Hanna Instruments HI 84430 User manual

1
Instruction Manual
HI 84430
TOTAL ACIDITY
MINITITRATOR & pH METER
for Water Analysis
www.hannainst.com

32
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.
Dear Customer,
Thank you for choosing a Hanna product. This manual will provide you with the necessary
information for the correct use of the instrument. Please read it carefully before using the meter.
If you need additional technical information, do not hesitate to e-mail us at [email protected].
This instrument is in compliance with directives.
TABLE OF CONTENTS
PRELIMINARY EXAMINATION................................................................................................. 4
GENERAL DESCRIPTION ........................................................................................................ 4
SPECIFICATIONS ................................................................................................................... 6
PRINCIPLE OF OPERATION .................................................................................................... 8
FUNCTIONAL AND PHYSICAL DESCRIPTION............................................................................. 9
TITRATOR STARTUP ........................................................................................................... 11
SETUP CONFIGURATION MENU .......................................................................................... 12
ELECTRODE PREPARATION .................................................................................................. 18
ELECTRODE CALIBRATION PROCEDURE................................................................................. 19
pH BUFFER TEMPERATURE DEPENDENCE ............................................................................ 23
PUMP TUBE INSTALLATION................................................................................................. 24
PURGE .............................................................................................................................. 24
PUMP CALIBRATION PROCEDURE ........................................................................................ 26
TITRATION PROCEDURE ..................................................................................................... 29
pH MEASUREMENT ............................................................................................................ 34
TEMPERATURE CALIBRATION PROCEDURE (for technical personnel only) ............................... 38
PC INTERFACE ................................................................................................................... 40
TROUBLESHOOTING GUIDE ................................................................................................ 44
ELECTRODE CONDITIONING & MAINTENANCE ...................................................................... 45
ACCESSORIES ..................................................................................................................... 46
WARRANTY........................................................................................................................47

54
The instrument employs a powerful and effective built-in algorithm to analyze the pH response to
determine the exact pH endpoint, then uses this to make the necessary calculations. The Titratable
Acidity determination is instantaneously displayed in selected measurement units on the large dot
matrix display. The instrument is ready for the next analysis immediately.
Other features:
• Log on demand up to 100 samples (50 for pH measurement; 50 for titration results)
• GLP feature, to view last calibration data for pH electrode and pump
• PC interface via USB connection
MEASUREMENT SIGNIFICANCE
Acidity is the quantitative capacity of the water sample to react with a strong base solution in order
to obtain a pH end point value. Acids contribute to the corrosive capacity of the water, influence the
chemical reaction rates and biological processes.
The results of acidity measurement also reflect the quality of the waters (surface, drinking, waste
waters) and are an essential monitoring device to define and control the pollution. Strong acids
(such as mineral acids: HNO3, H2SO4, HCl) and weak acids (such as organic acids), carbon dioxide
content in water, or others acid components (some polyvalent cations such as aluminium, iron,
manganesse, chromium, cadmium trivalent cations) can contribute to the acidity of water. According
to the Standard Methods for the Examination of Waters and Wastewaters, Volume 20, three options
exist to determine water acidity:
•pH measurement using the meter in pH mode.
•Strong acidity determination by titration of the water samples with alkaline reagent to a
3.7 pH end point (known as methyl orange acidity).
•Total acidity determination by titration of the water samples with alkaline reagent to a
8.3 pH end point (known as phenolphthalein acidity).
Potentiometric end point determination, using a pH electrode, is more objective than visual end
point determination, using color changing indicators. The HI 84430 is a potentiometric titrator.
The volume of dispensing titrant necessary to reach the end point is used to calculate the water
acidity, expressed in mg/L as CaCO3(most usual unit) or meq/L as CaCO3.
Interferences:
•dissolved gases, lost or gained during sample storage or transport, can modify the acidity
of the samples;
•the presence in the samples of: precipitates, solids suspensions, oils;
•samples containing polyvalent cations (aluminum, iron, manganese, chromium) may
react slowly with the titrant causing a drifting end point;
To eliminate or diminish the interference effects, it is recommended:
• to treat the samples that contain polyvalent cations with hydrogen peroxide in order to
increase the hydrolyzing rate of metal ions present.
•to protect the samples against atmospheric action (store in an airtight vessel).
•to avoid vigorous shaking or mixing: stir gently.
Please examine this product carefully. Make sure that the instrument is not damaged. If any
damage occurred during shipment, please notify your Dealer.
Each HI 84430 minititrator is supplied complete with:
•HI 1131B pH electrode
•HI 7071 Filling solution (30 mL)
•HI 7662-M Temperature probe
•HI 84430-50 Titrant low range (100 mL)
•HI 84430-51 Titrant high range (100 mL)
•HI 84430-55M Pump calibration solution (230 mL)
•HI 84430-58 Additional reagent (30 mL)
•HI 7061 Cleaning solution
•HI 7001M pH 1.68 buffer solution (230 mL)
•HI 7004M pH 4.01 buffer solution (230 mL)
•HI 70083M pH 8.30 buffer solution (230 mL)
• Two 100 mL beakers
• Two tube sets with dispensing tip
• Stir bars (medium 2 pcs.)
• 12 Vdc power adapter
• Instruction manual
Note:Save all packing material until you are sure that the instrument works correctly.
Any defective item must be returned in its original packing.
PRELIMINARY EXAMINATION
The HI 84430 is an easy to use microprocessor-based automatic minititrator and pH meter designed
for the rapid and accurate analysis of Total Titratable Acidity in water. By eliminating subjective
factors including color indicators, errors in mathematical calculations or erratic titrant additions from
the measurement, the HI 84430 makes Total Titratable acidity analysis precisely. This will quickly
become a valuable analysis tool of waters and waste waters.
The instrument benefits from Hanna’s many years of experience as manufacturer of quality analytical
instruments. A clear and well-designed user interface makes the instrument intuitive and simple to
use. A dedicated HELP key aids in set-up, calibration, status and troubleshooting.
By simply pressing the START key, the HI 84430 automatically starts pump operation and titrates
the sample to the end point. The HI 84430 has a simple and accurate peristaltic pump to ensure the
best accuracy and repeatability. By performing pump calibration with the Hanna standard provided,
the instrument accuracy is assured.
GENERAL DESCRIPTION

