INSTRUCTION MANUAL
Contents
1. O to 150 1 000 to 1 114 O to 80 C 32 to 176 F Resolution 1 1 0 001 0 1 C 0 1 F Accuracy 2 2 0 002 20 3 C 0 5 Light Source Yellow LED Approximately 1 5 seconds 100 uL cover prism totally Stainless Steel ring and flint glass prism Automatic between 0 and 40 C 32 to 104 F ABS IP 65 Battery Type Life 1 x 9 volt AA batteries 5000 readings Auto Shut off After 3 minutes of non use Dimensions 19 2 x 10 2 x 6 7 cm 7 5 x 4 x 2 6 Weight 420 g 14 8 oz PRINCIPLE OF OPERATION Salinity determinations are made by measuring the refractive index of seawater 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 www milwaukeeinst com Refraction Critical Angle Total Internal Reflection H O critical O critical 0 angle of incidence N4 N refractive index angle of refraction The critical angle can be used to easily calculat2. and the version number on the secondary display Continue pressing the ON OFF key 8 seconds HABA HH 7 B BB Be While continuing to hold the ON OFF key press the ZERO key The temperature unit will change from C to F or vice versa MAKING A STANDARD SODIUM CHLORIDE SOLUTION Sodium Chloride solutions can be used to check the accuracy of the meter The table below lists two Sodium Chloride solutions and their expected ppt Seawater value To make a Standard NaCl Solution g 100 g follow the procedure below e Place container such as a glass vial or dropper bottle that has a cover on an analytical balance Tare the balance To make an X NaCl solution weigh out X grams of high purity dried Sodium Chloride CAS 7647 14 5 MW 58 44 directly into the container Add distilled or deionized water to the container so the total weight of the solution is 100 g g of NaCl g of Water Total Weight Expected ppt Seawater Value 3 5 NaCl 3 50 96 50 100 00 34 10 NaCl 10 00 90 00 100 00 96 www milwaukeeinst com ERROR MESSAGES Error Code Description General failure Cycle power to instrument If instrument still has error contact Milwaukee Sample is reading lower LO Primary display than the O standard used for meter calibration Sample exceeds maximum Primary display measurement range Wrong calibration used to LO Primary
3. display zero instrument Use CAL segment ON deionized or distilled water Press Zero Wrong calibration used to HI Primary display zero instrument Use CAL segment ON deionized or distilled water Press Zero Temperature exceeds ATC low limit 0 C during calibration t LO Primary display CAL segment ON Temperature exceeds ATC high limit 40 C during calibration t HI Primary display CAL segment ON Prism surface insufficiently covered Too much external light for measurement Cover sample well with hand LED light is not detected Contact Milwaukee lt 5 of battery life is Battery segment blinking remaining Temperature values are Temperature measurement blinking out of sampling range 0 0 0 0 C or 80 0 C E J to 80 0 C I Outside temperature ATC segment blinking compensation range 0 to 40 C SETUP segment Factory calibration lost blinking Contact Milwaukee Instruction Manual MA887 Refractometer for Seawater Measurements BATTERYREPLACEMENT 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 Replace with fresh 9V battery making certain to observe polarity Insert the back battery cover and fasten it by turning clo
4. INSTRUCTION MANUAL Milwaukee Refractometer MA887 Refractometer for Seawater Measurements AN Milwaukee www milwaukeeinst com Instruction Manual MA887 Refractometer for Seawater Measurements TABLE OF CONTENTS FUNCTIONAL DESCRIPTION 3 GENERAL DESCRIPTION 5 SPECIFICATIONS vsxsscsisieupeasneaistuanakaceaede san dvebwseaussuad atehsosmaaateauavetnslseleunandaenunantogs 6 PRINGIPLE OF OPERATION wedisvencavesswaene 6 MEASUREMENT GUIDELINES ENEE ham desidert 8 CALIBRATION PROCEDURE 8 MEASUREMENT PROGEDURE ENEE 10 CHANGING MEASUREMENT UNIT paean sida 11 CHANGING TEMPERATURE UNIT eegen ENEE 12 MAKING A STANDARD SODIUM CHLORIDE 12 ERROR MESSAGES E 13 BATTERY REPLACEMENT E E TRE edd E A 14 WARRANTY AEA TEE 15 Remove the instrument from the packing materials carefully to ensure no damage has occurred during shipping If any damage has occurred notify your Dealer Each instrument is supplied with 9 V battery Instr
5. Make sure the prism is completely covered HEN ff SSR JL gt E 7 DISTILLED f A 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 3 Press the ZERO key If no error messages appear your unit is calibrated For a description of ERROR MESSAGES see page 13 0 CH esb St Note The 0 screen will remain until o sample is measured or the instrument is turned off 4 Gently absorb the ZERO water standard with a soft tissue Use care not to scratch the prism surface Dry the surface completely The instrument is ready for sample measurement Note If instrument is turned off the calibration will not be lost Instruction Manual MA887 Refractometer for Seawater Measurements MEASUREMENT PROCEDURE Verify the instrument has been calibrated before taking measurements 1 Wipe off prism surface located at the bottom of the sample well Make sure the prism and sample well are completely dry 2 Using a plastic pipette drip sample onto the prism surface Fill the well completely TN D m m 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 The results are displayed in unit of interest Note The la
6. ckwise 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 a 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 instrument electrode and probe to either distributor or our office and the repair will be effected free of charge 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 THANK YOU FOR CHOOSING Milwaukee Sales and Technical Service Contacts Milwaukee Electronics Kft Als kik t sor 11 6726 Szeged Hungary Tel 36 62 428 050 Fax 36 62 428 051 e mail sales milwaukeeinst com 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 MANMA887 10 09
