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INSTRUCTION MANUAL

HI97725

Free Chlorine,

Total Chlorine,

Cyanuric Acid & pH

Photometer

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Summary of Contents for HI97725

Page 1: ...INSTRUCTION MANUAL HI97725 Free Chlorine Total Chlorine Cyanuric Acid pH Photometer ...

Page 2: ...g a Hanna Instruments product Pleasereadthisinstructionmanualcarefullybeforeusingthisinstrument This manual will provide you with the necessary information for correct use of this instrument as well as a precise idea of its versatility 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 Dear Custome...

Page 3: ...3 6 4 GENERAL SETUP 14 6 5 REAGENTS ACCESSORIES 16 6 6 CONTEXTUAL HELP 17 6 7 BATTERY MANAGEMENT 17 7 PHOTOMETER 18 7 1 METHOD SELECTION 18 7 2 COLLECTING MEASURING SAMPLES AND REAGENTS 18 7 3 CUVETTE PREPARATION 19 8 METHOD PROCEDURE 20 8 1 FREE CHLORINE POWDER REAGENT 20 8 2 FREE CHLORINE LIQUID REAGENT 22 8 3 TOTAL CHLORINE POWDER REAGENT 25 8 4 TOTAL CHLORINE LIQUID REAGENT 27 8 5 CYANURIC ACI...

Page 4: ...al Chlorine Powder Liquid HI97710B CAL Check Cuvette B for pH HI97722B CAL Check Cuvette B for Cyanuric Acid Cloth for wiping cuvettes Scissors 1 5V AA Alkaline batteries CAL Check standard certificate Instrument quality certificate Instruction manual Each HI97725 is delivered in a cardboard box and is supplied with Sample cuvette 2 pcs Sample cuvette cap 2 pcs Plastic stopper 2 pcs 1 5V AA Alkali...

Page 5: ...tely and rinse with plenty of water If reagent contacts skin rinse the affected area thoroughly with water Avoid breathing released vapors Waste disposal For proper disposal of reagent kits and reacted samples contact a licensed waste disposal provider 3 ABBREVIATIONS mg L milligrams per liter ppm mL milliliter C degree Celsius F degree Fahrenheit EPA US Environmental Protection Agency GLP Good La...

Page 6: ...ment System Light source Light Emitting Diode Bandpass filter 525 nm Bandpass filter bandwidth 8 nm Bandpass filter wavelength accuracy 1 0 nm Light detector Silicon photocell Cuvette type Round 24 6 mm diameter 22 mm inside Additional Specifications Auto logging 50 readings Display 128 x 64 pixel B W LCD with backlight Auto off After 15 minutes of inactivity 30 minutes before a READ measurement B...

Page 7: ...sers step by step through the measurement process It includes all steps required for sample preparation the required reagents and quantities The HI97725 meter measures four important parameters in the treatment and disinfection of drinking water waste water and swimming pools Chlorine is a widely used disinfectant In order for chlorine to be effective the pH of the water should be less then pH 8 0...

Page 8: ...over Keypad Description The keypad contains 3 direct keys and 3 functional keys with the following functions Press the functional key to perform the function displayed above it on the LCD Press and hold to power off on Press briefly to return to the previous screen Press to access the menu screen Press to display the context sensitive help menu ...

Page 9: ...on may be absorbed by atoms molecules or crystal lattices Photometric chemical analysis is based on specific chemical reactions between a sample and reagent to produce a light absorbing compound If pure absorption occurs the fraction of light absorbed depends both on the optical path length through the matter and on the physical chemical characteristics of the substance according to the Lambert Be...

Page 10: ... luminous efficiency providing more light while using less power They also produce little heat which could otherwise affect electronic stability LEDs are available in a wide array of wavelengths whereas tungsten lamps have poor blue violet light output Improved optical filters ensure greater wavelength accuracy and allow a brighter stronger signal to be received The end result is higher measuremen...

Page 11: ...ettes from direct sunlight by keeping them in the original packing Store between 5 and 30 C 41 to 86 F do not freeze To perform a CAL Check 1 Press the key to enter menu Use the functional keys to select CAL Check Calibration and press Select The Not Available message or the date time and status of the last CAL Check will be displayed on the screen Note CAL Check Calibration is for the selected me...

Page 12: ... to continue The Please wait message will be displayed during the measurement 6 When the CAL Check is complete the display will show one of the following messages and the value obtained during the measurement PASSED The measured value is within the accuracy specification no user calibration is required OUT OF SPECIFICATION and Calibrate is available The measured value is near the expected value To...

