Operating Instructions; Dc Voltage Measurements; Ac Voltage Measurements (Frequency, Duty Cycle) - Multimetrix DMM 220 Manual De Instrucciones

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3.

OPERATING INSTRUCTIONS

Risk of electrocution. High-voltage circuits, both AC and DC,
are very dangerous and should be measured with great care.
1. Always turn the function switch to the OFF position when the
multimeter is not in use.
2. If "OL" appears on screen during a measurement, the value
exceeds the range you have selected. Choose a higher range.

3.1 DC voltage measurements

Do not measure DC voltages if a motor on the circuit is being
switched ON or OFF. Voltage surges may occur and damage
the multimeter.
1. Set the function switch to the VDC position.
1. Insert the black test lead banana plug into the
negative COM terminal.
Insert the red test lead banana plug into the
positive + terminal.
2. Apply the test probes to the points of the circuit
to be tested.
3. The voltage measured is displayed on screen.

3.2 AC voltage measurements (frequency, duty cycle)

Risk of Electrocution. The test probes may not be long enough
to reach the live parts in certain sockets whose contacts are
recessed too deeply. As a result, the reading may show 0 volts
when the wall socket is live. Make sure the test probes are touching
the live parts before assuming that no voltage is present.
Do not measure AC voltages if a motor on the circuit is being
switched ON or OFF. Voltage surges may occur that can
damage the multimeter.
22
Chapter II
DMM220

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