Instruction Manual HI 83748 TARTARIC ACID ISM for wine analysis MAN83748R3 04/06 w w w . h a n n a i n s t . c o m www.hannainst.
Dear Customer, Thank you for choosing a Hanna product. This manual will provide you with the necessary information for the correct use of the instrument. Please read it carefully before using the meter. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com. This instrument is in compliance with directives. USER NOTES Date Tartaric Acid Value (g/L) Notes TABLE OF CONTENTS PRELIMINARY EXAMINATION ..................................................................
HANNA LITERATURE PRELIMINARY EXAMINATION Hanna publishes a wide range of catalogs and handbooks for an equally wide range of applications. The reference literature currently covers areas such as: • Water Treatment • Process • Swimming Pools • Agriculture • Food • Laboratory and many others. New reference material is constantly being added to the library. For these and other catalogs, handbooks and leaflets contact your dealer or the Hanna Customer Service Center nearest to you.
GENERAL DESCRIPTION CE DECLARATION OF CONFORMITY The HI 83748 is an auto-diagnostic portable microprocessor meter that benefits from Hanna’s years of experience as a manufacturer of analytical instruments. It has an advanced optical system based on a special tungsten lamp and a narrow band interference filter that allows most accurate and repeatable readings. All instruments are factory calibrated.
BATTERIES REPLACEMENT SPECIFICATIONS Battery replacement must only take place in a nonhazardous area. The blinking “ ” will appear when the batteries power gets low. When batteries are completely discharged, “0% bAtt” will appear and after two seconds the instrument is switched off. Remove the battery cover from the bottom of the instrument and change the old batteries with 4 fresh 1.5V batteries, paying attention to the correct polarity. Replace the cover.
PRINCIPLE OF OPERATION Absorption of Light is a typical phenomenon of interaction between electromagnetic radiation and matter. When a light beam crosses a substance, some of the radiation may be absorbed by atoms, molecules or crystal lattices.
A microprocessor controlled special tungsten lamp emits radiation which is first optically conditioned and beamed to the sample contained in the cuvet. The optical path is fixed by the diameter of the cuvet. Then the light is spectrally filtered to a narrow spectral bandwidth, to obtain a light beam of intensity Io or I. The photoelectric cell collects the radiation I that is not absorbed by the sample and converts it into an electric current, producing a potential in the mV range.
FUNCTIONAL DESCRIPTION MEASUREMENT PROCEDURE INSTRUMENT DESCRIPTION • Turn the instrument on by pressing ON/OFF. 1) 2) 3) 4) 5) 6) 7) 8) FRONT Lid Cuvet Holder Liquid Crystal Display (LCD) ON/OFF key, to turn the meter on and off ZERO key, to zero the meter TIMER key, to activate a countdown READ key, to perform measurement Power Socket 12V to 20V DC 2.5 Watt • When the LCD displays “---”, it is ready. • Use the 200 µL automatic pipette to add exactly 0,2 mL of wine sample to an empty cuvet.
• Proper use of the dropper: (a) to get good reproducible results, tap the dropper on the table for several times and wipe the outside of the dropper tip with a cloth. (b) always keep the dropper bottle in a vertical position while dosing the reagent. GUIDE TO DISPLAY CODES This prompt appears for a few seconds each time the instrument is turned ON. These prompts indicate the type of power supply: “Line” (if the external power supply is used) or the battery level.
Indicates that the batteries are dead and must be replaced. After this message appears, the instrument is switched off. Change the batteries and restart the meter. ERROR MESSAGES The meter has lost its configuration. Contact your dealer or the nearest Hanna Customer Service Center. a) on zero reading: “Light high”: there is too much light to perform a measurement. Please check the preparation of the zero cuvet. “Light low”: there is not enough light to perform a measurement.
