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KEM RA-620 Operation Manual

Refractometer
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Refractometer
RA-620/RA-600
Operation Manual
* P 5 9 0 0 0 3 3 0 1 *
Read this operation manual thoroughly before use.
AN 59-00033-01Ver.10

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Summary of Contents for KEM RA-620

  • Page 1 Refractometer RA-620/RA-600 Operation Manual * P 5 9 0 0 0 3 3 0 1 * Read this operation manual thoroughly before use. AN 59-00033-01Ver.10...

  • Page 3: Introduction

    1. Introduction Thank you for choosing a KEM refractometer. This refractometer (RA-620/RA-600) is a precision instrument which measures the refractive index of liquid samples. The reflection signal of LED light from prism received by CCD (charge-coupled device) is computed by the built-in processor, and measurement results appear on display immediately.

  • Page 4: Safety Controls

    1. Introduction 1-1. Safety Controls Important: You must observe the following rules in order to prevent physical or property damage of yourself as well as of the others. Meaning of Symbols Warning Danger of severe injury or possible death Caution Risk of physical or property damage This symbol means Prohibition.
  • Page 5 Do not attempt overhaul or repair Do not use the unit in a way other the unit by unauthorized person than specified. except authorized by KEM. Danger of fire, electric shock or Danger of electric shock, fire or malfunctioning of the unit.

  • Page 6: About The Manual

    1. Introduction 1-2. About the Manual Read this operation manual thoroughly before use. It describes all that are required for routine measurements. Keep this manual beside your equipment so that you can refer to whenever necessary. For detailed test methods, see the separate Function Description. For basic measurement procedures, see the quick manual.

  • Page 7: Supplied Parts And Installation

    1-3. Supplied Parts and Installation Supplied Parts The carton box contains Main unit of RA-620 or RA-600 together with supplied parts and operating manual. Check the contents according to the below list. If you should find any missing or broken part or parts, contact your dealer or sales representative.

  • Page 8: Table Of Contents

    Table of Contents Table of Contents Page 1. Introduction 1-1. Safety Controls .............. 2 1-2. About the Manual ............4 1-3. Supplied Parts and Installation ........5 2. Parts Configuration 2-1. Main Unit ..............8 2-2. Touchscreen ..............10 3. Preparation for Measurement 3-1.

  • Page 9: Ra-620/Ra-600

    Configure Contents (nD, Brix) P. 18 Check on unit and the result P. 23 Calibrate the unit P. 25 Measurement Measure P. 19 Stop measurement P. 20 Measurement Data Read the data P. 21 Download data to USB flash drive P. 21 RA-620/RA-600...

  • Page 10: Parts Configuration

    2. Parts Configuration 2. Parts Configuration 2-1. Main Unit Front and top Touchscreen » [2-2. Touchscreen] Sample Cover Anti Volatilization Device Sample Stage Prism As measurement temperature is set to high, the sample stage and prism will warm-up accordingly. The stopper on sample cover prevents erroneous access to the screen. Do not give excessive force to the sample cover.
  • Page 11 LAN Connector Power Switch » [1-3. Supplied Parts Power Connector and Installation] Intake Vent » [2-2. Change Filter] RS-232C Connector (COM2) RS-232C Connector (COM1) Bottom Rubber Foot Exhaust Vent Do not block the exhaust vent and the intake vent. Note RA-620/RA-600...

  • Page 12: Touchscreen

    2. Parts Configuration 2-2. Touchscreen Main window Simple mode Contents Set Temp. Date, time Measurement Temp. When pressed, Shows date and time. window for selection of When pressed, Shows set temp. and contents appears. window for entry of date measurement temp. »...
  • Page 13 » See separate Function stability. Description. » See separate Function Description. Simple mode or Normal mode of Main window can be switched on “Menu” » “Setup” »”Display mode”. For details, see separate Function Description. RA-620/RA-600...
  • Page 14 2. Parts Configuration Main window Normal mode (When selecting changer) Sample No. Rinse & Purge Shows sample No. Press here to start rinse & Press here enter purge. sample No. » See Function Description. » See Function Description. Purge Press here to start purge. Switches to Skip when changer is operating.
  • Page 15 The Cap ▪ Small key switches capital ▪ small letter. Up to 16 characters can be entered except for sample ID up to 32 characters. Enter “~” for a symbol of an extended range of character. Alphabet (capital) Alphabet (small letter) Numeric character RA-620/RA-600...
  • Page 16 2. Parts Configuration Operational window Each window has buttons in common. Print out contents on Returns to Main window. Returns previous display. window. Tab buttons Switch the tabs. turns the page. For details of operation, see the separate Function Description. To operate the touch screen, lightly touch with stylus or your finger.

