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Hanna Instruments HI84531-02, Instruction Manual, Page: 30 / 44

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30

TIPS FOR AN ACCURATE MEASUREMENT

The instructions listed below should be followed carefully to ensure measurements are conducted
with the highest possible accuracy and precision.
• IT IS CRITICAL THAT THE TIP BE IMMERSED IN THE SOLUTION BEING TITRATED (APPROXIMATELY

0.25 CM).

• Use a clean, volumetric pipette to measure and transfer the necessary volume of sample into

the titration beaker.

• Calibrate the pump prior to each series of titrations.
• Calibrate the pump if the meter is left idle for several hours.
• Analyze the sample immediately after the sample is obtained.
• For better performance, soak the electrode in 

HI 70300

 storage solution for at least one hour,

before use.

• Press 

Restart

 to begin a new titration or 

ESC

 to return to the titration menu.

• If the concentration exceeds the range limits the

exceeded range limit will be displayed blinking.
Another titration can be started by pressing 

Restart

.

•

“Wrong input”

 error message appears when the

input reading (pH, temperature) exceeds the
specified limits. The pH or temperature value and
concentration will blink indicating an error.

• This screen appears when the stirrer is not working

properly. Check the stir bar and beaker content.
Press 

Restart

 to try again.

• This error message appears when the pump is not

working properly. Check the tubing, valve and
syringe. Press 

Restart

 to try again.

Summary of Contents for HI84531-02

Page 1: ...1 w w w h a n n a i n s t c o m Instruction Manual HI 84531 TOTAL ALKALINITY MINITITRATOR pH METER for Water Analysis ...

Page 2: ...y before using this meter This manual will provide you with the necessary information for correct use of this meter as well as a precise idea of its versatility 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 ...

Page 3: ...FICATIONS 6 PRINCIPLE OF OPERATION 7 FUNCTIONAL DESCRIPTION 8 TITRATOR STARTUP 10 SETUP MENU 11 GUIDE TO DISPLAY CODES 14 ELECTRODE PREPARATION 19 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 GU...

Page 4: ...e the instrument will automatically titrate the sample to the end point The current pH and temperature are continuous displayed during titration process The concentration is instantaneously displayed in selected measurement units on the large dot matrix display then the instrument is ready for another titration by pressing the Restart key Please examine this product carefully Make sure that the in...

Page 5: ...result of the carbonate CO3 2 bicarbonate HCO3 and hydroxide OH concentration in water However alkalinity concentrations include all contributions from borate phosphates silicates and other base species present Water samples are subject to interferences including Dissolved gases that contribute to alkalinity are lost or gained during sampling transport or storage these gasses can include carbon di...

Page 6: ... Up to 200 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 4 available buffers 4 01 7 01 8 30 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 t...

Page 7: ...point can be determined visually using a color indicator i e phenolphthalein or bromocresol green however this endpoint can be become objective depending on the analysts The HI 84531 removes this issue by titrating to a fixed pH endpoint 4 5 or 8 3 determined by the user The concentration can vary significantly with the selected pH end point For precise analysis the sample size volume of titrant a...

Page 8: ... connector Storage interface 13 Power adapter 14 BNC electrode connector 15 Temperature connector 16 Reference connector 17 Titrant bottle 18 Syringe 19 Aspiration tube 20 Dosing Pump Valve FRONT VIEW FUNCTIONAL DESCRIPTION OVERHEAD VIEW 1 Titrant bottle 2 Liquid Crystal Display LCD 3 Keypad 4 Electrode holder 5 Dispensing tube ...

Page 9: ...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 information is displayed on th...

Page 10: ...nstrument 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 titrant bottle cap and replace it with the b...

Page 11: ...solutions are appropriate Measurement Range mg L or meq L Press the corresponding virtual option key to change the option e g n a R t n e m e r u s a e M w o L h g i H R e g n a L g m 0 0 3 0 0 0 4 0 0 3 0 0 0 4 L q e m 0 6 8 0 6 0 0 0 8 e p y T y t i d i c A l a t o T g n o r t S l a t o T g n o r t S H p t n i o p d n E H p 5 4 H p 3 8 H p 5 4 H p 3 8 e l p m a s m u m i n i M H p 5 4 H p H p 3 ...

