Extech Instruments MT310 Instrukcja Użytkownika Pobierz pdf (Strona 6)

P31220 Lab

General instructions:

 Record your data in the data table at the end of the lab. You do not have to fill in all of the

boxes. Extra rows are provided for your convenience, and you may add more if you like.

Make sure that you plot enough points to see the data curves clearly.

 Graph each circuit element before moving on to the next. You may need to fill in more data

points after you see what your graph looks like.

 Plot both positive and negative values. The origin will be near the middle of your graph.

 It’s OK if points are out of order in the data tables. However, when graphing, the data points

must be in ascending order. Graphical Analysis can sort them for you using “Data → Sort

Data Set”.

 Include 2% error bars. If the error bars are covered by the point protectors, keep the point

protectors and write a note on the printouts.

 Print the graphs and turn them in with your lab. Make sure that the curves are a dark color

before printing.

Clean-Up:

 Disconnect all wires.

 Turn off the DMMs.

 REPORT any damaged equipment to the TA’s immediately so that they can fix it

before the next class.

 Leave your table neat and tidy. Place all trash and recyclables in the proper containers.

For more information and practice:

There is an excellent Java applet that lets you build DC circuits, observe how they work, and

measure voltages, resistances, and currents. The web address is:

http://phet.colorado.edu/en/simulation/circuit-construction-kit-dc

Modern electronic devices such as cell phones and computers are made out of diodes, transistors,

and other semiconductor devices. One common use for diodes is to convert alternating current

(like what comes out of the wall) to direct current (like what comes out of a battery). Solar cells

are basically semiconductor diodes. To learn more about how semiconductor diodes work, try

the following links:

http://electronics.howstuffworks.com/diode.htm

http://hyperphysics.phy-astr.gsu.edu/hbase/solids/pnjun.html

A LED (light-emitting diode) is a semiconductor diode that gives off light when it is in the

conducting state. Single LEDs are commonly used in indicator lights and in battery-operated

flashlights. Often many LEDs are bunched together, as in automobile tail lights, traffic lights,

and replacements for incandescent light bulbs. This link explains how LEDs work:

http://electronics.howstuffworks.com/led.htm

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Extech Instruments MT310 Instrukcja Użytkownika Strona 6