Major tech MT1881 IV Manual de instruções - Página 8
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6.1. DC VOLTAGE MEASUREMENTS
CAUTION: Do not measure DC 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 "DC" position.
2. Insert the black test lead banana plug into the
negative COM jack. Insert the red test lead
banana plug into the positive V jack.
3. Touch the black test probe tip to the negative side
of the circuit. Touch the red test probe tip to the
positive side of the circuit.
4. Read the voltage in the display.
6.2. AC VOLTAGE (FREQUENCY, DUTY CYCLE) MEASUREMENT
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.
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.
1. Set the function switch to the VAC/Hz/%/VFD position, indicate
"AC" on the display.
2. Insert the black test lead banana plug into the COM input jack; insert
the red test lead banana plug into the Positive input jack.
3. Position the black test probe tip and red test probe tip respectively in
the spots of the circuit to be measured
4.
Read the voltage on the display.
5. Press and hold the MODE Button key for 2 seconds to indicate "VFD"
on the display.
6. Read the VFD value on the display.
7.
To exit VFD mode press and hold the MODE Button for 2 seconds.
8. Press the Hz/% Button to indicate "Hz".
9. Read the frequency in the display.
10. Press the Hz/% Button again to indicate "%".
11. Read the % of duty cycle in the display.
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