Hanna-instruments HI 88703 Manuale Utente

1HI 88703Turbidity MeterInstruction Manualwww.hannainst.com

10Note: If you are using multiple cuvettes, always match the cuvettes.CUVETTE HANDLINGThe cuvettes should be free of scratches or cracks. Any cuvette

11If the cuvette is not indexed, put the cuvette with the factory mark aligned with the sign on theinstrument top.CUVETTE OILINGTo hide minor imperfec

12For indexing one cuvette or matching multiple cuvettes, the continuous reading mode is suggested.In this mode multiple successive readings are taken

13• Mark this position on the thicker white band onthe top of the cuvette with a water resistantpencil.• Always use this position to align it with the

14• Insert the second cuvette into the instrumentand take a reading.• Open the instrument lid, slightly rotate thecuvette and take a new reading.• Rep

15Sometimes it is necessary to combine two or more methods for efficient air bubble removal.Note: Each method can alter the sample turbidity, if misus

16START UPThe HI 88703 Turbidity bench is supplied with all necessary accesories for making measurements.Unpack the instrument and place it on a flat

17RANGE SELECTIONThe HI 88703 instrument has two measuringranges: Ratio Turbidity, Non Ratio Turbidity. Whenthe instrument is in the main screen, the

18HELP MODEThe HI 88703 offers an interactive context help mode that assists the user at any moment.To access help screens, just press HELP.Depending

19NORMAL MEASUREMENTThis type of measurement is best suited for regular readings, when the sample is stable and normalaccuracy is required. In normal

2Dear Customer,Thank you for choosing a Hanna Instruments product.Please read this instruction manual carefully before using this instrument.This manu

20• Press the Read key to take the measurement.The display will show “READ” in the left side andblinking dashes. The icon for lamp will appearduring

21CALIBRATION PROCEDURE FOR RATIO /NON RATIO TURBIDITY RANGEHI 88703 has a powerful calibration function that compensates for lamp aging or changing.

22FORMAZIN PREPARATIONIn order to prepare formazin 4000 NTU stock solution, follow the next procedure:Solution I : Dissolve 1.000 grams of hydrazine s

23Note:The reading of the first point colud be skipped by pressing the Skip key. In this case, the0.00 NTU point will be used for calibration.• Place

24THREE-POINT CALIBRATION (Ratio Turbidity only)To perform a three-point calibration, continue the procedure with the following steps:• Remove the sec

25OUT CAL RANGE FUNCTIONThe instrument has a mechanism to prevent takingmeasurements in a range where the calibration doesnot assure the best results.

26The HI 88703 has built in complete GLP information. The calibration date and the calibration pointsare displayed in a comprehensive mode for each ra

27LOG AND LOG RECALLThe HI 88703 has a powerful log function that could store up to 200 records.Each record contains:• the measuring range,• the readi

28In the Setup mode, the instrument’s parameters, can be changed. Some parameters affect themeasuring sequence and others are general parameters that

29Date / TimeThis option is used to set the instrument’s date and time.Press the Modify to change the date/time.Press the ⊳ u functional keys to highl

3TABLE OF CONTENTSWARRANTY... 2

30Instrument IDOption: 0 to 9999.This option is used to set the instrument’s ID (identificationnumber). The instrument ID is used while exchanging dat

31REAGENT SETSHI 93703-58 Silicon oil (15 mL)HI 88703-11 Calibration set for turbidimeter(<0.1, 15, 100 750 and 2000 NTU)OTHER ACCESSORIESHI 73131

32Printed in ROMANIAMAN88703 04/13Hanna Instruments Inc.Highland Industrial Park584 Park East DriveWoonsocket, RI 02895 USATechnical Support for Cust

4Please examine this product carefully. Make sure that the instrument is not damaged. If anydamage occurred during shipment, please notify your local

5ABBREVIATIONSNTU Nephelometric Turbidity UnitsJTU Jackson Turbidity UnitsFTU Formazin Turbidity UnitsUSEPA US Environmental Protection AgencyLCD Liqu

6For the ratio turbidimeter range, the microprocessor of the instrument calculates the NTU value, fromthe signals that reaches the two detectors, by u

7FUNCTIONAL DESCRIPTIONINSTRUMENT DESCRIPTION1) Liquid Crystal Display (LCD). The LCD has backlight for better visibility in dark environments.2) Keyp

8DISPLAY DESCRIPTIONThe display contains the following fields:1) The current time in selected format2) Information related to the measurement3) Functi

9SPECIFICATIONSRange - non ratio mode 0.00 to 9.99; 10.0 to 40.0 NTU0.0 to 99.9; 100 to 268 Nephelos0.00 to 9.80 EBCResolution - non ratio mode 0.01;