Chapter 7 The Technical Laboratory Introduction to Engineering Technology Seventh Edition Robert J. Pond & Jeffery L. Rankinen Chapter 7 The Technical Laboratory

Introduction This chapter is intended to make you aware of how to work safely and effectively in the laboratory and report your findings clearly and efficiently.

Laboratory Technician Be patient and methodical Pay attention to detail Plan and prepare Be accurate Communicate clearly and effectively Corning example – Report writing and presentations important. Formal report.

Scientific Method – Problem Solving State the problem Form the hypothesis Experiment and observe Interpret the data Arrive at the conclusion

Performing the Experiment Equipment specified Data sheets Group work Conclusions drawn

Reducing Error in the Laboratory

Data Collection and Calculating Results Scale Resolution – no better than one-half of the smallest division

Data Collection and Calculating Results Digital Meter Accuracy – specified as +/- (percent of reading + number of units in the least significant digit) Example: Stated accuracy: +/- (0.5 + 2) Scale reading of 1000 for Figure 7.10 1000*0.005+2 = +/- 7 volts

Presenting Data - Graphing

Reporting Outlining the written report Objective section Equipment section Theory section Procedure section Data section Calculation section Results section Conclusion section Preparing and submitting the report The report checklist Oral reporting Oral report checklist

Reporting

Reporting