Biolin Scientific Sigma 702 Original User Manual
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Biolin Scientific Sigma 702 Original User Manual

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Sigma 702
User Manual
Original instructions
Force Tensiometer
MANUAL23834-4

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Summary of Contents for Biolin Scientific Sigma 702

  • Page 1 Sigma 702 User Manual Original instructions Force Tensiometer MANUAL23834-4...

  • Page 2: Table Of Contents

    Table of Contents INTRODUCTION SAFETY PHYSICAL DESCRIPTION Measurement Unit 3.1.1 Main Body 3.1.2 Balance 3.1.3 Lifting System 3.1.4 Measuring stage 3.1.5 LCD Display 3.1.6 Manual Membrane Keyboard Optional Accessories 3.2.1 Du Noüy Ring 3.2.2 Wilhelmy Plate 3.2.3 Density Probe 3.2.4 Thermostatic Vessel Cleaning procedure Maintenance...
  • Page 3 Using the optional printer CALIBRATION OF SIGMA 702 Calibration of the electromagnetic balance 6.1.1 Calibration procedure 6.1.2 Calibration result verification Calibration of the density measurement system TROUBLESHOOTING CONTACT AND SUPPORT EC DECLARATION OF CONFORMITY [ Attension KSV NIMA QSense ®...

  • Page 4: Introduction

    1. Introduction The Sigma tensiometer system is a high performance tensiometer for the measurement of surface or interfacial tension. The 702 is designed for measuring surface tensions and interfacial tensions between two liquids with Du Noüy ring or Wilhelmy plate. The density of a liquid can also be measured.

  • Page 5: Safety

    RISK OF INJURY. Do not configure the instrument with parts that are not supplied by Biolin Scientific and not intended to be used with Attension instruments. Do not install substitute parts that are not described in this manual. Do not perform any modifications to the product.
  • Page 6 CAUTION! Make sure that the power is switched off when making any electrical connections (apart from the USB cables). Connecting cables with power on may damage instrument electronics. To disconnect the instrument, after turning the instrument off, remove the power cord plug from the electric outlet. [ Attension KSV NIMA QSense...

  • Page 7: Physical Description

    (top) and measuring stage for improved stability. 3.1.5 LCD Display The built-in LCD display is used to monitor the status of the Sigma 702. It guides the user to the next step in the measurement or calibration procedure and shows the results obtained.

  • Page 8: Manual Membrane Keyboard

    Figure 1: Startup screen The bottom line of the display shows the balance reading, which is updated real-time. During measurement, the bottom line shows the surface tension or interfacial tension value calculated from the balance reading. Figure 2: Adjusting measurement parameters 3.1.6 Manual Membrane Keyboard The built-in Manual Membrane Keyboard allows the user to navigate through the menus of the user interface and to control sample stage movement and the stirrer.

  • Page 9: Optional Accessories

    3.2 Optional Accessories Note: You need at least one of the probes described in sections 2.8.1 through 2.8.3 to perform measurements with Sigma 702. 3.2.1 Du Noüy Ring A platinum-iridium ring (Du Noüy ring) can be purchased separately for use in surface tension and interfacial tension measurements.

  • Page 10: Density Probe

    A density probe (a glass ball with a wire hook attached to it) can be purchased separately for use for density measurement with Sigma 702. The hook of the probe is mounted to the hook that hangs from the balance housing.

  • Page 11: Cleaning Procedure

    3.3 Cleaning procedure In all measurements done with Sigma 702, the cleanliness of the used probes and beakers is extremely important for reliable and reproducible results. The best cleaning procedure depends on the samples used. Here is a typical cleaning procedure when water or oil is used.

  • Page 12: Technical Specifications

    4. Technical Specifications Sigma 702 Electro-magnetic balance Maximum load Weighing resolution* 0.01 mg Force resolution 0.01 mN ST Resolution with standard probe 0.01 mN/m Taring Automatic Calibration Manual Locking Manual *Actual resolution of the balance. Voltage and current Input voltage 100 –...

