Hanna Instruments HI 84432 Instruction Manual
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Hanna Instruments HI 84432 Instruction Manual

Hanna Instruments HI 84432 Instruction Manual

Titratable acidity minititrator & ph meter for fruit juices
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Instruction Manual
HI 84432
TITRATABLE ACIDITY
MINITITRATOR & pH METER
for Fruit Juices
1

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Summary of Contents for Hanna Instruments HI 84432

  • Page 1 Instruction Manual HI 84432 TITRATABLE ACIDITY MINITITRATOR & pH METER for Fruit Juices...
  • Page 2 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 tech@hannainst.com. This instrument is in compliance with directives.

  • Page 3: Table Of Contents

    ELECTRODE CONDITIONING & MAINTENANCE ..............41 ACCESSORIES ........................42 WARRANTY ........................43 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.

  • Page 4: Preliminary Examination

    PRELIMINARY EXAMINATION 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 84432 minititrator is supplied complete with: • HI 1131B pH electrode HI 7662-M Temperature probe •...
  • Page 5 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) •...

  • Page 6: Specifications

    SPECIFICATIONS Titrator Range Titratable acidity: g/100 mL as citric acid : 0.20 - 8.00% CA g/100 mL as tartric acid : 0.23 - 9.30% TA g/100 mL as malic acid : 0.21 - 8.30% MA Resolution Titratable acidity: 0.01% Accuracy 5% of reading ±...

  • Page 7: Principle Of Operation

    PRINCIPLE OF OPERATION Fruit juice acidity is determined by neutralization of the all available hydrogen ions present in the sample, with a strong base solution: In an ideal solution, the end point of an acid titration corresponds stoichiometrically to the complete neutralization of the acids present.

  • Page 8: Functional And Physical Description

    FUNCTIONAL AND PHYSICAL DESCRIPTION OVERHEAD VIEW OVERHEAD VIEW OVERHEAD VIEW OVERHEAD 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 VIEW FRONT VIEW FRONT VIEW...
  • Page 9 KEYPAD FUNCTION AND INDICATORS - 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...

  • Page 10: Titrator Startup

    5. Functional key area 6. Indicates that the displayed value can be changed using ARROW keys 7. Temperature value (Manual or Automatic) 8. pH temperature compensation mode (Manual or Automatic) 9. Stirrer and reading status area 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.

  • Page 11: 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 12 Temperature unit Options: °C, °F. Press the function key in order to change the temperature unit. Backlight Options: 0 to 8. Press Modify to access the backlight level. 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.
  • Page 13 Date / Time This option is used to set the instrument’s date and time. Press Modify to change the date/time. Press to highlight the value to be modified (year, month, day, hour, minute or second). Use the ARROW keys to change the value.
  • Page 14 Language 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.

  • Page 15: Electrode Preparation

    Baud rate 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. 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...

  • Page 16: Electrode Calibration Procedure

    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 aggresive chemicals and after electrode is cleaned d) When high accuracy is required e) If the pH calibration expired warning is displayed during measurement.
  • Page 17 • 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. •...
  • Page 18 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. •...
  • Page 19 • 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 20: 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 21: 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 rollers. • Fix the second pump fixing ring on its location. •...
  • Page 22 • 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 23: Pump Calibration Procedure

    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 Please set up the instrument before performing the pump calibration. The calibration of the pump must be performed each time the pump tube, the reagent bottle or the pH electrode is changed.
  • Page 24 • 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 25 • 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 concentration unit selected during SETUP. •...

  • Page 26: Titration Procedure

    TITRATION PROCEDURE Verify: The instrument has been calibrated (pH and pump) before performing a lot of titrations. An electrode calibration in at least one point (8.20 pH buffer) is recommended. Sample preparation: Add to a clean beaker 2 mL fruit juice precisely measured and fill the beaker up to 50 mL with distilled water.
  • Page 27 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. Unit to change the display unit. A message will be displayed for a few seconds indicating the amount of the free log space. is under 12% the message will be shown permanently.
  • Page 28 • 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. 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.
  • Page 29 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. Press Delete All to enter all records deleting mode. Press More to view more information.
  • Page 30 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 31: Ph Measurement

    If GLP pump is pressed, one of the next screens is displayed. 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. pH MEASUREMENT The HI 84432 may be used as a pH meter for direct measurements.
  • Page 32 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. Press LOG to memorize the current reading.
  • Page 33 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”...
  • Page 34 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 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 screens references the last pH calibration data.

  • Page 35: 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 below.
  • Page 36 • 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 37: Pc Interface

    USB socket and the other to the USB port of your PC. If you are not using Hanna Instruments HI 92000 software, please see the following instructions. SENDING COMMANDS FROM PC It is also possible to remotely control the instrument with any terminal program.
  • Page 38 Requests the instrument model name and firmware code (20 chars). Requests the calibration data record. The answer string contains: -GLP status (1 char): represents a 4 bit hexadecimal encoding. -0x1-pH calibration available -0x2- pump calibration available -pump calibration data (if available): -calibration time, yymmddhhmmss (12 chars) -pH calibration data (if available): -the number of calibrated buffers (1 char)
  • Page 39 1-MM/DD/YYYY 2-YYYY/MM/DD 3-YYYY-MM-DD 4-Mon DD, YYYY 5-DD-Mon-YYYY 6-YYYY-Mon-DD -Language name (3 chars, “sfm” when the instrument is in safe mode) -Checksum (2 chars) NSLx Requests the number of logged samples (4 chars). The command parameter (1 char): -P-request for pH meter -T-request for titrator LODPxxx Requests the xxxth pH record logged data LODTxxx Requests the xxxth titrator record logged data...

  • Page 40: Troubleshooting Guide

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

  • Page 41: Electrode Conditioning & Maintenance

    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

    ACCESSORIES REAGENTS HI 84432-50 Titrant solution (100mL) HI 84432-55 Pump calibration solution (100mL) HI 84432-70 Reagents kit (about 150 titrations) pH CALIBRATION SOLUTIONS HI 7004M Buffer solution pH 4.01 (230mL) HI 7007M Buffer solution pH 7.01 (230mL) HI 84102- 61 Buffer solution pH 8.20 ELECTRODES HI 1131B...

  • Page 43: Warranty

    If the repair is not covered by the warranty, you will be notified of the charges incurred. If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization Number from the Customer Service Department and then send it with shipment costs prepaid. When shipping any instrument, make sure it is properly packaged for complete protection.
  • Page 44 SALES AND TECHNICAL SERVICE CONTACTS SALES AND TECHNICAL SERVICE CONTACTS SALES AND TECHNICAL SERVICE CONTACTS SALES AND TECHNICAL SERVICE CONTACTS SALES AND TECHNICAL SERVICE CONTACTS Australia: Tel. (03) 9769.0666 • Fax (03) 9769.0699 China: Tel. (10) 88570068 • Fax (10) 88570060 Egypt: Tel.

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