Page 12: ... access the calibration timeout screen pH Resolution 0 1 or 0 01 Press the displayed virtual option key to change the resolution C F or K Press the virtual option key to change the option Temperature Unit 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 ARROWkeys to change ...

Page 13: ...e display s contrast The default value is 8 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 Use theARROWkeys to change the value Press Acceptto confirm the new value or ESC to return to the setup Key Beep Select Enable to activate or Disable to deactivate the Key Beep function If enabl...

Page 14: ...vel The default value is 3 Press the corresponding virtual option key to change the option 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 the safe mode In safe mode all messages are displayed in English and tutorial and help information are not available Language Tutorial Enable or Disa...

Page 15: ...are version language version mV factory calibration date and time temperature factory calibration date and time and method version Meter Information Restore Factory Settings Press ESC to return to the setup menu Press Select to restore the factory settings Press Yes to confirm the restore process or No to return without restoring Press ESC to return to the setup menu ...

Page 16: ...Pump to calibrate Pump Press Electrode to calibrate pH Electrode This error message appears when the pump is not working properly Check the tubing valve and syringe Press Restart to try again This screen appears while pump calibration is in progress Pressing ESC or Stop key to return to the Pump Calibration screen PUMP CALIBRATION MESSAGES Pump calibration is initiated by pressing the Start key ...

Page 17: ...message appears when the pH reading exceeds the acceptable input limits 2 00 pH 16 00 When the reading has stabilized press Confirm to accept the calibration or Clear to restore the default calibration This screen appears when the stirrer is not working properly Check the stir bar and beaker content Press Restart to try again This error message appears when the pump is not working properly Check t...

Page 18: ...ts The pH or temperature value and the concentration will blink indicating an error This screen appears when the sample concentration is out of range 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 Press the ESC key to exit pH...

Page 19: ...leaned d When high accuracy is required e If the pH calibration expired warning is displayed during measurement Every time you calibrate the instrument use fresh buffers and clean the electrode see page 40 PROCEDURE A single one two or three point calibration can be performed using the four predefined buffers 4 01 7 01 8 30 and 10 01 pH For a single point calibration any of the three buffers may b...

Page 20: ...ent 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 active Press Confirm to confirm the calibration or ESC to exit calibration After the calibration point has been confirmed press ESC to exit without pe...

Page 21: ...trodes from the top of the beaker Place the third beaker with calibration buffer in the beaker holder Rinse the electrodes in a beaker containing the third buffer rinsing solution Place the electrode holder with electrodes on the top of the beaker and secure it by turning clockwise and press STIR The unstable measurement symbol will be shown on the display until the reading becomes stable When the...

Page 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...

Page 23: ...to a lesser degree than normal solutions During calibration the instrument will automati cally calibrate to the pH value corresponding to the measured or set temperature During calibration the instrument will display the pH buffer value at 25 ºC P M E T S R E F F U B H p C F 1 0 4 1 0 7 0 3 8 1 0 0 1 0 2 3 1 0 4 3 1 7 8 4 8 2 3 0 1 5 1 4 0 0 4 0 1 7 4 4 8 4 2 0 1 0 1 0 5 0 0 4 7 0 7 1 4 8 8 1 0 1 ...

Page 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...

Page 25: ...eys 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 Pausekey to continue press the Continue key To stop the prime process press the Stop key Note This error message appears when the pump is not working properly Check the tubing valve and syringe P...

Page 26: ... for several hours or once daily Press MENU select Setup and select the corresponding range according to the table below Note Failure to use a clean pipette will result in erroneous readings Fill the beaker up to the 50 mL mark with the distilled or deionized water Press CAL key The instrument displays the date and time of the last electrode calibration and the last pump calibration Press Pump key...

Page 27: ...ppears on the right side of the screen If Automatic Temperature Compensation is in use the ATC appears on the right side of the screen If an erroneous situation is encountered during the calibration an error message is displayed and the calibration can be restarted by pressing Restart Prepare a new standard rinse electrode temperature probe and dosing tip and try again If the calibration doesn t c...