76
REQUIRED REAGENTS
Code Description Quantity/Test
HI 84430 - 50 Titrant (Low Range) 1 mL
HI 84430 - 51 Titrant (High Range) 1 mL
HI 84430 - 55M Pump Calibration Solution 2 mL for low range
20 mL for high range
Electrode HI 1131B (included)
Temperature Probe HI 7662-M (included)
Environment 0 to 50 °C (32 to 122 °F); max 95% RH non-condensing
Power supply 12 Vdc power adapter
Dimensions 208 × 214 × 163 mm (8.2×8.4×6.4”) (with beaker)
Weight 2200 g (77 oz.)
SPECIFICATIONS
Titrator Range Titratable acidity (low range)
mg/L : 15.0 - 500.0 mg/L as CaCO3
meq/L : 0.3 - 10.0 meq/L as CaCO3
Titratable acidity (high range)
mg/L : 400 - 4000 mg/L as CaCO3
meq/L : 8 - 80 meq/L as CaCO3
Resolution Titratable acidity (low range):
0.1 mg/L
0.1 meq/L
Titratable acidity (high range):
1mg/L
1meq/L
Accuracy 5% of reading
Titration method Acid-base titration (total acidity / strong acidity)
Principle End point titration : 8.3 pH / 3.7 pH
Pump debit 0.5 mL/min
Stirring speed 600 rpm
Log data Up to 50 samples
pH meter pH meter -2.0 to 16.0 pH / -2.00 to 16.00 pH
pH Resolution: 0.1 pH / 0.01 pH
pH Accuracy: ± 0.01 pH
pH Calibration: 1, 2 or 3 calibration points;
3 available buffers (1.68; 4.01; 8.30)
Temperature manual or automatic from
compensation: -20 to 120 °C (-4 to 248 °F)
Log data Up to 50 samples
Temperature Range -20.0 to 120.0 °C (-4.0 to 248.0 °F)
Resolution 0.1 °C
Accuracy ±0.4 °C without probe error

98
PRINCIPLE OF OPERATION
Water acidity determination is based on the neutralization of all acidic species contained in water
samples by titration with base solutions (the titrant alkaline reagent):
H++OH-H2O
In an ideal solution, the end point of an acid titration corresponds stoichiometrically to the complete
neutralization of the acids present.
Water acidity results from strong and weak acids, and from the hydrolysis of salts. Due to these
more complex mixtures, end points for water acidity are arbitrarily fixed on practical considerations.
Unpolluted surface waters contain carbon dioxide as the main acidic component and titration of
these samples corresponds to stoichiometric neutralization of carbonic acid (titration to 8.3 pH at
25°C degrees). Strong acidity of the polluted waters is determined by titration to 3.7 pH. If the
samples are suspected to contain hydrolizable salts or polyvalent cations (such as chromium, iron,
manganese), it is necessary to pretreat the samples with a HI 84430-58 reagent (see Sample
preparation /Titration).
A potentiometric acid-base titration employs an indicator electrode (such as a pH sensor) to establish
the end point of the titration.
The HI 84430 minititrator is designed to determine the acidity of waters by potentiometric titration
in a low range (15-500mg/mL as CaCO3) and in a high range (400-4000mg/mL as CaCO3).
Both Strong and Total acidity can be determined by the HI 84430, however the actual sample pH
may limit your choice. If the measured pH is lower than 3.7 both total and strong acidity can be
determined. If the sample pH is greater than 3.7 only total acidity can be determined.
The HI 84430 utilizes two different titrant solutions to cover the entire measurement range. The
titrants used have different concentrations, appropriate for each work range. Low Range measurements
use HI 84430-50 titrant. High Range measurements use HI 84430-51 titrant. If the range is
changed, the titrant and the tube set must be changed and the peristaltic pump must be purged and
recalibrated. The standard solution (HI 84430-55M) is used for pump calibration for both working
ranges, but the pump calibration solution volume used is different.
Titratable Acidity in waters, as performed on the HI 84430 minititrator, utilizes a simple sample
preparation, a high quality peristaltic dosing pump for titrant, potentiometric endpoint detector and
instantaneaous computations. To maintain the high precision of the titrator, a simple pump calibra-
tion procedure is required. A range change requires different titrant and a pump recalibration. The
pump calibration involves the analysis of a known volume of a known solution (standard provided)
and compensates for changes in pump dosing that may occur due to many factors including tube
stretching or aging. This procedure should be performed regularly.
OVERHEAD VIEWOVERHEAD VIEW
OVERHEAD VIEWOVERHEAD VIEW
OVERHEAD VIEW
1. Titrant bottle
2. Graphic LCD
3. Keypad
4. Dedicated guide tube
for Temperature Probe
5. Electrode holder
6. Dedicated guide tube for titrant tip
7. Peristaltic pump tube
FRONT VIEWFRONT VIEW
FRONT VIEWFRONT VIEW
FRONT VIEW
REAR VIEWREAR VIEW
REAR VIEWREAR VIEW
REAR VIEW
8. Temperature probe
9. pH Electrode
10. Beaker
11. BNC electrode connector
12. Temperature probe socket
13. USB connector
14. Power switch
15. Power adapter connector
16. Peristaltic pump
FUNCTIONAL AND PHYSICAL DESCRIPTION