  • Page 17: Preparation For Measurement

    Checking with water is not necessary each time, however, it is recommended to do so if more than one hour has elapsed since the last measurement. For details of calibration, see [4-4. Calibration]. For details of check, see [4-3. Check]. RA-620/RA-600...

  • Page 18: Supply Reference Water

    3-2. Supply Reference Water Reference water used for check and calibration plays an important role as check point or reference point in maintaining performance and reliability of RA-620/RA-600 refractometer. Therefore, the quality of water has to meet the following conditions.

  • Page 19: Prepare Tools

    If the same tool is continuously used, the residual sample may remain and cause measurement error due to mixed sample in test. Note Never use a hard tool like glass, metallic or ceramic made to avoid substantial damage on prism. Note RA-620/RA-600...

  • Page 20: Set Up Conditions (Temperature, Contents)

    3. Preparation for Measurement 3-4. Set Up Conditions (Temperature, Contents) Most of measure conditions can be selected direct on main window. Contents button Temp. button Set the temperature Press “Temp.” button on main window Enter numerals on numeric pad To confirm, press Enter key. When set temp.

  • Page 21: Measurement

    A small amount of sample may result in inaccurate measurement with some samples. Meanwhile, too much sample liquid would make it longer to adjust the temperature and to complete the measurement. Note Close sample cover Close sample cover securely to shut out incoming rays for correct measurement. Note RA-620/RA-600...
  • Page 22 4. Measurement Press “Start” button Now measuring Measurement can be interrupted by pressing “Reset”. If an error appears, refer to [7-1. Error message]. Measurement results appear on display Immediately wipe off the sample after measurement and clean the prism and the sample stage.

  • Page 23: Read Data, Store In Usb Flash Drive

    Up to 300 data can be stored. More than 301 data will replace the older one from the oldest. A plural number of data can be selected at a time. For print or search of data record, refer to the separate Function Description. RA-620/RA-600...
  • Page 24 Remove USB flash drive device only after saving data is complete. Never remove it halfway. Otherwise, it may be broken. Note Example of data in CSV format by Microsoft Excel USB data stored in RA-620/RA-600 proper do not appear on PC display.

  • Page 25: Check

    Drop sufficient sample to cover the entire prism surface. A small amount of sample may result in inaccurate measurement with some samples. Meanwhile, too much sample liquid would make it longer to adjust the Note temperature and to complete the measurement. RA-620/RA-600...
  • Page 26 4. Measurement Close sample cover and press “Check Start”. Close sample cover securely to shut out incoming rays for correct measurement. Note When check is OK The value in ( ) shows the difference between check reference and measured value. “Finished”...

  • Page 27: Calibration

    When the display says <Calibration required.>, “Calibration” button will appear instead of “Check”. Pressing “Calibration” leads you to the below display in #3 by skipping Press “Calibration Navigator” To calibrate after check, press “Next”. Calibration after check recommended. “Stop” returns to main window. RA-620/RA-600...
  • Page 28 4. Measurement Close sample cover and press “Air Calib.” “Calibration Setup” goes Check/Calibration. Warm-up is suggested right after turning on the power or changing the set temp. The measurement time may get longer without a warm-up operation. See [3-1. Warming-up] for details. Well clean sample stage and prism prior to calibration with air.
  • Page 29 * High temperature setting is available as an option. (RA-600 only) It is important to conduct a calibration to ensure accurate measurement. If the power is turned off while a calibration is in progress, conduct a calibration once again after turning on the power. Note RA-620/RA-600...

  • Page 30: Function Tools

    5. Function Tools 5. Function Tools 5-1. Function Function window is a convenient tool to practice exciting features of the unit. To start with, let us learn about Function window itself. Press “Menu” Press “Function” Select Select the item to be worked on from “Critical Angle...
  • Page 31 Measurement data stored in RI meter can be saved or captured collectively. Data includes information on “Measurement record”, ”Method”, “Concentration conversion”, “Report”, “Temperature compensation” and “Check/Calibration setup”. For details of setup, refer to the separate Function Description. RA-620/RA-600...
  • Page 32 Various selections can be stored here. The registered information will be reflected on menu items, saving time for configuration. Setup of conditions when connecting options with your RA-620/RA-600. Printer, barcode reader, personal computer and changer can be connected. Can be selected when connecting optional Auto Sampling Unit (DCU-551N) or Multiple Sample Changer (CHD-502N).

  • Page 33: Maintenance

    (Refer to [4-3. check] [4-4. Calibration]) After measurement 1) Clean sample stage and prism thoroughly. (Refer to [3-3. Prepare tools]) 2) Wipe off dirt or stains on unit housing. (Do not use solvent like acetone, thinner and something similar.) RA-620/RA-600...

  • Page 34: Periodic Check

    Your refractometer is checked and serviced according to ISO 9001 Quality Management System. Either your unit is serviced at your site or sent back to KEM service. Our service work is conducted using measuring equipment which is traceable to national or international standard of metrology.

