Hanna Instruments HI97725 Instruction Manual
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Hanna Instruments HI97725 Instruction Manual

Free chlorine, total chlorine, cyanuric acid & ph photometer
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HI97725
Free Chlorine,
Total Chlorine,
Cyanuric Acid & pH
Photometer

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Summary of Contents for Hanna Instruments HI97725

  • Page 1 HI97725 Free Chlorine, Total Chlorine, Cyanuric Acid & pH Photometer...
  • 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: Table Of Contents

    TABLE OF CONTENTS 1. PRELIMINARY EXAMINATION ................4 2. SAFETY MEASURES ..................5 3. ABBREVIATIONS ................... 5 4. SPECIFICATIONS .................... 6 5. DESCRIPTION ....................7 5.1. GENERAL DESCRIPTION & INTENDED USE ..........7 5.2. FUNCTIONAL DESCRIPTION ..............8 5.3. PRECISION & ACCURACY ............... 9 5.4.

  • Page 4: Preliminary Examination

    1. PRELIMINARY EXAMINATION Remove the instrument and accessories from the packaging and examine it carefully. For further assistance, please contact your local Hanna Instruments Office or email us at tech@hannainst.com. Each HI97725C is delivered in a rugged carrying case and is supplied with: •...

  • Page 5: Safety Measures

    2. SAFETY MEASURES • The chemicals contained in the reagent kits may be hazardous if improperly handled. • Read the Safety Data Sheets (SDS) before performing tests. • Safety equipment: Wear suitable eye protection and clothing when required, and follow instructions carefully. •...

  • Page 6: Specifications

    4. SPECIFICATIONS Range 0.00 to 5.00 mg/L (as Cl Resolution 0.01 mg/L Chlorine Accuracy ±0.03 mg/L ±3% of reading at 25 °C (All Methods) Adaptation of US EPA Method 330.5, DPD Method Colori metric Method Range 0 to 80 mg/L (as CYA) Resolution 1 mg/L Cyanuric Acid...

  • Page 7: Description

    With the CAL Check™ functionality, users are able to validate the performance of the instrument at any time and apply a user calibration (if necessary). Hanna Instruments CAL Check cuvettes are made with NIST traceable standards.

  • Page 8: Functional Description

    5.2. FUNCTIONAL DESCRIPTION 1. ON/OFF power button 3. Liquid Crystal Display (LCD) 5. Indexing mark 2. Keypad 4. Cuvette holder 6. Battery cover 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.

  • Page 9: Precision & Accuracy

    5.3. PRECISION & ACCURACY Precision is how closely repeated measurements are to one another. Precision is usually expressed as standard deviation (SD). Accuracy is defined as the closeness of a test result to the true value and is method specific. Although good precision suggests good accuracy, precise results can be inaccurate.

  • Page 10: Optical System

    5.5. OPTICAL SYSTEM Instrument Block Diagram The internal reference system (reference detector) of the HI97725 photometer compensates for any drifts due to power fluctuations or ambient temperature changes, providing a stable source of light for your blank (zero) measurement and sample measurement.

  • Page 11: General Operations

    6. GENERAL OPERATIONS 6.1. METER VALIDATION: CAL CHECK & CALIBRATION Validation of the HI97725 involves verifying the concentration of the certified CAL Check standards. The CAL Check screen guides the user step-by-step through the validation process and user calibration (if necessary).
  • Page 12 4. Insert the A ZERO CAL Check Cuvette A then press Next to continue. The “Please wait...“ message will be displayed during the measurement. 5. Insert the CAL Check Cuvette B for the selected method (HI97701B for Free and Total Chlorine, HI97722B for Cyanuric Acid or HI97710B...

  • Page 13: Glp

    Check the certified value, expiration date and clean the outside of the cuvette. Repeat the CAL Check procedure. If this error continues contact your nearest Hanna Instruments Customer Service Center. 6.2. GLP Press the key to enter the menu.

  • Page 14: General Setup

    Press Delete to erase logged data. After pressing Delete a prompt on display is asking for confirmation. Press No or the key to return to the previous screen. Press Yes to delete selected log. Press Del All to erase all the logged data. If Del All is pressed follow the prompt to confirm.
  • Page 15 Press Accept to confirm or the key to return to the previous screen. Time Format Option: AM/PM or 24-hour Press the functional key to select the desired time format. Date Format Press Modify to change the date format. Use the functional keys to select the desired key to return to the Setup menu without format.

  • Page 16: Reagents & Accessories

    Beeper Option: Enable or Disable When enabled, a short beep is heard every time a key is pressed. A long beep alert sounds when the pressed key is not active or an error is detected. Press the functional key to enable or disable the beeper. Tutorial Option: Enable or Disable When enabled, the user will be guided step-by-step through the measurement...

  • Page 17: Contextual Help

    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: •...

  • Page 18: Photometer

    7. PHOTOMETER 7.1. METHOD SELECTION Press Methods when in measurement mode to access the list of methods. Use the functional keys to highlight the desired method then press Select. The selected method will be saved when the instrument is powered off. 7.2.

  • Page 19: Cuvette Preparation

    7.3. CUVETTE PREPARATION Proper mixing is very important for reproducibility of the measurements. The proper mixing technique is listed in the method procedure. (a) The mixing method is indicated with “shake gently“ using one of the following icons: (b) The mixing method is indicated with “swirl“ using one of the following icons: In order to avoid reagent leaking and to obtain more accurate measurements, close the cuvette first with the supplied HDPE plastic stopper...

