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Hanna Instruments HI96734C Instruction Manual
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Hanna Instruments HI96734C Instruction Manual

Free and total chlorine high range ism
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HI96734C
Free and Total Chlorine High
Range ISM

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Summary of Contents for Hanna Instruments HI96734C

  • Page 1 HI96734C Free and Total Chlorine High Range ISM...
  • 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 PRELIMINARY EXAMINATION .................... GENERAL DESCRIPTION ....................ABBREVIATIONS ......................SPECIFICATIONS ......................PRECISION AND ACCURACY ....................PRINCIPLE OF OPERATION ....................FUNCTIONAL DESCRIPTION ....................ERRORS AND WARNINGS ....................GENERAL TIPS FOR AN ACCURATE MEASUREMENT ............. STARTUP ........................RANGE SELECTION......................MEASUREMENT PROCEDURE .................... VALIDATION PROCEDURE ....................CALIBRATION PROCEDURE ....................
  • Page 4 Please examine this product carefully. Make sure that the instrument is not damaged. If any damage occurred during shipment, please contact your local Hanna Instruments Office. Each HI96734 Ion Selective Meter is supplied complete with: • Sample Cuvettes and Caps (2 pcs.) •...
  • Page 5 The validation procedure is extremely user friendly. Just use the exclusive Hanna Instruments ready‑made, NIST traceable standards to verify the performance of the instrument and recalibrate if necessary.
  • Page 6 Free Cl 0.00 to 10.00 mg/L Range Total Cl 0.00 to 10.00 mg/L 0.01 mg/L (0.00‑3.50 mg/L) Resolution 0.10 mg/L (above 3.50 mg/L) Accuracy ±0.03 mg/L ±3% of reading @25 °C (77 °F) Light Source Tungsten lamp Light Detector Silicon Photocell with narrow band interference filter @525nm Adaptation of the USEPA method 330.5 and Standard Method Method 4500‑Cl G.
  • Page 7 Precision is how closely repeated measurements agree with each other. Precision is usually expressed as standard deviation (SD). Accuracy is defined as the nearness of a test result to the true value. Although good precision suggests good accuracy, precise results can be inaccurate. The figure explains these definitions.
  • Page 8 The optical system of Hanna Instruments’ HI96 series colorimeters is based on special subminiature tungsten lamps and narrow‑band interference filters to guarantee both high performance and...

  • Page 9: Instrument Description

    INSTRUMENT DESCRIPTION 1) RANGE/GLP key 2) CAL CHECK key 3) ZERO/CFM key 4) READ /TIMER key 5) ON/OFF key 6) Liquid Crystal Display (LCD) 7) Cuvette alignment indicator 8) Cuvette holder KEYPAD DESCRIPTION • ON/OFF: to turn the meter on and off. •...

