Topics

1. Welcome to the laboratory specificSafety-Instructionfor the laboratory course Measuring Techniques

2. Topics • Contact persons, laboratory personnel • Requirements for the practical course • Workflow of the practical course • Protocols • Safety instructions

3. Contact persons, laboratory personel • Supervisors: • Dr. F. Lorenz (FGAN, Email: lorenz@fgan.de) • Dr. M. Ulmke (FGAN, Email: ulmke@fgan.de) • R. Martin (FB 03, Email: ralf.martin@fh-bonn-rhein-sieg.de ) • Prof. Dr. U. Essmann (Rm. A 102) • Scientific assistants: • A. Burghammer (Rm. A 244) • D. Schütten (Rm. A 132) Physics laboratory: Room A 165

4. Requirements for the practical course • successful participation in the general as well as the laboratory specific safety instructions • prepare thoroughly for each experiment. • Please be on time • Liability insurance (Haftpflichtversicherung)

5. Workflow of the practical course Each group has to do 4 experiments. Inform yourself about: • your group • the dates of the experiments you have to do • get the description of the experiments in advance. Instructions under: http://fb05.fh-bonn-rhein-sieg.de/Download_Measuring_Techniques.html

6. Workflow of the practical course • The practical course begins and ends at the given times! • Auxiliary dates only in exceptional cases! (e.g. due to illness certificate necessary! ) • The purpose,the aim, and the basics will be discussed at the start of the experiment. Sufficient knowledge is a requirement for the participation in the lab course! • Repeated unprepared appearance to the lab course may lead to exclusion from the lab course!

7. Workflow of the practical course • Prepare the measuring report in advance at home • Never start with an experiment, before you received the introduction to the experiment • The measuring report is attested (Vortestat), if the experiment is finished and your place is cleaned up. – This is not a guarantee that your data are correct! – You are responsible for your measurements!

8. Protocols • Observe the deadlines for the protocols: One week after the practical course started, until 16:00 o'clock. • Evaluation: 0 to 3 Points in steps of 0,5 P. One week after delivery you can look into the evaluated protocols. • You can look at your protocols during one of the practical classes (Mon at 8:15 , or Tue at 11:45, or Wed at 11:45) • Laboratory course is completed when four protocols are attested.

9. Protocols • Cover sheet • Task/Objective • Sketch of the experiment / parts list • Preparation, answers to the list of questions • measurement report • Evaluation (calculation, results, diagrams) • Discussion / error analysis Detailed information about the preferred structure and content of the protocols can be found under: http://fb05.fh-bonn-rhein-sieg.de/Download_Measuring_Techniques.html

10. Safety instructions • General • Laboratory specific • Protective clothing • Handling glassware • Handling electrical devices • Handling Lasers • Treatment of burns • Proceeding in current accidents

11. General • Pay attention to the laboratory order. • Don‘t eat, drink, smoke or use your cellular phonein the laboratory • Escape routes have to be kept free at all times. • Know the locations and operating procedures of all safety equipment including: first aid kit(s), fire extinguisher, emergency stop switch, emergency shower, eye bath, telephone, escape routes, fire blankets. • Report accidents immediately. • Never start with an experiment, before you got the introduction to the experiment. Please ask if there are questions during the experiment.

12. Protective clothing • Special protective clothing is generally not necessary in physics/measuring technique laboratory. Nevertheless pay attention to appropriate clothes.

13. Handling Glassware • Always use clean and intact glassware • Clean the glassware after usage and return itto its place • Breakage of glass has to be announced • Don‘t put broken glasses into the trash bin • Some glassware may become very hot during the experiment. > Don‘t burn yourself!

14. Handling of Electrical Devices • Always use intact cables and devices • Consult the laboratory personnel before switching on any devices • During all changes in the experimental setup the current has to be switched off • You should never pull on cables but always on plugs • Avoid open contacts • Some electrical devices may become very hot. > Don‘t burn yourself! 

15. Handling of Lasers • Never look into the laser beam • Don‘t introduce reflective material into the optical path of the laser (Wristwatch, rings, bracelet,...) • The setup has to be mounted in a stable position • The optical way of the laser may not run at eye level

16. Treatment of burns • cool with flowing water / with cold clothes • inform laboratory personnel immediately

17. Instructions for accidents with electrical current • Interrupt the circuit immediately • Push Emergency Stop If the emergency stop of the circuit is not possible, don‘t pull the injured people with bare hands! The victim might be energized. • Apnea > mouth-to-mouth breathing • Cardiac arrest>mouth-to-mouth breathing and chest compressions • emergency call • no apnea / circulatory stop >recovery position • inform laboratory personnel immediately

18. Experiments in WS08/09 • Electrical resistance/ Wheatstone bridge • Parameters of alternating currents • Optical Images and Optical Instruments • Diffraction Grating Spectroscopy Instruction of Experiments under: http://fb05.fh-bonn-rhein-sieg.de/Download_Measuring_Techniques.html

19. Electrical resistance/ Wheatstone bridge Task: Measurement of current and voltages in series and parallel circuits of resistors Measurement of the body temperature with a PT 100 and a Wheatstone bridge

20. Parameters of alternating currents Device: Oscilloscope Task: Determination of parameters of a sinoidal alternating current with an oscilloscope Characterization of the charging and discharging process of a capacitor Determination of the phase shift between voltage and current at a capacitor

21. Optical Images and Optical Instruments Device: Optical bench Task: Determination of the focal length by repeated measurement of object and image distances Assembly of a two stage magnification: Microscope

22. Diffraction Grating Spectroscopy Task: Determination of the grating spacing with a He line spectrum Identification of an unknown light source with the line spectrum

23. THE END!!!