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HI97104
pH, Alkalinity,
Free Chlorine,
Total Chlorine and
Cyanuric Acid
Photometer
INSTRUCTION MANUAL
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1. PRELIMINARY EXAMINATION ........................................................................
2. SAFETY MEASURES ......................................................................................
3. SPECIFICATIONS ..........................................................................................
4. ABBREVIATIONS ..........................................................................................
5. DESCRIPTION ..............................................................................................
5.1. GENERAL DESCRIPTION AND INTENDED USE ...........................................
5.2. FUNCTIONAL DESCRIPTION ....................................................................
5.3. PRECISION AND ACCURACY ....................................................................
5.4. PRINCIPLE OF OPERATION .....................................................................
5.5. OPTICAL SYSTEM ..................................................................................
6. GENERAL OPERATIONS .................................................................................
6.1. METER VALIDATION: CAL CHECK / CALIBRATION ......................................
6.2. GLP .....................................................................................................
6.3. LOGGING DATA / LOG RECALL .................................................................
6.4. GENERAL SETUP ...................................................................................
6.5. REAGENTS / ACCESSORIES ....................................................................
6.6. CONTEXTUAL HELP ................................................................................
6.7. BATTERY MANAGEMENT ........................................................................
7. PHOTOMETER ..............................................................................................
7.1. METHOD SELECTION .............................................................................
7.2. COLLECTING AND MEASURING REAGENTS AND SAMPLES .........................
7.2.1. PROPER USE OF POWDER PACKET .....................................................
7.2.2. PROPER USE OF DROPPER BOTTLE ....................................................
7.2.3. PROPER USE OF SYRINGE .................................................................
7.3. CUVETTE PREPARATION .........................................................................
8. METHOD PROCEDURE ..................................................................................
8.1. pH ......................................................................................................
8.2. ALKALINITY ..........................................................................................
8.3. FREE CHLORINE (POWDER REAGENT) .....................................................
8.4. FREE CHLORINE (LIQUID REAGENT) ........................................................
8.5. TOTAL CHLORINE (POWDER REAGENT) ...................................................
8.6. TOTAL CHLORINE (LIQUID REAGENT) ......................................................
8.7. CYANURIC ACID ....................................................................................
9. ERROR DESCRIPTIONS .................................................................................
10. BATTERY REPLACEMENT .............................................................................
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TABLE OF CONTENTS
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11. ACCESSORIES ............................................................................................
11.1. REAGENT SETS ...................................................................................
11.2. OTHER ACCESSORIES ..........................................................................
CERTIFICATION ................................................................................................
RECOMMENDATIONS FOR USERS ......................................................................
WARRANTY .....................................................................................................
TABLE OF CONTENTS
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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 HI97104C 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
• HI97701B ‑ CAL Check Cuvette B for Free and Total Chlorine (Powder & Liquid)
• HI97710B ‑ CAL Check Cuvette B for pH
• HI97722B ‑ CAL Check Cuvette B for Cyanuric Acid
• HI97775B ‑ CAL Check Cuvette B for Alkalinity
• Cloth for wiping cuvettes
• Scissors
• 1.5V AA Alkaline batteries
• Instruction manual
• Meter quality certificate
• CAL Check standard certificates (4 pcs.)
Each HI97104 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.
PRELIMINARY EXAMINATION
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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
SAFETY MEASURES
SPECIFICATIONS
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.
3. SPECIFICATIONS
Range 6.5 to 8.5 pH
pH
Alkalinity
Chlorine
(all methods)
Cyanuric Acid
Resolution 0.1 pH
Accuracy ±0.1 pH of reading at 25 °C
Method Adaptation of Phenol Red method
Range 0 to 500 mg/L (as CaCO3)
Resolution 1 mg/L
Accuracy ±5 mg/L ±5% of reading at 25 °C
Method Colorimetric Method
Range 0.00 to 5.00 mg/L (as Cl2)
Resolution 0.01 mg/L
Accuracy ±0.03 mg/L ±3% of reading at 25 °C
Method
Range 0 to 80 mg/L (as CYA)
Resolution 1 mg/L
Accuracy ±1 mg/L ±15% of reading at 25 °C
Method Adaptation of turbidimetric method
Adaptation of US EPA method 330.5,
DPD Colori metric method
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Measurement
System
Additional
Specifications
Light source Light Emitting Diode
Bandpass filters 525 nm and 610 nm
Bandpass filter
bandwidth
Bandpass filter
wavelength accuracy
Light detector Silicon photocell
Cuvette type Round 24.6 mm diameter (22 mm inside)
Auto logging 50 readings
Display 128 x 64 pixel B/W LCD with backlight
Auto‑off
Battery type 1.5 V AA Alkaline (3 pcs.)
