Hanna-instruments HI 83749 Manual do Utilizador Página 1

1HI 83749Turbidity & BentocheckInstruction Manualwww.hannainst.com40Australia:Tel. (03) 9769.0666 • Fax (03) 9769.0699China:Tel. (10) 88570068 • F

10CUVETThe cuvet is part of the optical system and measurements can be affected by the glass imperfections,dirt, dust, scratches, or fingerprints pres

11REMOVING AIR BUBBLESAir bubbles present in the sample will cause erroneous high turbidity readings.• To remove air bubbles fill the cuvet with wine

12It is recommended to calibrate the meter only with Hanna ready-to-use calibration standard solutions.Alternatively, formazin standards can be used.

13• Remove the <0,10 NTU standard cuvet andplace the 15.0 NTU standard cuvet into theholder.• Close the lid and press READ . “----” and the“Lamp an

14• Remove the 100 NTU standard cuvet from themeter and insert the 500 NTU standard cuvetinto the holder.• Close the lid and press READ . “----” and t

15DELETE CALIBRATIONHI 83749 is factory calibrated. It is possible torestore factory calibration by deleting last performedcalibration.To delete last

16Note: For wine analysis it is recommended towork always with the AVG mode on.• Turn the instrument ON by pressing ON/OFF.• When the LCD displays “--

17AVG (SIGNAL AVERAGE MODE)It is recommanded to select this measurement mode when you work with unstable samples thatcontain suspended particles of di

18BENTOCHECK (PROTEIN STABILITY TEST)• Turn the instrument ON by pressing ON/OFF.When the LCD displays “----”, the instrumentis ready.Note: On the sec

19• Replace the cap. Invert several times to mix andthen wait for 1 minute.• Insert the cuvet into the instrument and closethe lid.• Press READ and “

2Dear Customer,Thank you for choosing a Hanna Instruments product. This manual will provide you with thenecessary information for correct use of the i

20DETERMINATION OF BENTONITE REQUIREMENTSAMPLE PREPARATION• Fill 4 HANNA vials with 25 mL of unfiltered winesample.• Prepare a bentonite suspension of

3Please examine this product carefully. Make sure the instrument is not damaged. If any damagehas occurred during the shipment, please notify your dea

4GENERAL DESCRIPTIONGENERAL DESCRIPTIONThe prevention of protein haze or deposit in bottled white wines is a universal concern and often awine needs t

5If protein instability is detected, a next test can help defining the right amount of bentonite to beadded for improving protein stability. It is imp

6Many methods were used to measure turbidity over the years. The Jackson Candle Turbidimeter wasused to measure turbidity as Jackson turbidity units (

7Range 0.00 to 9.99 NTU10.0 to 99.9 NTU100 to 1200 NTURange Selection AutomaticallyResolution 0.01 NTU from 0.00 to 9.99 NTU0.1 NTU from 10.0 to 99.9

88) ON/OFF: this is a bi-funcional key. Just press to turn the instrument on or to activate the backlight. Hold the key for 3 seconds to turn the inst

9DISPLAY DESCRIPTION1) Battery icon. This icon appears when the status of the battery is displayed or when the batteryvoltage is getting low.2) Hour g