Related Manuals for Ossila L2004A1
Summary of Contents for Ossila L2004A1
- Page 1 CONTACT ANGLE GONIOMETER USER MANUAL Manual Version: 1.1.D Product Code: L2004A1 Product Version: 1.1 Software Version: 3.0...
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Page 2: Table Of Contents
Contents 1. Overview......................4 2. EU Declaration of Conformity (DoC) ............5 3. Safety .......................8 3.1 Warning ........................8 3.2 Caution ........................8 4. Requirements ....................8 5. Unpacking ......................9 5.1 Packing list .......................9 5.2 Damage Inspection ....................9 6. Specifications ....................9 7. Installation ....................10 8. Operation .....................10 8.1 Recording a Video .................... -
Page 3: Overview
1. Overview The Ossila Contact Angle Goniometer, part of the Institute of Physics award-winning Solar Cell Prototyping Platform*, provides a fast, reliable, and easy method to measure the contact angle or surface tension of a droplet. The system comes complete with PC software that provides a simple and intuitive interface for contact angle measurements. -
Page 4: Eu Declaration Of Conformity (Doc)
Telephone number: +44 (0)114 2999 180 Email Address: info@ossila.com declare that the DoC is issued under our sole responsibility and belongs to the following product: Product: L2004A1 Contact Angle Goniometer Serial number: L2004A-0105-1000-3000- xxxx Object of declaration: L2004A1 / Contact Angle Goniometer... - Page 5 хармонизиране, посочено на предходната(-ите) страница(-и) на настоящия документ. [Čeština] Prohlášení o shodě EU Výrobce: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, Spojené Království Prohlašujeme na vlastní odpovědnost, že uvedené zařízeni je v souladu s příslušnými harmonizačními předpisy EU uvedenými na předchozích stranách tohoto dokumentu.
- Page 6 [Por tuguês] Declaração de Conformidade UE Fabricante: Ossila Ltd., Solpro Business Park, Windsor Street, S4 7WD, Reino Unido Declara sob sua exclusiva responsabilidade que o equipamento indicado está em conformidade com a legislação de harmonização relevante da UE mencionada na(s) página(s) anterior(es) deste documento.
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Page 7: Safety
Take care to avoid trapping fingers while adjusting the tilt stage position. 4. Requirements Table 4.1 details the power requirements for the system, and the minimum computer specifications for the Ossila Contact Angle software. Table 4.1.Contact Angle Goniometer and Contact Angle software requirements Power... -
Page 8: Unpacking
Examine the components for evidence of shipping damage. If damage has occurred, please contact Ossila directly for further action. The shipping packaging will come with a shock indicator to show if there has been any mishandling of the package during transportation. -
Page 9: Installation
Connect the system to your computer using the USB cable provided. Next, plug in the power supply for the system and check that the backlight turns on. Run the file ‘Ossila-Contact-Angle-Installer-2-0-x-x.exe’ on the USB drive provided and follow the on- screen instructions to install the Contact Angle Software. -
Page 10: Software Settings
To record a video or an image, follow the instructions below. More detailed information on individual settings will be explained later in this section. Open the Ossila Contact Angle software. Click ‘Start Camera’. I. The image should appear on the right of the screen. - Page 11 (III) Camera Settings • Opens a settings dialogue box for the camera. (IV) Start Camera • Connects to the camera and displays the image in the main viewer. (V) Stop Camera • Stops the video and disconnects from the camera. 8.2.2 Recording Settings Figure 8.3.
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Page 12: Performing Measurements
(IV) Save Directory • Sets the directory in which videos are saved. I. Directory can be input manually or selected using the button with a folder icon. (V) Image/Video Name • Sets the name of the image/video file. I. If a file with the same name is saved, a number will be included in the file name so that the original file is not overwritten. - Page 13 To take a contact angle or surface tension measurements, follow the instructions below in sections 8.3.1 or 8.3.2 respectively. For more detailed information on individual settings, please see later in this section. 8.3.1 Contact Angle Measurements Open the ‘Analyse’ tab. Select ‘Open Video’...
- Page 14 8.3.2 Surface Tension Measurements Note: Before a surface tension measurement can be performed, the system should first be calibrated. For calibration instructions, please see section 9. Open the ‘Analyse’ tab. Select ‘Open Video’ and use the file dialogue to select a video for analysis. The image will appear in the centre of the screen.
