Milwaukee MA871 Instruction Manual
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Milwaukee MA871 Instruction Manual

Refractometer for sucrose measurements
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Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
INSTRUCTION MANUAL
MA871
Refractometer for Sucrose
Refractometer for Sucrose
Refractometer for Sucrose
Refractometer for Sucrose
Refractometer for Sucrose
Measurements
Measurements
Measurements
Measurements
Measurements
TestEquipmentDepot.com
Milwaukee Refractometer
Milwaukee Refractometer
Milwaukee Refractometer
Milwaukee Refractometer
Milwaukee Refractometer
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  • Page 1 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 TestEquipmentDepot.com INSTRUCTION MANUAL Milwaukee Refractometer Milwaukee Refractometer Milwaukee Refractometer Milwaukee Refractometer Milwaukee Refractometer MA871 Refractometer for Sucrose Refractometer for Sucrose Refractometer for Sucrose Refractometer for Sucrose Refractometer for Sucrose...

  • Page 2: Table Of Contents

    Instruction Manual MA871 Refractometer for Sucrose Measurements TABLE OF CONTENTS FUNCTIONAL DESCRIPTION ................3 GENERAL DESCRIPTION ..................5 SPECIFICATIONS ....................6 PRINCIPLE OF OPERATION ................7 MEASUREMENT GUIDELINES ................8 CALIBRATION PROCEDURE ................9 MEASUREMENT PROCEDURE ................10 MAKING A STANDARD % BRIX SOLUTION ............11 CHANGING TEMPERATURE UNIT ..............

  • Page 3: Functional Description

    FUNCTIONAL DESCRIPTION DISPLAY DISPLAY DISPLAY DISPLAY DISPLAY A. BATTERY STATUS ICON (BLINKS WHEN LOW BATTERY CONDITION DETECTED) B. MEASUREMENT IN PROGRESS TAG C. SETUP: FACTORY CALIBRATION TAG D. CAL: CALIBRATION TAG PRIMARY DISPLAY (DISPLAYS MEASUREMENT AND ERROR MESSAGES) AUTOMATIC TEMPERATURE COMPENSATION (BLINKS WHEN TEMPERATURE EXCEEDS 10-40 °C / 50-104 °F RANGE) G.
  • Page 4 Instruction Manual MA871 Refractometer for Sucrose Measurements FRONT PANEL FRONT PANEL FRONT PANEL FRONT PANEL FRONT PANEL A. LIQUID CRYSTAL DISPLAY (LCD) B. READ KEY (USER MEASUREMENT) C. ZERO KEY (USER CALIBRATION) D. ON/OFF PRIMARY DISPLAY SECONDARY DISPLAY G. STAINLESS STEEL SAMPLE WELL AND PRISM...

  • Page 5: General Description

    Thank you for choosing Milwaukee. This instruction manual will provide you the necessary information for correct use of the meter. The MA871 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.

  • Page 6: Specifications

    Instruction Manual MA871 Refractometer for Sucrose Measurements SPECIFICATIONS Range 0 to 85% Brix 0 to 80 °C (32 to 175 °F) Resolution 0.1% Brix 0.1 °C (0.1 °F) Accuracy ± 0.2% Brix ± 0.3 °C (± 0.5 °F) Light Source...

  • Page 7: Principle Of Operation

    In the MA871, 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 MA871 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.

  • Page 8: Measurement Guidelines

    Instruction Manual MA871 Refractometer for Sucrose Measurements MEASUREMENT GUIDELINES • Handle instrument carefully. Do not drop. • Do not immerse instrument under water. • Do not spray water to any part of instrument except the “sample well” located over the prism.

  • Page 9: Calibration Procedure

    CALIBRATION PROCEDURE Calibration should be performed daily, before measurements are made, when the battery has been replaced, or between a long series of measurements. 1. Press the ON/OFF key, then release. Two instrument test screens will be displayed briefly; an “all segment” screen followed by the percentage of remaining battery life. When LCD displays dashes, the instrument is ready.

  • Page 10: Measurement Procedure

    Instruction Manual MA871 Refractometer for Sucrose Measurements 4. Gently absorb the ZERO water standard with a soft tissue. Use care not to scratch the prism surface. Wipe off the surface completely. The instrument is ready for sample measurement. Note: If instrument is turned off the calibration will not be lost.

  • Page 11: Making A Standard % Brix Solution

    5. Using plastic pipettes, rinse prism and sample well with distilled or deionized water. Wipe dry. The instrument is ready for the next sample. MAKING A STANDARD % BRIX SOLUTION To make a Brix Solution, follow the procedure below: • Place container (such as a glass vial or dropper bottle that has a cover) on an analytical balance.

  • Page 12: Changing Temperature Unit

    Instruction Manual MA871 Refractometer for Sucrose Measurements CHANGING TEMPERATURE UNIT To change the temperature measurement unit from Celsius to Fahrenheit (or vice versa), follow this procedure. 1. Press and hold the ON/OFF key continuously for aproximately 15 seconds. The LCD will display the “all segment” screen followed by a screen with the model number on the primary display and the version number on the secondary display.

  • Page 13: Error Messages

    ERROR MESSAGES l i t l i t ° ° < ° ° ° °...

  • Page 14: Battery Replacement

    Instruction Manual MA871 Refractometer for Sucrose Measurements BATTERY REPLACEMENT To replace the instrument’s battery, follow these steps: • Turn the instrument OFF by pressing the ON/OFF key. • Turn instrument upside down and remove the battery cover by turning it counterclockwise.

  • Page 15: Warranty

    Damage due to accidents, misuse, tampering or lack of prescribed maintenance is not covered by the warranty. Milwaukee/Martini instruments reserves the right to make improvements in design, construction and appearance of its products without advance notice.
  • Page 16 THANK YOU FOR CHOOSING MANMA871 04/09 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 TestEquipmentDepot.com...

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