Hanna Instruments HI84531 Instruction Manual
  1. Manuals
  2. Brands
  3. Hanna Instruments Manuals
  4. Measuring Instruments
  5. HI84531
  6. Instruction manual

Hanna Instruments HI84531 Instruction Manual

Total alkalinity mini titrator & ph meter for water analysis
Hide thumbs Also See for HI84531:
Table of Contents

Advertisement

Quick Links

Download this manual
HI84531
Total Alkalinity
Mini Titrator & pH Meter
for Water Analysis

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the HI84531 and is the answer not in the manual?

Questions and answers

Related Manuals for Hanna Instruments HI84531

Summary of Contents for Hanna Instruments HI84531

  • Page 1 HI84531 Total Alkalinity Mini Titrator & pH Meter for Water Analysis...
  • 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.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1. Preliminary Examination ..................... 4 2. Specifications ........................5 3. General Description & Intended Use ..................7 4. Principle of Operation ......................9 5. Functional Description ....................... 10 6. Titrator Startup ......................... 13 7. Setup Menu ........................14 8.

  • Page 4: Preliminary Examination

    1. PRELIMINARY EXAMINATION Remove the instrument and accessories from the packaging and examine it carefully. For further assistance, please contact your local Hanna Instruments Office or email us at tech@hannainst.com. HI84531 mini titrator is supplied with: • HI1131B pH electrode •...

  • Page 5: Specifications

    2. SPECIFICATIONS Low Range (LR): 30.0 - 400.0 mg/L CaCO 0.6 - 8.0 meq/L CaCO Range High Range (HR): 300 - 4000 mg/L CaCO 6.0 - 80.0 meq/L CaCO LR: 0.1 mg/L / 0.1 meq/L Resolution HR: 1 mg/L / 0.1 meq/L LR: ±1 mg/L or 3% of reading @ 25 °C whichever is greater Accuracy Titrator...
  • Page 6 0 to 50 °C (32 to 122 °F); max 95% RH non-condensing Other Specifications Power supply 12 Vdc power adapter Dimensions 235 x 200 x 150 mm (9.2 x 7.9 x 5.9”) Weight 1.9 kg (67.0 oz.) Required Reagents HI84531-50 Low Range Titrant HI84531-51 High Range Titrant HI84531-55 Calibration Standard...

  • Page 7: General Description & Intended Use

    The meter benefits from Hanna Instruments’ many years of experience as a manufacturer of quality analytical instrumentation. A clear and well-designed user interface makes the meter intuitive and simple to use.
  • Page 8 HI84531 mini titrator uses a method based on Standard Methods for the Examination Water and Wastewater. Standard Methods refers two types of alkalinity: 1. Strong Alkalinity or Phenolphthalein Alkalinity is typically determined by a titration to pH 8.3. 2. Total Alkalinity or Bromcresol Green Alkalinity is typically determined by a titration to pH 4.5.

  • Page 9: Principle Of Operation

    (i.e. phenolphthalein or bromocresol green), however this endpoint can be become objective depending on the analysts. The HI84531 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 endpoint.

  • Page 10: Functional Description

    5. FUNCTIONAL DESCRIPTION Front View 1. Dosing pump valve 2. Aspiration tube 3. Titrant bottle 4. Dispensing tube 5. Syringe 6. Temperature probe 7. pH electrode 8. Electrode holder 9. Beaker Top View 1. Titrant bottle 2. Dispensing tube 3. Electrode holder 4.
  • Page 11 Rear View 1. Power switch 2. USB connector (PC interface) 3. USB connector (storage interface) 4. Power adapter 5. BNC electrode connector 6. Reference electrode connector 7. Temperature probe connector Keypad Description The keypad contains 8 direct keys and 3 functional keys with the following functions: Press the functional key to select the virtual option displayed above it on the LCD.
  • Page 12 Display Indicators During the instrument’s operation information is displayed on the LCD. 1. Current time and instrument mode information (pH meter or Titrator) 2. pH electrode condition 3. Instrument status 4. Virtual option keys 5. Stirrer and reading status 6. Main reading information 7.