- Page 15 8.3.3 Video Controls Figure 8.7 Video Controls Open Video • Opens a dialogue box where you can select a video for analysis. The name of the selected video is then displayed in the window title at the top of the software. (II) Analyse •...
- Page 16 8.3.5 Calibration Controls Calibration Diameter • Select the diameter of the calibration sample under test. The calibration sample provided with the system has a diameter of 10 mm, which is the default value of this field. (II) Calibrate • Performs the calibration procedure on the calibration sample within the region of interest. For more information on calibration, see section 9.
- Page 17 (V) Left RMS Error, Right RMS Error • Shows the root-mean-square error of the fitted droplet to the detected edge data. • A fit with an RMS error value of 1 or more is considered to be poor. 8.3.3 Results Plot Plots the contact angles or surface tensions measured vs frame for the currently selected video or image.
- Page 18 (II) Display Controls Controls how the image appears in the main viewer. • Reset Zoom restores the window to its default zoom. • Reset ROI restores the ROI box to the centre of the screen. Clear Fit removes the contact angle fit from the viewer. •...
- Page 19 First I. Displays the first frame in the video. Previous I. Displays the previous frame in the video. Play (visible while paused) I. Cycles through every frame in the video. II. If ‘Analyse’ button is checked, the contact angle will be measured for each frame. Pause (visible while playing) I.
- Page 20 The x coordinate (in pixels) at the point where the right edge of the Right Contact Point droplet intercepts the baseline Droplet Width (Pixels) The difference in pixels between the left and right contact points Table 8.2. Column names and descriptions for surface tension data saved in the results .csv file. Column Name Description Frame Number...
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Page 21: Calibration
9. Calibration 9.1 Calibration Recording The system is calibrated by focusing on a sphere with a known width. The software detects the edges of the sphere and determines the number of pixels that correspond to the known diameter. The first step in calibration is to record an image or video of the calibration sphere. -
Page 22: Polynomial Fitting
Figure 10.1. Region of interest box. 10.1.1 ROI Box Bottom Line (Baseline) The most important line is the bottom, as this defines the baseline of the measurement. A useful method for determining baseline position is to use the point of reflection of a droplet on a surface. Figure 10.1 shows a droplet reflecting on its substrate. -
Page 23: Canny Edge Detection
If the angle is below 10° then the software uses a circle fit to determine the contact angles, and this is not displayed on the image. 10.3 Canny Edge Detection Canny edge detection is the process by which the software determines the edge pixels of a droplet. Figure 10.3 shows the same droplet as Figure 10.1, however the ‘Show Edges’... - Page 24 Figure 10.5. Visualisation of the Canny edge detection algorithm. Points in green are accepted as edges, and points in red are rejected. Sometimes a line of pixels does contain an edge, but it can’t be detected as the lightness gradients within it all fall below threshold 1.
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Page 25: Pendant Drop Fitting
10.4 Pendant Drop Fitting An optical tensiometer is a tool for measuring the surface tension of a liquid. The surface tension of a liquid determines how it changes shape under gravity, and thus the shape of a droplet as it hangs off a needle tip. - Page 26 Figure 10.9. Plots demonstrating how a change in fitting constant or radius affects the simulated droplet shape. The software iterates through value of radius and B to create many different simulated droplets. It then compares the simulated droplets with the detected edge of the droplet in the region of interest. The simulated fit that most closely matches the detected edge is chosen as the ‘real’...
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Page 27: Troubleshooting
Most of the issues that may arise are detailed below. If you encounter any issues that are not detailed here, then contact us by email at info@ossila.com. We will respond as soon as possible. Table 11.1. Troubleshooting guidelines for the Ossila Contact Angle Goniometer Problem Possible cause Action a. -
Page 28: Related Products
12. Related products 12.1 Related Consumables ITO Coated Substrates Flat Tip Tweezers Our range of 15 x 20 mm ITO substrates Provides a good substrate grip for OPV, OLED and sensing applications. without scratching. Product codes: S111 / S101 / S211 / S281 / S171 Product codes: C121 Ultra-flat Quartz Coated Micropipettes...