  • Page 10: Operating Modes

    OPERATING MODES • Measurement mode: default operation mode, enables both validation and measurement. • Calibration mode: may be entered by keeping CAL CHECK pressed for three seconds (the “CAL” tag appears), it enables calibration of the instrument. • GLP mode may be entered by keeping RANGE/GLP pressed for three seconds (“GLP”...
  • Page 11 The instrument shows clear messages when erroneous condition appears. Messages are also displayed when the obtained values are outside expected range. The beeper is playing a beep on errors. a) on zero reading Light High: There is too much light to perform a measurement. Please check the preparation of the zero cuvette.
  • Page 12 Under range: A blinking “0.00” indicates that the sample absorbs less light than the zero reference. Check the procedure and make sure you use the same cuvette for reference (zero) and measurement. Over Range: A flashing value of the maximum concentration indicates an over range condition.
  • Page 13 Cooling lamp: The instrument waits for the lamp to cool down. Battery low: The battery must be replaced soon. Dead battery: This indicates that the battery is dead and must be replaced. Once this indication is displayed, normal operation of the instrument will be interrupted.
  • Page 14 The instructions listed below should be carefully followed during testing to ensure best accuracy. • Color or suspended matter in large amounts may cause interference, therefore these should be removed by treatment with active carbon and by prior filtration. • For a correct filling of the cuvette: the liquid in the cuvette forms a concavity on the top; the bottom of this concavity must be at the same level of the 10 mL mark.
  • Page 15 • In order to measure exactly 5 mL of reagent with the 5 mL syringe: (a) push the plunger completely into the syringe and insert the tip into the reagent bottle. (b) pull the plunger up until the lower edge of the seal is exactly on the 5 mL mark. (c) take out the syringe and clean the outside of the syringe tip.
  • Page 16 • Shaking the cuvette can generate bubbles in the sample, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the cuvette. • Do not let the reacted sample stand too long after reagent is added, or accuracy will be lost. •...
  • Page 17 HI96734 can measure Free chlorine when range P1 is selected or Total chlorine when range P2 is selected. To change the active range follow the procedure: • Turn the meter on by pressing ON/OFF. The display briefly shows all tags on. •...
  • Page 18 To compensate the meter for the sample turbidity or color, the measurement takes place in two phases. First, the meter is zeroed using the unreacted sample. After the reagents are added the reacted sample is measured. Important note: Free and Total Chlorine have to be measured separately with fresh unreacted samples if both values are requested.
  • Page 19 • Fill the cuvette up to the 10 mL mark with 5 mL of unreacted sample, using the 3 mL plastic pipette. Note: Rinse the 3 mL plastic pipette several times with sample before adding it to the cuvette. • Replace the cap and shake gently for some seconds. •...
  • Page 20 • After a few seconds, the display will show “-0.0-”. The meter is now zeroed and ready for measurement. • Remove the cuvette. • Only in case of total chlorine measurement, add 3 drops of HI93734C‑0 reagent to the cuvette. •...
  • Page 21 • Press and hold READ /TIMER for three seconds. The display will show the countdown prior to measurement. The beeper is playing a beep at the end of countdown period. 3" Alternatively, wait for 1 minute for free chlorine or 2’30’’ for total chlorine and just press READ /TIMER.
  • Page 22 Use the validation procedure to ensure that the instrument is properly calibrated. Warning: Do not validate the instrument with any standard solutions other than the Hanna Instruments CAL Check Standards, otherwise erroneous results will be obtained. Note: The validation is performed only for the selected parameter. For full validation of the instrument, the following procedure must be performed for each parameter.
  • Page 23 • After a few seconds, the display will show “-0.0-”. The meter is now zeroed and ready for validation. • Remove the cuvette. • Place the CAL Check Standard HI96734‑11 Cuvette B into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove. •...
  • Page 24 Note: It is possible to interrupt calibration procedure at any time by pressing CAL CHECK or ON/OFF keys. Warning: Do not calibrate the instrument with standard solutions other than the Hanna Instruments CAL Check Standards, otherwise erroneous results will be obtained.
  • Page 25 • Press ZERO/CFM and the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. • After a few seconds the display will show “-0.0-”. The meter is now zeroed and ready for calibration. The blinking “READ” asks for reading calibration standard. •...

  • Page 26: Date Input

    • After measurement the instrument will show for three seconds the CAL Check Standard value. Note: If the display shows “STD HIGH”, the standard value was too high. If the display shows “STD LOW”, the standard value was too low. Verify that both CAL Check Standards HI96734-11 Cuvettes, A and B are free of fingerprints or dirt and that they are inserted correctly.
  • Page 27 • Press RANGE/GLP to edit the desired month (01‑12). If the key is kept pressed the month number is automatically increased. • When the correct month has been set, press ZERO/CFM or READ /TIMER to confirm. Now the display will show the day blinking. •...

  • Page 28: Last Calibration Date

    In the GLP mode, the last user calibration date can be consulted and the factory calibration can be restored. LAST CALIBRATION DATE To display the calibration date: • Press and hold for three seconds RANGE/GLP to enter GLP mode. The calibration month and day will appear on the main display and the year on the secondary display.
  • Page 29 • Press ZERO/CFM to restore the factory calibration or press RANGE/GLP again to abort factory calibration restore. • The instrument briefly notifies “donE” when restores factory calibration and returns to measurement mode. To save battery, the instrument shuts down after 10 minutes of non‑use in measurement mode and after 1 hour of non‑use in calibration mode.
  • Page 30 To replace the instrument’s battery, follow the steps: • Turn the instrument off by pressing ON/OFF. • Turn the instrument upside down and remove the battery cover by turning it counterclockwise. • Extract the battery from its location and replace it with a fresh one. •...

  • Page 31: Recommendations For Users

    To validate your warranty, fill out and return the enclosed warranty card within 14 days from the date of purchase. Hanna Instruments reserves the right to modify the design, construction or appearance of its products without advance notice.
  • Page 32 World Headquarters Hanna Instruments Inc. Highland Industrial Park 584 Park East Drive Woonsocket, RI 02895 USA www.hannainst.com Local Office Hanna Instruments USA 270 George Washington Highway Smithfield, RI 02917 Phone: 800.426.6287 Fax: 401.765.7575 e‑mail: tech@hannainst.com MAN96734 Printed in ROMANIA...