM Standard HI96701-11 Cuvette A into the cuvette holder and ensure
that the notch on the cap is positioned securely into the groove.
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HI9
20
• After a few seconds the display will show “-0.0-”. The meter is now zeroed and ready for
calibration. The blinking “READ” asks for reading calibration standard.
CALIBRATION PROCEDURE
• Press ZERO/CFM and the lamp, cuvette and detector icons will appear on the display, depending
on the measurement phase.
• Remove the cuvette.
• Place the CAL CheckTM Standard HI96701-11 Cuvette B into the cuvette holder and ensure
that the notch on the cap is positioned securely into the groove.
6701
HI9
• Press READ /TIMER and the lamp, cuvette and detector icons will appear on the display,
depending on the measurement phase.
21
CALIBRATION PROCEDURE
• After measurement the instrument will show for three seconds the CAL CheckTM standard value.
Note: If the display shows “STD HIGH”, the standard value was too high. If the display
shows “STD LOW”, the standard value was too low. Verify that both CAL CheckTM Standards
HI96701-11 Cuvettes A and B are free of fingerprints or dirt and that they are inserted
correctly.
• Then the date of the last calibration (e.g.: ”01.08.2009”) appears on the display, or
“01.01.2009” if the factory calibration was selected before. In both cases the year number is
blinking, ready for date input.
Date Input
• Press GLP/ to edit the desired year (2009-2099). If the key is kept pressed, the year number
is automatically increased.
• When the correct year has been set, press ZERO/CFM or READ /TIMER to confirm. Now the
display will show the month blinking.
or
• Press GLP/ to edit the desired month (01-12). If the key is kept pressed, the month number
is automatically increased.
22
or
• Press GLP/ to edit the desired day (01-31). If the key is kept pressed, the day number is
automatically increased.
CALIBRATION PROCEDURE
• When the correct month has been set, press ZERO/CFM or READ /TIMER to confirm. Now
the display will show the day blinking.
Note: It is possible to change the editing from day to year and to month by pressing
READ/TIMER.
• Press ZERO/CFM to save the calibration date.
• The instrument displays “Stor” for one second and the calibration is saved.
• The instrument will return automatically to measurement mode by displaying dashes on the
LCD.
23
GLP
In the GLP mode, the last user calibration date can be verified and the factory calibration can be
restored.
LAST CALIBRATION DATE
To display the calibration date:
• Press GLP/ to enter GLP mode. The calibration month and day will appear on the main
display and the year on the secondary display.
• If no calibration was performed, the factory calibration message, “F.CAL” will appear on the
main display and the instrument returns to measurement mode after three seconds.
FACTORY CALIBRATION RESTORE
It is possible to delete the calibration and restore factory calibration.
• Press GLP/ to enter GLP mode.
• Press READ /TIMER to enter in the factory calibration restore screen. The instrument asks for
confirmation of user calibration delete.
24
again to abort factory
GLP
• Press ZERO/CFM to restore the factory calibration or press GLP/
calibration restore.
• The instrument briefly indicates “donE” upon restoration of factory calibration prior to returning
to measurement mode.
BATTERY MANAGEMENT
To save battery, the instrument shuts down after 10 minutes of non-use in measurement mode and
after 1 hour of non-use in calibration mode.
If a valid measurement was displayed before auto-shut off the value is displayed when the instrument
is switched on. The blinking “ZERO” means that a new zero has to be performed.
One fresh battery lasts for around 750 measurements, depending on the light level.
The remaining battery capacity is evaluated at the instrument startup and after each measurement.
The instrument displays a battery indicator with three levels as follows:
• 3 lines for 100 % capacity
• 2 lines for 66 % capacity
• 1 line for 33 % capacity
• Battery icon blinking if the capacity is under 10 %.
If the battery is empty and accurate measurements can’t be taken anymore, the instrument shows
“dEAd bAtt” and turns off.
To restart the instrument, the battery must be replaced with a fresh one.
25
BATTERY REPLACEMENT
To replace the instrument’s battery, follow the steps:
• Turn the instrument off by pressing ON/OFF.
• Turn the instrument upside down and remove the battery cover by turning it counterclockwise.
• Extract the battery from its location and replace it with a fresh one.
ACCESSORIES
• Insert back the battery cover and turn it clockwise to close.
Reagent Set
HI93701-01
Reagents for 100 tests
HI93701-03
Reagents for 300 tests
Other Accessories
HI96701-11
CAL Check™ Standard Cuvettes (1 set)
HI740029P
9V battery (10 pcs.)
HI731318
Cloth for wiping cuvettes (4 pcs.)
HI731331
Glass cuvettes (4 pcs.)
HI731335
Caps for cuvettes
HI740318
Carrying case
HI93703-50
Cuvette cleaning solution (230 mL)
MAN96701 01/18
26
Recommendations
for Users
Warranty
Before using these products, make sure that they are entirely
suitable for your specific application and for the environment in
which they are used.
Operation of these instruments may cause unacceptable
interferences to other electronic equipments, this 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 put the instrument in microwave
oven. For yours and the instrument safety do not use or store the
instrument in hazardous environments.
HI96701 is warranted for two years against defects in workmanship and
materials when used for its intended purpose and maintained according to the
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 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 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.
Hanna Instruments reserves the right to modify the design, construction and 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 USA
270 George Washington Highway
Smithfield, RI 02917
Phone: 800.426.6287
Fax: 401.765.7575
e-mail: tech@hannainst.com
MAN96701
Printed in ROMANIA
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