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KSV Surface Potential Meter User Manual

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User's Manual
Surface Potential Meter
Revision 1.0

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Summary of Contents for KSV Surface Potential Meter

  • Page 1 User’s Manual Surface Potential Meter Revision 1.0...

  • Page 2: Table Of Contents

    5. INSTALLING THE KSV SPOT 5.1. Installation steps 5.1.1. KSV SPOT software 5.1.2. Connecting cables 5.1.3. Using KSV SPOT with third party devices 5.1.4. Calibration of the KSV SPOT 6. MEASUREMENTS 6.1. Stand-alone KSV SPOT 6.2. KSV SPOT connected to a KSV trough 7.

  • Page 3: Introduction

    The data can be exported in a form that is understood by the most common data reduction software. This manual provides information how to install and use the KSV SPOT. In order to obtain the maximum performance from the instrument read this manual and keep it available for reference.

  • Page 4: Technical Specifications

    3 mV Height dependency 10 mV/mm Drift Negligible in air, 3 mV/h with subphase Probe diameter 16 mm Sensor head dimension 95 mm Mounting Height adjustment 100 mm Computer requirements IBM compatible running Windows™ 2000/XP/Vista KSV SPOT Manual Rev. 1.0...

  • Page 5: General Introduction

    The design of KSV SPOT is based on these main ideas. The main application area for KSV SPOT is in monolayer studies, but due to its stand-alone property it is also suitable for other areas where surface potential measurements are required.

  • Page 6: Ksv Spot Principle Of Measurement

    KSV SPOT 4. KSV SPOT principle of measurement The block diagram of the measuring circuit of KSV SPOT meter is shown below. The upper electrode (vibrating plate) of the capacitor is set to vibrate with a frequency between 100-180 Hz. The upper electrode of the capacitor is placed a couple of mm from the test surface (solid or air/liquid interface depending on which type of measurement is performed).

  • Page 7: Installing The Ksv Spot

    The SpotMonitor software is supplied on a CD-ROM disk. Load the software onto the desired drive using normal Windows procedures. NOTICE! This software needs to be installed only if the KSV SPOT is intended to be used as a stand-alone unit.
  • Page 8 Counter Electrode Crocodile clip Now the KSV SPOT1 should be properly installed and ready for measurements. Now the KSV SPOT1 should be properly installed and ready for measurements. Now the KSV SPOT1 should be properly installed and ready for measurements.

  • Page 9: Using Ksv Spot With Third Party Devices

    5.1.4. Calibration of the KSV SPOT . Calibration of the KSV SPOT NOTICE! The KSV SPOT is factory calibrated and there should be no need for re KSV SPOT is factory calibrated and there should be no need for re KSV SPOT is factory calibrated and there should be no need for re-calibrating Below is described the calibration procedure in case calibration is needed.
  • Page 10 Measure the connected voltage with digital voltage meter (that shows at least 3 decimals) and enter the value to First Potential (V) field. Make sure that reading in First value (native units) has stabilized and press Next button. KSV SPOT Manual Rev. 1.0...
  • Page 11 Enter complement value (negative) to Second Potential (V) field. Make sure that reading in Second value (native units) has stabilized and press Next button. After this the calibration is done and new calibration factor is stored into SPOT memory. KSV SPOT Manual Rev. 1.0...

  • Page 12: Measurements

    KSV SPOT 6. Measurements 6.1. Stand-alone KSV SPOT alone KSV SPOT The measurements are performed with The measurements are performed with the SpotMonitor software. Place the counter electrode beneath the measuring probe. Adjust the height of the measuring Place the counter electrode beneath the measuring probe. Adjust the height of the measuring Place the counter electrode beneath the measuring probe.
  • Page 13 Start button. The User, Sample and Additions information can be inserted in advance by editing the database. After pressing the Start button in the Experimental Setup window a Measurement Control window will appear. KSV SPOT Manual Rev. 1.0...
  • Page 14 Stop in the Measurement Control window. After the measurements have been done all facilities for data point presentations in the KSV SpotMonitor software (graph, print and export of the data points etc.) can be used for the collected surface potential data.

  • Page 15: Ksv Spot Connected To A Ksv Trough

    KSV SPOT 6.2. KSV SPOT connected to a KSV trough When measuring with KSV SPOT in combination with a KSV LB trough one can use any of the available experiments in the KSV WinLB software. However, a few preparative procedures have to be performed before the surface potential can simultaneously be collected with other measuring parameters.
  • Page 16 Always zero the measuring head before spreading any substance on the surface. The measuring head can be zeroed by choosing Zero SPM from the Controls drop down menu in the KSV LB Control Software window. After spreading the substance one should wait a sufficiently long time before the compression is started.
  • Page 17 Presupposed that the surface potential measuring head has been started and zeroed from the KSV LB Control Software, and the control window has not been closed. The collection of surface potential data is stopped when the chosen LB experiment is completed or stopped.

  • Page 18: Example Measurements

    = 4 have been used. The obtained surface potential values are 349 ± 2 mV. This is in good accordance with the literature values. The reproducibility of the KSV SPOT measuring head is very good which is seen from the low standard deviation of the results.

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