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Summary of Contents for Milwaukee MI455 PRO
- Page 1 INSTRUCTION MANUAL MI455 PRO Free & Total Sulphur Dioxide Mini Titrator for Wine Analysis SATISFACTION GUARANTEED...
- Page 2 This instruction manual will provide you the necessary information for correct use of the meter. All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Milwaukee Instruments Inc., Rocky Mount, NC 27804 USA.
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Page 3: Table Of Contents
TABLE OF CONTENTS 1. FUNCTIONAL DESCRIPTION ............................4 2. GENERAL DESCRIPTION .............................6 3. PRINCIPLE OF OPERATION ............................8 4. SPECIFICATIONS ................................8 5. STARTUP .....................................9 6. GUIDE TO DISPLAY CODES ............................10 7. GENERAL TIPS FOR AN ACCURATE MEASUREMENT .................12 8. PUMP CALIBRATION PROCEDURE ........................13 9. -
Page 4: Functional Description
G. MEASUREMENT UNIT H. TIMER MODE INDICATOR I. SECONDARY DISPLAY Keypad MI455 PRO Sulphur Dioxide Mini Titrator A. PUMP – to start/stop the pump B. CAL – to enter pump calibration mode C. STIR – to start/stop the stirrer while in measurement or purging mode... - Page 5 FUNCTIONAL DESCRIPTION 5 Front Panel A. TITRANT BOTTLE C. KEYPAD B. LIQUID CRYSTAL DISPLAY (LCD) D. ELECTRODE HOLDER Rear Panel E. ORP ELECTRODE I. BNC ELECTRODE CONNECTOR F. PERISTALTIC PUMP TUBE J. FUSE G. BEAKER K. POWER CABLE CONNECTOR H. PERISTALTIC PUMP L.
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Page 6: General Description
The MI455 is a low-cost, easy to use, microprocessor-based automatic titrator. It has a simple and reliable peristaltic pump that ensure high dosing repeatability. By performing pump calibration with the provided Milwaukee standards, the instrument accuracy is assured. The instrument comes with a pre-programmed analysis method designed for Free and Total Sulphur Dioxide measurements on wine samples. - Page 7 The Milwaukee MI455 offers the possibility to test free or total SO₂ in all the wines including the red ones, that are difficult to test with manual methods because the color changes are hardly seen.
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Page 8: Principle Of Operation
8 MI455 Mini Titrator for Wine Analysis 3. PRINCIPLE OF OPERATION Determination of sulphur dioxide in wine samples is made by titration of the sulphur dioxide present in wine with iodate. In this procedure an excess of iodine is added to the wine sample and it is titrated with iodate. -
Page 9: Startup
STARTUP 9 Required Reagents Code Description Quantity/test Mi555-001 Standard (for Free & Total SO₂) 50 mL Mi555-002 Titrant (for Free & Total SO₂) Mi555-003 Alkaline Reagent (for Total SO₂) 5 mL Mi555-004 Acid Reagent (for Total SO₂) 5 mL Mi555-005 Acid Reagent (for Free SO₂) 5 mL Mi555-006... -
Page 10: Guide To Display Codes
10 MI455 Mini Titrator for Wine Analysis 6. GUIDE TO DISPLAY CODES This screen appears for a few seconds each time the instrument is turned ON. Main screen display. Main screen display with stirrer active. Purging mode message. Pump Calibration Messages This screen appears each time the meter enters pump calibration mode. - Page 11 GUIDE TO DISPLAY CODES 11 This error message appears when the sample concentration exceeds 400 ppm. The used standard solution is wrong. This error message appears when the input readings (mV) exceed the input limits (0÷1000mV). Titration Messages This screen appears each time a titration is running. When the START STOP button is pressed the minititrator returns to the main screen.
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Page 12: General Tips For An Accurate Measurement
12 MI455 Mini Titrator for Wine Analysis 7. GENERAL TIPS FOR AN ACCURATE MEASUREMENT The instructions listed below should be carefully followed during testing to ensure best accuracy. y Purge the peristaltic pump to have fresh titrant when starting a new analysis or calibration. -
Page 13: Pump Calibration Procedure 13
PUMP CALIBRATION PROCEDURE 13 8. PUMP CALIBRATION PROCEDURE Warning: The calibration of the pump must be performed each time the pump tube, the reagent bottle or the pH electrode is changed. It is recommended to perform the pump calibration before each set of measurements. y Using a clean pipette, fill the 100 mL beaker up to the 50 mL mark with MI555-001 Standard. - Page 14 14 MI455 Mini Titrator for Wine Analysis y Add the contents of one powder packet of MI555-006 Stabilizer into the beaker. MI555-006 Stabilizer y Press CAL button. The meter enters in pump calibration mode. y Press START STOP in order to start the system calibration. y At the end of the calibration, DONE appears for a few seconds and the meter returns to the measurement mode.