  • Page 20: Method Procedure

    8. METHOD PROCEDURE 8.1. FREE CHLORINE (POWDER REAGENT) Note: Free and Total Chlorine have to be measured separately with fresh unreacted samples, following the related procedures, if both values are desired. REQUIRED REAGENTS Code Description Quantity HI93701-0 Free Chlorine Reagent 1 packet REAGENT SETS HI93701-01...
  • Page 21 • Remove the cuvette. • Add the content of one packet of HI93701-0 Free Chlorine Reagent. Replace the plastic stopper and the cap. Shake gently for 20 seconds. • Insert the cuvette into the holder and ensure that the notch on the cap is positioned securely in the groove.

  • Page 22: Free Chlorine (Liquid Reagent)

    8.2. FREE CHLORINE (LIQUID REAGENT) Note: Free and Total Chlorine have to be measured separately with fresh unreacted samples, following the related procedures, if both values are desired. REQUIRED REAGENTS Code Description Quantity HI93701A-F Free Chlorine Reagent A 3 drops HI93701B-F Free Chlorine Reagent B 3 drops REAGENT SETS...
  • Page 23 • Remove the cuvette. • To an empty cuvette add 3 drops of ×3 ×3 HI93701A-F Free Chlorine Reagent A and 3 drops of HI93701B-F Free Chlorine Reagent B. • Swirl gently to mix. • Add 10 mL of unreacted sample (up to the 10 mL mark).
  • Page 24 INTERFERENCES Interference may be caused by: • Bromine, Iodine, Oxidized forms of Chromium and Manganese, Ozone • Hardness greater than 500 mg/L CaCO , to remove the interference shake the sample for approximately 2 minutes after adding the powder reagent •...

  • Page 25: Total Chlorine (Powder Reagent)

    8.3. TOTAL CHLORINE (POWDER REAGENT) Note: Free and Total Chlorine have to be measured separately with fresh unreacted samples, following the related procedures, if both values are desired. REQUIRED REAGENTS Code Description Quantity HI93711-0 Total Chlorine Reagent 1 packet REAGENT SETS HI93711-01 Total Chlorine Reagent - 100 tests HI93711-03...
  • Page 26 • Remove the cuvette. • Add 1 packet of HI93711-0 Total Chlorine Reagent. Replace the plastic stopper and the cap. Shake gently for 20 seconds. • Insert the cuvette into the holder and ensure that the notch on the cap is positioned securely in the groove.

  • Page 27: Total Chlorine (Liquid Reagent)

    8.4. TOTAL CHLORINE (LIQUID REAGENT) Note: Free and Total Chlorine have to be measured separately with fresh unreacted samples, following the related procedures, if both values are desired. REQUIRED REAGENTS Code Description Quantity HI93701A-T Total Chlorine Reagent A 3 drops HI93701B-T Total Chlorine Reagent B 3 drops HI93701C-T...
  • Page 28 • Remove the cuvette. • To an empty cuvette add 3 drops of HI93701A-T Total Chlorine Reagent A, ×3 ×3 ×1 3 drops of HI93701B-T Total Chlorine Reagent B, and 1 drop of HI93701C-T Total Chlorine Reagent C. • Replace the plastic stopper and the cap.
  • Page 29 INTERFERENCES Interference may be caused by: • Bromine, Iodine, Oxidized forms of Chromium and Manganese, Ozone • Hardness greater than 500 mg/L CaCO , to remove the interference shake the sample for approximately 2 minutes after adding the powder reagent •...

  • Page 30: Cyanuric Acid

    8.5. CYANURIC ACID REQUIRED REAGENTS Code Description Quantity HI93722-0 Cyanuric Acid Reagent 1 packet REAGENT SETS HI93722-01 Cyanuric Acid Reagent - 100 tests HI93722-03 Cyanuric Acid Reagent - 300 tests For other accessories see ACCESSORIES section. MEASUREMENT PROCEDURE • Select the Cyanuric Acid method using the procedure described in the METHOD SELECTION section.
  • Page 31 • Remove the cuvette. • Fill a beaker with 25 mL sample (up to the mark). • Add one packet of HI93722-0 Cyanuric Acid Reagent and mix to dissolve. • Fill a second cuvette with 10 mL of the reacted sample (up to the mark).
  • Page 32 8.6. pH REQUIRED REAGENTS Code Description Quantity HI93710-0 pH Reagent 5 drops REAGENT SETS HI93710-01 pH Reagent - 100 tests HI93710-03 pH Reagent - 300 tests For other accessories see ACCESSORIES section. MEASUREMENT PROCEDURE • Select the method using the procedure described in the METHOD SELECTION section.
  • Page 33 • Remove the cuvette. • Add 5 drops of HI93710-0 pH Reagent indicator. Replace the plastic stopper and ×5 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.

  • Page 34: Warning & Error Descriptions

    Ensure that the notch on the cap is positioned securely in the groove before performing any measurements. If the issue persists, please contact Hanna Instruments technical support. The sample and the zero cuvettes are inverted. Swap the cuvettes and repeat the measurement.
  • Page 35 English is the only available language. Help function is not available. Restart the 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.

  • Page 36: Battery Replacement

    10. BATTERY REPLACEMENT To replace the instrument’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. •...

  • Page 37: Accessories

    11. ACCESSORIES 11.1. REAGENT SETS Code Description HI93701-01 Free Chlorine Reagent - 100 tests (powder) HI93701-03 Free Chlorine Reagent - 300 tests (powder) HI93701-F Free Chlorine Reagent - 300 tests (liquid) HI93701-T Total Chlorine Reagent - 300 tests (liquid) HI93710-01 pH Reagent - 100 tests HI93710-03 pH Reagent - 300 tests...

  • Page 38: Certification

    If the repair is not covered by the warranty, you will be notified of the charges incurred. If the meter is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization (RGA) number from the Technical Service department and then send it with shipping costs prepaid.
  • 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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