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pH MEASUREMENT

The

HI 84502

can 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

. From titrator mode press

Meter

until pH units are displayed.

If an electrode calibration hasn’t been performed, or the number of days exceeds the 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).

CAL DUE

is displayed perform an electrode calibration.

Press

to access the instrument’s menu.

Press

HELP

to view the contextual help, every time you need additional information.

Press

STIR

to start/stop the stirrer.

Press

Titrator

to enter titration mode.

Press

CAL

to access the calibration menu.

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.

Содержание HI 84502

Страница 1: ...1 Instruction Manual HI 84502 TITRABLE TOTAL ACIDITY MINITITRATOR for wine analysis www hannainst com ...

Страница 2: ...duct This manual will provide you with the necessary information for the correct use of the instrument Please read it carefully before using the instrument If you need additional technical information do not hesitate to e mail us at tech hannainst com ...

Страница 3: ... PRINCIPLE OF OPERATION 8 FUNCTIONAL DESCRIPTION 9 TITRATOR STARTUP 11 SETUP MENU 12 GUIDE TO DISPLAY CODES 16 ELECTRODE PREPARATION 18 ELECTRODE CALIBRATION PROCEDURE 19 pH BUFFER TEMPERATURE DEPENDENCE 23 DOSING PUMP INSTALLATION 24 DOSING PUMP PRIME PROCEDURE 24 PUMP CALIBRATION PROCEDURE 26 TITRATION PROCEDURE 28 pH MEASUREMENT 33 PC INTERFACE AND DATA TRANSFER 37 TROUBLESHOOTING GUIDE 38 ELEC...

Страница 4: ...robe HI 7082 Electrode Fill Solution 30 mL 2000 µL automatic pipette with two plastic tips Two 100 mL beakers Tube set aspiration tube with titrant bottle cap and dispensing tube with tip Dosing Pump Valve 5 mL Syringe 1 mL Plastic Pipette Stir bar Power Adapter Two sachets of cleaning solution for wine deposits Two sachets of cleaning solution for wine stains Instruction manual Note Save all pack...

Страница 5: ...tive user interface By simply pressing the Start key in Titrator mode the instrument will automatically titrate the sample to the end point The current pH and temperature are continuously displayed during titration process The result is immediately displayed in g L then the instrument is ready for another titration by pressing the Restart key A dedicated HELP key aids in setup calibration status a...

Страница 6: ...e acid in wine is acetic acid which when present in more than a nominal amount gives wine a sour or vinegary aspect Total acidity also called titratable acidity is the sum of the fixed and volatile acids In the United States the total acidity is usually expressed in terms of tartaric acid even though the other acids are measured Total Acidity directly effects the color and flavor of wine and depen...

Страница 7: ...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 4 available buffers 4 01 7 01 8 20 10 01 Temperature Manual or automatic Compensation mV meter mV meter 2000 0 to 2000 0 mV mV Resolution 0 1 mV mV Accuracy 1 0 mV Log data Up to 200 samples pH or mV Temperature Range 20 0 to 120 0 C 4 0 to 248 0 F Resolution 0 1 C Accuracy 0 4 C without probe e...

Страница 8: ...centration The dosing pump reproducibility is independent of the titrant tubing therefore it doesn t need frequent calibrations The calibration of the pump is necessary in order to have high accuracy for the titrations The calibration procedure is based on the analysis of a known solution By doing this the instrument makes a differential analysis between the standard and the wine sample The miniti...

Страница 9: ...ector PC interface 13 USB connector Storage interface 14 Temperature connector 15 BNC electrode connector 16 Reference connector 17 Titrant bottle 18 Syringe 19 Aspiration tube 20 Dosing Pump Valve FUNCTIONAL DESCRIPTION OVERHEAD VIEW 1 Titrant bottle 2 Liquid Crystal Display LCD 3 Keypad 4 Electrode holder 5 Dispensing tube ...

Страница 10: ...OG used to save the current mV pH reading in pH meter mode and the titration result MENU used to enter Setup Recall or GLP selection menu while instrument is in pH or Titration mode STIR used to start stop the stirrer Note The stirrer starts automatically during pump calibration and titration it cannot be stopped by pressing STIR key GUIDE TO INDICATORS During the instrument s operation informatio...

Страница 11: ...e 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 Menu section for details Connect the pH electrode to the instrument Connect the temperature sensor to the instrument Calibrate the pH electrode Connect the tubes and the valve See the Dosing Pump Installation section for the procedure Remove the ...

Страница 12: ... Range Setup Use Low measurement range for 0 1 5 0 g L Use High measurement range for 4 0 25 0 g L To ensure a high accuracy it is recommended to recalibrate the pump after the valve titrant or electrode has been changed Use the ARROW keys to select the value Press Select to confirm or ESC to return to the setup menu without saving the changes Calibration Timeout Disabled or 1 to 7 days This optio...