  • Page 13: Titrator Startup

    6. TITRATOR STARTUP This is a general outline of the steps required to perform a titration. The following topics are expanded upon each section that follows. • Place the instrument on a flat table. Do not place the instrument in direct sun light. •...

  • Page 14: Setup Menu

    7. SETUP MENU The titrator’s setup menu may be accessed from the main screen (meter or titrator) 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 ARROW keys permit the user to scroll the setup parameters.
  • Page 15 From your knowledge of expected concentrations, use the table below to determine which settings and solutions are appropriate: Measurement Range High mg/L 30.0 - 400.0 300 - 4000 Range meq/L 0.6 - 8.0 6.0 - 80.0 Acidity Type Total Strong Total Strong pH Endpoint...
  • Page 16 Time Press the Modify key to change the 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 ARROW keys to change the value. Press Accept to confirm the new value or ESC to return to the setup.
  • Page 17 Decimal Separator Select the symbol used for a decimal separator. LCD 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 Press Modify to change the backlight level.
  • Page 18 Tutorial Enable or Disable the Tutorial. This helpful tool offers additional information during calibration and titration. Meter Information Press Select to view the firmware version, language version, mV factory calibration date and time, temperature factory calibration date and time and method version. Press ESC to return to the setup menu.

  • Page 19: Guide To Display Codes

    8. GUIDE TO DISPLAY CODES This screen appears when the instrument is turned on during the initialization process. Titration screen display. Titration screen when a titration is in progress. Prime burette screen. Prime burette screen when the dosing system is running. This error message appears when the pump is not working properly.

  • Page 20: Pump Calibration Messages

    8.1. PUMP CALIBRATION MESSAGES Pump calibration is initiated by pressing the Start key. This screen appears while pump calibration is in progress. Press ESC or Stop key, to return to the Pump Calibration screen. This error message appears during pump calibration when the endpoint can not be reached and the maximum amount of titrant is exceeded.

  • Page 21: Ph Calibration Messages

    8.2. 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.

  • Page 22: Titration Messages

    8.3. 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 in mg/L or meq/L as CaCO is displayed automatically at the end of the titration.

  • Page 23: Electrode Preparation

    9. ELECTRODE PREPARATION 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 24: Electrode Calibration Procedure

    8.30 and 10.01 pH. For a one point calibration any of the three buffers may be used, 8.30 pH is recommended. Note: The HI84531 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 25 One-Point Calibration • The 8.30 buffer will be selected by default. 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.
  • Page 26 • Press Confirm to confirm the calibration. • 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 ESC to exit without performing the third calibration point.
  • Page 27 • 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. •...

  • Page 28: Ph Buffer Temperature Dependence

    11. pH BUFFER TEMPERATURE DEPENDENCE Temperature has an effect on pH. The calibration buffer solutions are affected by temperature changes to a lesser degree than normal solutions. During calibration, the instrument will automatically calibrate to the pH value corresponding to the measured or set temperature. TEMP pH BUFFERS °C...

  • Page 29: Dosing Pump Installation

    12. DOSING PUMP INSTALLATION To install the dosing pump follow the procedure below: 1. Extend the plunger on the 5 mL syringe to its maximum volume. 2. Unscrew the syringe-fixing nut and remove the o-ring. Front view 3. Place the syringe in the dedicated spot on the top of the meter.

  • Page 30: Dosing Pump Prime Procedure

    13. DOSING PUMP PRIME PROCEDURE Prime cycle should be performed: • if 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 31 • To pause the prime process press the Pause, to continue press the Continue. To stop the prime process press Stop. Note: This error message appears when the pump is not working properly. Check the tubing, valve and syringe. Press Restart to try again.