  • Page 35: Change Filter

    Do not scrub the dustproof filter when washing it; otherwise, it will be stretched and may not be fixed to the instrument again. Note Dry dustproof filter after rinse washed. Do not reinstall the filter before thoroughly dried. Note RA-620/RA-600...

  • Page 36: Consumables And Parts

    6. Maintenance 6-4. Consumables and Parts Below is the list of consumables and parts for RA-620/RA-600. For purchase of any of those in the list, contact your local dealer. Parts list Part Number Part Description Remarks 12-02529 AC Adapter Type2 with Power Cord (EU,KR)

  • Page 37: Troubleshooting

    It is today to work on check. Go on to work on check or extend check date. Calibration required. Calibration is necessary. Go on to calibrate. Calibration failed. Calibration result Review criterion accepted. recalibrate. Check failed. Check result is not accepted. Review criterion and recheck. RA-620/RA-600...
  • Page 38 7. Troubleshooting Error message at time of Entry or Registration Error Message Possible Cause Remedies Enter name. Name is blank. Enter the name. Same name exists. Enter name already Register a different name. different name. registered. Unable to enter. Data exceeds limit. Delete excessive data.
  • Page 39 Print (Error Code) Not enough sample. No sample or not enough No Measure －－－－－－－ sample. Check sample cover. No Measure －－－－－－－ Sample cover left open. Finished at limit time. ！ ！ Exceeding limit time. Exceeding meas range. ＊ ＊ RA-620/RA-600...

  • Page 40: Technical Tips

    7. Troubleshooting 7-2. Technical Tips This section describes key technique for sample type or conditions specific to measurement of refractive index. The following examples are those samples from which you may obtain poor repeatability, unnecessarily longer measuring time or even fail in measurement. Sample Type, Condition Cause, Key Technique Scattering of light by reflection from colloidal particles.
  • Page 41 Adjust the sample temperature close to the ambient. » Shorten temperature control time and measure quickly. The above “Key technique” may not solve all of your problems with sample. Contact your local dealer or sales representatives for assistance. RA-620/RA-600...

  • Page 42: Technical Information

    8. Technical Information 8. Technical Information 8-1. Terminology and References About Refractive Index Refractive index (n) is the ratio of wave velocity of light ray in vacuum to that of the medium. For convenience sake, air is used as reference medium. When light comes from the air into water, the light changes its direction at the boundary.
  • Page 43 Though you can obtain the actual concentration with sucrose solution, you may not necessarily obtain the concentration of sucrose solution when the solution contains other types of soluble solid matter. RA-620/RA-600...
  • Page 44 8. Technical Information Refractive index (nD) of sucrose solution Sucrose Sucrose Sucrose Sucrose g/100g (nD) g/100g (nD) g/100g (nD) g/100g (nD) 1.33299 1.37233 1.42009 1.47787 1.33442 1.37407 1.42220 1.48040 1.33586 1.37582 1.42432 1.48295 1.33732 1.37758 1.42647 1.48552 1.33879 1.37936 1.42863 1.48811 1.34026 1.38115...
  • Page 45 The concentration of isomerized liquid sugar is weight %, which can be obtained by conversion from refractive index( nD20 )of isomerized liquid sugar solution at 20C. RA-620/RA-600 stores conversion table of HFCS42 ISO , HFCS55 ISO , HFCS90 ISO...

  • Page 46: Options

    8. Technical Information 8-2. Options Various convenient peripherals are available as shown below. These options can be purchased from KEM. Contact your local dealer or sales representative. Dot Matrix Printer IDP-100 Print out of Thermal Printer measurement results DP-600 Epson A4 Printer ※...
  • Page 47 RS-232C Connection Cable (IDP-100). 12-02013 (9P-25P) 1m Connection Cable (MiniDIN8P-DSUB9P) required. Connection Cable 64-00625 (MiniDIN8P-DSUB9PM)160mm To connect PC, DCU-551N, CHD-502N USB Serial Transducer 64-00177-00 or IDP-100 with USB connector. US232R-10 Connection Cable required. 20-05983 Protect Cover To protect touchscreen RA-620/RA-600...

  • Page 48: Specifications

    *1: By KEM’s standard measurement conditions. *2: Calculated from measurement accuracy of refractive index: nD 0.00002 = Brix 0.014%. *3: By KEM’s standard measurement conditions. Subject to sample properties. *4: Peltier Thermostat *5: Lower limit 12°C below ambient. *6: 75°C to 100°C – Optional...

  • Page 49: Warranty And After-Sales Service

    9. Warranty and After-sales Service 9. Warranty and After-sales Service Warranty Period One (1) year from the date of receipt of this product or the date of installation by KEM service personnel or by authorized personnel. Warranty Details, After-sales Service...

This manual is also suitable for:

Ra-600

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