Страница 13: ... Press Accept to confirm the new value or ESC to return to the setup Date Press the Modify key to change the date and date format Press Format to cycle between the available date formats Press to highlight the value to be modified digit by digit Use the ARROW keys to change the value Press Accept to confirm the new value or ESC to return to the setup Key Beep Select Enable to activate or Disable t...

Страница 14: ...separator This option is used to set the display s contrast Press Modify to change the display s contrast The default value is 8 Use the ARROW keys or to increase decrease the value Press Accept to confirm the value or ESC to return to the setup menu LCD Backlight Use the ARROW keys or to increase decrease the backlight level Press Accept to confirm or ESC to return to the setup menu Press Modify ...

Страница 15: ... are not available Language Press Select to view the firmware version language version mV factory calibration date and time and temperature factory calibration date and time Meter Information Tutorial Restore Factory Settings Enable or Disable the Tutorial This helpful tool offers additional information during calibration and titration Press ESC to return to the setup menu Press Select to restore ...

Страница 16: ...IDE TO DISPLAY CODES Titration screen when a titration is in progress Titration screen display This screen appears when the instrument is turned on during the initialization process Prime burette screen Prime burette screen when the dosing system is running PUMP CALIBRATION MESSAGES Pump calibration is initiated by pressing the Start key ...

Страница 17: ...s 2 00 pH 16 00 pH CALIBRATION MESSAGES pH calibration mode When the reading has stabilized press Confirm to accept the calibration or Clear to restore the default calibration The Wrong Buffer message is displayed when the pH value is outside of the acceptable range Clean the electrode by following the Cleaning Procedure and or check the buffer concentration before continuing the pH calibration Pr...

Страница 18: ...k the electrode in HI 70300 Storage Solution for at least one hour TITRATION MESSAGES This screen is displayed when the instrument is in titration mode Press Start to begin a titration Meter to enter pH meter mode or Prime to enter into the prime function The titration result expressed as concentration of tartaric acid in g L ppt is displayed automatically at the end of the titration Press the Res...

Страница 19: ... 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 the beaker that will be used for calibration Remove the protective cap and rinse the electrode with some of the ...

Страница 20: ...ter the first calibration point has been confirmed press ESC to exit without performing the second calibration point 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 beaker with calibration buffer in the beaker holder Rinse the electrod...

Страница 21: ... electrodes on the top of the beaker and secure it by turning clockwise and press STIR 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 ac...

Страница 22: ...the Wrong Old Slope error message is displayed an inconsistency exists between the current and the previous old calibration Clear the previous calibration by pressing Clear and proceed with calibration from the current calibration point The instrument will keep all the confirmed values during the current calibration If the temperature reading is out of the defined temperature range of the buffer 0...

Страница 23: ... 0 7 1 3 8 8 1 0 1 5 1 9 5 0 0 4 4 0 7 7 2 8 2 1 0 1 0 2 8 6 0 0 4 3 0 7 3 2 8 6 0 0 1 5 2 7 7 1 0 4 1 0 7 0 2 8 1 0 0 1 0 3 6 8 2 0 4 0 0 7 7 1 8 6 9 9 5 3 5 9 3 0 4 9 9 6 4 1 8 2 9 9 0 4 4 0 1 4 0 4 8 9 6 1 1 8 8 8 9 5 4 3 1 1 5 0 4 8 9 6 8 0 8 5 8 9 pH BUFFER TEMPERATURE DEPENDENCE The temperature has an effect on pH The calibration buffer solutions are affected by temperature changes to a less...

Страница 24: ...ure it fits securely Insert the aspiration tube into the left side of the valve 6 and replace the titrant bottle cap with the attached cap 7 Insert the dispensing tube into the top of the valve 8 DOSING PUMP 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 start...

Страница 25: ...from Titration mode Adjust the rinses number by pressing the and keys and press Start The number of syringe rinses can be set between 1 and 5 at least three rinses are recommended to ensure that the air bubbles are completely removed To pause the prime process press the Pause key to continue press the Continue key To stop the prime process press the Stop key ...

Страница 26: ... minititrator top PUMP CALIBRATION PROCEDURE Verify the electrode has been calibrated in 8 20 pH buffer Sample preparation Using a clean tip and 2000 uL automatic pipette to precisely add the appropriate amount of HI 84502 55 Calibration Standard to a clean beaker as indicated below e g n a R w o L e g n a R h g i H L g 0 5 o t 1 0 L g 0 5 2 o t 0 4 Low Range 4 ml High Range 4 ml The calibration o...

Страница 27: ... restarted by pressing Restart Prepare a new standard rinse electrode temperature probe and dosing tip and try again Place the probe holder on the top of the beaker and secure it by turning clockwise Rinse the pH electrode with deionized water and immerse intothesampleuntiltheTeflonreferencejunctioniscompletely submerged Be sure that the tip of the electrode is not hitting the stir bar If necessar...

Страница 28: ...to the 50 mL mark with the distilled or deionized water Press Titrator Note DO NOT PLACE THE TIP INTO THE SAMPLE BEAKER PLACE THE TIP OVER A WASTE BEAKER A SMALL AMOUNT OF TITRANT IS DISPENSED WHEN THE PUMP RESETS Press Start to begin a titration Place the stir bar in the beaker and put the beaker in the minititrator top Place the probe holder on the top of the beaker and secure it by turning cloc...

