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Summary of Contents for Hanna Instruments HI96761C
- Page 1 HI96761C Total Chlorine Meter for the Analysis of Trace Total Chlorine Concentrations...
- 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 HI96761 Ion Selective Meter is supplied complete with: • Sample Cuvettes and Caps (2 pcs.) •...
- Page 5 HI96761 is an auto diagnostic portable microprocessor meter that benefits from Hanna Instruments’ years of experience as a manufacturer of analytical instruments. It has an advanced optical system based on a special tungsten lamp and a narrow band interference filter that allows most accurate and repeatable readings.
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Page 6: Required Reagents
Range 0.000 to 0.500 mg/L Resolution 0.001 mg/L Accuracy ±0.020 mg/L ±3% of reading @25 °C (77 °F) Light Source Tungsten lamp Light Detector Silicon Photocell with narrow band interference filter @525 nm Adaptation of the Standard Method 4500‑Cl G. The reaction between Method the chlorine and the DPD reagent causes a pink tint in the sample. - 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 colorimeter is based on special subminiature tungsten lamps and narrow‑band interference filters to guarantee both high performance and reliable results. HI96 series block diagram (optical layout) A microprocessor controlled special tungsten lamp emits radiation which is first optically conditioned and beamed to the sample contained in the cuvette.
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Page 9: Instrument Description
INSTRUMENT DESCRIPTION 1) 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 shows the charging level of the battery 4) The hourglass appears when an internal checking 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 No Light:The instrument cannot adjust the light level. Please check that the sample does not contain any debris. b) on sample reading Inverted cuvettes: The sample and the zero cuvette are inverted. Zero: A zero reading was not taken. Follow the instructions of the measurement procedure for zeroing the meter.
- Page 12 d) other errors and warnings Cap error: Appears when external light enters in the analysis cell. Assure that the cuvette cap is present. 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.
- 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 • 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 15 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. • Turn the meter on by pressing ON/OFF. The display briefly shows all tags on. •...
- Page 16 • 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. •...
- Page 17 • 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. 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 18 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. • Turn the meter on by pressing ON/OFF.
- Page 19 • 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 HI96761‑11 Cuvette B into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove. •...
- Page 20 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 21 • 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. •...
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Page 22: 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 HI96761-11 Cuvettes, A and B are free of fingerprints or dirt and that they are inserted correctly. - Page 23 • Press 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. •...
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Page 24: 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 GLP/ to enter GLP mode. The calibration month and day will appear on the main display and the year on the secondary display. - Page 25 • Press ZERO/CFM to restore the factory calibration or press 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 26 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. •...
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Page 27: 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 28 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 MAN96761 Printed in ROMANIA...
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