Hanna Instruments HI 96811 User Manual

Instruction Manual

HI 96811, HI 96812 HI 96813, HI 96814

Refractometers for Wine and Grape

Product Measurements

www.hannainst.com

Dear Customer, Thank you for choosing a Hanna product. This manual will provide you with the necessary

information for the correct use of these instruments. Please read it carefully before using the meters. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com.

These instruments are in compliance with

directives.

TABLE OF CONTENTS

PRELIMINARY EXAMINATION ............................................................................................. 2

GENERAL DESCRIPTION .....................................................................................................3

SPECIFICATIONS .................................................................................................................. 4

PRINCIPLE OF OPERATION ................................................................................................5

MEASUREMENT UNITS ........................................................................................................ 6

FUNCTIONAL DESCRIPTION................................................................................................ 7

DISPLAY ELEMENTS............................................................................................................ 8

MEASUREMENT GUIDELINES .............................................................................................. 9

CALIBRATION PROCEDURE ................................................................................................ 9

MEASUREMENT PROCEDURE ...........................................................................................10

TO CHANGE MEASUREMENT UNIT (HI 96813, HI 96814) ..............................................11

TO CHANGE TEMPERATURE UNIT....................................................................................12

TO CHANGE POTENTIAL ALCOHOL CONVERSION FACTOR (HI 96813 only) ................13

MAKING A STANDARD %BRIX SOLUTION ......................................................................13

ERROR MESSAGES ............................................................................................................14

BATTERY REPLACEMENT .................................................................................................15

WARRANTY ........................................................................................................................ 15

PRELIMINARY EXAMINATION

Remove the instrument from the packing materials and examine carefully to ensure no damage has occurred during shipping. If any damage has occurred, notify your Dealer or closest Hanna Customer Service Center.

Each instrument is supplied with:

• 9 V battery

• Instruction manual

Note:Save all packing material until you are sure that the instrument functions

correctly. A defective instrument must be returned in its original packing.

All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Hanna Instruments Inc., Woonsocket, Rhode Island, 02895, USA.

GENERAL DESCRIPTION

The HI 96811, HI 96812, HI 96813 and HI 96814 Digital Wine Refractometers are rugged portable, water resistant devices that benefit from Hanna’s years of experience as a manufacturer of analytical instruments. Hanna offers four related wine refractometers to fill the differing requirements found in the industry. All are equally valid ways to measure the sugar content of grape or must samples in the field or winery.

The HI 96811, HI 96812, HI 96813 and HI 96814 are optical instruments that are based on the measurement of the refractive index of a solution. The measurement of refractive index is simple and quick and provides the vintner a standard accepted method for sugar content analysis. Samples are measured after a simple user calibration with deionized or distilled water. Within seconds the instrument measures the refractive index of the grape. These digital refractometers eliminate the uncertainty associated with mechanical refractometers and are easily portable for measurements in the field.

The four instruments utilize internationally recognized references for unit conversion and temperature compensation.

HI 96811 measures %Brix HI 96812 measures °Baumé HI 96813 measures %Brix

Potential Alcohol (% vol)

HI 96814 measures %Brix

°Oechsle (°Oe) °KMW (°Babo)

Temperature (in °C or °F) is displayed simultaneously with the measurement on the large dual level display along with icons for Low Power and other helpful message codes.

Key features include:

• Dual-level LCD

• Automatic Temperature Compensation (ATC)

• Easy setup and storage

• Battery operation with Low Power indicator (BEPS)

• Automatically turns off after 3 minutes of non-use

• Single-point calibration with distilled or deionized water

• Waterproof models offers IP65 waterproof protection

• Quick, precise results readings are displayed in approximately 1.5 seconds

• Small sample size as small as 2 metric drops.

SPECIFICATIONS

HI 96811

Range: 0 to 50 %Brix / 0 to 80°C (32 to 176°F) Resolution: 0.1 %Brix / 0.1°C (0.1°F) Accuracy: ±0.2 %Brix / ±0.3°C (±0.5°F)

HI 96812

Range: 0 to 28 °Baumé / 0 to 80°C (32 to 176°F) Resolution: 0.1 °Baumé / 0.1°C (0.1°F) Accuracy: ±0.1 °Baumé / ±0.3°C (±0.5°F)

HI 96813

Range: 0 to 50 %Brix / 0 to 25 % v/v Potential Alcohol / 0 to 80°C (32 to 176°F) Resolution: 0.1 %Brix / 0.1 % v/v Potential Alcohol / 0.1°C (0.1°F) Accuracy: ±0.2 %Brix / ±0.2 % v/v Potential Alcohol / ±0.3°C (±0.5°F)

HI 96814

Range: 0 to 50 %Brix / 0 to 230 °Oechsle / 0 to 42 °KMW / 0 to 80°C (32 to 176°F) Resolution: 0.1 %Brix / 1 °Oechsle / 0.1 °KMW / 0.1°C (0.1°F) Accuracy: ±0.2 %Brix / ±1 °Oechsle / ±0.2 °KMW / ±0.3°C (±0.5°F)

COMMON SPECIFICATIONS

Temperature Compensation: Automatic between 10 and 40°C (50 - 104°F) Measurement Time: Approximately 1.5 seconds Minimum Sample Volume: 100μL (cover prism totally) Light Source: Yellow LED Sample Cell: Stainless Steel ring and flint glass prism Case Material: ABS Enclosure Rating: IP 65 Battery Type / Life: 1 X 9V / 5000 readings Auto-Off: After 3 minutes of non-use Dimensions: 19.2(W) x 10.2(D) x 6.7(H) cm Mass: 420 g

PRINCIPLE OF OPERATION

%Brix, °Baumé, °Oechsle, °KMW and % potential alcohol determinations are made by measuring the refractive index of a solution. Refractive Index is an optical characteristic of a substance and the number of dissolved particles in it. Refractive Index is defined as the ratio of the speed of light in empty space to the speed of light in the substance. A result of this property is that light will “bend”, or change direction, when it travels through a substance of different refractive index. This is called refraction. When passing from a material with a higher to lower refractive index, there is a critical angle at which an incoming beam of light can no longer refract, but will instead be reflected off the interface. The critical angle can be used to easily calculate the refractive index according to the equation:

sin (θ

) = n2 / n

critical

Where n2 is the refractive index of the lower-density medium; n1 is the refractive index of the higher-density medium.

In the Hanna wine measurement refractometers, light from an LED passes through a prism in contact with the sample. An image sensor determines the critical angle at which the light is no longer refracted through the sample.

Specialized algorithms then apply temperature compensation to the measurement and convert this refractive index to the model specific measurement unit.

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