EXTECH EX380363 [7/10] Applications

Model 380363-EU-EN-V-3.1-1/12

Applications

Measuring Power Tools and Small Appliances

This section applies to any device under test that uses a line cord.

For double insulated power tools, the meter’s leads should be

connected to the device’s housing (chuck, blade, etc.) and to the

lines of the power cord. Refer to the diagram.

Testing AC Motors

Disconnect the motor from the line by disconnecting the wires from the motor terminals or opening

the mains switch.

If the mains switch is opened, and the motor also has a motor-starter, then the starter must be held

in the ON position. With the mains switch opened, the measured resistance will include the

resistance of the motor wire and all other components between the motor and the main switch. If a

weakness is indicated, the motor and other components should be checked individually. If the motor

is disconnected at the motor terminals, connect one meter lead to the grounded motor housing and

the other lead to one of the motor leads. Refer to diagram at below.

Notes:

1. The STARTER must be in the ON position during the

Motor

Starter

Mains

Switch

Line

GND