1110
PERISTALTIC PUMP
Peristaltic pumps are self priming. Liquid never contacts the pump components. The titrant tubing
is pressed along the rotating rollers of the pump. The rollers compress the tubing, driving the
titrant to the dispensing tip.
TITRATOR STARTUP
This is a general outline of the steps required to make a titration. The following sections expand
upon each section.
• Place the instrument on a flat table. Do not place the instrument in direct sun light.
• Connect the power adapter to the instrument.
• Turn the instrument ON using the power switch from the rear panel of the instrument.
• Set up the instrument. See the “Setup Configuration Menu” section for details. Pay attention
to the Acidity Type.
• Connect the pH electrode and the temperature probe to the instrument.
• Calibrate the pH electrode. At least a single point calibration is necessary for titration.
• Place the peristaltic pump tube on the pump (inlet tube is connected with the reagent bottle,
outlet tube is connected with the dosing tip). See the “Pump Tube Replacement” section for
the procedure.
• Remove the reagent bottle cap and replace the bottle cap with the tubes. Place the reagent
bottle in the appropriate place on the titrator top.
• Purge the titrant.
• Calibrate the pump.
• Prepare the sample.
• Run a titration and log sample results.
5. Functional key area
6. Indicates that the displayed value can be changed using ARROW keys
7. Temperature value (°C, °F)
8. pH temperature compensation mode (Manual or Automatic)
9. Stirrer and reading status area
ESC - used to leave the current screen and to return either to the previous screen or to the
main screen. When pressed while modifying a parameter within the SETUP menu,
exits parameter without changing it.
/ - used to modify the parameters’ values, to scroll the information displayed while
viewing a help or to move between the options from the instrument’s SETUP
HELP - used to access/leave the instrument’s contextual help
MENU - used to enter SETUP, Recall or GLP selection menu, while instrument is in pH or
Titration main screen
STIR - used to start/stop the stirrer.
Note: The stirer starts automatically during pump calibration and titration and cannot be
stopped by pressing STIR key.
1. Current time and instrument mode information (pH meter or Titrator)
2. pH electrode condition information
3. Main reading information
4. Instrument status information
GUIDE TO INDICATORS
During the instrument’s operation a set of information is displayed on the LCD.
Displayed icons:
Unstable reading.
Stirrer on.
Pump running.
Parameter can be changed.
1
5
2
3
4
9
6
8
7
KEYPAD FUNCTION AND INDICATORS

1312
From your knowledge of expected concentrations, use the table below to determine which
settings are appropriate:
Use Total LR or Strong LR for waters acidity in the 15 - 500 mg/L range.
Use Total HR or Strong HR for waters acidity in the 400 - 4000 mg/L range.
Use the appropriate titrant for each range.
Also, the pump must be recalibrated when the measurement range is changed.
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3
Use the ARROW keys in order to increase/decrease
the value.
Press Accept to confirm or ESC to return to the
setup menu without saving the new value.
pH resolution
Options: 0.1, 0.01.
Press the displayed function key in order to change
the pH resolution.
Options:
° C, ° F.
Press the function key in order to change the
temperature unit.
Temperature unit
Options: 0 to 8.
Press Modify to access the backlight level.
Backlight
Calibration timeout
Options: Disabled or 1 to 7 days.
This option is used to set the number of days before
the pH calibration expired warning message is flagged.
Press Modify to access the calibration timeout
value modify parameter.
Acidity type
SETUP CONFIGURATION MENU
Options: mg/L, meq/L.
Press the corresponding function key to change the
option.
Concentration unit
The titrator’s setup configuration menu may be accessed from the pH or titration screens by
pressing the MENU key, then Setup.
A list of setup parameters will be displayed with currently configured setting.
While in the setup menu it is possible to modify the instrument’s operation parameters. The
ARROW keys permit the user to scroll the setup parameters.
Press HELP to view the contextual help.
Press ESC to return to the main screen.
Options:Total LR (total acidity low range)
Total HR (total acidity high range)
Strong LR (strong acidity low range)
Strong HR (strong acidity high range)
Press the corresponding function key to change
the option.

