Hanna Instruments HI 84429 Instruction Manual
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Hanna Instruments HI 84429 Instruction Manual

Hanna Instruments HI 84429 Instruction Manual

Titratable acidity minititrator & ph meter for dairy products
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99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com
Instruction Manual
HI 84429
TITRATABLE ACIDITY
MINITITRATOR & pH METER
for Dairy Products
1

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  • Page 1 99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.TestEquipmentDepot.com Instruction Manual HI 84429 TITRATABLE ACIDITY MINITITRATOR & pH METER for Dairy Products...

  • Page 2: Table Of Contents

    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. TABLE OF CONTENTS PRELIMINARY EXAMINATION....................3 GENERAL DESCRIPTION ......................4 SPECIFICATIONS ........................

  • Page 3: Preliminary Examination

    Please examine this product carefully. Make sure that the instrument is not damaged. If any damage occured during shipment, please notify your Dealer. Each HI 84429 minititrator is supplied complete with: • FC 260B pH electrode • HI 5315 Reference electrode •...

  • Page 4: General Description

    By simply pressing the Start key, the HI 84429 automatically starts pump operation and titrates the sample to the end point. The HI 84429 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.
  • Page 5 Titratable acidity measures the total titratable acidity and differs from pH as it also includes the buffering capacity of the milk constituents. Titratable acidity in dairy products, is determined by titrating a sample with sodium hydroxide to a fixed endpoint pH (pH 7.00 or a phenolphtalein endpoint of pH 8.30).

  • Page 6: Specifications

    SPECIFICATIONS Titrator Range Titratable acidity (low range) °SH: 0.0 to 15.0 °SH °Th: 0 to 40 °Th °D: 0 to 35 °D %I.a.: 0.00 to 0.35 %I.a. Titratable acidity (high range) °SH: 10.0 to 75.0 °SH °Th: 20 to 200 °Th °D: 20 to 175 °D %I.a.: 0.0 to 2.0 %I.a.
  • Page 7 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.) REQUIRED REAGENTS Code Description Quantity/Test HI 84429-50 Titrant 0.5 mL HI 84429-55 Standard 50 mL...

  • Page 8: Principle Of Operation

    (phenolphthalein) is utilized in an opaque or colored sample. Calculations are then required. The entire procedure can be quite time consuming. Titratable Acidity in dairy products, as performed on the HI 84429 minititrator, utilizes a simple sample preparation, a high quality peristaltic dosing pump for titrant, potentiometric endpoint detector and instantaneaous computations.

  • Page 9: Functional Description

    FUNCTIONAL DESCRIPTION FRONT PANEL 1. Titrant bottle 3. Keypad 5. Peristaltic pump tubes 2. Graphic LCD 4. Electrode holder REAR PANEL 6. pH Electrode 10. Power adapter connector 14. Power switch 7. Temperature probe 11. Reference electrode socket 15. Peristaltic pump 8.
  • Page 10 KEYPAD FUNCTION AND INDICATORS - used to leave the current screen and to return either to the previous screen or to the main screen, depending on the context, while pressed in SETUP the new value of the set parameter is not changed. - used to modify a parameter’s value, to scroll the information displayed while viewing a help or to move between the options from the instrument’s SETUP HELP...
  • Page 11 GUIDE TO INCDICATORS During the instrument’s operation a set of information are displayed on the LCD. Displayed icons: Pump activity. Unstable reading. Parameter can be changed. Stirrer on. 1. Current time and instrument mode information (pH meter or Titrator) 2. pH electrode condition information 3.

  • Page 12: Titrator Startup

    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 drawing titrant along and out the titrator tip. TITRATOR STARTUP •...

  • Page 13: Setup Configuration Menu

    SETUP CONFIGURATION MENU 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.
  • Page 14 Calibration timeout Option: 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. Use the ARROW keys in order to increase/decrease the value.
  • Page 15 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 Option: 0 to 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 value.
  • Page 16 Time format Option: AM/PM or 24 hours. Press the functional key to select the new value. Date format Press Modify to change the Date Format. Use the ARROW keys to select the desired format. Press Accept to confirm the value or ESC to return to the setup menu.
  • Page 17 Beep On 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.

  • Page 18: Electrode Preparation

    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 water. During transport tiny bubbles of air may have formed inside the glass bulb. The electrode cannot function properly under these conditions.