Battery life > 800 measurements (without backlight)
Environment
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 protection
rating
8 nm
±1.0 nm
After 15 minutes of inactivity
(30 minutes before a READ measurement)
0 to 50 °C (32 to 122 °F);
0 to 100% RH, non‑serviceable
IP67, floating case
SPECIFICATIONS
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
DPD N,N‑diethyl‑p‑phenylenediamine
HDPE High Density Polyethylene
GLP Good Laboratory Practice
NIST National Institute of Standards and Technology
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ABBREVIATIONS
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5. DESCRIPTION
5.1. GENERAL DESCRIPTION AND INTENDED USE
The HI97104 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.
DESCRIPTION
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 users step‑by‑step through the measurement process. It
includes all steps required for sample preparation, the required reagents and quantities.
The HI97104 meter measures five important parameters in the treatment and
disinfection of drinking water, waste water, and swimming pools. Chlorine is a widely
used disinfectant, in order for it to be effective the pH of the water should be less then
pH 8.0. Alkalinity is buffering capacity of the water, when alkalinity values are low
the pH will be hard to maintain. Cyanuric Acid is added to increase the life of chlorine,
without it chlorine levels can be reduced by up to 90% in hours when exposed to
sunlight.
The HI97104 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
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5.2. FUNCTIONAL DESCRIPTION
DESCRIPTION
1) ON/OFF power button 3) Liquid Crystal Display (LCD) 5) Indexing mark
2) Keypad 4) Cuvette holder 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.
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5.3. PRECISION AND ACCURACY
Precision is how closely repeated
measurements are to one another.
Precision is usually expressed as
standard deviation (SD).
DESCRIPTION
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
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Io = intensity of incident light beam
I = intensity of light beam after absorption
e
l
= molar extinction coefficient at wavelength l
c = molar concentration of the substance
d = 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.
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5.5. OPTICAL SYSTEM
Instrument Block Diagram
The internal reference system (reference detector) of the HI97104 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.
6. GENERAL OPERATIONS
6.1. METER VALIDATION: CAL CHECK / CALIBRATION
Validation of the HI97104 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.
DESCRIPTION
GENERAL OPERATIONS
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To perform a CAL Check:
1. Press the key to enter menu. Use the
keys to select CAL Check / Calibration and press
Select.
The “Not Available“ message or the date/time
and status of the last CAL Check will be displayed
on the screen.
Note: CAL Check / Calibration is for the selected method. Free and Total Chlorine
GENERAL OPERATIONS
use the same CAL Check / Calibration
2. Press the Check key to start a new CAL Check.
Press the key at any time to abort the
validation 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.
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5. Insert the CAL Check B Cuvette for the selected method (HI97710B for pH,
HI97775 for Alkalinity, HI97701B for Free and Total Chlorine, or HI97722B for
Cyanuric Acid) then press Next to continue. The “Please Wait...“ message will be
displayed during the measurement.
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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.
‑ “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.
GENERAL OPERATIONS
‑ “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.
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6.2. GLP
Press the key to enter the menu. Use 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.
GENERAL OPERATIONS
6.3. 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.
Press the key to enter the menu. Use the functional keys to select Log
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.
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Use the Delete key to erase logged data. After pressing Delete a prompt on display
is asking for confirmation.
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Press No or the key to return to the previous screen.
Press Yes to delete selected log.
Press Del All to erase all the 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.
6.4. GENERAL SETUP
Press the key to enter the menu. Use the keys to select Setup and press
Select. Use the keys to highlight desired option.
Backlight
Values: 0 to 100 %
Press the Modify key to access the backlight intensity.
Use the keys to increase or decrease the value.
Press the Accept key to confirm or the key to
return to the Setup menu without saving the new
value.
GENERAL OPERATIONS
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.
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.
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Press the Accept key to confirm or the key to
return to the previous screen.
Time Format
Option: AM/PM or 24-hour
Press the functional key to select the desired time
format.
Date Format
GENERAL OPERATIONS
Press the Modify key to change the date format.
Use the keys to select the desired format.
Press the Accept key to confirm or the key to
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.
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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.
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Tutorial
Option: Enable or Disable
When enabled, the user will be guided step‑by‑step
through the measurement procedure.
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.
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.
6.5. REAGENTS / ACCESSORIES
Press the key to enter the menu. Use the
keys to select Reagents/Accessories and press
Select to access a list of reagents and accessories. To
exit press the key.
