272 Copyright Goodheart-Willcox Co., Inc. Procedure—Normal Operation 1. Secure the motor to the lab board unless the motor is already attached to lab station. 2. Check the motor name for power connections. Your motor may specify the ungrounded side of line. Make sure this is the wire that is connected to the control switch. 3. Remove the connection cover from the motor, and find the connection terminals. The motor terminals typically require F-type 1/4″ crimp terminals. 4. Supply power to the motor terminals. 5. Use your ohmmeter to check the circuit for any shorts. 6. Get permission from your instructor to plug in lab board or to power up lab station. 7. Turn on the motor. Observe the sound it is making. 8. Measure the voltage applied to the motor. Record. 9. Measure the current while the motor is running. Record. 10. Turn off the motor. Listen to the sound it is making. 11. Allow the shaft to come to a complete stop. 12. Set up the clamp ammeter measure the LRA. Review the instructions for your specific meter. 13. Place the clamp around the wire, and start the motor. Record the LRA current. 14. Turn off the motor. Unplug the lab board or disable power to the lab station. Procedure—No Start Operation 1. Remove the start capacitor cover. 2. Properly discharge the capacitor, and remove one wire from the capacitor. Attach the F-terminal to the opposite blade terminal that is still connected to the capacitor. Capacitors typically have two to four blade terminals for each connection. The intent here is to disconnect the start capacitor from the starting circuit in a safe way. Place the capacitor back into the cover and attach the cover to the motor housing. 3. Place the clamp around wire to measure current (not the LRA). 4. Have a stopwatch ready or count in seconds immediately when turning the motor on. 5. Turn on the motor. Record the current draw. 6. Observe the sound and time recorded. 7. Note any change in the sound and current draw. Record the elapsed time. 8. Disconnect the power to the lab board or lab station. 9. Remove the capacitor cover, and remove the wire from the capacitor. Do not reconnect to the original terminal at this time. 10. Measure the resistance between the two motor terminals where the hot and neutral wires are connected. Record resistance. This is the run winding resistance. Continued