Instruction Manual HI 96710C pH & Chlorine ISM www.hannainst.
Dear Customer, Thank you for choosing a Hanna product. This manual will provide you with the necessary information for the correct use of the instrument. Please read it carefully before using the meter. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com. TABLE OF CONTENTS PRELIMINARY EXAMINATION ................................................................................................ 3 GENERAL DESCRIPTION .................................................
PRELIMINARY EXAMINATION Please examine this product carefully. Make sure that the instrument is not damaged. If any damage occurred during shipment, please notify your Dealer.
GENERAL DESCRIPTION The HI 96710 is an auto diagnostic portable microprocessor meter that benefits from Hanna’s 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. All instruments are factory calibrated and the electronic and optical design minimizes the need of frequent calibration.
SPECIFICATIONS pH 6.5 to 8.5 Free Chlorine 0.00 to 5.00 mg/L Total Chlorine 0.00 to 5.00 mg/L Resolution 0.1 pH 0.01 mg/L under 3.50 mg/L Chlorine 0.10 mg/L above 3.50 mg/L Chlorine Accuracy pH ±0.1 pH @ 25°C Free Chlorine ±0.03 mg/L ±3% of reading @ 25°C Total Chlorine ±0.03 mg/L ±3% of reading @ 25°C Typical EMC Deviation ±0.1 pH ±0.01 mg/L Chlorine Light Source Tungsten lamp Light Detector Silicon Photocell with narrow band interference filter @ 525 nm Method For pH: Phenol red method.
PRECISION AND ACCURACY 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. In a laboratory using a standard solution of 7.0 pH and a representative lot of reagent, an operator obtained with a single instrument a standard deviation of 0.
Therefore, the concentration "c" can be calculated from the absorbance of the substance as the other factors are known. Photometric chemical analysis is based on the possibility to develop an absorbing compound from a specific chemical reaction between sample and reagents. Given that the absorption of a compound strictly depends on the wavelength of the incident light beam, a narrow spectral bandwidth should be selected as well as a proper central wavelength to optimize measurements.
FUNCTIONAL DESCRIPTION INSTRUMENT DESCRIPTION 1) 2) 3) 4) 5) 6) 7) 8) RANGE/GLP/ key CAL CHECK key ZERO/CFM key READ/ /TIMER key ON/OFF key Liquid Crystal Display (LCD) Cuvette alignment indicator Cuvette holder KEYPAD DESCRIPTION • ON/OFF: to turn the meter on and off. • ZERO/CFM: this is a bi-functional key. Just press to zero the meter prior to measurement, or to confirm edited values. In calibration mode press to confirm factory calibration restore. • READ/ /TIMER: this is a multi-functional key.
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 8) Four digit main display 9) Measuring units 10) Four digit secon
ERRORS AND WARNINGS 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. Light Low: There is not enough light to perform a measurement. Please check the preparation of the zero cuvette. No Light: The instrument cannot adjust the light level.
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. d) other errors and warnings Cap error: Appears when external light enters in the analysis cell. Assure that the cuvette cap is present.
GENERAL TIPS FOR AN ACCURATE MEASUREMENT 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.
• Whenever the cuvette is placed into the measurement cell, it must be dry outside, and completely free of fingerprints, oil or dirt. Wipe it thoroughly with HI 731318 or a lint-free cloth prior to insertion. • 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.
RANGE SELECTION The HI 96710 can measure pH when range P1 is selected, Free Chlorine when range P2 is selected or Total Chlorine when range P3 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. • After startup, the range identification number is displayed on the secondary LCD as P1, P2 or P3. Code P1 P2 P3 Parameter pH Free Chlorine Total Chlorine • Press RANGE/GLP/ to change the range.
• When the beeper sounds briefly and the LCD displays dashes, the meter is ready. The blinking “ZERO” indicates that the instrument needs to be zeroed first. • Pay attention to the selected range. To change the range, simply press RANGE/GLP/ . pH MEASUREMENT • Fill the cuvette with 10 mL of unreacted sample, up to the mark, and replace the cap. • Place the cuvette into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove.
• Press READ/ /TIMER. The lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. • The instrument directly displays the pH measured value on the Liquid Crystal Display. FREE CHLORINE MEASUREMENT • Fill the cuvette up to the mark with 10 mL of unreacted sample and replace the cap. • Place the cuvette into the holder and ensure that the notch on the cap is positioned securely into the groove.
• Replace the cuvette into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove. • Press and hold READ/ /TIMER for three seconds. The display will show the countdown prior to measurement. An audible “beep” indicates the end of the countdown period. • Alternatively, wait for one minute and just press READ/ /TIMER. In both cases, the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase.
TOTAL CHLORINE MEASUREMENT • Fill the cuvette up to the mark with 10 mL of unreacted sample and replace the cap. • Place the cuvette into the 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. • After a few seconds, the display will show “-0.0-”. The meter is now zeroed and ready for measurement.
• 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. • The instrument directly displays the concentration in mg/L of total chlorine on the Liquid Crystal Display. INTERFERENCES Interference may be caused by: Bromine Iodine Chlorine Dioxide Ozone Oxidized manganese and Chromium.
VALIDATION PROCEDURE 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 CAL CHECKTM 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. • Turn the meter on by pressing ON/OFF.
• Press CAL CHECK 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 CHECKTM Standard Certificate. If the value is found out of the specifications, please check that the cuvettes are free of fingerprints, oil or dirt and repeat validation.
• 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. • Remove the cuvette. • Place the corresponding CAL CHECKTM Standard Cuvette B into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove.
DATE INPUT • Press RANGE/GLP/ to edit the desired year (2009-2099). If the key is kept pressed, the year number is automatically increased. or • When the correct year has been set, press ZERO/CFM or READ/ /TIMER to confirm. Now the display will show the month blinking. • Press RANGE/GLP/ to edit the desired month (01-12). If the key is kept pressed, the month number is automatically increased. or • When the correct month has been set, press ZERO/CFM or READ/ /TIMER to confirm.
• The instrument will return automatically to measurement mode by displaying dashes on the LCD. GLP In the 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: • Press RANGE/GLP/ to enter GLP mode. The calibration month and day will appear on the main display and the year on the secondary display. • If no calibration was performed, the factory calibration message, “F.
BATTERY MANAGEMENT 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.
ACCESORIES REAGENT SET HI 93701-01 HI 93701-03 HI 93710-01 HI 93710-03 HI 93711-01 HI 93711-03 Reagents for 100 free chlorine tests Reagents for 300 free chlorine tests Reagents for 100 pH tests Reagents for 300 pH tests Reagents for 100 total chlorine tests Reagents for 300 total chlorine tests OTHER ACCESORIES HI 96701-11 CAL CHECKTM Standard Cuvettes for Free Chlorine (1 set) HI 96710-11 CAL CHECKTM Standard Cuvettes for pH (1 set) HI 96711-11 CAL CHECKTM Standard Cuvettes for Total Chlorine (1 set) HI
WARRANTY HI 96710 is warranted for two years against defects in workmanship and materials when used for its intended purpose and maintained according to the instructions. This warranty is limited to repair or replacement free of charge. Damages due to accident, misuse, tampering or lack of prescribed maintenance are not covered. If service is required, contact your dealer. If under warranty, report the model number, date of purchase, serial number and the nature of the failure.
Hanna Instruments Inc. Highland Industrial Park 584 Park East Drive Woonsocket, RI 02895 USA Technical Support for Customers Tel. (800) 426 6287 Fax (401) 765 7575 E-mail tech@hannainst.com www.hannainst.
