Hanna-instruments HI 84429 Manual do Utilizador

1Instruction ManualHI 84429TITRATABLE ACIDITYMINITITRATOR & pH METERfor Dairy Productswww.hannainst.com

10KEYPAD FUNCTION AND INDICATORSESC - used to leave the current screen and to return either to the previous screen or to themain screen, depending on

111. Current time and instrument mode information (pH meter or Titrator)2. pH electrode condition information3. Main reading information4. Instrument

12PERISTALTIC PUMPPeristaltic pumps are self priming. Liquid never contacts the pump components. The titrant tubingis pressed along the rotating rolle

13Note: The milk sample size will change with these settings:Select Low Range for dairy products in the 0 to 15 °SH range. Select High Range for dair

14Use the ARROW keys in order to increase/decreasethe value.Press Accept to confirm or ESC to return to thesetup menu without saving the new value.pH

15Press / to highlight the value to be modified(year, month, day, hour, minute or second). Usethe ARROW keys to change the value.Press Accept to

16Press the corresponding function key to change theoption.If the new selected language cannot be loaded, thepreviously selected language will be relo

17Press Select to view the firmware version, languageversion, mV factory calibration date and time andtemperature factory calibration date and time.Pr

18ELECTRODE PREPARATIONPREPARATION PROCEDURERemove the electrode protective cap.DO NOT BE ALARMED IF ANY SALT DEPOSITS ARE PRESENT. This is normal wit

19ELECTRODE CALIBRATION PROCEDUREIt is recommended to calibrate the instrument frequently, especially if high accuracy is required.The pH range should

2All rights are reserved. Reproduction in whole or in part is prohibited without the written consentof the copyright owner, Hanna Instruments Inc., Wo

20THREE POINT CALIBRATION• From the pH meter/titrator calibration menu screen select the Electrode calibration option.The electrode calibration screen

21Notes:• A buffer confirmed during the calibration process is removed from the list of calibration buffersavailable for further calibration points.•

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

23The temperature has an effect on pH. The calibration buffer solutions are affected by temperaturechanges to a lesser degree than normal solutions. D

24PUMP TUBE INSTALLATIONTo mount the new peristaltic pump tube follow next steps:• Position one peristaltic pump fixing ring on its location.• Stretch

25Press CAL to access the titration calibration menu where electrode and pump calibration maybe accessed.Press HELP to view the contextual help.• Pres

26After the 5 minutes purging interval has elapsed the “Completed” message is displayed.Another purge period can be initiated by pressing Restart.PUMP

27• 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 an

28• After the pump calibration is complete a confirmation message is displayed for a few seconds,then the instrument will return to the titrator calib

29Verify: The instrument has been calibrated (pH and pump) before performing a titration. Anelectrode calibration in 8.30 pH buffer is recommended.• R

3Please examine this product carefully. Make sure that the instrument is not damaged. If anydamage occured during shipment, please notify your Dealer.

30• From the titrator main screen press Titration. To enter titrator main screen from pH metermode press Titrator and then Continue.• Press Start to b

31• If the concentration is out of limits (15 SH for Low Range, 10 or 75 SH for High Range - seepage 6 for range limits) the exceeded range limit wil

32The 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

33GLP contains a set of information regarding electrode calibration. The following items areincluded in electrode GLP: the time and date of the last c

34If GLP pump is pressed, one of the next screens is displayed.If a calibration hasn’t been performed the message “Not Calibrated” will be displayed.T

35Press LOG to memorize the current reading. A message indicating the free log space will bedisplayed for a few seconds.Up to 50 log samples can be s

36Press CFM to delete the record or ESC to return to the previous screen without deleting.Deleting a record will reorganize the list of records.VIEW/D

37If the pH log is empty the message “No Records!” will be displayed.pH METER GLP INFORMATIONThe following items are included in electrode GLP: the ti

38TEMPERATURE CALIBRATION PROCEDURE (for technical personnel only)All the instruments are factory calibrated for temperature.HANNA’s temperature probe

39• Immerse the temperature probe in the second vessel as near as possible to the referencethermometer. Allow a few seconds for the probe to stabilize

4The HI 84429 is an easy to use microprocessor-based automatic minititrator and pH meter designedfor the rapid and accurate analysis of Total Titratab

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42REFERENCE ELECTRODE CLEANING• Drain the old filling solution, rinse with an adequate HI 7072 solution, drain, then refill with HI 7072 solution.• Do

43HI 84429 is warranted for two years against defects in workmanship and materials when used for itsintended purpose and maintained according to the i

44Printed in EUROPE(ROMANIA)Hanna Instruments Inc.Highland Industrial Park584 Park East DriveWoonsocket, RI 02895 USATechnical Support for CustomersTe

5Titratable acidity measures the total titratable acidity and differs from pH as it also includes thebuffering capacity of the milk constituents. Titr

6SPECIFICATIONSTitrator 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

7Temperature Range -20.0 to 120.0 °C (-4.0 to 248.0 °F)Resolution 0.1 °CAccuracy ±0.4 °C without probe errorREQUIRED REAGENTSCode Description Quantit

8PRINCIPLE OF OPERATIONA neutralization titration is one where an acid and base react to form a neutral pH solution.

9FUNCTIONAL DESCRIPTIONREAR PANEL6. pH Electrode 10. Power adapter connector 14. Power switch7. Temperature probe 11. Reference electrode socket 15. P