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Daily Sprint
1. Is a non-metal a conductor, insulator, or semiconductor?
2. Is a metalloid a conductor, insulator, or semiconductor?
3. Draw a manganese atom (Atomic number: 25).
START
Quick Review
• What are some characteristics of metals?
• How many valence electrons does a conductor have?
• How many valence electrons does an insulator have?
• What are some characteristics of non-metals?
Using a MultimeterPart 1
What is a Multimeter?
An instrument for measuring the properties of an electrical circuit
Who Uses Multimeters?•Electrical Engineers•Electronics Engineers•Scientists•Technicians•Electricians
•Chemists•Networking Engineers•Computer Engineers•Many Others . . .
Manual vs. Auto Ranging
Manual The user is responsible
for choosing a setting by anticipating the output.
Always choose a setting higher than what you think the reading will be.
Manual vs. Auto Ranging Where should you set the meter if you expect a reading around . . .
1000 volts200 volts
20 volts
2000 millivolts
200 millivolts
6 volts
50 millivolts
800 millivolts
800 volts
125 volts
Manual vs. Auto Ranging
Auto The meter adjusts
based on the input to provide the most detailed reading.
Auto ranging meters are generally a little more expensive.
Test Leads
Standard Test Leads
Alligator Clip LeadsHook Leads
Continuity
The continuous flow through a component or an entire circuit
If the answer to the questions below is yes, then there is continuity.
Is the material a conductor?
Is there an uninterrupted path between the two points?
Testing for Continuity
Method 1
There will be a speaker icon where resistance is measured.
The meter will beep to indicate continuity.
Testing for Continuity
Method 2
Turn the dial to a setting for Ohms.
The meter will read zero to indicate continuity.
Image Resources
Microsoft, Inc. (2008). Clip Art. Retrieved September 10, 2008, from http://office.microsoft.com/en-us/clipart/default.aspx
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