  • Page 13: Measurement

     Check that the transportation lock of the balance is fully open.  Turn Sigma 702 on at least half an hour before starting a measurement or calibration.  Calibrate the instrument if necessary (see section 5).  Check the condition of the measurement equipment you are going to use: A correct, non- deformed shape is important for Du Noüy ring and Wilhelmy plate.

  • Page 14: Measuring Surface Tension With A Du Noüy Ring

    5.2 Measuring surface tension with a Du Noüy ring 1. Check the instructions in section 5.1 and make necessary preparations. 2. Mount the cleaned Du Noüy ring in the tensiometer hook. 3. If there is any doubt, check that the correct ring type is selected and also other measurement settings are as preferred via Adjust parameters in the main menu.

  • Page 15: Choosing A Correction Method: Huh-Mason Or Zuidema-Waters

    5.2.1 Choosing a correction method: Huh-Mason or Zuidema-Waters Briefly: When measuring surface tension or interfacial tension with Sigma 702 and a Du Noüy ring, either of two possible methods can be used for correction factor calculation: Huh-Mason or Zuidema-Waters. Generally, Huh-Mason is regarded as the more accurate one whereas Zuidema- Waters is an older method and may be used, e.g., for compatibility with earlier results.

  • Page 16: Measuring Interfacial Tension With A Du Noüy Ring

    5.3 Measuring interfacial tension with a Du Noüy ring 5.3.1 Push Mode and normal (pull) mode An interfacial measurement is performed by pulling the Du Noüy ring from a polar liquid over the interface to a non-polar liquid. Often, the polar liquid is heavier than the non-polar one, so the ring is pulled upwards -- that is the normal mode.

  • Page 17: Surface Tension Measurement With A Wilhelmy Plate

    If you make a pull mode measurement, you will be asked to immerse the ring into the heavy-phase liquid and then pour the light-phase liquid. That way you can perform the measurement without first contaminating the ring in the light-phase liquid. If Push Mode is used, an additional weight (called Push Mode weight) must be mounted on the ring before starting a measurement.

  • Page 18: Taring Modes: Wet Taring And Dry Taring

    software (see section 6.6) or by using an optional printer. The standard deviation reading on the display after measurement will help you to detect any problems in the measurement sequence. Sigma will instruct you to move the liquid sample close to the probe. This is particularly important in Wilhelmy Plate measurement, since the plate approaches the surface rather slowly in order the get an accurate reading of the surface position.

  • Page 19: Density Of A Solid Object

    5.6 Collecting data to a PC A USB cable can be used to connect your Sigma 702 and a PC for data collection using a program called Attension Data Receiver. The program is included in the software USB drive that comes with the instrument.

  • Page 20: Using The Optional Printer

    Sigma 702 back panel and the printer. Connect the printer power cord to a mains outlet and power on the Sigma 702. The printer will automatically print your measurement results after a measurement is completed.

  • Page 21: Calibration Of Sigma 702

    If you are in doubt, it is advisable to calibrate, as the process is simple. Due to the excellent linearity of the balance, only two-point calibration is needed. First point is at zero weight and the second point is in the middle of the typical weighing range of the Sigma 702 tests.

  • Page 22: Calibration Of The Density Measurement System

    1. Turn on the Sigma 702 instrument. The instrument should be turned on at least half an hour before starting a measurement.

  • Page 23: Troubleshooting

    7. Troubleshooting Problem Possible solutions I get incorrect surface tension Make sure that you are using pure water and that the readings. sample and the sample cup are clean. Make sure that the Du Noüy ring or Wilhelmy plate has been cleaned properly and is not deformed.

  • Page 24: Contact And Support

    8. Contact and support If any problems arise please feel free to contact a local distributor or Attension directly. Attension can be contacted from the following address: Attension Tietäjäntie 2 FIN-02130 Espoo Finland Tel. +358-(0)9-5497 3300 Fax +358-(0)9-5497 3333 E-mail: info@attension.com (sales requests) support@attension.com (technical support and maintenance) Website: http://www.biolinscientific.com/attension...

  • Page 25: Ec Declaration Of Conformity

    9. EC Declaration of conformity [ Attension KSV NIMA QSense [25] ® ®...

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