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Summary of Contents for Hanna Instruments HI96711C
- Page 1 HI96711C Free and Total Chlorine 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 ....................
- 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 HI96711 Ion Selective Meter is supplied complete with: • Sample Cuvettes and Caps (2 pcs.) •...
- Page 5 HI96711 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 tungsten lamp and a narrow band interference filter that allows most accurate and repeatable readings.
- Page 6 Range Free Cl 0.00 to 5.00 mg/L Total Cl 0.00 to 5.00 mg/L Resolution 0.01 mg/L from 0.00 to 3.50 mg/L 0.10 mg/L from 3.50 mg/L to 5.00 mg/L Accuracy ±0.03 mg/L ± 3% of reading @25 °C (77 °F) Light Source Tungsten lamp Light Detector...
- 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 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 DISPLAY ELEMENTS DESCRIPTION 1) The measuring scheme (lamp, cuvette, detector), appears during different phases of zero or reading measurement 2) Error messages and warnings 3) The battery icon indicates the charge state of the battery 4) The hourglass appears when an internal check is in progress 5) Status messages 6) The chronometer appears when the reaction timer is running 7) The month, day and date icons appear when a date is displayed...
- 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 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. Change the battery and restart the meter. The instructions listed below should be carefully followed during testing to ensure best accuracy.
- Page 14 • It is important that the sample does not contain any debris. This would corrupt the reading. • Each time the cuvette is used, the cap must be tightened to the same degree. • Whenever the cuvette is placed into the measurement cell, it must be dry outside, and completely free of fingerprints, oil or dirt.
- 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 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 17 • Remove the cuvette. • Add the content of one packet of HI93701‑0 reagent. Replace the cap and shake gently for 20 seconds. • Replace the cuvette into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove.
- Page 18 • The instrument directly displays concentration in mg/L of free chlorine on the Liquid Crystal Display. INTERFERENCES Interference may be caused by: Bromine Iodine Chlorine Dioxide Ozone Oxidized Manganese and Chromium In case of water with alkalinity greater than 250 mg/L CaCO or acidity greater than 150 mg/L CaCO the color of the sample could disappear or develop only partially.
- Page 19 • 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 measurement. • Remove the cuvette and add one packet of HI93711‑0 reagent.
- Page 20 • 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 2 minutes and 30 seconds and just press READ /TIMER. In both cases, the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase.
- Page 21 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 22 • After a few seconds, the display will show “-0.0-”. The meter is now zeroed and ready for validation. • Remove the cuvette. • Place the specific CAL Check Standard Cuvette B into the cuvette holder, for: Free Chlorine: B, HI96701‑11 Total Chlorine: B, HI96711‑11...
- Page 23 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 24 • 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 25 • 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 Standard Cuvettes, A and B are free of fingerprints or dirt and that they are inserted correctly.
- Page 26 • 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 27 • The instrument will return automatically to measurement mode by displaying dashes on the LCD. In GLP mode, the last user calibration date can be verified and the factory calibration can be restored. LAST CALIBRATION DATE To display the calibration date: •...
- Page 28 • Press READ /TIMER 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 indicates “donE” upon restoration of factory calibration prior to returning to measurement mode.
- 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 HI93701-01 Reagents for 100 free chlorine tests HI93701-03 Reagents for 300 free chlorine tests HI93711-01 Reagents for 100 total chlorine tests HI93711-03 Reagents for 300 total chlorine tests Other Accessories HI96701-11 CAL Check Standard Cuvettes for Free Chlorine (1 set) HI96711-11 CAL Check Standard Cuvettes for Total Chlorine (1 set)
- Page 31 If the repair is not covered by the warranty, you will be notified of the charges incurred. If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization Number from the Customer Service Department and then send it with shipment costs prepaid.
- 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 MAN96711 Printed in ROMANIA...
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