1. DATA LOGGER www.ppttopics.com

2. 1.0 INTRODUCTION O Any device that can be used to store data O Three types of instruments are commonly used for collecting and storing data. -Real-Time Data Acquisition Systems -Chart Recorders -Data Loggers www.ppttopics.com

3. Data Logger O More economical and more flexibility O Greater variety of input types O Can collect data independently of a computer O The recording duration for data logger is dependent on the memory capacity www.ppttopics.com

4. 2.0PARAMETERS INPUT SIGNAL NUMBER OF INPUTS SIZE SPEED/ MEMORY REAL TIME OPERATION www.ppttopics.com

5. 3.0 TYPES 1. Miniature Single Input Data Loggers 2. Fixed Mount Multi-Channel Data Loggers 3. Handheld Multi-Channel Data Loggers 4. Modular Data Loggers www.ppttopics.com

6. 4.0 ADVANTAGES O Attractive alternative. O Ability to accept a greater number of input channels, better resolution and accuracy. O On-board intelligence. O Operate independently of a computer. www.ppttopics.com

7. 5.0 DISADVANTAGES O Data could be lost or not recorded. O Sensors are very sensitive to the highest voltage. O Equipment can be expensive for small tasks. O Only take readings at the logging interval which has been set up. www.ppttopics.com

8. 6.0 APPLICATION 1.ENGAGEMENT 2.EMPOWERING 3.ENHANCING 4.DISCUSSION www.ppttopics.com

9. 6.1 ENGAGEMENT www.ppttopics.com

10. 6.2 EMPOWERING O Resources -Data logger -Light intensity probe -Torch -Metre rule O Method -Shine the torch at the light intensity probe of the data logger. -Take readings of light intensity at increasing distance from the probe. www.ppttopics.com

11. O Data Logger set-up 1. Turn the data logger on by pressing the Enter button and make sure the LCD screen says Easylog enter to begin. 2. Use the arrow button, below the Enter button, to scroll through the various modes until you reach Snapshot. 3. Plug the light intensity probe into the number 1 port. 4. When you are ready to begin recording press Enter. Each time you press Enter it records the light intensity. 5. When you finish press stop. 6. Use the arrow to scroll back to Easylog enter to begin. 7. Plug the data logger into the computer. 8. Open the Sensing Science program and choose Graph. 9. Click on the Collect Remote button in the bottom right corner. 10. A screen comes up with all the remote data that has been saved on the data logger. Choose the one that you want and then click Retrieve. 11. The graph of the information comes up immediately. 12. To change the scale click Display then Auto scale. 13. To change the X-axis click Display then Display wizard then in the X-axis choose Reading number. www.ppttopics.com

12. 6.3 ENHANCING Exercise 1 Compare the light intensity and distance between object and the sources of the light in. Picture 1 and Picture 2. Picture 1 Picture 2 www.ppttopics.com

13. Exercise 2 Give the comparison between flashlight (Picture 3) and laser (Picture 4). Picture 4Picture 3 www.ppttopics.com

14. Answer 1 The intensity or brightness of light as a function of the distance from the light source follows an inverse square relationship. Answer 2 Lasers produce coherent light and used for many things such as making accurate measurements, surgery, reading CDs, and reading the UPC codes on products. A flashlight is a portable electric light in a metal fiber or plastic case. There is a tiny wire in the bulb of a flashlight that is lighted by being brought into contact with the electric from one or more dry cell batteries www.ppttopics.com

15. 6.4 DISCUSSION O The term intensity is used to describe the rate at which light spreads over a surface of a given area some distance from a source. The intensity varies with the distance from the source and the power of the source. O The primary difference between a laser and a flashlight is the wavelength of the light each produces. www.ppttopics.com

16. 7.0 CONCLUSION O Data logger is one of the interactive teaching and learning material in school and can attract student in doing experiment. It help students to conduct the experiments by using data logger device so that the students clear about the significant of data logger in order to get more accurate result and help in data collection. www.ppttopics.com