1514
Press the corresponding function key to change the
language.
If the new selected language cannot be loaded, the
previously selected language will be reloaded.
If no language can be loaded at startup the instrument
will work in the “safe mode”. In “safe mode” all
the messages are displayed in English and tutorial
and help information are not available.
Language
Use the ARROW keys to select the desired format.
Press Accept to confirm the value or ESC to
return to the setup menu.
Date format
Press Modify to change the Date Format.
This option is used to enable/disable tutorial mode.
If enabled this option will provide the user short
guides on the screen.
Press the function key to select this option.
Tutorial
Option: AM/PM or 24 hours.
Press the functional key to select the new value.
Time format
Press / to highlight the value to be modified
(year, month, day, hour, minute or second). Use
the ARROW keys to change the value.
Press Accept to confirm the new value or ESC to
return to the setup.
This option is used to set the instrument’s date and
time.
Press Modify to change the date/time.
Use the ARROW keys or / in order to
increase/decrease the value.
Press Accept to confirm the value or ESC to return
to the setup menu.
Option: 0to 20.
This option is used to set the display’s contrast.
Press Modify to change the display’s contrast.
Use the ARROW keys or / in order to
increase/decrease the displayed constrast.
Press Accept to confirm or ESC to return to the
setup menu.
Contrast
Date / Time

1716
Press Select to view the firmware version, language
version, mV factory calibration date and time and
temperature factory calibration date and time.
Press ESC to return to the Setup mode.
Meter information
Press Modify to access the baud rate screen. Use
ARROW to scroll through baud rate values and press
Accept to confirm the selection or ESC to return to
the setup menu without saving the new value.
Options: 600, 1200, 2400, 4800, 9600, 19200,
38400 bps.
This parameter is used for setting the speed of the
serial link between the instrument and a PC. Both
must use the same setting.
Baud rate
Option: 0 to 9999.
This option is used to set the instrument’s ID. The
instrument ID is used while exchanging data with a
PC.
Instrument ID
Press Modify to access the instrument ID screen.
Press ARROW in order to select the desired value
between 0 and 9999. Press Accept to confirm the
value or ESC to return to the setup menu without
saving the new value.
Press the function key to select the new option. When
enabled, a short beep is heard every time a key is
pressed or when the calibration can be confirmed.
A long beep alert sounds when the pressed key is
not active or a wrong condition is detected while in
calibration.
Beep On

1918
ELECTRODE CALIBRATION PROCEDURE
It is recommended to calibrate the instrument frequently, especially if high accuracy is required.
The pH electrode should be recalibrated:
a) Whenever the pH electrode is replaced
b) At least once a week
c) After testing aggressive chemicals and after electrode is cleaned
d) When high accuracy is required
e) If the pH calibration expired warning is displayed during measurement. Every time
you calibrate the instrument clean the electrode (see the “pH Cleaning Procedure” section) and
use fresh buffers.
PROCEDURE
A single, two or three-points calibration can be performed, using the three predefined buffers
1.68, 4.01 and 8.30 pH. For a single point calibration any of the three buffers may be used,
but using 8.30 pH is recommended.
Note: The HI 84430 will not accept other pH buffers for calibration.
•
Pour small quantities of selected buffer solutions into clean beakers. For accurate calibration
use two beakers for each buffer solution, the first one for rinsing the electrode and the second
one for calibration.
• Put a magnetic stir bar in each beaker with the calibration buffer solution.
•
Remove the protective cap, open the fill hole and rinse the electrodes with some of the buffer
solution to be used for the first calibration point.
• Put the first beaker with calibration buffer in the beaker holder.
• Place the electrode holder on the top of the beaker and secure it by turning clockwise.
•
Insert the temperature probe into the dedicated tube guide.
•
Immerse the pH electrode and the temperature probe approximately 2 cm (0.8”) into the
buffer paying attention not to touch the stir bar.
To select Electrode calibration screen follow the next steps:
• From pH meter screen press CAL function key then Electrode.
• From Titrator screen press CAL function key then Electrode.
• The electrode calibration screen will be displayed.
Point 1 calibration
•
The 8.30 buffer will be selected by default. If necessary press the ARROW keys in order to
select a different buffer value.
• The (unstable measurement) symbol will be shown on the display until the reading becomes stable.
ELECTRODE PREPARATION
PREPARATION PROCEDURE
Remove the electrode protective cap.
DO NOT BE ALARMED IF ANY SALT DEPOSITS ARE PRESENT. This is normal with electrodes and
they will disappear when rinsed with distilled water.
During transport tiny bubbles of air may have formed inside the glass bulb. The electrode cannot
function properly under these conditions. These bubbles can be removed by "shaking down" the
electrode as you would do with a glass thermometer.
If the bulb is dry, soak the electrode in HI 70300 Storage Solution for at least one hour.

