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7. LOW RESISTANCE (CONTINUITY) MEASUREMENTS
1. Set the range switch to 200Ω
2. Connect the red test lead to the V Ω terminal and black to the COM
terminal.
3. Connect the tips of the test leads to both ends of the circuit under
test read resistance in Ω on the LCD.
4. When the impedance on circuit is below approximately 40Ω. It will
indicate by a continuous beeper.
8. AC/DC VOLTAGE MEASUREMENTS
1. Set the range switch to ACV or DCV position
2. Connect red test lead to "V Ω" terminal and black test lead to terminal
"COM".
3. Connect test prods of test leads IN PARALLEL to the circuit being
measured.
4. Read the voltage value on LCD.
9. POWER TOOLS AND SMALL APPLIANCES
This test would also apply to other similar equipment that has a line cord.
For double insulated power tools, the megohmmeter lead shown connected
to the housing would be connected to some metal part lf the tool
(e.g. chuck,blade).
Note: The switch of the device must be in the "ON" position and the main
power should be disconnected.
MOTORS
AC-Disconnect the motor from the line by disconnecting the wires at the
motor terminals or by opening the main switch. If the main switch is used
and the motor also has a starter then the starter must be held, by some
means, in the "ON" position. In the latter case, 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 in dicated, the
motor and other components should be checked individually. If the motor is
disconnected at the motor terminals, connect one megohmmeter lead to
the grounded motor housing and the other lead to One of the motor leads.
DC-Disconnect the motor from the line. To test the brush rigging, field coils
and armature connect one megohmmeter lead to the grounded motor
housing and the other lead to the brush on the commutator. If the
resistance measurement indicates a weakness, raise the brushes off the
commutator and separately test the armature, field coils and brush rigging
by connecting one megohmmeter lead to each of them individually, leaving
the other connected to the grounded motor housing. The above also
applies to DC Generators.
Position
9