Page 28: ... performing a titration in high range dispense roughly 1 mL of titrant in a waste beaker This will remove any air bubbles in the tubing Press Prime then Stop once the volume has been delivered TITRATION PROCEDURE Low Range 50 ml 30 0 400 0 mg L as CaCO3 High Range 50 ml 300 4000 mg L as CaCO3 Note Failure to use a clean pipette will result in erroneous readings Put the 50 mL sample in the 100 mL b...

Page 29: ...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 or ESC to exit this mode At the end of the titration the total or strong alkalinity of water sample in the selected unit of measurement mg L or meq L is displayed The titration curve can be viewed by pressing Plot O...

Page 30: ... For better performance soak the electrode in HI 70300 storage solution for at least one hour before use Press Restart to begin a new titration or ESC to return to the titration menu If the concentration exceeds the range limits the exceeded range limit will be displayed blinking Another titration can be started by pressing Restart Wrong input error message appears when the input reading pH temper...

Page 31: ...e saved concentration was out of range the or symbols are displayed in front of the reading Press Delete to delete the selected record from the memory Press Del All to delete all the 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 displ...

Page 32: ...e 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 all the records or No to return to the previous screen Deleting a single record will renumber the list of records If the titr...

Page 33: ...isplay 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 calibration menu Press LOG to save the current reading A me...

Page 34: ...nt 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 electrode and wait for a few seconds The ATC message will be shown on the display Autom...

Page 35: ... A list of records is stored in the pH 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 record 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 ...

Page 36: ...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 Press Yes to delete the record or No to return to the previous screen without deleting Deleting a single record will renumber th...

Page 37: ... on a 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 f...

Page 38: ...l p m a s e h t f o y t i l a u q e h t k c e h C h t i w 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 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 g n i n a e l c e d o r t c e l e e h t w o l l o F s t s i s r e p r o r r e e h t f I e r u d e c o r p e h t t c a ...

Page 39: ... e m d e y a l p s i d r o r r e l a n r e t n I d n a r e t e m e h t f f o r e w o P f I n i a g a n o t i r e w o p n e h t t c a t n o c s t s i s r e p r o r r e e h t r o d n e v e h t r o r r e r e r r i t S e g a s s e m d n e e h t t a d e y a l p s i d s i r o n o i t a r b i l a c p m u p f o n o i t a r t i t g n i n o i t c n u f t o n r e r r i t S y l r e p o r p t c a t n o c s t s...

Page 40: ...he 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 Follow the Preparation Procedure section before taking measurements Note NEVER STORE THE pH ELECTRODE IN DISTILLED OR DEIONIZED WATER PERIODIC MAINTENANCE Inspect the electrodes and the cables The cable used for connection to the instrum...

Page 41: ...mL ELECTRODES HI 1131B pH Electrode HI 7662 T Temperature probe ELECTRODE FILL SOLUTION HI 7082 Electrode fill solution 4 x 30 mL ELECTRODE STORAGE SOLUTION HI 70300M Storage Solution 230 mL HI 70300L Storage Solution 500 mL HI 80300M Storage Solution 230 mL HI 80300L Storage Solution 500 mL ELECTRODE CLEANING SOLUTION HI 7061M Electrode Cleaning Solution 230 mL bottle HI 7061L Electrode Cleaning ...

Page 42: ... the charges incurred If the instrument is to be returned to Hanna Instruments first obtain a Returned Goods Authorization number from the Technical Service department and then send it with shipping costs prepaid When shipping any instrument make sure it is properly packed for complete protection To validate your warranty fill out and return the enclosed warranty card within 14 days from the date ...

Page 43: ...in which it is used Operation of this instrument may cause unacceptable interferences to other electronic equipment thus requiring the operator to take all necessary steps to correct interferences Any variation introduced by the user to the supplied equipment may degrade the instrument s EMC performance To avoid damages or burns do not put the instrument in microwave ovens For your and the instrum...

Page 44: ...anna 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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