GENERAL OPERATIONS
6.6. CONTEXTUAL HELP
The HI97104 offers an interactive contextual help
mode that assists the user at any time.
To access the help screen press the key.
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.
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6.7. 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
GENERAL OPERATIONSPHOTOMETER
‑ battery below 10%, replace the batteries soon
‑ battery is low, replace the batteries with new ones
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.
7. PHOTOMETER
7.1. METHOD SELECTION
Press Methods when in measurement mode
to access the list of methods. Use the
keys to highlight the desired method then press
Select.
The selected method will be saved when the instrument is powered off.
7.2. COLLECTING AND MEASURING REAGENTS AND SAMPLES
7.2.1. 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
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7.2.2. PROPER USE OF DROPPER BOTTLE
(a) For reproducible results, tap the dropper on the table several times and wipe the
outside of the tip with a cloth.
(b) Always keep the dropper bottle in a vertical position while dosing the reagent.
7.2.3. PROPER USE OF SYRINGE
(a) Push the plunger completely into the syringe and
insert the tip into the solution.
(b) Pull the plunger up until the lower edge of the seal is
exactly on the mark for the desired volume.
(c) Take out the syringe and clean the outside of the
syringe tip, be sure that no drops are hanging on
the tip of the syringe. Then, keeping the syringe in
vertical position above the cuvette, push the plunger
down into the syringe, the desired volume has been
delivered into the cuvette.
PHOTOMETER
7.3. 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.
(a) The mixing method is indicated with “swirl“ using one of the following icons:
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PHOTOMETER
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(b) 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:
(c) The mixing method is indicated with “shake gently“ 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.
Whenever the cuvette is placed 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).
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8. METHOD PROCEDURE
8.1. pH
REQUIRED REAGENTS
Code Description Quantity
HI93710‑0 pH Reagent 5 Drops
REAGENT SETS
HI93710‑01 pH Reagent ‑ 100 tests
HI93710‑03 pH Reagent ‑ 300 tests
For other accessories see page 37.
MEASUREMENT PROCEDURE
• Select the pH method using the procedure described in the Method Selection
section (see page 19).
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.
pH
• Fill the cuvette with 10 mL of unreacted sample (up to
the mark). Replace the plastic stopper and the cap.
• 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.
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• Remove the cuvette.
pH
• Add 5 drops of HI93710‑0 pH Reagent
indicator. Replace the plastic stopper and
the cap. Swirl to mix.
• 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 meter will perform the reading. The instrument displays
the results in pH.
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8.2. ALKALINITY
REQUIRED REAGENTS
Code Description Quantity
HI775S Alkalinity Reagent 1 mL
HI93755‑53 Chlorine Removal Reagent 1 drop
REAGENT SETS
HI775‑26 Akalinity Reagent ‑ 25 tests
For other accessories see page 37.
MEASUREMENT PROCEDURE
• Select the Alkalinity method using the procedure described in the Method
Selection section (see page 19).
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.
ALKALINITY
• Fill the cuvette with 10 mL of unreacted sample (up to
the mark). Replace the plastic stopper and the cap.
• 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.
10 mL
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• Remove the cuvette.
Note: Any chlorine present in the sample will interfere with
the reading. To remove the chlorine interference add one
drop of HI93755-53 Chlorine Removal Reagent to the
ALKALINITY
unreacted sample.
• Add 1mL of HI775S Alkalinity Reagent to the sample using
a 1 mL syringe.
• Replace the plastic stopper and the cap. Invert 5 times to mix.
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• 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 meter will perform the reading. The instrument displays
the results in mg/L calcium carbonate (CaCO3).
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8.3. FREE CHLORINE (POWDER REAGENT)
Note: Free and Total Chlorine have to be measured separately with fresh unreacted
samples following the related procedures if both values are desired.
REQUIRED REAGENTS
Code Description Quantity
HI93701‑0 Free Chlorine Reagent 1 packet
REAGENT SETS
HI93701‑01 Free Chlorine Reagent ‑ 100 tests
HI93701‑03 Free Chlorine Reagent ‑ 300 tests
For other accessories see page 37.
MEASUREMENT PROCEDURE
• Select the Free Chlorine (Powder) method using the procedure described in the
Method Selection section (see page 19).
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 unreacted sample (up to
the mark). Replace the plastic stopper and the cap.
10 mL
FREE CHLORINE (POWDER REAGENT)
• 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.
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• Remove the cuvette.
• Add the content of one packet of HI93701‑0
Free Chlorine Reagent. Replace the plastic
stopper and the cap. Shake gently for
20 seconds.