Страница 29: ...ill 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 visualized during a titration by pressing Plot ON Press Plot OFF to exit this mode At the end of the titration the concentration is displayed in g L as tartaric acid The titration curve can be viewed by pressing Plot ON Pre...

Страница 30: ... 700635 or HI 700636 cleaning solutions specially designed for the wine industry 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 Up to 200 log samples can be recorded in the instrument s memory Press Restart to begin a new titration or ESC to return to the titration menu If the concen...

Страница 31: ...s out of range the or symbols are displayed in front of the reading Press Delete to delete the selected log from the memory Press Del All to delete all records Press Info to see detailed information about the highlighted record The selected record data and the titration curve data file name are displayed When an USB storage device is connected the Export key is displayed It saves the titration cur...

Страница 32: ...ed The titration data Total Titrant Volume on the x axis and pH on the y axis can be scanned through with the doted line by using the ARROW keys To zoom on the titration curve press Zoom 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 Deleting a single record will renumber the list of records If the titr...

Страница 33: ... 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 Press MENU to access the instrument s menu Press HELP to view the contextual help every time you need additional information Press STIR to start stop the stirrer Press Titrator to enter titration mode Press CAL to access the ca...

Страница 34: ...with deionized 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 T temperature probe into the sample as close as possible to the electro...

Страница 35: ...red in the log If the saved mV pH measurements are out of range the or symbols are displayed in front of the reading Use the ARROW keys to scroll the list of records Press Delete to delete the selected log from the memory Press Del All to delete all the records Press Info to see detailed information about the highlighted record Use ARROW keys when is displayed to scroll between the records Press E...

Страница 36: ...alibration 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 Deleting a single record will renumber the list of rec...

Страница 37: ...PC The logged data can also be transferred from the instrument to the PC using a USB cable Connect the USB cable and the following screen will be displayed Press Meter to generate the text file with Meter log data Press Titrator to generate the text file with Titrator log data Press Plot to generate the text files with Titration Plots The generated files are now visible and can be used for further...

Страница 38: ...r p y f i r e v d n a f f o s i p a c e h t k c e h C e l p m a s e h t f o y t i l a u q l l i f e R s e d o r t c e l e e h t n a e l C n o i t u l o s l l i f h s e r f h t i w t o n s e o d r e t e m e h T r e f f u b H p e h t t p e c c a n o i t a r b i l a c r o f n o i t u l o s e d o r t c e l e H p n e k o r B r o e d o r t c e l e e h t e c a l p e R r o d n e v e h t t c a t n o c n o ...

Страница 39: ... 2 r o 0 4 s y a l p s i d g n i k n i l b d e t c e l e s e g n a r g n o r W f o t u o n o i t a r t n e c n o C e g n a r w o L o t e g n a r e g n a h C e h t e t a r b i l a c e R e g n a R p m u p r e t e m e h t p u t r a t s t A o g o l A N N A H e h t s y a l p s i d y l t n e n a m r e p k c u t s s i s y e k e h t f o e n O r o d r a o b y e k e h t k c e h C r o d n e v e h t t c a t n...

Страница 40: ...y bubbles of air may form inside the glass bulb affecting proper functioning of the electrode These bubbles can be removed by shaking down the electrode as you would do with a glass thermometer If the bulb and or junction is dry soak the electrode in HI 70300 Storage Solution for at least one hour If the fill solution electrolyte is more than 2 cm 1 below the fill hole add HI 7082 3 5M KCl Electro...

Страница 41: ...insulation on the cable or cracks on the electrode stem or bulb Connectors must be perfectly clean and dry If any scratches or cracks are present replace the electrode Rinse off any salt deposits with water PROBE MAINTENANCE Refill the reference chamber with fresh electrolyte HI 7082 Allow the electrode to stand upright for 1 hour Follow the Storage Procedure above pH CLEANING PROCEDURE Wine depos...

Страница 42: ...solution 4 x 30 mL ELECTRODE STORAGE SOLUTION HI 70300L Electrode storage solution 500 mL ELECTRODE CLEANING SOLUTION HI 70635L Cleaning solution for wine deposits 500 mL HI 70636L Cleaning solution for wine stains 500 mL OTHER ACCESSORIES HI 70500 Tube set with cap for titrant bottle tip and valve HI 71005 8 115 Vac to 12 Vdc 800 mA HI 71006 8 230 Vac to 12 Vdc 800 mA HI 731319 Stir bar 10 pcs 25...

Страница 43: ...USERS HI 84502 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 If service is required contact your dealer If under warranty report the model n...

Страница 44: ...A Hanna Instruments Inc Highland Industrial Park 584 Park East Drive Woonsocket RI 02895 USA Technical Support for Customers Tel 800 426 6287 Fax 401 765 7575 E mail tech hannainst com www hannainst com Local Sales and Customer Service Office ...

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