2120
•
The calibrated value will be shown on the display and the third expected buffer value will be
automatically selected.
• After the second calibration point has been confirmed, press ESC to exit without performing the
third calibration point.
Point 3 calibration
• Remove the electrode holder with electrodes from the top of the beaker.
• Place the third buffer solution in a beaker and place in beaker holder. Rinse the probes in a
beaker with third buffer rinsing solution.
• Place the electrode holder (with electrode) in the beaker with third buffer and secure top by
locking. Press STIR.
• If necessary press the
ARROW keys in order to select correct buffer value.
• The (unstable measurement) symbol will be shown on the display until the reading
becomes stable.
• When the reading is stable and close to the selected buffer, the (unstable measurement)
symbol will disappear and the Confirm key will become active.
• Press Confirm to confirm the calibration. The instrument stores the calibration value and returns to pH
meter/titrator calibration menu, where the date and time for the last pH calibration will be updated.
Notes:
• A buffer confirmed during the calibration process is removed from the list of calibration buffers
available for further calibration points.
• If the value measured by the instrument is not close to the selected buffer a “Wrong Buffer”
error message will be shown on the display.
Check if the correct buffer has been used or regenerate the pH electrodes by following the
Cleaning Procedure (see the “pH Cleaning Procedure” section). If necessary change the buffer
or the electrode.
•
When the reading is stable and close to the selected buffer, the (unstable measurement)
symbol will disappear and the Confirm key will become active.
• Press Confirm to confirm the calibration.
• Press ESC to exit calibration.
Notes: • To clear a previous calibration and to return to the default value, press Clear at any time
after entering calibration mode. The “Calibration cleared” message will be shown for
a few seconds on the display. If Clear is invoked during the first calibration point the
instrument returns to the measurement mode.
• The Clear key is displayed only if a previous calibration exists.
Point 2 calibration
•
The calibrated value will be shown on the display and the second expected buffer value will be displayed.
• Remove the electrode holder with electrodes from the top of the beaker.
•
Place the second buffer into the beaker and place in beaker holder. Rinse the electrodes in a
beaker containing the second buffer rinsing solution.
• Place the electrode holder (with electrodes) on the top of the beaker, lock cap by turning.
• If necessary press the ARROW keys in order to select a different buffer value.
• The (unstable measurement) symbol will be shown on the display until the reading becomes stable.
• When the reading is stable and close to the selected buffer, the (unstable measurement)
symbol will disappear and the Confirm key will become active.
• Press Confirm to confirm the calibration.

2322
• If the measured offset isn’t within the preset limits the meter will display the message “Buffer
Contaminated” alternatively with ”Electrode Dirty/Broken”.
• If the computed slope isn’t within the preset limits the meter will display the message “Wrong
Slope”. If the slope is too high the symbol will be displayed. If the slope is too low the
symbol will be displayed.
• If the “Wrong Old Slope” error message is displayed, an inconsistency exists between the
current and the previous (old) calibration. Clear the calibration parameters by pressing Clear
and proceed with calibration from the current calibration point. The instrument will keep all the
confirmed values during the current calibration point.
• If the temperature reading is out of the defined temperature range of the buffer (0 to 45°C)
the “Wrong Buffer Temperature” error message will be displayed, and the symbol
° C will
blink on the display. Calibration cannot be confirmed in this situation.
The temperature has an effect on pH. The calibration buffer solutions are affected by temperature changes
to a lesser degree than normal solutions. During calibration the instrument will automatically calibrate to
the pH value corresponding to the measured or set temperature.
During calibration the instrument will display the pH buffer value at 25 °C.
pH BUFFER TEMPERATURE DEPENDENCE
PMETSREFFUBHp
C°F°86.110.403.8
02376.110.484.8
51476.100.444.8
010576.100.414.8
519576.100.473.8
028686.100.433.8
527786.110.403.8
0
36886.120.472.8
535996.130.442.8
04401 96.140.412.8

