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