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34

If a calibration hasn’t been performed the message 

“Not Calibrated”

 will be displayed.

The pump 

GLP

 displays the Time and Date of the last pump calibration.

pH MEASUREMENT

The 

HI 84431

 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

. At power up the instrument enters 

pH meter

 mode. From titrator mode

press 

ESC 

until pH units are displayed.

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

timeout value set, the displayed message 

“CAL DUE”

 will blink on the left side of the display

(see 

Calibration timeout

 option in 

Setup 

for details).

Place pH electrode into electrode holder and connect it to the instrument.
Rinse the pH tip with distilled or deionized water. Immerse the pH (bottom 2 cm / 0.8”) in

the sample and stir gently for a few seconds.
For a faster response and to avoid cross-contamination of the samples, rinse the electrode tip

with a few drops of the solution to be tested, before taking measurements.
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 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.

Summary of Contents for HI 84431

Page 1: ...1 Instruction Manual HI 84431 TOTALALKALINITY MINITITRATOR pH METER for Water Analysis www hannainst com ...

Page 2: ...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 ...

Page 3: ...INCIPLE OF OPERATION 8 FUNCTIONAL AND PHYSICAL DESCRIPTION 9 TITRATOR STARTUP 12 SETUP CONFIGURATION MENU 13 ELECTRODE PREPARATION 18 ELECTRODE CALIBRATION PROCEDURE 19 pH BUFFER TEMPERATURE DEPENDENCE 23 PUMP TUBE INSTALLATION 24 PURGE 24 PUMP CALIBRATION PROCEDURE 26 TITRATION PROCEDURE 29 pH MEASUREMENT 34 TEMPERATURE CALIBRATION PROCEDURE for technical personnel only 38 TROUBLESHOOTING GUIDE 4...

Page 4: ...strument works correctly Any defective item must be returned in its original packing PRELIMINARY EXAMINATION The HI 84431 is an easy to use microprocessor based automatic minititrator and pH meter designed for the rapid and accurate analysis of Total Titratable alkalinity in water By eliminating subjective factors including color indicators errors in mathematical calculations or erratic titrant ad...

Page 5: ...g capacity and it is determined by titration with standard acid solutions Alkalinity is an important parameter for control and treatment of potable and wastewaters because it indicates the water buffering capacity ability to resist at pH change primarily because of bicarbonate carbonate content A low water alkalinity signifies that the water is susceptible to pH change and high alkalinity indicate...

Page 6: ... potentiometric titrator The instrument also can be used as a pH meter The volume of titrant dispensed necessary to reach the end point is then used to calculate the water alkalinity expressed in mg L as CaCO3 meq L as CaCO3 Interferences dissolved gases lost or gained during samples storage or transport can modify the alkalinity of the samples presence in the samples of the precipitates solid sus...

Page 7: ...it 0 5 mL min Stirring speed 600 rpm Log data Up to 50 samples pH meter pH meter 2 0 to 16 0 pH 2 00 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 3 available buffers 4 01 8 30 10 01 Temperature manual or automatic from compensation 20 to 120 C 4 to 248 F Log data Up to 50 samples Temperature Range 20 0 to 120 0 C 4 0 to 248 0 F Resolution ...

Page 8: ...of the alkalinity range is limited by the pH sample if the measured pH is greater than 8 3 both total and strong alkalinity can be determined If the sample pH is lower than 8 3 only total alkalinity can be determined The HI 84331 utilizes two different titration solutions to cover the entire measurement range If the range is changed the titrant must be changed and the peristaltic pump must be prim...

Page 9: ... for Temperature Probe 5 Electrode holder 6 Dedicated guide tube for titrant tip 7 Peristaltic pump tube FRONT VIEW FRONT VIEW FRONT VIEW FRONT VIEW FRONT VIEW REAR VIEW REAR VIEW REAR VIEW REAR VIEW REAR VIEW 8 Temperature probe 9 pH Electrode 10 Beaker 11 BNC electrode connector 12 Temperature probe socket 13 Power switch 14 Power adapter connector 15 Peristaltic pump ...

Page 10: ...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 MENU used to enter SETUP Recall or GLP selection menu while instrument is in pH or Titration main screen STIR used to start stop the stirrer Note The stirer starts automatically during pump calibration and titration and cannot be stopp...

Page 11: ... Titrator 2 pH electrode condition information 3 Main reading information 4 Instrument status information 5 Functional key area 6 Indicates that the displayed value can be changed using ARROW keys 7 Temperature value C F 8 pH temperature compensation mode Manual or Automatic 9 Stirrer and reading status area GUIDE TO INDICATORS During the instrument s operation information is displayed on the LCD ...

Page 12: ...ils Connect the pH sensor and temperature probe to the instrument Calibrate the pH electrode At least a single point calibration is necessary for titration Place the peristaltic pump tube on the pump inlet tube is connected with the reagent bottle outlet tube is connected with the dosing tip See the Pump Tube Replacement section for the procedure Remove the reagent bottle cap and replace the bottl...