Page 13: ... CAL Check press Clear and follow the prompts Press Yes to erase and return to the factory calibration data or No to exit the clear procedure 6 3 LOGGING DATA LOG RECALL The instrument features a data autolog function to help users keep track of all measurements Every time a measurement is made the data is automatically saved The data log can hold 50 individual measurements When the data log is fu...

Page 14: ...ght desired option Backlight Option 0 to 100 Press Modify to access the backlight intensity Use the functional keys to increase or decrease the value Press Accept to confirm or the key to return to the Setup menu without saving the new value Contrast Option 0 to 100 Press Modify to change the display s contrast Use the functional keys to increase or decrease the value Press Accept to confirm the v...

Page 15: ...tional keys to select the desired format Press Accept to confirm or the key to return to the Setup menu without saving the new format Decimal Separator Option Comma or Period Press the functional key to select the desired decimal separator The decimal separator is used on the measurement screen Language Press Modify to change the language Use the functional keys to select the desired language Pres...

Page 16: ...ep by step through the measurement procedure Meter Information Press Select to view the model serial number firmware version and selected language Press the key to return to the Setup menu Restore Factory Settings Press Select to reset to factory settings Press Accept to confirm or Cancel to exit without restoring the factory settings 6 5 REAGENTS ACCESSORIES Press the key to enter the menu Use th...

Page 17: ... to the previous screen 6 7 BATTERY MANAGEMENT The meter will perform an auto diagnostic test when it is powered on During this test the Hanna Instruments logo will appear on the LCD If the auto diagnostic test was successful the meter is ready for use The battery icon on the LCD will indicate the battery status battery full battery below 10 replace the batteries soon battery is low replace the ba...

Page 18: ...n the instrument is powered off 7 2 COLLECTING MEASURING SAMPLES AND REAGENTS Proper Use of Powder Packet 1 Use scissors to open the powder packet 2 Push the edges of the packet to form a spout 3 Pour out the content of the packet Proper Use of Dropper Bottle 1 Tap the dropper on the table several times and wipe the outside of the tip with a cloth 2 Always keep the dropper bottle in a vertical pos...

Page 19: ...cleaning cloth or a lint free wipe prior to insertion Shaking the cuvette can generate bubbles in the sample causinghigherreadings Toobtainaccuratemeasurements remove such bubbles by swirling or by gently tapping the cuvette Do not let the reacted sample stand too long after reagent has been added For best accuracy respect the timings described in the method It is possible to take multiple reading...

Page 20: ...cessories see ACCESSORIES section MEASUREMENT PROCEDURE Select the Free Chlorine Powder method using the procedure described in the METHOD SELECTION section Note If tutorial mode is disabled follow the measurement procedure below If the tutorial mode is enabled press Measure and follow the messages on the screen Fill the cuvette with 10 mL of unreacted sample up to the mark Replace the plastic sto...

Page 21: ... twice When the timer ends the meter will perform the reading The instrument displays the results in mg L of chlorine Cl2 INTERFERENCES Interference may be caused by Bromine Iodine Oxidized forms of Chromium and Manganese Ozone Hardness greater than 500 mg L CaCO3 to remove the interference shake the sample for approximately 2 minutes after adding the powder reagent Alkalinity greater than 250 mg ...

Page 22: ... see ACCESSORIES section MEASUREMENT PROCEDURE Select the Free Chlorine Liquid method using the procedure described in the METHOD SELECTION section Note If tutorial mode is disabled follow the measurement procedure below If the tutorial mode is enabled press Measure and follow the messages on the screen Fill the cuvette with 10 mL of unreacted sample up to the mark Replace the plastic stopper and ...

Page 23: ...e mark Replace the plastic stopper and the cap Shake gently to mix Insert the cuvette into the holder and ensure that the notch on the cap is positioned securely in the groove Press Read and the display will show a 1 minute countdown prior to the measurement To skip the timer press Read twice When the timer ends the meter will perform the reading The instrument displays the results in mg L of chlo...

Page 24: ...an 500 mg L CaCO3 to remove the interference shake the sample for approximately 2 minutes after adding the powder reagent Alkalinity greater than 250 mg L CaCO3 or acidity value greater than 150 mg L CaCO3 the color of the sample may develop only partially or rapidly fade to remove the interference neutralize the sample with diluted HCl or NaOH ...

Page 25: ...s see ACCESSORIES section MEASUREMENT PROCEDURE Select the Total Chlorine Powder method using the procedure described in the METHOD SELECTION section Note If tutorial mode is disabled follow the measurement procedure below If the tutorial mode is enabled press Measure and follow the messages on the screen Fill the cuvette with 10 mL of unreacted sample up to the mark Replace the plastic stopper an...