• 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 1 minute countdown prior to the
FREE CHLORINE (POWDER REAGENT)
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 chlorine
(Cl2).
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INTERFERENCES
Interference may be caused by:
Bromine, Iodine, Ozone, Oxidized forms of Chromium and Manganese. In case of water
with hardness greater than 500 mg/L CaCO3, shake the sample for approximately
2 minutes after adding the powder reagent.
If the water used for this procedure has an alkalinity value greater than 250 mg/L
CaCO3 or acidity value greater than 150 mg/L CaCO3, the color of the sample may
develop only partially, or may rapidly fade. To resolve this, neutralize the sample with
diluted HCl or NaOH.
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8.4. FREE CHLORINE (LIQUID REAGENT)
Note: Free and Total Chlorine have to be measured separately with fresh unreacted
samples following the related procedures if both values are desired.
REQUIRED REAGENTS
Code Description Quantity
HI93701A‑F Free Chlorine Reagent A 3 drops
HI93701B‑F Free Chlorine Reagent B 3 drops
REAGENT SETS
HI93701‑F Free Chlorine Reagent ‑ 300 tests
For other accessories see page 37.
MEASUREMENT PROCEDURE
• Select the Free Chlorine (Liquid) method using the procedure described in the
Method Selection section (see page 19).
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 unreacted sample (up to
the mark). Replace the plastic stopper and the cap.
10 mL
FREE CHLORINE (LIQUID REAGENT)
• 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.
• To an empty cuvette add 3 drops of
HI93701A‑F Free Chlorine Reagent
A and 3 drops of HI93701B‑F Free
Chlorine Reagent B.
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• Swirl gently to mix.
• Add 10 mL of unreacted sample (up to the
mark). Replace the plastic stopper and the
cap. Shake gently to mix.
• Insert the cuvette into the holder
and ensure that the notch on the
cap is positioned securely in the
FREE CHLORINE (LIQUID REAGENT)
groove.
• Press the Read key and the display will show a 1 minute 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 chlorine (Cl2).
10 mL
28
INTERFERENCES
Interference may be caused by:
Bromine, Iodine, Ozone, Oxidized forms of Chromium and Manganese.
In case of water with hardness greater than 500 mg/L CaCO3, shake the sample for
approximately 2 minutes after adding the reagent.
If the water used for this procedure has an alkalinity value greater than 250 mg/L
CaCO3 or acidity value greater than 150 mg/L CaCO3, the color of the sample may
develop only partially, or may rapidly fade.
To resolve this, neutralize the sample with diluted HCl or NaOH.
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8.5. TOTAL CHLORINE (POWDER REAGENT)
Note: Free and Total Chlorine have to be measured separately with fresh unreacted
samples following the related procedures if both values are desired.
REQUIRED REAGENTS
Code Description Quantity
HI93711‑0 Total Chlorine Reagent 1 packet
REAGENT SETS
HI93711‑01 Total Chlorine Reagent ‑ 100 tests
HI93711‑03 Total Chlorine Reagent ‑ 300 tests
For other accessories see page 37.
MEASUREMENT PROCEDURE
• Select the Total Chlorine (Powder) method using the procedure described in the
Method Selection section (see page 19).
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 unreacted sample (up to
the mark). Replace the plastic stopper and the cap.
10 mL
TOTAL CHLORINE (POWDER REAGENT)
• 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.
• Add 1 packet of HI93711‑0 Total Chlorine
Reagent. Replace the plastic stopper and the cap.
Shake gently for 20 seconds.
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• 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 2 minute 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
chlorine (Cl2).
TOTAL CHLORINE (POWDER REAGENT)
30
INTERFERENCES
Interference may be caused by:
Bromine, Iodine, Ozone, Oxidized forms of Chromium and Manganese. In case of
water with hardness greater than 500 mg/L CaCO3 shake the sample for approximately
2 minutes after adding the powder reagent.
If the water used for this procedure has an alkalinity value greater than 250 mg/L
CaCO3 or acidity value greater than 150 mg/L CaCO3, the color of the sample may
develop only partially, or may rapidly fade. To resolve this, neutralize the sample with
diluted HCl or NaOH.
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8.6. TOTAL CHLORINE (LIQUID REAGENT)
Note: Free and Total Chlorine have to be measured separately with fresh unreacted
samples following the related procedures if both values are desired.
REQUIRED REAGENTS
Code Description Quantity
HI93701A‑T Total Chlorine Reagent A 3 drops
HI93701B‑T Total Chlorine Reagent B 3 drops
HI93701C‑T Total Chlorine Reagent C 1 drop
REAGENT SETS
HI93701‑T Total Chlorine Reagent ‑ 300 tests
For other accessories see page 37.