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Page 15: Free So₂ Measurement Procedure 15
FREE SO₂ MEASUREMENT PROCEDURE 15 9. FREE SO₂ MEASUREMENT PROCEDURE y Using a clean pipette, fill the 100 mL beaker up to 50 mL mark with the wine sample. Note: It is important to be accurate in your measurements of Wine sample. Pipettes are recommended. - Page 16 16 MI455 Mini Titrator for Wine Analysis y Press START STOP in order to start titration. The display will show “----” during titration, along with stirrer and pump tags blinking on the LCD. y At the end of the titration, the Sulphur Dioxide concentration is displayed in mg/L (ppm).
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Page 17: Total So₂ Measurement Procedure 17
TOTAL SO₂ MEASUREMENT PROCEDURE 17 10. TOTAL SO₂ MEASUREMENT PROCEDURE y Fill the 100 mL beaker up to 50 mL mark with the wine sample. Note: It is important to be accurate in your measurement of wine sample. Pipettes are recommended. 50 mL Wine Sample y Place the stir bar in the beaker and put the beaker in the minititrator top. - Page 18 18 MI455 Mini Titrator for Wine Analysis y Add the content of one powder packet of Mi555-006 Stabilizer into the beaker. MI555-006 Stabilizer y Press START STOP button to start titration. The display will show “----” during titration, along with stirrer and pump tags blinking on the LCD. y At the end of the titration, the Sulphur Dioxide concentration is displayed in mg/L (ppm).
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Page 19: Pump Tube Replacement 19
PUMP TUBE REPLACEMENT 19 11. PUMP TUBE REPLACEMENT To remove the tube of the peristaltic pump follow next steps: y Detach the old tube system from the reagent bottle. y Grasp one fixing ring of the peristaltic pump tube. y Pull the tube until it’s taken out from its location. y Remove the other side of the tube. -
Page 20: Fuse Replacement
20 MI455 Mini Titrator for Wine Analysis 12. FUSE REPLACEMENT To change the fuse follow next steps: y Disconnect the power cord from the rear panel of the instrument. y Pull out the fuse holder located near the power cord connector. y Replace the fuse with a similar one. -
Page 21: Electrode Conditioning & Maintenance 21
ELECTRODE CONDITIONING & MAINTENANCE 21 13. ELECTRODE CONDITIONING & MAINTENANCE Preparation Procedure Remove the protective cap of the ORP electrode (MA924B/1). Do not be alarmed if salt deposits are present. This is normal with electrodes. They will disappear when rinsed with water. During transport, tiny bubbles of air may form inside the glass bulb affecting proper functioning of the electrode. - Page 22 Allow the electrode to stand upright for 1 hour. Follow the Storage Procedure above. Cleaning Procedure y Wine deposits: Soak in Milwaukee MA9016 cleaning solution for 1 hour y Wine stains: Soak in Milwaukee MA9016 cleaning solution for 1 hour...
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Page 23: Accessories
ACCESSORIES 23 14. ACCESSORIES Reagent Sets MA9011 Electrode filling solution (230 mL) MA9015 Electrode storage solution (230 mL) MA9016 Cleaning solution (230 mL) MI555-001 Calibration standard (500 mL) MI555-002 Titrant solution (110 mL) MI555-003 Alkaline reagent (210 mL) MI555-004 Acid reagent for Total SO₂ determination (210 mL) MI555-005 Acid reagent for Free SO₂... -
Page 24: Certification
24 MI455 Mini Titrator for Wine Analysis CERTIFICATION Milwaukee Instruments conform to the CE European Directives. Disposal of Electrical & Electronic Equipment. Do not treat this product as household waste. Hand it over to the appropriate collection point for the recycling of electrical and electronic equipment. -
Page 25: Warranty
If service is required, contact your local Milwaukee Instruments Technical Service. If the repair is not covered by the warranty, you will be notified of the charges incurred. When shipping any meter, make sure it is... - Page 26 26 MI455 Mini Titrator for Wine Analysis MANMI455 11/20...
- Page 27 Milwaukee Instruments reserves the right to make improvements in design, construction and appearance of its products without advance notice.
- Page 28 THANK YOU FOR CHOOSING Sales and Technical Service Contacts: Milwaukee Electronics Kft. Alsó-kikötő sor 11C H-6726 Szeged - HUNGARY tel: +36 62 428 050 fax: +36 62 428 051 www.milwaukeeinst.com e-mail: sales@milwaukeeinst.com Milwaukee Instruments, Inc. 2950 Business Park Drive Rocky Mount, NC 27804 USA...