  • Page 32: Pump Calibration Procedure

    0.6 to 8.0 6.0 to 80.0 • Verify the electrode has been calibrated in 8.30 pH buffer. • Ensure the pump is primed with the correct titrant for the selected range (HI84531-50 Low Range Titrant and HI84531-51 High Range Titrant).
  • Page 33 • Press Start, wait for the syringe refill. • Place the stir bar in the calibration solution beaker and put the beaker in the mini titrator top. • Place the probe holder on the top of the beaker and secure it by turning clockwise. •...
  • Page 34 • At the end of the calibration, ”Calibration Completed“ appears on display. To repeat the calibration press Restart or ESC to return to the main screen. Notes: If temperature probe is not connected, Manual Temperature Compensation is used and MTC appears on the right side of the screen.
  • Page 35 This error message appears when the pump is not working properly. Check the tubing, valve and syringe. Press Restart to try again.

  • Page 36: Titration Procedure

    15. TITRATION PROCEDURE For best accuracy, before taking any measurement, ensure that the pump is calibrated on the selected range following the description in the PUMP CALIBRATION PROCEDURE section. Note: Verify that the instrument has been calibrated (pH and pump) before performing any titrations.
  • Page 37 • 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 into the sample until the reference junction is completely submerged. Be sure that the tip of the electrode is not hitting the stir bar. •...
  • Page 38 • 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.

  • Page 39: Tips For An Accurate Measurement

    • 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.
  • Page 40 If the 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.

  • Page 41: Titrator Glp Information

    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 titrator log is empty, the message “No Records Available!” will be displayed. 15.3.

  • Page 42: Ph Measurement

    16. pH MEASUREMENT HI84531 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.

  • Page 43: View/Delete Recorded Ph Data

    If measurements are taken successively in different samples, it is recommended to rinse the electrodes thoroughly 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.

  • Page 44: Ph Meter Glp Information

    Use ARROW keys when is displayed to scroll between the records. Press ESC 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 45: Pc Interface & Data Transfer

    17. PC INTERFACE & DATA TRANSFER Data stored on meter with the LOG function during pH/mV measurement and titrations can be transferred from the meter to a USB stick using the Export function from the log recall menu. Two text files are transferred on the USB stick.

  • Page 46: Electrode Conditioning & Maintenance

    If any scratches or cracks are present, replace the electrode. Rinse off any salt deposits with distilled/deionized water. pH Cleaning Procedure • Soak in Hanna Instruments HI7061 HI8061 General cleaning solution for approximately ½ hour.

  • Page 47: Troubleshooting Guide

    19. TROUBLESHOOTING GUIDE SYMPTOMS PROBLEM SOLUTION Slow response/excessive drift. Dirty pH electrode. Soak the electrode tip in HI7061 cleaning solution for 30 minutes and follow the cleaning procedure. Refill with fresh fill solution. Reading fluctuates up and Clogged/dirty junction. Low Soak the electrode tip in HI7061 down (noise).
  • Page 48 Change selected range. 80 meq/L. At startup the meter displays One of the keys is stuck. Check the keyboard or contact the the Hanna Instruments logo vendor. permanently. “Error xx” message is Internal error. Power off the meter and then power displayed.

  • Page 49: Accessories

    20. ACCESSORIES REAGENTS HI84531-50 Low Range titrant, 120 mL HI84531-51 High Range titrant, 120 mL HI84531-55 Calibration standard, 230 mL pH CALIBRATION SOLUTIONS HI7004M pH 4.01 buffer solution, 230 mL HI7007M pH 7.01 buffer solution, 230 mL HI70083M pH 8.30 buffer solution, 230 mL HI7010M pH 10.01 buffer solution, 230 mL...

  • Page 50: 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 instrument) and the nature of the problem.
  • Page 51 Hanna Instruments reserves the right to modify the design, construction or appearance of its products without advance notice.
  • Page 52 World Headquarters Hanna Instruments Inc. Highland Industrial Park 584 Park East Drive Woonsocket, RI 02895 USA www.hannainst.com MAN84531 Printed in ROMANIA...

Table of Contents