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Summary of Contents for Hanna Instruments HI84534
- Page 1 HI84534 Titratable Acidity Minititrator & pH Meter For Vinegar...
- Page 2 If you need additional technical information, do not hesitate to e‑mail us at tech@hannainst.com or view our worldwide contact list at www.hannainst.com. All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Hanna Instruments Inc., Woonsocket, Rhode Island, 02895, USA.
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Page 3: Table Of Contents
TABLE OF CONTENTS 1. PRELIMINARY EXAMINATION ....................5 2. GENERAL DESCRIPTION & INTENDED USE ................6 2.1. PRINCIPLE OF OPERATION ..................6 2.2. SIGNIFICANCE OF USE ....................7 3. SPECIFICATIONS ......................... 8 4. FUNCTIONAL DESCRIPTION ....................10 4.1. OVERHEAD VIEW ....................10 4.2. - Page 4 8. PUMP CALIBRATION ......................25 8.1. PREPARATION ......................25 8.2. PROCEDURE ......................25 8.3. ERRORS AND WARNING MESSAGES ................26 9. TITRATION ........................27 9.1. SAMPLE PREPARATION .................... 27 9.2. PROCEDURE ......................27 9.3. ERRORS AND WARNING MESSAGES ................29 10.
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Page 5: Preliminary Examination
1. PRELIMINARY EXAMINATION Remove the meter from the packing material and examine it carefully. For further assistance, please contact your local Hanna Instruments Office or email us at tech@hannainst.com. Each HI84534 is supplied with: • HI84534-70 Reagent kit for titratable acidity in vinegar •... -
Page 6: General Description & Intended Use
2. GENERAL DESCRIPTION & INTENDED USE HI84534 is a low-cost, easy to use automatic minititrator and pH meter designed for the rapid and accurate analysis of Total Titratable Acidity in Vinegar. The HI84534 minititrator is a valuable tool because of its ability to eliminate subjective factors including color indicators, errors in mathematical calculations or erratic titrant additions, it will quickly become a valuable acidity analysis tool of vinegar. -
Page 7: Significance Of Use
The titratable acidity of vinegar is determined by titrating the sample with a strong base to a fixed pH. The end point is determined by the potentiometric input and the results are typically expressed as % (g/100mL) or g/L acetic acid. The HI84534 minititrator method is based on the Official Methods of Analysis of AOAC International. -
Page 8: Specifications
3. SPECIFICATIONS 0.3 to 10.0 % w/v (g/100mL) as acetic acid Range 3 to 100 g/L as acetic acid Resolution 0.1%, 1g/L 3% of reading or ± 0.1 % , whichever is greater Accuracy 3% of reading or ± 1 g/L, whichever is greater Sample 1 mL volume... - Page 9 235 x 200 x 150 mm (9.2 x 7.9 x 5.9”) Weight 1.9 kg (67.0 oz.) Environment 0 to 50 °C (32 to 122 °F); max 95% RH non-condensing REQUIRED REAGENTS Code Description HI84534 - 50 Titratable acidity titrant HI84534 - 55 Titratable acidity calibration standard...
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Page 10: Functional Description
4. FUNCTIONAL DESCRIPTION 4.1. OVERHEAD VIEW 1. Titrant bottle 2. Liquid Crystal Display (LCD) 3. Keypad 4. Electrode holder HI84534 VINEGAR TITRATABLE ACIDITY 5. Dispensing tube HELP MENU STIR 4.2. REAR VIEW 6. Temperature probe 7. pH electrode 8. Electrode holder 9. -
Page 11: Keypad Description
4.3. KEYPAD DESCRIPTION HI84534 VINEGAR TITRATABLE ACIDITY HELP MENU STIR – used to leave the current screen and to return either to the previous screen or to the main screen. In Setup, exits a parameter without changing the value. – used to modify the parameters’ values, to scroll the information displayed while viewing ... -
Page 12: Lcd Description
4.4. LCD DESCRIPTION During the instrument’s operation information is displayed on the LCD. 1. Current time and instrument mode, titrator or pH meter 2. pH electrode condition 3. Instrument status 4. Virtual option keys 5. Stirrer and reading status Stirrer on Stirrer is not working properly Pump running Unstable reading... -
Page 13: Titrator Setup
5. TITRATOR SETUP 5.1. ELECTRODE 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/deionized water. During transport, tiny bubbles of air may have formed inside the glass bulb. The electrode cannot function properly under these conditions. -
Page 14: Dosing Pump
5.2. DOSING PUMP Installation To install the dosing pump follow the procedure below: • Extend the plunger on the 5 mL syringe to its maximum volume. • Place the syringe in the dedicated spot on the top of the meter (1). •... - Page 15 Prime Procedure Prime cycle should be performed: • if you notice there is no titrant in the tip • whenever the dosing system tubes are replaced • whenever a new bottle of titrant is used • before starting a pump calibration •...
- Page 16 • From titration mode, press Prime to prime the burette. • Use the / keys to select the number of rinses and then press Start. A minimum of 3 rinses is recommended to ensure all of the air bubbles have been removed. •...