Page 13: ... the instrument s operation parameters The ARROW keys permit the user to scroll the setup parameters Press HELP to view the contextual help Press ESC to return to the main screen Options Total LR total alkalinity low range Total HR total alkalinity high range Strong LR strong alkalinity low range Strong HR strong alkalinity high range Press the corresponding function key to change the option A t i...

Page 14: ...der to change the pH resolution Options C F Press the function key in order to change the temperature unit Temperature unit Options 0 to 8 Press Modify to access the backlight level Backlight Calibration timeout Options 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 va...

Page 15: ...and time Press Modify to change the date time Use the ARROW keys or in order to increase decrease the value Press Accept to confirm the value or ESC to return to the setup menu 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 displayed constrast Press Accept to confirm or ESC to re...

Page 16: ...mat Press Modify to change the Date Format This option is used to enable disable tutorial mode If enabled this option will provide the user short guides on the screen Press the function key to select this option Tutorial Option AM PM or 24 hours Press the functional key to select the new value Time format If no language can be loaded at startup the instrument will work in the safe mode In safe mod...

Page 17: ...e and time Press ESC to return to the Setup mode Meter information 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 Beep On ...

Page 18: ... will disappear when rinsed with distilled water During transport tiny bubbles of air may have formed inside the glass bulb The electrode cannot function properly under these conditions These bubbles can be removed by shaking down the electrode as you would do with a glass thermometer If the bulb is dry soak the electrode in HI 70300 Storage Solution for at least one hour ...

Page 19: ...er 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 each beaker with the calibration buffer solution Remove the protective cap and rinse the electrodes with some of the buffer solution to be used for the first calibration point Open fill hole on electr...

Page 20: ... 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 buffer into beaker and place in beaker holder Rinse the electrodes in a beaker containing the second buffer rinsing solution Place the electrode holder with electrodes on the top of the beaker...

Page 21: ...the selected buffer the unstable measurement symbol will disappear and the Confirm key will become active Press Confirm to confirm the calibration The instrument stores the calibration value and returns to pH meter titrator calibration menu where the date and time for the last pH calibration will be updated Notes A buffer confirmed during the calibration process is removed from the list of calibra...

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

Page 23: ...ing to the measured or set temperature During calibration the instrument will display the pH buffer value at 25 C pH BUFFER TEMPERATURE DEPENDENCE P M E T S R E F F U B H p C F 1 0 4 0 3 8 1 0 0 1 0 2 3 1 0 4 8 4 8 2 3 0 1 5 1 4 0 0 4 4 4 8 4 2 0 1 0 1 0 5 0 0 4 1 4 8 8 1 0 1 5 1 9 5 0 0 4 7 3 8 2 1 0 1 0 2 8 6 0 0 4 3 3 8 6 0 0 1 5 2 7 7 1 0 4 0 3 8 1 0 0 1 0 3 6 8 2 0 4 7 2 8 6 9 9 5 3 5 9 3 0 4...

Page 24: ...E 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 rolls Fix the second pump fixing ring on its location Determine which titrant is required for the expected alkalinity range selected see table in Alkalinity Type Attach the tube to the reagent bottle Note Purge the peristaltic ...

Page 25: ...tes To stop purging at any time and return to the main screen press ESC or Stop During a purge the remaining time until the purge process will be completed is shown on the lower right side of the display Press Pause to interrupt the purge process Press Pause or Stop by pressing the corresponding function key in the purge screen after the first drops of fresh titrant appear at the dosing tip in cas...

Page 26: ...ge Strong LR Total LR use the HI 84431 50 For High Range Strong HR Total HR use the HI 84431 51 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 SETUP alkalinity type and purge unit with titrant before performing the pump calibration...

Page 27: ... of time that has passed since beginning of the calibration Insert the dosing tip in the appropriate guide tube holder place and insert it in the solution Note The chemical reagents may be hazardous if improperly handled Read the Material Safety Data Sheets MSDS before performing the test From the titrator main screen press CAL The instrument displays the date and time of the last electrode calibr...

Page 28: ...s encountered during the calibration an error message is displayed and the calibration can be restarted by pressing Restart If the calibration doesn t complete within 6 minutes the error message Too much standard will be displayed and the calibration can be restarted by pressing Restart after a new standard is prepared When pump calibration is complete carefully unscrew electrode holder with pH el...

Page 29: ...on the instrument top Note Water samples must be collected and stored in capped botlles Position the electrode holder on the top of the beaker and secure it by turning clockwise Immerse the pH and the temperature electrodes approximatively 2 cm 0 8 into the sample to be tested paying attention not to touch the stir bar Use O Rings provided to secure the pH electrode in holder Insert the dosing tip...

Page 30: ... the display unit 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 50 log samples can be recorded in the instrument s memory When the titrator free log space is under 12 the message will be shown permanently If the concentration is out of limits an exceeded range limit message will be ...

