SEO DST 30 Series Administrative Manual
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SEO DST 30 Series Administrative Manual

Surface tension meter
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6.0
Surface & Electro-Optics Corporation

Released 2014. 05

DST 30 Series
Surface Tension Meter
Administrative
Guide

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Summary of Contents for SEO DST 30 Series

  • Page 1: Released 2014. 05

    Version Surface & Electro-Optics Corporation Released 2014. 05 DST 30 Series Surface Tension Meter Administrative Guide...
  • Page 2 Surface & Electro-Optics Corporation Administrative Guide Copyright ã 2000 All rights reserved by SEO This is reprinted 2001.5 946 Kosekdong , Suwon city, Kyunggi-Do, 441-813, Korea TEL) 82-31-298 9561 FAX) 82-31-298 9565 www.s-eo.com email: seo@s-eo.com...
  • Page 3 Registration of SEO Series Model DST 30 Series Input Serial Number Date of P/O Manufacture S.E.O. Co. Ltd Warranty 1 year Registration of Software Measurement Method Du Noüy Ring, Wilhelmy Plate Measuring Range 0 to 500 dynes / cm Balance Capacity...

  • Page 4: For Safe And Effective Use

    In this operation manual, warning points are indicated with the following symbols to prevent operators from injuries and the instrument from damage. SEO uses its accumulated design and production experience to deliver advanced surface analysis products that offer superior performance and enhanced durability. Complete customer satisfaction through product quality is our goal.

  • Page 5: Table Of Contents

    Table of Contents Released 2014. 05 ........................ 1 FOR SAFE AND EFFECTIVE USE ..................4 1. HARDWARE SET-UP (DST 30 MANUAL TYPE) ................. 7 DST 30 ................7 ASIC ITEMS INCLUDED WITH THE .................. 8 OMPONENTS AND ONTROL LEMENTS ....................9 ONDITIONS OF NSTALLATION DST 30 S .....................

  • Page 7: Hardware Set-Up (Dst 30 Manual Type)

    1. Hardware Set-up (DST 30 Manual Type) Diagram & Installation Basic items included with the DST 30 Description Quantity Main Unit [200 mm x 250 mm x 310 mm] Weight Carrier Beam Rod Calibration Weight (50 g) Hanger for the ring & Extender Du Noüy Ring Glass Beaker Tweezers &...

  • Page 8: Components And Control Elements

    Components and Control Elements The DST 30 consists of several parts. This chapter provides an overview over the instrument and its components.

  • Page 9: Conditions Of Installation

    Conditions of Installation A. Environmental conditions ü Indoor use ü Temperature ≤ 40 ̊ C ü Maximum relative humidity 80% for temperatures up to 31 ̊ C decreasing linearly to 50% relative humidity at 40 ̊ C ü Main power supply voltage fluctuations not to exceed ± 5% of the nominal voltage B.

  • Page 10: Initial Dst 30 Set Up

    Initial DST 30 Set up A. Set up the DST 30 system on a stable, anti-vibration table. -The DST 30 footprint is 200 mm x 250 mm x 310 mm. -When installing the instrument, avoid placing the instrument in sunlight, near a noisy place, or near an area with vibration.
  • Page 11 D. Open the top door. E. Open the wall window of the DST 30. F. Remove the wrench bolt.
  • Page 12 G. Turn the handle to lower the sample stage. H. Remove the aluminum shipping support stick. I. Level the instrument with the leveling legs at the base of the instrument.
  • Page 13 Insert the ring into the in-line Hanger. K. Place the in-line Hanger onto the weight beam.

  • Page 14: Operation

    2 Operation Cleaning the Du Noüy Ring A. Remove the Du Noüy (Pt-Ir) ring from the in-line Hanger. B. Clean the Du Noüy ring carefully using an appropriate solvent. C. Lightly flame the Du Noüy ring over a blue flame from an alcohol burner. D.

  • Page 15: Loading The Sample

    Loading the Sample Power on the DST 30. Select the preferred “method” parameter on the digital display. Insert the Du Noüy ring or Wilhelmy plate into the in-line hanger. Lower the sample stage to the bottom with the dial, using a clockwise motion. Fill the beaker (approximately half full) with the sample.

  • Page 16: Measuring Surface Tension By The Du Noüy Ring Method

    Measuring Surface Tension by the Du Noüy Ring Method The following procedure shows proper operation the DST 30 system for surface tension analysis with a Du Noüy Ring. After powering on the instrument, it will automatically initialize. When the initialization process is complete, press the “Enter” key. Surface tension can be measured with or without a balance tare.
  • Page 17 5. Select “End Mode” to return to the “Balance Mode” / “Tension Mode” selection menu. 6. Proceed to Method 2 to measure surface tension. Method 2: Measuring surface tension without a balance tare. 1. Use the “arrow” key to select “Tension Mode”. 2.
  • Page 18 7. Move the sample stage down until the meniscus on the ring breaks. When “Max g” appears, press the “Enter” button. 8. The surface tension value will be displayed. Selecting “Restart” allows you to run another sample by returning to the “Set Ring” step. Selecting “End” returns to the first menu to select “Tension Mode”...