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Page 17: Setup Menu
6. SETUP MENU The titrator’s setup menu may be accessed from the titrator or pH/mV meter 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 / keys permit the user to scroll the setup parameters. -
Page 18: Temperature Unit
6.4. TEMPERATURE UNIT Option: °C, °F, K Press the virtual option key to select the temperature unit. 6.5. TIME Press the Modify key to change the time and time format. Press Format to switch between 12 hour (am/pm) and 24 hour mode. Press to highlight the value to be modified. Use the / keys to change the value. -
Page 19: Error Beep
6.8. ERROR BEEP Option: Enable or Disable Press the virtual option key to select the option. If enabled, a beep will be heard when an error occurs. 6.9. DECIMAL SEPARATOR Option: Dot (.) or Comma (,) Press the virtual option key to select the decimal separator. The decimal separator is used on the measurement screen and CSV files. -
Page 20: Language
6.12. LANGUAGE Press the virtual option key to change the language. If the 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 “safe mode”. In “safe mode” all messages are displayed in English and tutorial and help information are not available. -
Page 21: Electrode Calibration
10.01 pH. For a single point calibration 8.20 pH is recommended, however any of the buffers may be used. Note: The HI84534 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 22: Calibration Procedure
7.2. CALIBRATION PROCEDURE One-Point Calibration • The 8.20 buffer will be selected by default. If necessary, press the / keys to select a different buffer value. • The symbol will be shown on the display until the reading becomes stable. •... -
Page 23: Error And Warning Messages
• Press Confirm to confirm the calibration point. 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 the ESC. The calibrated value will be shown on the display and the second expected buffer value will be displayed. - Page 24 • 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. •...
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Page 25: Pump Calibration
• Verify the electrode has been calibrated in 8.20 pH buffer. • Ensure the pump is primed with HI84534-50 titratable acidity titrant. 8.1. PREPARATION • Use a clean pipette to add exactly 2 mL of HI84534-55 calibration standard to a clean beaker. -
Page 26: Errors And Warning Messages
• Rinse the pH electrode with deionized water and immerse into the calibration solution until the reference junction is completely submerged. Be sure that the tip of the electrode is not hitting the stir bar. If necessary, additional distilled or deionized water can be added. •... -
Page 27: Titration
9. TITRATION The instructions listed below should be followed carefully to ensure measurements are conducted with the highest possible accuracy and precision. • Ensure the pump and electrode have been calibrated. • The dosing tip is immersed in the sample (approximately 0.25 cm / 0.1") •... - Page 28 • The instrument will continuously update the concentration on the display. The value will be displayed blinking. When the reading is under range “----” symbol appears blinking. • The titration curve can be viewed during a titration by pressing Plot ON. Press Plot OFF to return to the titration screen.
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Page 29: Errors And Warning Messages
9.3. ERRORS AND WARNING MESSAGES • If the concentration exceeds the range limits, the maximum concentration will be displayed blinking and the message "Max. vol exceeded". Another titration can be started by pressing Restart. • If the pH or temperature reading exceeds the specified limits, the message "Wrong input" will be displayed and the pH or temperature reading will blink. -
Page 30: Ph Measurement
10. pH MEASUREMENT HI84534 can be used as a pH meter for direct measurements. Verify that the instrument has been calibrated before taking pH measurements. From titrator mode press Meter. If an electrode calibration hasn’t been performed, or the number of days exceeds the calibration time out value set, the message “CAL DUE”... -
Page 31: Logging
11. LOGGING Press the Menu key then Recall to access the log history. When an external USB storage device is connected, the Export key is displayed. It saves the meter and titrator logs in two text format files on the storage device. Press Meter or Titrator to view the respective logs. -
Page 32: Meter
Press Plot to view the titration curve or the ESC key to return to the previous screen. On the titration curve, the end point volume and pH are displayed. The titration data (Total Titrant Volume on the x-axis and pH on the y-axis) can be scanned through with the dotted line by using the / keys. To zoom the titration curve press Zoom. -
Page 33: Pc Interface And Data Transfer
Press the ESC key to return to the previous screen. If Delete or Del.All is pressed the instrument will ask for confirmation. Press Yes to delete the record or No to return to the previous screen without deleting. Deleting a single record will renumber the list of records. -
Page 34: Titrator Glp Information
12. TITRATOR GLP INFORMATION Press Menu then GLP. From this screen it is possible to select Electrode or the Pump. 12.1. PUMP Press Pump to view the pump’s last calibration time, date and slope. If a calibration hasn’t been performed, the message “Not Calibrated” will be displayed. 12.2. -
Page 35: Troubleshooting Guide
13. TROUBLESHOOTING GUIDE SYMPTOMS PROBLEM SOLUTION Slow response/excessive Dirty pH electrode. Refill with fresh fill solution. drift. Soak the electrode tip in HI7061 cleaning solution for 30 minutes. Reading fluctuates up Clogged/dirty junction. Refill with fresh fill solution. and down (noise). Low electrolyte level Soak the electrode tip in HI7061... - Page 36 SYMPTOMS PROBLEM SOLUTION After a titration, the Broken electrode. Check/clean the electrodes. instrument displays Instrument not Recalibrate the instrument (pump 10.0% AA or 100 g/L AA calibrated. Wrong and pH). Use care during sample with the selected unit sample. Concentration preparation.
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Page 37: Accessories
14. ACCESSORIES REAGENTS HI84534-50 Titratable acidity titrant (120 mL) HI84534-55 Titratable acidity calibration standard (120 mL) pH CALIBRATION SOLUTIONS HI7004M Buffer solution pH 4.01 (230 mL) HI7007M Buffer solution pH 7.01 (230 mL) HI70082M Buffer solution pH 8.20 (230 mL) HI7010M Buffer solution pH 10.01 (230 mL) -
Page 38: Certification
If service is required, contact your local Hanna Instruments Office. If under warranty, report the model number, date of purchase, serial number (see engraved on the back of the meter) and the nature of the problem. - Page 39 Hanna Instruments reserves the right to modify the design, construction or appearance of its products without advance notice.
- Page 40 World Headquarters Hanna Instruments Inc. Highland Industrial Park 584 Park East Drive Woonsocket, RI 02895 USA www.hannainst.com MAN84534 Printed in ROMANIA...
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