Page 31: ...e titrant from dispensing tip 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 The titration can be restarted after a new sample is prepared by pressing Restart TIPS FOR AN ACCURATE MEASUREMENT Calibrate the instrument in 8 30 pH buffer solution at least once a day before you start to perform measurements Purge the...

Page 32: ...to scroll between the log records If Delete was pressed the instrument will ask for confirmation Use the ARROW keys to focus on the record to be deleted Press Confirm to delete the record or ESC to return to the previous screen 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 the records or ESC to ret...

Page 33: ...alibration hasn t been performed the message Not Calibrated 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 to view the electrode s last calibration parameters and date Press GLP pump to view the pump s last calibration time and date If GLP elec is p...

Page 34: ... the display see Calibration timeout option in Setup for details Place pH electrode into electrode holder and connect it to the instrument Rinse the pH tip with distilled or deionized water Immerse the pH bottom 2 cm 0 8 in the sample and stir gently for a few seconds For a faster response and to avoid cross contamination of the samples rinse the electrode tip with a few drops of the solution to b...

Page 35: ...stilled water and then with some of the next sample to prevent cross contamination pH measurements are 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 M temperature probe into the sample in the dedicated guide tube and wait for a few seconds Th...

Page 36: ...cords is stored in the pH log Use the ARROW keys to scroll the list of records If More is pressed a complete set of data is displayed Use ARROW keys when is displayed to scroll between the records Press More to see detailed information about the highlighted record Press Delete to enter record deleting mode Press Delete All to enter all records deleting mode If Delete was pressed the instrument wil...

Page 37: ...inverse mode are from the previous calibration If a calibration hasn t been performed the message Not Calibrated will be displayed The pH meter GLP information references the last pH calibration data To view this information press MENU key while in pH meter mode then GLP A set of information regarding electrode calibration is displayed If Delete All was pressed the instrument will ask for confirma...

Page 38: ...o enter user calibration screen press and hold down the ARROW keys simultaneously then power on the instrument After a few seconds the User calibration screen is displayed Press Temp function key to enter temperature calibration Immerse the temperature probe in the vessel with ice and water as near as possible to the reference thermometer Allow a few seconds for the probe to stabilize Use the ARRO...

Page 39: ...nd close to the selected calibration point the unstable measurement symbol will disappear and the Confirm key will become active Press Confirm to confirm the calibration point The instrument will return to the pH meter titrator main screen Note If the reading is not close to the selected calibration point the Wrong message will be displayed Change the temperature probe and restart the calibration ...

Page 40: ...m u p g n o r W n o i t u l o s n o i t a r b i l a c p m u p n e k o r B g n i b u t s e d o r t c e l e n e k o r B d n a t c a t n i s i g n i b u t y f i r e V n e h w s e s s a p t n a r t i t d n a e d o r t c e l e e h t y f i r e V d e g r u p y l t n e c e r d e t a r b i l a c n e e b s a h e h t k c e h C s r e f f u b H p h s e r f n i n o i t u l o s n o i t a r b i l a c p m u p d r ...

Page 41: ...e the electrode Rinse off any salt deposits with water S M O T P M Y S S M O T P M Y S S M O T P M Y S S M O T P M Y S S M O T P M Y S M E L B O R P M E L B O R P M E L B O R P M E L B O R P M E L B O R P N O I T U L O S N O I T U L O S N O I T U L O S N O I T U L O S N O I T U L O S n i n o i t a r t i t a r e t f A h g i H e g n a R t n e m u r t s n i e h t r o L g m 0 0 0 4 s y a l p s i d g n...

Page 42: ...I 7004M 6 Buffer solution pH 4 01 6 x 230mL HI 70083M 6 Buffer solution pH 8 30 6 x 230mL HI 7010M 6 Buffer solution pH 10 01 6 x 230mL ELECTRODES HI1131B pH Electrode HI 7662 M Temperature probe ELECTRODE FILL SOLUTION HI 7071 Filling solution 4x30 mL for HI 1131B ELECTRODE STORAGE SOLUTION HI 70300M Storage Solution 230 mL bottle CLEANING SOLUTION HI 7061M Electrode Cleaning Solution 230 mL bott...

Page 43: ...en shipping any instrument make sure it is properly packaged for complete protection To validate your warranty fill out and return the enclosed warranty card within 14 days from the date of purchase WARRANTY Hanna Instruments reserves the right to modify the design construction and appearance of its products without advance notice Before using this product make sure that it is entirely suitable fo...

Page 44: ...nsocket RI02895USA Local Sales and Customer Service office Hanna Instruments United States Inc HighlandIndustrialPark 584ParkEastDrive Woonsocket RI02895USA Tel 800 426 6287 Fax 401 765 7575 www hannainst com usa Technical Support for customers Telephone 800 426 6287 Fax 401 765 7575 E mailtech hannainst com ...

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