Page 26: ...wice When the timer ends the meter will perform the reading The instrument displays the results in mg L of chlorine Cl2 INTERFERENCES Interference may be caused by Bromine Iodine Oxidized forms of Chromium and Manganese Ozone Hardness greater than 500 mg L CaCO3 to remove the interference shake the sample for approximately 2 minutes after adding the powder reagent Alkalinity greater than 250 mg L ...

Page 27: ...s For other accessories see ACCESSORIES section MEASUREMENT PROCEDURE Select the Total Chlorine Liquid method using the procedure described in the METHOD SELECTION section Note If tutorial mode is disabled follow the measurement procedure below If the tutorial mode is enabled press Measure and follow the messages on the screen Fill the cuvette with 10 mL of unreacted sample up to the mark Replace ...

Page 28: ...Add 10 mL of unreacted sample up to the mark Replace the plastic stopper and the cap Shake gently to mix Insert the cuvette into the holder and ensure that the notch on the cap is positioned securely in the groove Press Read and the display will show a 2 minute 30 second countdown prior to the measurement To skip the timer press Read twice When the timer ends the meter will perform the reading The...

Page 29: ...han 500 mg L CaCO3 to remove the interference shake the sample for approximately 2 minutes after adding the powder reagent Alkalinity greater than 250 mg L CaCO3 or acidity greater than 150 mg L CaCO3 the color of the sample may develop only partially or may rapidly fade to remove the interference neutralize the sample with diluted HCl or NaOH ...

Page 30: ... the procedure described in the METHOD SELECTION section Note If tutorial mode is disabled follow the measurement procedure below If the tutorial mode is enabled press Measure and follow the messages on the screen Fill the first cuvette with 10 mL of unreacted sample up to the mark Replace the plastic stopper and the cap Insert the cuvette into the holder and ensure that the notch on the cap is po...

Page 31: ...e up to the mark Replace the plastic stopper and the cap Insert the cuvette into the holder and ensure that the notch on the cap is positioned securely in the groove Press Read and the display will show a 45 second countdown prior to the measurement To skip the timer press Read twice When the timer ends the meter will perform the reading The instrument displays the results in mg L of cyanuric acid...

Page 32: ...d in the METHOD SELECTION section Note If tutorial mode is disabled follow the measurement procedure below If the tutorial mode is enabled press Measure and follow the messages on the screen Fill the cuvette with 10 mL of unreacted sample up to the mark Replace the plastic stopper and the cap Insert the cuvette into the holder and ensure that the notch on the cap is positioned securely in the groo...

Page 33: ...ndicator Replace the plastic stopper and the cap Swirl to mix the solution Insert the cuvette into the holder and ensure that the notch on the cap is positioned securely in the groove Press Read and the meter will perform the reading The instrument displays the results in pH 5 ...

Page 34: ...d the zero cuvettes are inverted Swap the cuvettes and repeat the measurement There is either too much light or the instrument can not adjust the light level Please check the preparation of the zero cuvette and that the sample does not contain any debris The meter is either overheating or its temperature has dropped too low to operate within published accuracy specifications The meter must be betw...

Page 35: ...he meter If the issue persists please contact Hanna Instruments technical support Battery level is too low for the meter to function properly Replace the batteries with new ones Tutorial mode has been enabled in the Setup menu Press Continue and follow the prompt on the screen Tutorial mode can be disabled in the Setup menu A critical error has occurred Restart the meter If the issue persists plea...

Page 36: ...ent s batteries follow these steps Turn the instrument off by pressing and holding the key Remove the battery cover by turning it counterclockwise Remove the old batteries replace them with three new 1 5V AA batteries Replace the battery cover turn it clockwise to close ...

Page 37: ... tests powder HI93722 01 Cyanuric Acid Reagent 100 tests HI93722 03 Cyanuric Acid Reagent 300 tests 11 2 OTHER ACCESSORIES Code Description HI7101414 blue carrying case for HI977xx and 4 CAL Check cuvettes HI731318 cloth for wiping cuvettes 4 pcs HI731331 glass cuvette 4 pcs HI731336N cap for glass cuvette 4 pcs HI740034P cap for 100 mL beaker 10 pcs HI740036P 100 mL plastic beaker 10 pcs HI93703 ...

Page 38: ...t in which it is used Any variation introduced by the user to the supplied equipment may degrade the meter s performance For yours and the meter s safety do not use or store the meter in hazardous environments WARRANTY The HI97725 is warranted for two years against defects in workmanship and materials when used for its intended purpose and maintained according to instructions This warranty is limi...

Page 39: ...Hanna Instruments reserves the right to modify the design construction or appearance of its products without advance notice ...

Page 40: ...World Headquarters Hanna Instruments Inc Highland Industrial Park 584 Park East Drive Woonsocket RI 02895 USA www hannainst com MAN97725 Printed in ROMANIA ...

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