Hanna Instruments HI 88703 Instruction Manual
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Hanna Instruments HI 88703 Instruction Manual

Turbidity meter
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Instruction Manual
HI 88703
Turbidity Meter
w w w. h a n n a i n s t . c o m
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Summary of Contents for Hanna Instruments HI 88703

  • Page 1 Instruction Manual HI 88703 Turbidity Meter w w w. h a n n a i n s t . c o m...

  • Page 2: Table Of Contents

    Dear Customer, Thank you for choosing a Hanna Instruments product. This manual will provide you with the necessary information for correct use of the instrument. Please read this instruction manual carefully before using the instrument. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com or see the back side of this manual for our worldwide sales and technical service contacts.

  • Page 3: Preliminary Examination

    PRELIMINARY EXAMINATION PRELIMINARY EXAMINATION PRELIMINARY EXAMINATION PRELIMINARY EXAMINATION PRELIMINARY EXAMINATION Please examine this Product carefully. Make sure the instrument is not damaged. If any damage has occurred during the shipment, please notify your dealer. This HI 88703 Bench Turbidity meter is supplied complete with: •...

  • Page 4: Abbreviations

    HI 88703 has complete G.L.P. (Good Laboratory Practice) functions that allows traceability of the calibration conditions. The last calibration points, time and date can be checked. HI 88703 has a user-friendly interface with an easy to understand, graphical LCD. All messages are in plain text, easy to read and understand.
  • Page 5 For the ratio turbidimeter range, the microprocessor of the instrument calculates the NTU value, from the signals that reaches the two detectors, by using an effective algorithm. This algorithm corrects and compensates for interferences of color, making the HI 88703 instrument color-compensated. The optical system and measuring technique compensate also for the lamp intensity fluctuations, minimizing the need of frequent calibration.

  • Page 6: Functional Description

    FUNCTIONAL DESCRIPTION FUNCTIONAL DESCRIPTION FUNCTIONAL DESCRIPTION FUNCTIONAL DESCRIPTION FUNCTIONAL DESCRIPTION INSTRUMENT DESCRIPTION 1) Liquid Crystal Display (LCD). The LCD has backlight for better visibility in dark environments. 2) Keypad. Splash proof resistant. 3) Cuvet Lid. Close the cuvet lid prior to start a measurement. 4) Lamp lid and the related fixing screw 5) USB connector 6) Fuse holder...
  • Page 7 DISPLAY DESCRIPTION The display contains the following fields: 1) The current time in selected format 2) Information related to the measurement 3) Functional keys 4) Currently selected parameters 5) Measuring units 6) Measured value KEYBOARD DESCRIPTION The keyboard contains 8 direct keys and 3 functional keys with the following functions: The function of each of the three functional keys depends on the name displayed on the LCD above them.

  • Page 8: Specifications

    SPECIFICATIONS SPECIFICATIONS SPECIFICATIONS SPECIFICATIONS SPECIFICATIONS Range - non ratio mode 0.00 to 9.99; 10.0 to 40.0 NTU 0.0 to 99.9; 100 to 268 Nephelos 0.00 to 9.80 EBC Resolution - non ratio mode 0.01; 0.1 NTU 0.1; 1 Nephelos 0.01 EBC Range - ratio mode 0.00 to 9.99;...

  • Page 9: General Tips For An Accurate Measurement

    GENERAL TIPS FOR AN ACCURATE MEASUREMENT GENERAL TIPS FOR AN ACCURATE MEASUREMENT GENERAL TIPS FOR AN ACCURATE MEASUREMENT GENERAL TIPS FOR AN ACCURATE MEASUREMENT GENERAL TIPS FOR AN ACCURATE MEASUREMENT HI 88703 is a highly accurate combined meter for turbidity and free & total chlorine. To meet the instrument’s performance and fully benefit of its features, it is very important for the analyst to use proper measurement techniques for accurate, precise and repeatable readings.
  • Page 10 If the cuvet is not indexed, put the cuvet with the factory mark aligned with the sign on the instrument top. CUVET OILING To hide minor imperfections and scratches, the cuvets should be oiled outside with the supplied silicone oil. This is very important, especially for low turbidity samples (<...
  • Page 11 For indexing one cuvet or matching multiple cuvets, the continuous reading mode is suggested. In this mode multiple successive readings are taken without turning off the lamp. The turbidity is immedi- ately displayed, reducing considerably the measurement time. Note: The instrument can not perform continuous readings if the average mode is on. In order to index a cuvet follow the next steps: •...
  • Page 12 • Mark this position on the thicker white band on the top of the cuvet with a water resistant pencil. • Always use this position to align it with the sign on the instrument top. MATCHING MULTIPLE CUVETS Precise measurements require the use of a single cuvet. If it is not possible, cuvet selection and matching must be performed before taking measurements.
  • Page 13 • Insert the second cuvet into the instrument and take a reading. • Open the instrument lid, slightly rotate the cuvet and take a new reading. • Repeat the last step for the second cuvet until the reading is within 0.01 NTU of the value obtained for the first cuvet.
  • Page 14 • Use of an ultrasonic bath; • Heating the sample. Sometimes it is necessary to combine two or more methods for efficient air bubble removal. Note: Each method can alter the sample turbidity, if misused, so they have to be used with caution. APPLICATION OF VACUUM Vacuum works by decreasing the atmospheric pressure.

