Milwaukee Instruments Doll MA871 User's Manual
Contents
1. Milwaukee Refractometer E MA871 Refractometer for Sucrose Measurements AW Milwaukee www milwaukeeinst com Instruction Manual MA871 Refractometer for Sucrose Measurements TABLE OF CONTENTS FUNCTIONAL hard budene bua 3 GENERAL DESCRIPTION 5 SPECIFICATIONS 6 PRINCIPLE OF OPERATION nts sete 7 MEASUREMENT GUIDELINES 8 CALIBRATION PROCEDURE 9 MEASUREMENTPROCEDURE 10 MAKING A STANDARD BRIX SOLUTION ser 11 CHANGING TEMPERATURE UNIT us detter mate 12 ERROR MESSAGES kerisi taggene E 13 BATTERY REPLACEMENT scssi dette 14 www milwaukeeinst com FUNCTIONAL DESCRIPTION DISPLAY BATTERY STATUS ICON BLINKS WHEN LOW BATTERY CONDITION DETECTED MEASUREMENT IN PROGRESS TAG SETUP FACTORY CALIBRATION TAG CAL CALIBRATION TAG PRIMARY DISPLAY DISPLAYS MEASUREMENT AND ERROR MESSAGES AUTOMATIC TEMPERATURE COMPENSATION BLINKS WHEN TEMPERATURE EXCEEDS 10 40 C 50 104 F RANGE TEMPERATURE UNITS SECONDARY DISPLAY DISPLAYS TEMPERATURE MEASUREMENTS WHEN BLINKING TE2. disabled if the temperature exceeds the 10 40 C 50 104 F range 4 Remove sample from the sample well by absorbing with a soft tissue www milwaukeeinst com 5 Using plastic pipettes rinse prism and sample well with distilled or deionized water Wipe dry The instrument is ready for the next sample DISTILLED WATER MAKING A STANDARD BRIX SOLUTION To make a Brix Solution follow the procedure below e Place container such as a glass vial or dropper bottle that has a cover on an analytical balance e the balance To make an X BRIX solution weigh out X grams of high purity Sucrose CAS 57 50 1 directly into the container distilled or deionized water to the container so the total weight of the solution is 100g e Note Solutions above 60 Brix need to be vigorously stirred or shaken and heated in a water bath to roughly 40 C 104 F Remove solution from bath when sucrose has dissolved Cool completely before use The total quantity can be scaled proportionally for smaller containers but accuracy may be sacrificed Example with 25 Brix Brix g Sucrose g Water g Total 25 25 000 75 000 100 000 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 aproximate
3. CIPLE 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 0 Mg Where is the refractive index of the lower density medium is the refractive index of the higher density medium Refraction Critical Angle Total Internal Reflection lt critical gt angle of incidence N4 refractive index angle of refraction 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 sucro
4. MPERATURE HAS EXCEEDED OPERATION RANGE 0 80 C 32 176 F Instruction Manual MA871 Refractometer for Sucrose Measurements FRONT PANEL M MA871 Refractometer 0 0 85 Brix LIQUID CRYSTAL DISPLAY LCD READ KEY USER MEASUREMENT ZERO KEY USER CALIBRATION ON OFF PRIMARY DISPLAY SECONDARY DISPLAY STAINLESS STEEL SAMPLE WELL AND PRISM BOTTOM H BATTERY COVER BATTERY COMPARTMENT www milwaukeeinst com GENERAL DESCRIPTION SIGNIFICANCE OF USE Thank you for choosing Milwaukee This instruction manual will provide you the necessary information for correct use of the meter The MA87 I 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 MA871 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 th
5. e 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 e Easy setup and storage Battery operation with Low Power indicator BEPS e Automatically turns off after 3 minutes of non use 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 Each MA871 instrument is supplied with 9 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 Instruction Manual MA871 Refractometer for Sucrose Measurements SPECIFICATIONS Range Resolution Accuracy Light Source Measurement Time Minimum Sample Volume Sample Cell Temperature Compensation Case Material Enclosure Rating Battery Type Life Auto Shut off Dimensions Weight O to 85 Brix 0 to 80 C 32 to 175 F 0 1 Brix 0 1 C 0 1 F 0 2 Brix 0 3 C 0 5 F Yellow LED Approximately 1 5 seconds 100 ul cover prism totally SS ring and flint glass prism Automatic between 10 and 40 C 50 to 104 F ABS 65 1 x 9 volt AA batteries 5000 readings After 3 minutes of non use 19 2 x 10 2 x 6 7 cm 7 5 x 4 x 2 6 420 g 14 8 oz www milwaukeeinst com PRIN
