User manual HANNA INSTRUMENTS HI 83748

[. . . ] 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. com This Instrument is in Compliance with the CE Directives 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 explains why, as pigment polymerization occurs, the holding capacity of tartaric acid diminishes, resulting in delayed casse. The sulfate instead does complex with potassium from 50% in white wines up to 100% in red ones. Tartaric acid concentrations in wine range normally from 1. 5 to 4. 0 g/L. This acid concentration may not be confused with total or titratable acidity of wines that are often expressed in tartaric acid content too. Although it is the tartaric acid that is the predominantly present acid (up to 60% of the total acidity), others like malic, citric and several volatile acids do give a significant contribution to total acidity. 4 CE DECLARATION OF CONFORMITY Recommendations for Users Before using these products, make sure that they are entirely suitable for your specific application and for the environment in which they are used. Operation of these instruments may cause unacceptable interferences to other electronic equipments, this requiring the operator to take all necessary steps to correct interferences. Any variation introduced by the user to the supplied equipment may degrade the instruments' EMC performance. To avoid damages or burns, do not put the instrument in microwave ovens. For yours and the instrument safety do not use or store the instrument in hazardous environments. WARRANTY HI 83748 is warranted for two years against defects in workmanship and materials when used for its intended purpose and maintained according to the instructions. This warranty is limited to repair or replacement free of charge. Damages due to accident, misuse, tampering or lack of prescribed maintenance are not covered. If service is required, contact your dealer. If under warranty, report the model number, date of purchase, serial number and the nature of the failure. 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. To validate your warranty, fill out and return the enclosed warranty card within 14 days from the date of purchase. Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice. 17 BATTERIES REPLACEMENT 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. [. . . ] Also the Zero tag might blink if no zero measurement has been made before. At the end an acoustic signal alerts the user that the countdown has finished. Indicates that the meter is performing a zero measurement. The light intensity is automatically re-adjusted (auto-calibration features) if necessary. The instrument is zeroed and a measurement can be made. Indicates that the meter is making a measurement. Batteries voltage is getting low and the batteries need to be replaced. [. . . ]