Instruction Manual
HI 96801
Refractometer for Sucrose Measurements
www.hannainst.com
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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. |
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TABLE OF CONTENTS |
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PRELIMINARY EXAMINATION ............................................................................................. |
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GENERAL DESCRIPTION ..................................................................................................... |
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SPECIFICATIONS .................................................................................................................. |
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PRINCIPLE OF OPERATION ................................................................................................ |
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FUNCTIONAL DESCRIPTION ................................................................................................ |
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DISPLAY ELEMENTS ............................................................................................................ |
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WARNINGS ........................................................................................................................... |
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ERROR MESSAGES .............................................................................................................. |
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CALIBRATION PROCEDURE ................................................................................................ |
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MEASUREMENT PROCEDURE ............................................................................................. |
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MAKING A STANDARD BRIX SOLUTION |
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CHANGING TEMPERATURE UNITS ................................................................................... |
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BATTERY REPLACEMENT ................................................................................................. |
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WARRANTY ........................................................................................................................ |
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PRELIMINARY EXAMINATION |
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Remove the instrument from the packing materials and |
examine carefully to ensure no |
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damage has occurred during shipping. If any damage has occurred, notify your Dealer |
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or closest Hanna Customer Service Center. |
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Each HI 96801 instrument is supplied with: |
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• 9 V battery |
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• Instruction manual |
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Note: Save all packing material until you are sure that the instrument functions correctly. A defective instrument must be returned in its original packing.
MODEL IDENTIFICATION HI 96801
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 96801 Digital Sucrose Refractometer is a rugged portable, water resistant device that benefits from Hanna’s years of experience as a manufacturer of analytical instruments.
The HI 96801 is an optical instrument that employs the measurement of refractive index to determine the % Brix of sugar in aqueous solutions. The method is both simple and quick. Samples are measured after a simple user calibration with deionized or distilled water. Within seconds the instrument measures the refractive index of the sample and converts it to % Brix concentration units. The HI 96801 digital refractometer eliminates the uncertainity associated with mechanical refractometers and is easily portable for measurements in the field.
The measurement technique and temperature compensation employ methodology recommended in the ICUMSA Methods Book (Internationally recognized body for Sugar Analysis).
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.
SPECIFICATIONS
Range: |
0 to 85% 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) |
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: |
SS 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: |
420g |
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PRINCIPLE OF OPERATION
The Brix determination is 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 (θcritical) = n2 / n1
Where n2 is the refractive index of the lower-density medium; n1 is the refractive index of the higher-density medium.
In the HI 96801, 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. The HI 96801 automatically applies temperature compensation to the measurement and converts the refractive index of the sample to sucrose concentration in units of percent (by weight) Brix.
FUNCTIONAL DESCRIPTION
TOP VIEW
1.Liquid Crystal Display (LCD)
2.Read Key (User Measurement)
3.Zero Key (User Calibration)
4.On/Off
5.Primary Display
6.Secondary Display
7.Stainless Steel Sample Well and Prism
BOTTOM
8.Battery Cover
9.Battery Compartment
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