2524
• Press CAL to access the titration calibration menu where electrode and pump calibration may be accessed.
• Press HELP to view the contextual help.
• Press Continue or ESC to skip the message and enter titrator main screen.
• Press Purge to begin a purge cycle.
The purging stops automatically after 5 minutes.
To stop purging at any time and return to the main screen press ESC or Stop.
During a purge, a countdown timer displays remaining time in 5 minute purge.
• Press Pause to interrupt the purge process.
• Press Pause or Stop (by pressing the corresponding function key in the purge screen)
• after the first drops of fresh titrant appear at the dosing tip
• in case an error condition is observed (empty titrant bottle, tubes or dosing tip
disconnected, pump error)
• if you want to resume at a later time
If Pause is pressed the next screen is displayed:
Press Resume to continue purging.
PURGE
Purging should be performed:
• whenever the tube of the peristaltic pump is replaced;
• whenever the titrant is changed or a new bottle of titrant is used;
• before starting a pump calibration;
• before starting a lot of titrations.
In order to start purging press the Purge key from the titrator main screen. The purging stops
automatically after 5 minutes.
To access the Purge key follow the next steps.
• From the instrument main screen (pH meter screen) press “Titrator” function key.
The instrument will display the next screen if tutorial is enabled and if any of the following
conditions exist:
- the meter hasn’t been calibrated in 8.30 pH buffer
- the pH calibration has expired
- a pump calibration hasn’t been performed or more than 3 days have passed since the last
pump calibration
PUMP TUBE INSTALLATION
To mount the new peristaltic pump tube set follow next steps:
• Position one peristaltic pump fixing ring on its location.
• Stretch the tube over the peristaltic pump rolls.
• Attach the second pump fixing ring on its location.
• Attach the tube to the reagent bottle. Choose which titrant
is required for expected range. See table in Acidity
Type section.
Note: Purge the peristaltic pump until drops of reagent appears on the dosing tip by pressing the
PURGE key from the titrator main screen.
To remove the tube of the peristaltic pump follow next steps:
Caution: Purge line with water to remove titrant solution from tube.
• Detach the tubes system from the reagent bottle.
• Grasp one fixing ring of the peristaltic pump tube.
• Pull the tube until the fixing rings are taken out from their location.
• Remove the other side of the tube.

2726
•
Press Pump.
The next screen will be displayed.
• Press Start.
• After the pump calibration is started, on the upper right side of the display two animations will be
shown in order to indicate that the pump and the stirrer are working. On the lower right side of
the display is shown the amount of time that has passed since the beginning of the calibration.
Note: The chemical reagents may be hazardous if improperly
handled. Read Health and Safety Data Sheets before performing
the test.
• From the titrator main screen press CAL.
The instrument displays the date and time of the last electrode calibration, and the date and
time of the last pump calibration, or calibration expired messages.
Verify: The electrode has been calibrated in 8.30 pH buffer.
•Sample preparation: Precisely measure the amount of HI 84430-55 Pump Calibration
Solution as indicated below and add to a clean beaker:
Fill the beaker up to the 50 mL mark with the distilled or
deionized water. Place the stir bar into the beaker and then place
the beaker in the appropriate place on the instrument top.
• Place the electrode holder on the top of the beaker and secure
it by turning clockwise.
• Immerse the pH electrode approximatively 2 cm (0.8”) into
the standard paying attention not to touch the stir bar.
• Insert the temperature probe into the dedicated guide tube.
• Verify if the titrant correspondes to selected titration range.
For Low Range (Strong LR, Total LR) use the HI 84430-50.
For High Range (Strong HR, Total HR) use the HI 84430-51.
• Carefuly insert the dosing tip into the dedicated guide tube.
After the 5 minutes purging interval has elapsed the “Completed” message is displayed. Another
purge period can be initiated by pressing Restart or press Esc to return to main titrator screen.
PUMP CALIBRATION PROCEDURE
The calibration of the pump must be performed each time the pump tube, the reagent bottle or
the pH electrode is changed. It is recommended to perform the pump calibration before each set
of titrations.
TINU egnaRwoL
)elpmasLm05(
egnaRhgiH
)elpmasLm05(
L/gm 0.005ot0.510004ot004
L/qem 0.01ot3.008ot8
Please set up the instrument before performing the pump calibration.
•
Select the acidity type in SETUP menu to correspond with expected sample:
Low Range (Strong LR, Total LR) - 2 ml
High Range (Strong HR, Total HR) -20 ml

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Verify: The instrument has been calibrated (pH and pump) before performing a lot of titrations.
An electrode calibration in at least one point (8.30 pH buffer) is recommended.
• Sample preparation: For all measurement samples,
pour 50 mL of sample into the beaker provided. Place the
stir bar into the beaker and then place the beaker in the
appropriate place on the instrument top.
Notes: • Water samples must be collected and stored in
capped botlles. Avoid disturbing any sediment in
the sample.
• For samples containing metallic ions (iron,
aluminium, chromium, manganesse) it is neccesary
to add few drops (4-5) of an additional reagent
(HI 84430-58) in order to increase the rate of
hydrolysis at the metal ions present. Boil the
solution 2-4 minute and cool to room temperature
before titration.
• Place the electrode holder on the top of the beaker and
secure it by turning clockwise.
• Insert the temperature probe into the dedicated guide
tube.
• Immerse the pH electrode approximatively 2 cm (0.8”) into
the sample to be tested paying attention not to touch the
stir bar. Use O-Rings provided to secure the pH electrode
in holder.
• Insert the dosing tip in the appropriate holder place.
TITRATION PROCEDURE
• After the pump calibration is complete a confirmation message is displayed for a few seconds,
then the instrument will return to the titrator calibration menu and will display the new time and
date for the last pump calibration.
Notes:
• The calibration of the pump is dependent on acidity range selected during SETUP.
• If an erroneous situation is encountered during the calibration, an error message is
displayed and the calibration can be restarted by pressing Restart.
• If the calibration doesn’t complete within 6 minutes the error message “Too much
standard” will be displayed and the calibration can be restarted by pressing Restart
after a new standard is prepared.