6. emperature values are blinking 0 0 or 80 0 C Temperature measurement out of sampling range 0 0 to 80 0 C ATC segment blinking Outside temperature compensation range 10 to 40 C SETUP segment blinking Factory calibration lost Contact Milwaukee 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 OFF Turn instrument upside down and remove the battery cover by turning it counterclockwise e Extract the battery from its location e Replace with fresh 9V battery making certain to observe polarity Insert the back battery cover and fasten it by turning clockwise to engage www milwaukeeinst com For your Safety don t use or store the instrument in hazardous environments To avoid damages or burns do not perform any measurement in microwave ovens WARRANTY This instrument is warranted against defects in materials and manufacturing for period of 2 years from the date of purchase Electrodes are warranted for 6 months If during this period the repair or replacement of parts is required where the damage is not due to negligence or erroneous operation by the user please return the intrument electrode and probe to either distributor or our office and the repair will be effected free of charge Damage due to accidents misu
7. ly 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 Continue pressing the ON OFF key 15 seconds 5888 ai i B888 2 While continuing to hold the ON OFF key press the ZERO key The temperature unit will change from C to F or vice versa C or F www milwaukeeinst com ERROR MESSAGES Error Code Description General failure Cycle power to instrument If instrument still has error contact Milwaukee LO Top display HI Top display Sample is reading lower than the standard used for meter calibration Sample exceeds maximum measurement range LO Top display Cal segment ON HI display Cal segment ON Wrong calibration used to zero instrument Use deionized or distilled water Press Zero Wrong calibration used to zero instrument Use deionized or distilled water Press Zero t LO Top display Cal segment ON t HI Top display Cal segment ON Temperature exceeds ATC low limit 10 C during calibration Temperature exceeds ATC high limit 40 C during calibration Prism surface insufficiently covered Too much external light for measurement Cover sample well with hand Battery segment blinking LED light is not detected Contact Milwaukee lt 5 of battery life is remaining T
8. nized water Note If the ZERO sample is subject to intense light such as sunlight or another strong source cover the sample well with your hand or other shade during the calibration fm J DISTILLED WATER 3 Press the ZERO key If no error messages appear your unit is calibrated For a description of ERROR MESSAGES see page 13 Note The 0 0 screen will remain until a sample is measured or the power is turned off zero x EN ATC W 2508 25 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 MEASUREMENT PROCEDURE Verify the instrument has been calibrated before taking measurements 1 Wipe off prism surface located at the bottom of the sample well 2 Using plastic pipettes drip sample onto the prism surface Fill the well completely Note If the temperature of the sample differs significantly from the temperature of the instrument wait approximately 1 minute to allow thermal equilibration 3 Press the READ key Measurement is displayed in units of BRIX ATC les 250 2507 Note The ATC tag blinks and automatic temperature compensation is
9. se 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 THANK YOU FOR CHOOSING AW Milwaukee Sales and Technical Service Contacts Milwaukee s r l C so Leonardo da Vinci 48 50 21013 Gallarate VA ITALY Tel 39 0331 26 80 09 Fax 39 0331 26 80 33 e mail sales milwaukee 1 91 it Milwaukee Instruments Inc 2950 Business Park Drive Rocky Mount NC 27804 USA Tel 1 252 443 3630 Fax 1 252 443 1937 e mail sales milwaukeetesters com www milwaukeeinst com MANMA871 04 09
10. se concentration in units of percent by weight Brix Instruction Manual MA871 Refractometer for Sucrose Measurements Sample Well Sample Linear Image Sensor MEASUREMENT GUIDELINES e Handle instrument carefully Do not drop Do not immerse instrument under water e Do not spray water to any part of instrument except the sample well located over the prism e instrument is intended to measure sugar solutions Do not expose instrument or prism to solvents that will damage it This includes most organic solvents and extremely hot or cold solutions e Particulate matter a sample may scratch the prism Absorb sample with a soft tissue and rinse sample well with deionized or distilled water between samples e Use plastic pipettes to transfer all solutions Do not use metallic tools such as needles spoons or tweezers as these will scratch the prism www milwaukeeinst com 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 8888 2 Using plastic pipettes fill the sample well with distilled or deio
Download Pdf Manuals
Related Search