  • Page 19: Surface Tension Result By Ring Method

    2.3.1 Surface Tension Result by Ring Method This is a typical graph of surface tension using a Du Noüy ring. (*Note: the DST 30 model does not produce this graph, it will only display the digital value.)

  • Page 20: Measuring Surface Tension By The Wilhelmy Plate Method

    Measuring Surface Tension by the Wilhelmy Plate Method After powering on the instrument, it will automatically initialize. When the initialization process is complete, press the “Enter” key. Surface tension can be measured with or without a balance tare. Method 1: Measuring surface tension with a balance tare. (*Note: this is the same for both ring and plate methods.) 1.
  • Page 21 6. Proceed to Method 2 to measure surface tension. Method 2: Measuring surface tension without a balance tare. 1. Use the “arrow” key to select “Tension Mode”. 2. Use the “arrow” key to select “Plate Method” and press the “Enter” button. 3.
  • Page 22 8. The surface tension value will be displayed. Selecting “Restart” allows you to run another sample by returning to the “Set Plate” step. Selecting “End” returns to the first menu to select “Tension Mode” or “Balance Mode”.

  • Page 23: Surface Tension Result By Plate Method

    2.4.1 Surface Tension Result by Plate Method This is a typical graph of surface tension using a Wilhelmy plate. (*Note: the DST 30 model does not produce this graph, it will only display the digital value.)

  • Page 24: Measuring Interfacial Tension

    Measuring Interfacial Tension The following procedure shows proper operation the DST 30 system for interfacial tension analysis with a Du Noüy Ring. This procedure is very similar to the surface tension analysis procedure as interfacial tension is another aspect of thermodynamic interaction between the components of a system.
  • Page 25 6. Wait for the weight to stabilize. 7. Select “End Mode” to return to the mode selection menu. 8. Use the “arrow” key to select “Tension Mode”. 9. Select “Ring Method” and press the “Enter” button. 10. Input the ring circumference and R/r value. This information is found on the front of the wooden ring holder.

  • Page 26: Interfacial Tension Result

    13. Ensure the ring is properly submerged in the high-density sample. This “sets” the ring. Then press the “Enter” button. 14. Move the sample stage down until the ring completely enters the low-density liquid. When “Max g” appears, press the “Enter” button. 15.

  • Page 27: Cmc (Critical Micelle Concentration) Measurement

    CMC (Critical Micelle Concentration) Measurement When surfactants at very low concentrations are dispersed in water, they tend to become absorbed as a closely packed monolayer at the Gas-Liquid interface. CMC measurements are used to measure the surface tension in surfactant industries.

  • Page 28: Calibration

    3 Calibration Calibration Procedure 1. Press the “down arrow” twice to view the “Calibration Mode”. Press the “down arrow” a third time to select “Calib”, then press “Enter”. 2. Wait for the “Calibration Mode Processing” to complete. 3. Load the 50 g weight as show in the picture below, then press “Enter”. To load the weight: a.
  • Page 29 5. Unload the 50 g weight, using tweezers, when instructed. 6. Select “End” to return to the main menu.

  • Page 30: Theory Of Surface Tension

    4 Theory of Surface Tension The property of a liquid surface that causes it to act likes a stretched elastic membrane. The strength of this membrane depends on the forces of attraction between the particles of the liquid itself and with the particles of the gas, solid, or liquid with which it comes in contact.

  • Page 31: Conditions Influencing Surface Tension

    5 Conditions Influencing Surface Tension Temperature Surface tension is influenced by temperature. In most cases, when the temperature increases the surface tension decreases. Time Measurements that are conducted too fast may provide in an incorrect result. Therefore, please keep in mind to maintain calm and slow handling of the instrument. Density When the difference in density between two samples is small, the interfacial tension value will also be small, and it may be difficult to obtain a correct measurement.

  • Page 32: Company Information

    CSC Scientific Company, Inc. 2799-C Merrilee Dr. Fairfax, VA 22031 T 800-621-4778 F 703-280-5142 csc@cscscientific.com www.cscscientific.com SEO (Surface and Electro-Optics) Corporation Head Office #946 Kosek,Suwon city,Kyunggi-Do, 441-813. Korea T 82-31-298 9561 F 82-31-298 9565 www.s-eo.com Service Information Warranty The warranty for the DST 30 is valid for one year from the date of shipment.

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