3130
Note: If the end-point is not reached or it is not recognized or the input reading is out of range,
an error message will be displayed. The titration can be restarted after a new sample is
prepared by pressing Restart.
TIPS FOR AN ACCURATE MEASUREMENT
• Calibrate the instrument in 8.30 pH buffer solution at least once a day, before you start to
perform measurements.
•
Purge the peristaltic pump to have the fresh titrant when starting a new calibration.
• Calibrate the peristaltic pump daily before performing a set of analyses.
• Clean the electrode in order to remove the possible coating from bulb.
• Precision of the measurement can be improved by using volumetric pipets for standard and
sample additions.
VIEW/DELETE TITRATOR RECORDED LOG DATA
Press MENU key while in Titrator main screen.
Press Recall to access the titrator recorded data.
The instrument will display a list of all the titration records stored in the titration log.
Use the ARROW keys to scroll the stored records list.
If the saved concentration was out of range the “!” symbol is displayed in front of the reading.
• From the titrator main screen press Titration. To enter titrator main screen from pH meter
mode press Titrator and then Titration. If the tutorial is enabled this screen will be shown.
•
Press Start to begin the titration process.
• After the titration is started two animations will be shown on the upper right side of the display
to indicate that the pump and the stirrer are running. On the lower right side of the display is
shown the period of time since the titration has been started.
• After the titration is complete, the concentration value is displayed in the selected unit.
• Press Unit to change the display unit.
• Press LOG to record the concentration value into the instrument’s memory.
A message will be displayed for a few seconds indicating the amount of the free log space. 50
log samples can be recorded in the instrument’s memory. When the titrator free log space is
under 12% the message will be shown permanently.
• If the concentration is out of limits an exceeded range limit message will be displayed blinking
and the message “Out of range” will be shown. Another titration can be initiated by pressing
Restart. Prepare a fresh sample and then press Restart.

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TITRATOR GLP INFORMATION
Press MENU while in Titration mode and then GLP.
From this screen it is possible to select between viewing the electrode GLP or the pump GLP.
Press GLP elec. to view the electrode’s last calibration parameters and date.
Press GLP pump to view the pump’s last calibration time and date.
If GLP elec. is pressed one of the next screens will be displayed.
GLP contains a set of information regarding electrode calibration. The following items are included
in electrode GLP: the time and date of the last calibration, offset, slope, electrode condition,
calibration timeout and the calibration buffers. The buffers displayed in video inverse mode are from
the previous calibration.
If a calibration hasn’t been performed the message “Not Calibrated” will be displayed.
If GLP pump is pressed, one of the next screens is displayed.
Press Delete to enter record deleting mode.
Press Delete All to enter all records deleting mode.
Press More to view more information.
Press Unit to convert the result to other unit.
Use the ARROW keys when is displayed to scroll between the log records.
Press ESC to return to the previous screen.
If Delete was pressed the instrument will ask for confirmation.
Use the ARROW keys to focus on the record to be deleted.
Press Confirm to delete the record or ESC to return to the previous screen.
Deleting a record will renumber the list of records.
If Delete All was pressed the instrument will ask for confirmation.
Press Confirm to delete all the records or ESC to return to the previous screen.
If the titrator log is empty the message “No Records!” will be displayed.