MEASUREMENT PROCEDURE
• Select the Total Chlorine (Liquid) method using the procedure described in the
Method Selection section (see page 19).
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.
TOTAL CHLORINE (LIQUID REAGENT)
• Fill the cuvette with 10 mL of unreacted sample (up to
the mark). Replace the plastic stopper and the cap.
• 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.
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10 mL
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• Remove the cuvette.
• To an empty cuvette add 3 drops of
HI93701A‑T Total Chlorine Reagent
A, 3 drops of HI93701B‑T Total
Chlorine Reagent B, and 1 drop of
HI93701C‑T Total Chlorine Reagent
C. Swirl gently to mix.
• Add 10 mL of unreacted sample (up
to the mark). Replace the plastic
stopper and the cap. Shake gently to
mix.
• 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 2 minute
TOTAL CHLORINE (LIQUID REAGENT)
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 chlorine (Cl2).
10 mL
32
INTERFERENCES
Interference may be caused by:
Bromine, Iodine, Ozone, Oxidized forms of Chromium and Manganese. In case of
water with hardness greater than 500 mg/L CaCO3 shake the sample for approximately
2 minutes after adding the reagent.
If the water used for this procedure has an alkalinity value greater than 250 mg/L
CaCO3 or acidity value greater than 150 mg/L CaCO3, the color of the sample may
develop only partially, or may rapidly fade. To resolve this, neutralize the sample with
diluted HCl or NaOH.
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8.7. CYANURIC ACID
REQUIRED REAGENTS
Code Description Quantity
HI93722‑0 Cyanuric Acid Reagent 1 packet
REAGENT SETS
HI93722‑01 Cyanuric Acid Reagent ‑ 100 tests
HI93722‑03 Cyanuric Acid Reagent ‑ 300 tests
For other accessories see page 37.
MEASUREMENT PROCEDURE
• Select the Cyanuric Acid method using the procedure described in the Method
Selection section (see page 19).
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.
CYANURIC ACID
• Fill the first cuvette with 10 mL of unreacted sample (up
to the mark). Replace the plastic stopper and the cap.
• 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.
10 mL
# 1
33
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• Fill a beaker with 25 mL sample (up to the mark).
• Add one packet of HI93722‑0 Cyanuric Acid Reagent
CYANURIC ACID
and mix to dissolve.
• Fill a second cuvette with 10 mL of the reacted sample
(up to the mark), replace the plastic stopper and the cap.
• 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 45 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 cyanuric
acid.
10 mL
# 2
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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.
ERROR DESCRIPTIONS
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.
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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.
BATTERY REPLACEMENT
36
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11. ACCESSORIES
11.1. REAGENT SETS
Code Description
HI775‑26 Alkalinity Reagent ‑ 25 tests
HI93701‑01 Free Chlorine Reagent ‑ 100 tests (powder)
HI93701‑03 Free Chlorine Reagent ‑ 300 tests (powder)
HI93701‑F Free Chlorine Reagent ‑ 300 tests (liquid)
HI93701‑T Total Chlorine Reagent ‑ 300 tests (liquid)
HI93710‑01 pH Reagent ‑ 100 tests
HI93710‑03 pH Reagent ‑ 300 tests
HI93711‑01 Total Chlorine Reagent ‑ 100 tests (powder)
HI93711‑03 Total Chlorine Reagent ‑ 300 tests (powder)
HI93755‑53 Chlorine Removal Reagent
HI97722‑01 Cyanuric Acid Reagent ‑ 100 tests
HI97722‑03 Cyanuric Acid Reagent ‑ 300 tests
11.2. OTHER ACCESSORIES
Code Description
HI7101415 blue carrying case for HI977xx and 5 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)
HI740034P cap for 100 mL beaker (10 pcs.)
HI740036P 100 mL plastic beaker (10 pcs.)
HI740142P 1 mL graduated syringe (10 pcs.)
HI740143 1 mL graduated syringe (6 pcs.)
HI740144 pipette tip (6 pcs.)
HI97701‑11 CAL Check® standards for free and total chlorine ‑ cuvette kit
HI97710‑11 CAL Check® standards for pH ‑ cuvette kit
HI97722‑11 CAL Check® standards for cyanuric acid ‑ cuvette kit
HI97775‑11 CAL Check® standards for alkalinity ‑ cuvette kit
ACCESSORIES
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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.
38
Recommendations for
users
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Before using this product, 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.
MAN97104 11/18
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Warranty
The HI97104 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.
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