7. e the refractive index according to the equation sin Bea ni Where n is the refractive index of the lower density medium n is the refractive index of the higher density medium Sample Well Sample NY Linear Image Sensor In the MA887 refractometer 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 the refractive index to PSU Practical Salinity Units ppt part per thousand or S G Specific Gravity 20 20 PSU is defined as the conductivity ratio of seawater to a standard KCI solution It is based upon the work of the UNESCO ICES SCOR and IAPSO This information is published in The Joint Panel of Oceanographic Tables and Standards An older salinity scale is ppt 103 where salinity is defined by the salt content is the weight of the inorganic salts contained in 1 kg of seawater if all bromide and iodide are replaced by an equivalent amount of oxides Knudsen 1901 Instruction Manual MA887 Refractometer for Seawater Measurements Specific Gravity 20 20 ia based upon the published relationship between density at 20 C and the mass of dissolved salts in the seawater sample CRC Handbook of Chemistry and Physics 87 Edition MEASUREMENT GUIDELINES Handle instr
8. nstrument that employs the measurement of the refractive index to determine the salinity of natural and artificial seawater ocean water or brackish interme diates The digital refractometer eliminates the uncertainty associated with mechanical refractometers and is easily portable for ship shore or home use The MA887 refractometer is an optical device that is simple and quick to use Samples are measured after a simple user calibration with distilled or deionized water Within seconds the refractive index and temperature are measured and converted into one of three popular measurement units Practical Salinity Units PSU Salinity in parts per thousand ppt or Specific Gravity S G 20 20 All conversion algorithms are based upon respected scientific publications using the physical properties of seawater not sodium chloride The temperature in C or F is also displayed on the large dual level display along with helpful message codes Key features include Waterproof models offers IP65 waterproof protection Automatic Temperature Compensation ATC Battery operation with Low Power indicator e Automatically turns off after 3 minutes of non use Instruction Manual MA887 Refractometer for Seawater Measurements Measurement Time Minimum Sample Volume Sample Cell Temperature Compensation Case Material Enclosure Rating SPECIFICATIONS PSU ppt S G 20 20 C F Range O to 50
9. st measurement value will be displayed until the next sample is measured or the instrument is turned off Temperature will be continuously updated Note The ATC tag blinks and automatic temperature compensation is disabled if the temperature exceeds the 0 40 C 32 104 F range 4 Remove sample from the sample well by absorbing on a soft tissue www milwaukeeinst com 5 Using a plastic pipette rinse prism and sample well with distilled or deionized water Wipe dry The instrument is ready for the next sample DISTILLED WATER CHANGING MEASUREMENT UNIT Press the RANGE key to select measurement units The instrument toggles between the three measurement scales each time the key is pressed and the primary display indicates PSU PPt and S G When the instrument displays the screen with 4 dashes the instrument is ready for measurement A number on the display indicates the selected unit 1 denotes PSU 2 denotes ppt and 3 denotes Specific Gravity a Pou PPE 50 ae Instruction Manual MA887 Refractometer for Seawater Measurements CHANGING TEMPERATURE UNIT To change the temperature measurement unit from Celsius to Fahrenheit or vice versa follow this procedure Press and hold the ON OFF key continuously for approximately 8 seconds The LCD will display the all segment screen followed by a screen with the model number on the primary display
10. uction 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 www milwaukeeinst com FUNCTIONAL DESCRIPTION DISPLAY m pop EF mri HHH BATTERY STATUS ICON BLINKS WHEN LOW BATTERY CONDITION DETECTED MEASUREMENT IN PROGRESS TAG SETUP FACTORY CALIBRATION TAG CAL CALIBRATION TAG AUTOMATIC TEMPERATURE COMPENSATION BLINKS WHEN TEMPERATURE EXCEEDS 10 40 C 50 104 F RANGE PRIMARY DISPLAY DISPLAYS MEASUREMENT AND ERROR MESSAGES TEMPERATURE UNITS SECONDARY DISPLAY DISPLAYS TEMPERATURE MEASUREMENTS WHEN BLINKING TEMPERATURE HAS EXCEEDED OPERATION RANGE 0 80 C 32 176 F RANGE INDICATOR Instruction Manual MA887 Refractometer for Seawater Measurements FRONT PANEL A MAB87 Seawater Refractometer 2 ppt 3 S G 20 20 __ LIQUID CRYSTAL DISPLAY LCD READ KEY USER MEASUREMENT ZERO KEY USER CALIBRATION RANGE KEY USER MEASUREMENT UNIT ON OFF STAINLESS STEEL SAMPLE WELL AND PRISM SECONDARY DISPLAY PRIMARY DISPLAY IQTMmM0ONE gt BOTTOM I BATTERY COVER J 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 MA887 is an optical i
11. ument carefully Do not drop Do not immerse instrument under water Do not spray water to any part of instrument except sample well located over the prism The instrument is intended to measure seawater solutions Do not expose instrument or prism to solvents that will damage it This includes most organic solvents and extremely hot or cold solutions Particulate matter sample may scratch the prism Absorb sample with a soft tissue and rinse sample well with deionized or distilled water between samples Use plastic pipettes to transfer all solutions Do not use metallic tools such as needles spoons or tweezers as these will scratch the prism Cover sample well with hand if measuring in direct sun CALIBRATION PROCEDURE Calibration should be performed daily before measurements are made when the battery has been replaced between a long series of measurements or if environmental changes have occurred since the last calibration 1 Press the ON OFF key then release Two instrument test screens will be displayed briefly all LCD segments followed by the percentage of remaining battery life The meter will then briefly display an indication of the measurement unit set When the LCD displays dashes the instrument is ready CoN gage 100 8888 www milwaukeeinst com 2 Using a plastic pipette fill the sample well with distilled or deionized water
Download Pdf Manuals
Related Search