  • Page 19: Electrode Calibration Procedure

    8.30 pH. For a single point calibration any of the three buffers may be used, but using 8.30 pH is advised. Note: The HI 84429 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.
  • Page 20 THREE POINT CALIBRATION • From the pH meter/titrator calibration menu screen select the Electrode calibration option. The electrode calibration screen will be displayed. • The 6.00 buffer will be selected by default. If necessary press the ARROW keys in order to select a different buffer value.
  • Page 21 • When the reading is stable and close to the selected buffer, the (unstable measurement) symbol will disappear and the CFM key will become active. • Press CFM to confirm the calibration. • The calibrated value will be shown on the display and the third expected buffer value will be automatically selected.
  • Page 22 • 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. •...

  • Page 23: Ph Buffer Temperature Dependence

    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.

  • Page 24: Pump Tube Installation

    PUMP TUBE INSTALLATION To mount the new peristaltic pump tube follow next steps: • Position one peristaltic pump fixing ring on its location. • Stretch the tube over the peristaltic pump cylinders. • Fix the second pump fixing ring on its location. •...
  • Page 25 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.

  • Page 26: Pump Calibration Procedure

    Verify: The electrode has been calibrated in 8.30 pH buffer. • Sample preparation: Fill a beaker up to the 50 mL mark with HI 84429-55 Standard. Place the stir bar into the beaker and then place the beaker in the appropiate place on the instrument top.
  • Page 27 • 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. • Press Pump. The next screen will be displayed. •...
  • Page 28 • 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 independent of the selected range and concentration unit. •...

  • Page 29: Titration Procedure

    TITRATION PROCEDURE Verify: The instrument has been calibrated (pH and pump) before performing a titration. An electrode calibration in 8.30 pH buffer is recommended. • Refer to Setup Configuration Menu (see page 13) to set up instrument for your measurement. •...
  • Page 30 • From the titrator main screen press Titration. To enter titrator main screen from pH meter mode press Titrator and then Continue. • Press Start to begin the titration process. • After the titration 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 running.
  • Page 31 • If the concentration is out of limits (15 SH for Low Range, 10 or 75 SH for High Range - see page 6 for range limits) the exceeded range limit will be displayed blinking and the message “Out of range” will be shown. Another titration can be initiated by pressing Restart. Note: If the end-point is not reached or it is not recognized or the input reading is out of 3.00 to 8.30 pH range, an error message will be displayed.
  • Page 32 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. Press Delete to enter record deleting mode.
  • Page 33 If the titrator log is empty the message “No Records!” will be displayed. 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.

  • Page 34: Ph Measurement

    If a calibration hasn’t been performed the message “Not Calibrated” will be displayed. pH MEASUREMENT The HI 84429 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.
  • Page 35 Press LOG to memorize the current reading. A message indicating the free log space will be displayed for a few seconds. Up to 50 log samples can be saved into the instrument’s memory. When the free pH log space is under 12% a message will be permanently shown on the display, indicating the remaining free log space.
  • Page 36 VIEW/DELETE pH MEMORIZED SAMPLES 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 focused record. Press Delete to enter record deleting mode.
  • Page 37 If Delete All was pressed the instrument will ask for confirmation. Press CFM 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. pH METER GLP INFORMATION The pH meter GLP information refers to the pH calibration date.

  • Page 38: Temperature Calibration Procedure (For Technical Personnel Only)

    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 bellow.
  • Page 39 • 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.

  • Page 40: Troubleshooting Guide

    TROUBLESHOOTING GUIDE r t c i s s l o f . t f r t c r t c l l i l o r r t c l l i l i f r t c l l i r t c l l i l l i...

  • Page 41: Electrode Conditioning & Maintenance

    r t i ° T ° ° ) t i E " " x i s r ELECTRODE CONDITIONING AND MAINTENANCE STORAGE PROCEDURE To assure a quick response time, the glass bulb should be kept moist and not allowed to dry out. Replace the solution in the protective cap with a few drops of HI 70300 or HI 80300 Storage Solution.

  • Page 42: Accessories

    HI 84429-50 Titrant solution 100 ml HI 84429-55 Pump Calibration Standard (500 mL) pH CALIBRATION SOLUTIONS HI 84429-65 pH 4.01 Buffer Solution (6 pcs×230 mL) HI 84429-70 pH 6.00 Buffer Solution (6 pcs×230 mL) HI 84429-60 pH 8.30 Buffer Solution (6 pcs×230 mL)

  • Page 43: Warranty

    WARRANTY HI 84429 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. Damage due to accident, misuse, tampering or lack of prescribed maintenance is not covered.

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