Mastech MS8228, Operation Manual

Page: 18 / 26

DIGITAL MULTIMETER
OPERATING INSTRUCTION NTS
4.13.5 Take the reading on the main indicator of the LCD.
The polarity symbol denotes the polarity of the end
connected by the red test lead.
NOTE: NOTE: NOTE: NOTE:
1) At small voltage range, unsteady readings will appear
before the test leads contact the circuit. This is
normal because the meter is highly sensitive. When
the test leads contact the circuit, the true reading will
be shown.
2) Under the manual range mode, when only ‘OL’ or ‘-OL’
is shown on the LCD, it means the measurement has
exceeded the range. A higher range should be
selected.
3) Under the manual range mode, when the scale of the
value to be measured is unknown beforehand, select
the highest range first and lower the range gradually.
4.1
4.1 4.1
4.14
4 4
4 MEASURING
MEASURING MEASURING
MEASURING AC
AC AC
AC VOLTAGE
VOLTAGE VOLTAGE
VOLTAGE
WARNING
WARNING
WARNING WARNING
Beware Beware Beware Beware of of of of Electrocutio Electrocutio Electrocutio Electrocution n n n....
Pay
Pay
Pay Pay special
special
special special attention
attention
attention attention to
to
to to avoid
avoid
avoid avoid electric
electric
electric electric shock
shock
shock shock when
when
when when
measuring
measuring
measuring measuring high
high
high high voltage.
voltage.
voltage. voltage.
Do Do Do Do not not not not input input input input any any any any voltage voltage voltage voltage 750V 750V 750V 750V rms rms rms rms AC AC AC AC,,,, which which which which may may may may
destroy destroy destroy destroy the the the the inner inner inner inner circuit circuit circuit circuit,,,, although although although although a a a a higher higher higher higher voltage voltage voltage voltage
can can can can be be be be shown shown shown shown....
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DIGITAL MULTIMETER
OPERATING INSTRUCTION NTS
4.14.1 Plug the black test lead into the COM jack and the
red test lead into the V jack.
4.14.2 Set the rotary selector to the V range position.
4.14.3 Press the "SELECT" button to switch to AC
measurement. Then press the “RANGE” button to
choose the auto range or manual range mode.
4.14.4 Connect the test leads to the voltage source or load
terminals for measurement.
4.14.5 Take the reading on the main indicator of the LCD.
NOTE: NOTE: NOTE: NOTE:
1) At small voltage range, unsteady readings may appear
before the test leads contact the circuit. This is
normal because the meter is highly sensitive. When
the test leads contact the circuit, the true reading will
be shown.
2) At the manual range mode, when only ‘OL’ or ‘-OL’ is
shown on the LCD, it means the measurement has
exceeded the range. A higher range should be
selected.
3) At the manual range mode, when the scale of the value
to be measured is unknown beforehand, select the
highest range first and lower the range gradually.
4.1 4.1 4.1 4.15 5 5 5 MEASURING MEASURING MEASURING MEASURING DC DC DC DC MILLIVOLTAGE MILLIVOLTAGE MILLIVOLTAGE MILLIVOLTAGE
4.15.1 Plug the black test lead into the COM jack and the
red test lead into the V jack.
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