EXTECH MG325 [8/18] Ac voltage measurements

8 MG325-en-GB_v1.1 3/16

6.5 AC VOLTAGE MEASUREMENTS

WARNING: Risk of Electrocution. The probe tips may not be long enough to contact the live parts inside

some 240V outlets for appliances because the contacts are recessed deep in the outlets. As a result, the reading

may show 0 volts when the outlet actually has voltage on it. Make sure the probe tips are touching the metal

contacts inside the outlet before assuming that no voltage is present.

CAUTION

Do not measure AC voltages if a motor on the circuit is being switched ON or OFF. Large voltage surges may

occur that can damage the meter.

Do not measure voltages higher than 600V

When the measured voltage is > 60VDC or 600VAC the meter flashes the warning icon on the upper left.

Do not measure AC voltages if a motor on the circuit is being switched ON or OFF. Large voltage surges may

occur that can damage the meter.

1. Set the function switch to the position.

2. Insert the black test lead banana plug into the negative EARTH

jack (6).

Insert red test lead banana plug into the positive V jack (7).

3. Touch the black test probe tip to the neutral side of the circuit.

Touch the red test probe tip to the “hot” side of the circuit.

4. Read the voltage in the main display and in the lower bargraph.

5. Read the Frequency in the auxiliary display (upper right)

6. Short press the H (Hold) button to freeze (H icon displayed) or

unfreeze (no H icon displayed) the displayed reading.

7. Press

to store the reading

8. Note that the Auto Power OFF function activates after 10

minutes of inactivity. The meter will audibly beep just prior to

shutting off.

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