  • Page 15: Start Up

    an ultrasonic bath. Follow the degassing procedure described above. Only after the degassing procedure is finished the cuvet can be capped. HEATING THE SAMPLE Use of heat to remove air bubbles, although very effective in some cases, should be handled with care because it can alter the turbidity of the sample.

  • Page 16: Range Selection

    RANGE SELECTION RANGE SELECTION RANGE SELECTION RANGE SELECTION RANGE SELECTION The HI 88703 instrument has two measuring ranges: Ratio Turbidity, Non Ratio Turbidity. When the instrument is in the main screen, the selected range is displayed in the right side of the LCD, on the message line.

  • Page 17: Help Mode

    H E L P M O D E H E L P M O D E H E L P M O D E H E L P M O D E H E L P M O D E The HI 83414 offers an interactive context help mode that assists the user at any moment.
  • Page 18 • Wipe the cuvet thoroughly with a lint-free cloth to remove any fingerprints, dirt or water spots. • Apply silicone oil on the cuvet and wipe with a lint-free cloth to obtain an even film over the entire surface of the cuvet. Note: It is very important to oil the cuvet, espe- cially for low turbidity values (<...
  • Page 19 • Press “Read” functional key and keep it pressed to take continuous readings. The display will show “READ” in the left side and blinking dashes. The dashes and lamp icon will appear during different measurement phases. The first value is displayed after 10 seconds and then a new reading is displayed each second as long as the “Read”...

  • Page 20: Calibration Procedure For Ratio/Non Ratio Turbidity Range

    EPA MODE To round the readings as EPA specifications press the “EPA” functional key. The EPA text is displayed on the left side of the LCD and the reading is rounded as follows: n u o t s e r - 0 .
  • Page 21 FORMAZIN PREPARATION In order to prepare formazin 4000 NTU stock solution, follow the next procedure: Solution I : Dissolve 1.000 grams of hydrazine sulfate, (NH , in distilled, deionized water and dilute to 100 mL in a volumetric flask. Warning: Handle hydrazine sulfate with care because it is a carcinogen reagent. Avoid inhalation, ingestion, or skin contact.
  • Page 22 Note: The reading of the first point colud be skipped by pressing “Skip” functional key. In this case, the 0.00 NTU point will be used for calibration. • Place the <0.1 NTU standard cuvet (or the cuvet with dilution water) into the holder and ensure that the cuvet mark is aligned with the sign on the instrument top.
  • Page 23 THREE-POINT CALIBRATION (Ratio Turbidity only) To perform a three-point calibration, continue the procedure with the following steps: • Remove the second standard cuvet. • Place the 100 NTU standard cuvet (or the third prepared formazin standard) into the holder, with the cuvet mark aligned to the sign on the instrument top.
  • Page 24 FIVE-POINT CALIBRATION (Ratio Turbidity only) To perform a five-point calibration, continue the procedure with the following steps: • Remove the fourth standard cuvet. • Place the 2000 NTU standard cuvet (or the fourth prepared formazin standard) into the holder, with the cuvet mark aligned to the sign on the instrument top.

  • Page 25: Good Laboratory Practice (Glp)

    GOOD LABORATORY PRACTICE (GLP) GOOD LABORATORY PRACTICE (GLP) GOOD LABORATORY PRACTICE (GLP) GOOD LABORATORY PRACTICE (GLP) GOOD LABORATORY PRACTICE (GLP) The HI 88703 has built in complete GLP information. The calibration date and the calibration points are displayed in a comprehensive mode for each range. To display the GLP information, simply press CAL key.

  • Page 26: Log & Log Recall

    LOG AND LOG RECALL LOG AND LOG RECALL LOG AND LOG RECALL LOG AND LOG RECALL LOG AND LOG RECALL The HI 88703 has a powerful log function that could store up to 200 records. Each record contains: • the measuring range, •...

  • Page 27: Setup

    S E T U P S E T U P S E T U P S E T U P S E T U P In the Setup mode, the instrument’s parameters, could be changed. Some parameters affect the measuring sequence and others are general parameters that change the behaviour or appearence of the instrument.
  • Page 28 Date / Time This option is used to set the instrument’s date and time. Press “Modify” to change the date/time. Press “Left” or ”Right” functional keys to highlight the value to be modified (year, month, day, hour, minute or second). Use the UP or DOWN keys to change the value. Press “Accept”...
  • Page 29 Beep On Option: Enabled or Disabled. This option is used to enable/disable the beeper. Press the “Enable” functional key to enable or disable this option. 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 a error condition is detected.

  • Page 30: Lamp Replacement

    L A M P R E P L A C E M E N T L A M P R E P L A C E M E N T L A M P R E P L A C E M E N T L A M P R E P L A C E M E N T L A M P R E P L A C E M E N T The instrument tungsten lamp has a life longer than 100,000 measurements.

  • Page 31: Accessories

    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. When shipping any instrument, make sure it is properly packaged for complete protection.
  • Page 32 SALES AND TECHNICAL SERVICE CONTACTS SALES AND TECHNICAL SERVICE CONTACTS SALES AND TECHNICAL SERVICE CONTACTS SALES AND TECHNICAL SERVICE CONTACTS SALES AND TECHNICAL SERVICE CONTACTS Australia: Tel. (03) 9769.0666 • Fax (03) 9769.0699 China: Tel. (10) 88570068 • Fax (10) 88570060 Egypt: Tel.

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