1. Operating a Amp – Volt – Ohm Meter
Created for CVCA Physics By
Dick Heckathorn
3 March 2K + 14

2. Function Range Switch
10 A Jack 4 1
Common Jack 3
V, Ω, mA
Jack 2

3. DC Volts
AC Volts 1 2
DC Amps
Resistance 4 3
Diode 5

4. Measuring DC Current Using the meter as an Ammeter

5. Measuring DC Current
1. Complete the hookup without making the final connection to the power source. A

6. 3. Rotate the dial to the maximum setting on the DCA Range
Measuring DC Current
3. Rotate the dial to the maximum setting on the DCA Range
4. Make the connection to the power source to send a current through the circuit.

7. 5. Reduce the DC Amp setting step-by-step until a reading is obtained.
Measuring DC Current
5. Reduce the DC Amp setting step-by-step until a reading is obtained.
6. Record the reading.
What if the reading is in mAmps?
Convert the reading to Amps.

8. 7. Disconnect the wire from the power source.
Measuring DC Current
7. Disconnect the wire from the power source.
8. Rotate the meter dial to off.

9. Measuring DC Voltage Using the meter as a Voltmeter

10. Measuring DC Voltage
1. Complete the hookup without making the final connection to the power source.

11. Measuring DC Voltage
2. Connect the leads of the meter across the region you wish to know the voltage. V

12. 3. Rotate the dial to the maximum setting on the DCV Range
Measuring DC Voltage
3. Rotate the dial to the maximum setting on the DCV Range
4. Make the connection to the power source to send a current through the circuit.

13. 7. Disconnect the meter wires from the circuit.
Measuring DC Voltage
5. Reduce the DC-Volt setting step-by-step until a reading is obtained.
6. Record the reading.
7. Disconnect the meter wires from the circuit.
8. Rotate the meter dial to off.

14. Measure the voltage of the battery.
NO!
NO!
NO!
DON’T DO IT !!!!
Voltmeter connected in
SERIES

15. There are special meters to do this.

16. Measuring Resistance

17. 1. Connect the meter leads, one to each end of a resistor.
Measuring Resistance
1. Connect the meter leads, one to each end of a resistor.
2. Rotate the meter dial in the resistance range until a reading is obtained.
3. Record the reading.
4. Rotate the meter dial to off.

18. That’s all folks!