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Hanna Instruments HI96735C Instruction Manual
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Hanna Instruments HI96735C Instruction Manual

Hardness ism
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HI96735C
Hardness ISM

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Summary of Contents for Hanna Instruments HI96735C

  • Page 1 HI96735C Hardness 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 ........................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 HI96735 Ion Selective Meter is supplied complete with: • Sample Cuvettes and Caps (2 pcs.) •...
  • Page 5 HI96735 is an auto diagnostic portable microprocessor meter that benefits from Hanna Instruments’ years of experience as a manufacturer of analytical instruments. It has the advanced optical system based on a special Light Emitting Diode (LED) and a narrow band interference filter that allows most accurate and repeatable readings.

  • Page 6: Required Reagents

    0 to 250 mg/L Range 200 to 500 mg/L 400 to 750 mg/L 1 mg/L from 0 to 100 mg/L Resolution 5 mg/L from 100 to 750 mg/L LR ±5mg/L ±4% of reading Accuracy MR ±7 mg/L ±3% of reading @25 °C (77 °F) HR ±10 mg/L ±2% of reading Light Source...
  • 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’ HI96735 colorimeter is based on special subminiature LED and narrow‑band interference filters to guarantee both high performance and reliable results.

  • Page 9: Instrument Description

    The microprocessor uses this potential to convert the incoming value into the desired measuring unit and to display it on the LCD. The measurement process is carried out in two phases: first the meter is zeroed and then the actual measurement is performed.

  • 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 pressing RANGE/GLP (“GLP” appears), it enables consulting of user calibration date or restore factory calibration.
  • 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 Over Range: A flashing value of the maximum concentration indicates an over range condition. The concentration of the sample is beyond the programmed range: dilute the sample and re‑run the test. c) during calibration procedure Standard Low: The standard reading is less than expected. Standard High: The standard reading is higher than expected.
  • Page 13 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 14 • Proper use of the powder reagent packet: (a) use scissors to open the powder packet; (b) push the edges of the packet to form a spout; (c) pour out the content of the packet. • It is important that the sample does not contain any debris. This would corrupt the reading. •...
  • Page 15 Prepare the instrument for measurement as follows: • Unpack the instrument by removing the dust protection sleeve from the instrument cuvette holder. • Place the battery in the instrument as described in the “BATTERY REPLACEMENT” chapter. • Place the instrument on a flat table. •...
  • Page 16 • Add two drops of HI93735B‑0 buffer reagent. Replace the cap and invert 5 times to mix. • Place the cuvette into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove. • Press ZERO/CFM and the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase.
  • Page 17 • Add the content of 1 packet of HI93735C‑0 fixing reagent. Replace the cap shake gently to mix 20 seconds. • Replace the cuvette into the holder and ensure that the notch on the cap is positioned securely into the groove. •...
  • Page 18 Note: If the sample is very acidic, some extra drops of HI93735B-0 buffer reagent may be added. 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.
  • Page 19 • Place the CAL Check Standard HI96735‑11 Cuvette A into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove. • Press ZERO/CFM and the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase.
  • Page 20 • Press CAL CHECK key and the lamp, cuvette and detector icons together with “CAL CHECK” will appear on the display, depending on the measurement phase. • At the end of the measurement the display will show the validation standard value. The reading should be within specifications as reported in the CAL Check Standard Certificate.
  • Page 21 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 22 • 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 23: 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 HI96735-11 Cuvettes, A and B are free of fingerprints or dirt and that they are inserted correctly.
  • Page 24 • 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 /UNIT to confirm. Now the display will show the day blinking. •...
  • Page 25 • The instrument displays “Stor” for one second and the calibration is saved. • The instrument will return automatically to measurement mode by displaying dashes on the LCD.

  • Page 26: 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 RANGE/GLP key to enter GLP mode. The calibration month and day will appear on the main display and the year on the secondary display.
  • Page 27 • Press READ /UNIT to enter in the factory calibration restore screen. The instrument asks for confirmation of user calibration delete. • 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.
  • Page 28 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. If a valid measurement was displayed before auto‑shut off, the value is displayed when the instrument is switched on. The blinking “ZERO” means that a new zero has to be performed. One fresh battery lasts for around 750 measurements, depending on the light level.
  • Page 29 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 30 Reagent Set HI93735-00 Reagents for 100 tests (LR, 0 to 250 mg/L) HI93735-01 Reagents for 100 tests (MR, 200 to 500 mg/L) HI93735-02 Reagents for 100 tests (HR, 400 to 750 mg/L) Reagents for 300 tests HI93735-0 (LR ‑ 100 tests, MR ‑ 100 tests, HR ‑ 100 tests) Other Accessories HI96735-11 CAL Check™...

  • 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 MAN96735 Printed in ROMANIA...