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Press LOG to memorize the current reading. A message indicating the free log space will be
displayed for a few seconds.
In order to take pH measurements follow the next steps:
• Submerge the pH bulb 2 cm (0,8’’) and the temperature probe into the sample to be tested
and stir gently. Allow time for the electrode to stabilize. When the reading becomes stable the
(unstable measurement) symbol will disappear.
• If the pH reading is less then -2.00 pH or greater then 16.00 pH the closest full-scale value
(-2.00 pH or 16.00 pH) will be displayed blinking.
If measurements are taken successively in different samples, it is recommended to rinse the
electrodes thoroughly with deionized water or distilled water and then with some of the next
sample to prevent cross-contamination.
The pH measurement is affected by temperature. In order to have accurate pH measurements, the
temperature effect must be compensated for. To use the Automatic Temperature Compensation
(ATC) feature, connect and submerge the HI 7662-M temperature probe into the sample in the
dedicated tubeguide and wait for a few seconds. The “ATC” message will be shown on the
display. Automatic Temperature Compensation will provide pH corrected values at the temperature
of measurements. If Manual Temperature Compensation (MTC) is desired, the temperature probe
must be disconnected from the instrument. The default temperature of 25
° C (77 ° F) or the last
temperature reading will be displayed preceded by the symbol and the “MTC” message.
The manually set temperature can now be adjusted with the ARROW keys (from -20.0 to 120.0
° C).
pH MEASUREMENT
The HI 84430 may be used as a pH meter for direct measurements.
Verify that the instrument has been calibrated before taking pH measurements. Set the instrument
to pH meter. At power up the instrument enters pH meter mode. From titrator mode press ESC
until pH units are displayed.
If an electrode calibration hasn’t been performed, or the number of days exceedes calibration time
out value set, the message “CAL DUE” will blink on the left side of the display (see Calibration
timeout option in Setup for details).
If CAL DUE is displayed perform an electrode calibration.
Place calibrated pH electrode into electrode holder. Open the fill hole.
Rinse the pH tip with distilled or deionized water. Immerse the pH electrode (bottom 2 cm / 0.8”)
in the sample and stir gently for a few seconds.
For a faster response and to avoid cross-contamination of the samples, rinse the electrode tip
with a few drops of the solution to be tested, before taking measurements. Press LOG to record
sample pH in instrument pH log.
Press MENU to access the instrument’s menu.
Press HELP to view the contextual help, every time you need supplementary information. The help
is customized for every situation that can appear during instrument usage.
Press STIR to start/stop the stirrer.
Press Titrator to enter titrator mode.
Press CAL to access the calibration menu.
The pump GLP displays the Time and Date of the last pump calibration.
If a calibration hasn’t been performed the message “Not Calibrated” will be displayed.

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pH METER GLP INFORMATION
The pH meter GLP screens references the last pH calibration data. GLP is an acronym for Good
Laboratory Practice.
To view this information, press MENU key then GLP.
A set of information regarding electrode calibration is displayed.
The following items are included in electrode GLP: the time and date of the last calibration, offset,
slope, electrode condition, calibration timeout and the calibration buffers. The buffers displayed in
video inverse mode are from the previous calibration.
If a calibration hasn’t been performed the message “Not Calibrated” will be displayed.
If Delete All was pressed the instrument will ask for confirmation.
Press Confirm to delete all records or ESC to return to the previous screen without deleting.
If the pH log is empty the message “No Records!” will be displayed.
VIEW/DELETE RECORDED pH DATA
To view or delete previously logged pH records press MENU key while in pH meter screen.
Press Recall to access the pH recall.
A list of records is stored in the pH log.
Use the ARROW keys to scroll the list of records.
Press More to see detailed information about the highlighted record.
Press Delete to enter record deleting mode.
Press Delete All to enter all records deleting mode.
If More is pressed a complete set of data is displayed.
Use ARROW keys when is displayed to scroll between the records.
If Delete was pressed the instrument will ask for confirmation.
Use the ARROW keys to focus on the record to be deleted.
Press Confirm to delete the record or ESC to return to the previous screen without deleting.
Deleting a record will renumber the list of records.

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TEMPERATURE CALIBRATION PROCEDURE (for technical personnel only)
All the instruments are factory calibrated for temperature.
HANNA’s temperature probes are interchangeable and no temperature calibration is needed when
they are replaced.
If the temperature measurements are inaccurate, temperature recalibration should be performed.
For an accurate recalibration, contact your dealer or the nearest HANNA Customer Service Center,
or follow the instructions below.
• Prepare a vessel containing ice and water and another one containing hot water (at a
temperature of around 50
° C). Place insulation material around the vessels to minimize
temperature changes.
• Use a calibrated thermometer with a resolution of 0.1 ° C as a reference.
• To enter user calibration screen press and hold down the ARROW keys simultaneously, then
power on the instrument. After a few seconds the User calibration screen is displayed.
• Press Temp function key to enter temperature calibration.
• Immerse the temperature probe in the vessel with ice and water as near as possible to the
reference thermometer. Allow a few seconds for the probe to stabilize.
• Use the ARROW keys to set the calibration point value to that of the ice and water measured
by the reference thermometer.
• The (unstable measurement) symbol will be shown on the display until the reading becomes
stable.
• When the reading is stable and close to the selected calibration point, the (unstable
measurement) symbol will disappear and the Confirm key will become active.
• Press Confirm to confirm the calibration point.
• The meter will be automatically move to the second calibration point, and will display 50 ° C for
the buffer value.
• Immerse the temperature probe in the second vessel as near as possible to the reference
thermometer. Allow a few seconds for the probe to stabilize.
• Use the ARROW keys to set the calibration point value to that of the hot water, measured by
the reference thermometer.
• The (unstable measurement) symbol will be shown on the display until the reading becomes stable.
• When the reading is stable and close to the selected calibration point, the (unstable
measurement) symbol will disappear and the Confirm key will become active.
• Press Confirm to confirm the calibration point. The instrument will return to the pH meter/
titrator main screen.
Note: If the reading is not close to the selected calibration point, the “Wrong” message will be
displayed. Change the temperature probe and restart the calibration.
If the temperature probe is disconnected or the measured temperature is out of the - 20 to120
° C range
the instrument will display “----”. The calibration point value can be changed using the ARROW keys.